From: Chandan Uddaraju chandanu@codeaurora.org

Add bindings for Snapdragon DisplayPort and display-port PLL driver.

Changes in V2: Provide details about sel-gpio

Changes in V4: Provide details about max dp lanes Change the commit text

Changes in V5: Moved dp.txt to yaml file.

Signed-off-by: Chandan Uddaraju chandanu@codeaurora.org Signed-off-by: Vara Reddy varar@codeaurora.org --- .../devicetree/bindings/display/msm/dp-sc7180.yaml | 325 +++++++++++++++++++++ .../devicetree/bindings/display/msm/dpu.txt | 16 +- 2 files changed, 337 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/msm/dp-sc7180.yaml

diff --git a/Documentation/devicetree/bindings/display/msm/dp-sc7180.yaml b/Documentation/devicetree/bindings/display/msm/dp-sc7180.yaml new file mode 100644 index 0000000..761a01d --- /dev/null +++ b/Documentation/devicetree/bindings/display/msm/dp-sc7180.yaml @@ -0,0 +1,325 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/msm/dp-sc7180.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Description of Qualcomm Display Port dt properties. + +maintainers: + - Chandan Uddaraju chandanu@codeaurora.org + - Vara Reddy varar@codeaurora.org + +description: | + Device tree bindings for MSM Display Port which supports DP host controllers + that are compatible with VESA Display Port interface specification. + +properties: + "msm_dp": + type: object + description: | + Node containing Display port register address bases, clocks, power supplies. + + properties: + compatible: + items: + - const: qcom,dp-display + + cell-index: + description: Specifies the controller instance. + + reg: + description: Physical base address and length of controller's registers. + + reg-names: + description: | + Names for different register regions defined above. The required region + is mentioned below. + items: + - const: dp_ahb + - const: dp_aux + - const: dp_link + - const: dp_p0 + - const: dp_phy + - const: dp_ln_tx0 + - const: dp_ln_tx1 + - const: afprom_physical + - const: dp_pll + - const: usb3_dp_com + - const: hdcp_physical + + interrupts: + description: The interrupt signal from the DP block. + + clocks: + description: List of clock specifiers for clocks needed by the device. + + clock-names: + description: | + Device clock names in the same order as mentioned in clocks property. + The required clocks are mentioned below. + items: + - const: core_aux_clk + - const: core_ref_clk_src + - const: core_usb_ref_clk + - const: core_usb_cfg_ahb_clk + - const: core_usb_pipe_clk + - const: ctrl_link_clk + - const: ctrl_link_iface_clk + - const: ctrl_pixel_clk + - const: crypto_clk + - const: pixel_clk_rcg + + pll-node: + description: phandle to DP PLL node. + + vdda-1p2-supply: + description: phandle to vdda 1.2V regulator node. + + vdda-0p9-supply: + description: phandle to vdda 0.9V regulator node. + + aux-cfg0-settings: + description: | + Specifies the DP AUX configuration 0 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg1-settings: + description: | + Specifies the DP AUX configuration 1 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg2-settings: + description: | + Specifies the DP AUX configuration 2 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg3-settings: + description: | + Specifies the DP AUX configuration 3 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg4-settings: + description: | + Specifies the DP AUX configuration 4 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg5-settings: + description: | + Specifies the DP AUX configuration 5 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg6-settings: + description: | + Specifies the DP AUX configuration 6 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg7-settings: + description: | + Specifies the DP AUX configuration 7 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg8-settings: + description: | + Specifies the DP AUX configuration 8 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + aux-cfg9-settings: + description: | + Specifies the DP AUX configuration 9 settings. + The first entry in this array corresponds to the register offset + within DP AUX, while the remaining entries indicate the + programmable values. + + max-pclk-frequency-khz: + description: Maximum displayport pixel clock supported for the chipset. + + data-lanes: + description: Maximum number of lanes that can be used for Display port. + + usbplug-cc-gpio: + maxItems: 1 + description: Specifies the usbplug orientation gpio. + + aux-en-gpio: + maxItems: 1 + description: Specifies the aux-channel enable gpio. + + aux-sel-gpio: + maxItems: 1 + description: Specifies the sux-channel select gpio. + + ports: + description: | + Contains display port controller endpoint subnode. + remote-endpoint: | + For port@0, set to phandle of the connected panel/bridge's + input endpoint. For port@1, set to the DPU interface output. + Documentation/devicetree/bindings/graph.txt and + Documentation/devicetree/bindings/media/video-interfaces.txt. + + "dp_pll": + type: object + description: Node contains properties of Display port pll and phy driver. + + properties: + compatible: + items: + - const: qcom,dp-pll-10nm + + cell-index: + description: Specifies the controller instance. + + reg: + description: Physical base address and length of DP phy and pll registers. + + reg-names: + description: | + Names for different register regions defined above. The required region + is mentioned below. + items: + - const: pll_base + - const: phy_base + - const: ln_tx0_base + - const: ln_tx1_base + - const: gdsc_base + + clocks: + description: List of clock specifiers for clocks needed by the device. + + clock-names: + description: | + Device clock names in the same order as mentioned in clocks property. + The required clocks are mentioned below. + items: + - const: iface + - const: ref + - const: cfg_ahb + - const: pipe + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/qcom,dispcc-sdm845.h> + #include <dt-bindings/clock/qcom,gcc-sdm845.h> + #include <dt-bindings/clock/qcom,rpmh.h> + #include <dt-bindings/gpio/gpio.h> + msm_dp: displayport-controller@ae90000{ + cell-index = <0>; + compatible = "qcom,dp-display"; + reg = <0 0xae90000 0 0x200>, + <0 0xae90200 0 0x200>, + <0 0xae90400 0 0xc00>, + <0 0xae91000 0 0x400>, + <0 0x88eaa00 0 0x200>, + <0 0x88ea200 0 0x200>, + <0 0x88ea600 0 0x200>, + <0 0x780000 0 0x6228>, + <0 0x088ea000 0 0x40>, + <0 0x88e8000 0 0x20>, + <0 0x0aee1000 0 0x034>; + reg-names = "dp_ahb", "dp_aux", "dp_link", + "dp_p0", "dp_phy", "dp_ln_tx0", "dp_ln_tx1", + "qfprom_physical", "dp_pll", + "usb3_dp_com", "hdcp_physical"; + + interrupt-parent = <&display_subsystem>; + interrupts = <12 0>; + + clocks = <&dispcc DISP_CC_MDSS_DP_AUX_CLK>, + <&rpmhcc RPMH_CXO_CLK>, + <&gcc GCC_USB3_PRIM_CLKREF_CLK>, + <&gcc GCC_USB_PHY_CFG_AHB2PHY_CLK>, + <&gcc GCC_USB3_PRIM_PHY_PIPE_CLK>, + <&dispcc DISP_CC_MDSS_DP_LINK_CLK>, + <&dispcc DISP_CC_MDSS_DP_LINK_INTF_CLK>, + <&dispcc DISP_CC_MDSS_DP_PIXEL_CLK>, + <&dispcc DISP_CC_MDSS_DP_CRYPTO_CLK>, + <&dispcc DISP_CC_MDSS_DP_PIXEL_CLK_SRC>; + clock-names = "core_aux_clk", "core_ref_clk_src", + "core_usb_ref_clk", "core_usb_cfg_ahb_clk", + "core_usb_pipe_clk", "ctrl_link_clk", + "ctrl_link_iface_clk", "ctrl_pixel_clk", + "crypto_clk", "pixel_clk_rcg"; + + pll-node = <&dp_pll>; + vdda-1p2-supply = <&vreg_l3c_1p2>; + vdda-0p9-supply = <&vreg_l4a_0p8>; + + aux-cfg0-settings = [20 00]; + aux-cfg1-settings = [24 13 23 1d]; + aux-cfg2-settings = [28 24]; + aux-cfg3-settings = [2c 00]; + aux-cfg4-settings = [30 0a]; + aux-cfg5-settings = [34 26]; + aux-cfg6-settings = [38 0a]; + aux-cfg7-settings = [3c 03]; + aux-cfg8-settings = [40 bb]; + aux-cfg9-settings = [44 03]; + + max-pclk-frequency-khz = <67500>; + data-lanes = <2>; + + aux-en-gpio = <&msmgpio 55 1>; + aux-sel-gpio = <&msmgpio 110 1>; + usbplug-cc-gpio = <&msmgpio 90 1>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dp_in: endpoint { + remote-endpoint = <&dpu_intf0_out>; + }; + }; + + port@1 { + reg = <1>; + dp_out: endpoint { + }; + }; + }; + }; + + dp_pll: dp-pll@088ea000 { + compatible = "qcom,dp-pll-10nm"; + label = "DP PLL"; + cell-index = <0>; + #clock-cells = <1>; + + reg = <0 0x088ea000 0 0x200>, + <0 0x088eaa00 0 0x200>, + <0 0x088ea200 0 0x200>, + <0 0x088ea600 0 0x200>, + <0 0x08803000 0 0x8>; + reg-names = "pll_base", "phy_base", "ln_tx0_base", + "ln_tx1_base", "gdsc_base"; + + clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>, + <&gcc GCC_USB3_PRIM_CLKREF_CLK>, + <&gcc GCC_USB_PHY_CFG_AHB2PHY_CLK>, + <&gcc GCC_USB3_PRIM_PHY_PIPE_CLK>; + clock-names = "iface_clk", "ref_clk", + "cfg_ahb_clk", "pipe_clk"; + }; + diff --git a/Documentation/devicetree/bindings/display/msm/dpu.txt b/Documentation/devicetree/bindings/display/msm/dpu.txt index 551ae26..7e99e45 100644 --- a/Documentation/devicetree/bindings/display/msm/dpu.txt +++ b/Documentation/devicetree/bindings/display/msm/dpu.txt @@ -63,8 +63,9 @@ Required properties: Documentation/devicetree/bindings/graph.txt Documentation/devicetree/bindings/media/video-interfaces.txt

- Port 0 -> DPU_INTF1 (DSI1) - Port 1 -> DPU_INTF2 (DSI2) + Port 0 -> DPU_INTF0 (DP) + Port 1 -> DPU_INTF1 (DSI1) + Port 2 -> DPU_INTF2 (DSI2)

Optional properties: - assigned-clocks: list of clock specifiers for clocks needing rate assignment @@ -125,13 +126,20 @@ Example:

port@0 { reg = <0>; - dpu_intf1_out: endpoint { - remote-endpoint = <&dsi0_in>; + dpu_intf0_out: endpoint { + remote-endpoint = <&dp_in>; }; };

port@1 { reg = <1>; + dpu_intf1_out: endpoint { + remote-endpoint = <&dsi0_in>; + }; + }; + + port@2 { + reg = <2>; dpu_intf2_out: endpoint { remote-endpoint = <&dsi1_in>; };

From: Chandan Uddaraju chandanu@codeaurora.org

Add the needed displayPort files to enable DP driver on msm target.

"dp_display" module is the main module that calls into other sub-modules. "dp_drm" file represents the interface between DRM framework and DP driver.

changes in v2: -- Update copyright markings on all relevant files. -- Change pr_err() to DRM_ERROR() -- Use APIs directly instead of function pointers. -- Use drm_display_mode structure to store link parameters. -- Use macros for register definitions instead of hardcoded values. -- Replace writel_relaxed/readl_relaxed with writel/readl and remove memory barriers. -- Remove unnecessary NULL checks. -- Use drm helper functions for dpcd read/write. -- Use DRM_DEBUG_DP for debug msgs.

changes in V3: -- Removed changes in dpu_io_util.[ch] -- Added locking around "is_connected" flag and removed atomic_set() -- Removed the argument validation checks in all the static functions except initialization functions and few API across msm/dp files. -- Removed hardcoded values for register reads/writes -- Removed vreg related generic structures. -- Added return values where ever necessary. -- Updated dp_ctrl_on function. -- Calling the ctrl specific catalog functions directly instead of function pointers. -- Added separate change that adds standard value in drm_dp_helper file. -- Added separate change in this list that is used to initialize DP. -- Added change to use drm_dp_get_adjust_request_voltage() function.

changes in V4: -- Fix mvid, nvid calculation. -- Shift video timings to align to bottom right. -- Fix register offsets for pixel_m and pixel_n. -- Fix TPG programming sequence. -- Update DP ack override register to recommended value. -- Added code to log displayport registers. -- Update aux setup with recommended settings. -- Fix TU calculations for all resolutions. -- Limit linkrate to HBR2 until HBR3 support is added. -- Update DPCD read sequence. -- Update code comments in dp_power_init() of V3. -- Remove extcon dependencies. -- Move drm helper functions locally.

changes in V5: -- Addressed comments from Jordan.

Signed-off-by: Chandan Uddaraju chandanu@codeaurora.org Signed-off-by: Vara Reddy varar@codeaurora.org --- drivers/gpu/drm/msm/Kconfig | 8 + drivers/gpu/drm/msm/Makefile | 12 + drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 20 + .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 8 + drivers/gpu/drm/msm/dp/dp_aux.c | 531 ++++++ drivers/gpu/drm/msm/dp/dp_aux.h | 35 + drivers/gpu/drm/msm/dp/dp_catalog.c | 972 +++++++++++ drivers/gpu/drm/msm/dp/dp_catalog.h | 86 + drivers/gpu/drm/msm/dp/dp_ctrl.c | 1707 ++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_ctrl.h | 35 + drivers/gpu/drm/msm/dp/dp_display.c | 897 ++++++++++ drivers/gpu/drm/msm/dp/dp_display.h | 28 + drivers/gpu/drm/msm/dp/dp_drm.c | 170 ++ drivers/gpu/drm/msm/dp/dp_drm.h | 19 + drivers/gpu/drm/msm/dp/dp_hpd.c | 69 + drivers/gpu/drm/msm/dp/dp_hpd.h | 79 + drivers/gpu/drm/msm/dp/dp_link.c | 1216 ++++++++++++++ drivers/gpu/drm/msm/dp/dp_link.h | 132 ++ drivers/gpu/drm/msm/dp/dp_panel.c | 490 ++++++ drivers/gpu/drm/msm/dp/dp_panel.h | 95 ++ drivers/gpu/drm/msm/dp/dp_parser.c | 480 ++++++ drivers/gpu/drm/msm/dp/dp_parser.h | 218 +++ drivers/gpu/drm/msm/dp/dp_power.c | 545 +++++++ drivers/gpu/drm/msm/dp/dp_power.h | 46 + drivers/gpu/drm/msm/dp/dp_reg.h | 489 ++++++ drivers/gpu/drm/msm/msm_drv.c | 2 + drivers/gpu/drm/msm/msm_drv.h | 53 +- 27 files changed, 8439 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/drm/msm/dp/dp_aux.c create mode 100644 drivers/gpu/drm/msm/dp/dp_aux.h create mode 100644 drivers/gpu/drm/msm/dp/dp_catalog.c create mode 100644 drivers/gpu/drm/msm/dp/dp_catalog.h create mode 100644 drivers/gpu/drm/msm/dp/dp_ctrl.c create mode 100644 drivers/gpu/drm/msm/dp/dp_ctrl.h create mode 100644 drivers/gpu/drm/msm/dp/dp_display.c create mode 100644 drivers/gpu/drm/msm/dp/dp_display.h create mode 100644 drivers/gpu/drm/msm/dp/dp_drm.c create mode 100644 drivers/gpu/drm/msm/dp/dp_drm.h create mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.c create mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.h create mode 100644 drivers/gpu/drm/msm/dp/dp_link.c create mode 100644 drivers/gpu/drm/msm/dp/dp_link.h create mode 100644 drivers/gpu/drm/msm/dp/dp_panel.c create mode 100644 drivers/gpu/drm/msm/dp/dp_panel.h create mode 100644 drivers/gpu/drm/msm/dp/dp_parser.c create mode 100644 drivers/gpu/drm/msm/dp/dp_parser.h create mode 100644 drivers/gpu/drm/msm/dp/dp_power.c create mode 100644 drivers/gpu/drm/msm/dp/dp_power.h create mode 100644 drivers/gpu/drm/msm/dp/dp_reg.h

diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig index 6deaa7d..ea3c4d0 100644 --- a/drivers/gpu/drm/msm/Kconfig +++ b/drivers/gpu/drm/msm/Kconfig @@ -57,6 +57,14 @@ config DRM_MSM_HDMI_HDCP help Choose this option to enable HDCP state machine

+config DRM_MSM_DP + bool "Enable DP support in MSM DRM driver" + depends on DRM_MSM + help + Compile in support for DP driver in msm drm driver. DP external + display support is enabled through this config option. It can + be primary or secondary display on device. + config DRM_MSM_DSI bool "Enable DSI support in MSM DRM driver" depends on DRM_MSM diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 1579cf0..3e078d5 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -2,6 +2,7 @@ ccflags-y := -I $(srctree)/$(src) ccflags-y += -I $(srctree)/$(src)/disp/dpu1 ccflags-$(CONFIG_DRM_MSM_DSI) += -I $(srctree)/$(src)/dsi +ccflags-$(CONFIG_DRM_MSM_DP) += -I $(srctree)/$(src)/dp

msm-y := \ adreno/adreno_device.o \ @@ -98,6 +99,17 @@ msm-$(CONFIG_DEBUG_FS) += adreno/a5xx_debugfs.o

msm-$(CONFIG_DRM_MSM_GPU_STATE) += adreno/a6xx_gpu_state.o

+msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \ + dp/dp_catalog.o \ + dp/dp_ctrl.o \ + dp/dp_display.o \ + dp/dp_drm.o \ + dp/dp_hpd.o \ + dp/dp_link.o \ + dp/dp_panel.o \ + dp/dp_parser.o \ + dp/dp_power.o + msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o msm-$(CONFIG_COMMON_CLK) += disp/mdp4/mdp4_lvds_pll.o msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_pll_8960.o diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index f8ac3bf..b063243 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -978,6 +978,9 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,

trace_dpu_enc_mode_set(DRMID(drm_enc));

+ if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) + msm_dp_display_mode_set(priv->dp, drm_enc, mode, adj_mode); + list_for_each_entry(conn_iter, connector_list, head) if (conn_iter->encoder == drm_enc) conn = conn_iter; @@ -1141,6 +1144,7 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc) { struct dpu_encoder_virt *dpu_enc = NULL; int ret = 0; + struct msm_drm_private *priv; struct drm_display_mode *cur_mode = NULL;

if (!drm_enc) { @@ -1151,6 +1155,7 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)

mutex_lock(&dpu_enc->enc_lock); cur_mode = &dpu_enc->base.crtc->state->adjusted_mode; + priv = drm_enc->dev->dev_private;

trace_dpu_enc_enable(DRMID(drm_enc), cur_mode->hdisplay, cur_mode->vdisplay); @@ -1171,6 +1176,15 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)

_dpu_encoder_virt_enable_helper(drm_enc);

+ if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) { + ret = msm_dp_display_enable(priv->dp, + drm_enc); + if (ret) { + DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n", + ret); + goto out; + } + } dpu_enc->enabled = true;

out: @@ -1201,6 +1215,12 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc) priv = drm_enc->dev->dev_private; dpu_kms = to_dpu_kms(priv->kms);

+ if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) { + if (msm_dp_display_disable(priv->dp, drm_enc)) { + DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n"); + return; + } + } trace_dpu_enc_disable(DRMID(drm_enc));

/* wait for idle */ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index c71c18d..c1dfcc4 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -100,6 +100,14 @@ static void drm_mode_to_intf_timing_params( * display_v_end -= mode->hsync_start - mode->hdisplay; * } */ + /* for DP/EDP, Shift timings to align it to bottom right */ + if ((phys_enc->hw_intf->cap->type == INTF_DP) || + (phys_enc->hw_intf->cap->type == INTF_EDP)) { + timing->h_back_porch += timing->h_front_porch; + timing->h_front_porch = 0; + timing->v_back_porch += timing->v_front_porch; + timing->v_front_porch = 0; + } }

static u32 get_horizontal_total(const struct intf_timing_params *timing) diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c new file mode 100644 index 0000000..73e0388 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_aux.c @@ -0,0 +1,531 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#include <linux/delay.h> + +#include "dp_reg.h" +#include "dp_aux.h" + +#define DP_AUX_ENUM_STR(x) #x + +struct dp_aux_private { + struct device *dev; + struct dp_aux dp_aux; + struct dp_catalog *catalog; + + struct mutex mutex; + struct completion comp; + + u32 aux_error_num; + u32 retry_cnt; + bool cmd_busy; + bool native; + bool read; + bool no_send_addr; + bool no_send_stop; + u32 offset; + u32 segment; + u32 isr; + + struct drm_dp_aux drm_aux; +}; + +static const char * const dp_aux_get_error(u32 aux_error) +{ + switch (aux_error) { + case DP_AUX_ERR_NONE: + return DP_AUX_ENUM_STR(DP_AUX_ERR_NONE); + case DP_AUX_ERR_ADDR: + return DP_AUX_ENUM_STR(DP_AUX_ERR_ADDR); + case DP_AUX_ERR_TOUT: + return DP_AUX_ENUM_STR(DP_AUX_ERR_TOUT); + case DP_AUX_ERR_NACK: + return DP_AUX_ENUM_STR(DP_AUX_ERR_NACK); + case DP_AUX_ERR_DEFER: + return DP_AUX_ENUM_STR(DP_AUX_ERR_DEFER); + case DP_AUX_ERR_NACK_DEFER: + return DP_AUX_ENUM_STR(DP_AUX_ERR_NACK_DEFER); + default: + return "unknown"; + } +} + +static u32 dp_aux_write(struct dp_aux_private *aux, + struct drm_dp_aux_msg *msg) +{ + u32 data[4], reg, len; + u8 *msgdata = msg->buffer; + int const AUX_CMD_FIFO_LEN = 128; + int i = 0; + + if (aux->read) + len = 4; + else + len = msg->size + 4; + + /* + * cmd fifo only has depth of 144 bytes + * limit buf length to 128 bytes here + */ + if (len > AUX_CMD_FIFO_LEN) { + DRM_ERROR("buf size greater than allowed size of 128 bytes\n"); + return 0; + } + + /* Pack cmd and write to HW */ + data[0] = (msg->address >> 16) & 0xf; /* addr[19:16] */ + if (aux->read) + data[0] |= BIT(4); /* R/W */ + + data[1] = (msg->address >> 8) & 0xff; /* addr[15:8] */ + data[2] = msg->address & 0xff; /* addr[7:0] */ + data[3] = (msg->size - 1) & 0xff; /* len[7:0] */ + + for (i = 0; i < len; i++) { + reg = (i < 4) ? data[i] : msgdata[i - 4]; + /* index = 0, write */ + reg = (((reg) << DP_AUX_DATA_OFFSET) + & DP_AUX_DATA_MASK) | DP_AUX_DATA_WRITE; + if (i == 0) + reg |= DP_AUX_DATA_INDEX_WRITE; + aux->catalog->aux_data = reg; + dp_catalog_aux_write_data(aux->catalog); + } + + dp_catalog_aux_clear_trans(aux->catalog, false); + + reg = 0; /* Transaction number == 1 */ + if (!aux->native) { /* i2c */ + reg |= DP_AUX_TRANS_CTRL_I2C; + + if (aux->no_send_addr) + reg |= DP_AUX_TRANS_CTRL_NO_SEND_ADDR; + + if (aux->no_send_stop) + reg |= DP_AUX_TRANS_CTRL_NO_SEND_STOP; + } + + reg |= DP_AUX_TRANS_CTRL_GO; + aux->catalog->aux_data = reg; + dp_catalog_aux_write_trans(aux->catalog); + + return len; +} + +static int dp_aux_cmd_fifo_tx(struct dp_aux_private *aux, + struct drm_dp_aux_msg *msg) +{ + u32 ret, len, timeout; + int aux_timeout_ms = HZ/4; + + reinit_completion(&aux->comp); + + len = dp_aux_write(aux, msg); + if (len == 0) { + DRM_ERROR("DP AUX write failed\n"); + return -EINVAL; + } + + timeout = wait_for_completion_timeout(&aux->comp, aux_timeout_ms); + if (!timeout) { + DRM_ERROR("aux %s timeout\n", (aux->read ? "read" : "write")); + return -ETIMEDOUT; + } + + if (aux->aux_error_num == DP_AUX_ERR_NONE) { + ret = len; + } else { + DRM_ERROR_RATELIMITED("aux err: %s\n", + dp_aux_get_error(aux->aux_error_num)); + + ret = -EINVAL; + } + + return ret; +} + +static void dp_aux_cmd_fifo_rx(struct dp_aux_private *aux, + struct drm_dp_aux_msg *msg) +{ + u32 data; + u8 *dp; + u32 i, actual_i; + u32 len = msg->size; + + dp_catalog_aux_clear_trans(aux->catalog, true); + + data = DP_AUX_DATA_INDEX_WRITE; /* INDEX_WRITE */ + data |= DP_AUX_DATA_READ; /* read */ + + aux->catalog->aux_data = data; + dp_catalog_aux_write_data(aux->catalog); + + dp = msg->buffer; + + /* discard first byte */ + data = dp_catalog_aux_read_data(aux->catalog); + + for (i = 0; i < len; i++) { + data = dp_catalog_aux_read_data(aux->catalog); + *dp++ = (u8)((data >> DP_AUX_DATA_OFFSET) & 0xff); + + actual_i = (data >> DP_AUX_DATA_INDEX_OFFSET) & 0xFF; + if (i != actual_i) + DRM_ERROR("Index mismatch: expected %d, found %d\n", + i, actual_i); + } +} + +static void dp_aux_native_handler(struct dp_aux_private *aux) +{ + u32 isr = aux->isr; + + if (isr & DP_INTR_AUX_I2C_DONE) + aux->aux_error_num = DP_AUX_ERR_NONE; + else if (isr & DP_INTR_WRONG_ADDR) + aux->aux_error_num = DP_AUX_ERR_ADDR; + else if (isr & DP_INTR_TIMEOUT) + aux->aux_error_num = DP_AUX_ERR_TOUT; + if (isr & DP_INTR_NACK_DEFER) + aux->aux_error_num = DP_AUX_ERR_NACK; + + complete(&aux->comp); +} + +static void dp_aux_i2c_handler(struct dp_aux_private *aux) +{ + u32 isr = aux->isr; + + if (isr & DP_INTR_AUX_I2C_DONE) { + if (isr & (DP_INTR_I2C_NACK | DP_INTR_I2C_DEFER)) + aux->aux_error_num = DP_AUX_ERR_NACK; + else + aux->aux_error_num = DP_AUX_ERR_NONE; + } else { + if (isr & DP_INTR_WRONG_ADDR) + aux->aux_error_num = DP_AUX_ERR_ADDR; + else if (isr & DP_INTR_TIMEOUT) + aux->aux_error_num = DP_AUX_ERR_TOUT; + if (isr & DP_INTR_NACK_DEFER) + aux->aux_error_num = DP_AUX_ERR_NACK_DEFER; + if (isr & DP_INTR_I2C_NACK) + aux->aux_error_num = DP_AUX_ERR_NACK; + if (isr & DP_INTR_I2C_DEFER) + aux->aux_error_num = DP_AUX_ERR_DEFER; + } + + complete(&aux->comp); +} + +static void dp_aux_update_offset_and_segment(struct dp_aux_private *aux, + struct drm_dp_aux_msg *input_msg) +{ + u32 edid_address = 0x50; + u32 segment_address = 0x30; + bool i2c_read = input_msg->request & + (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ); + u8 *data; + + if (aux->native || i2c_read || ((input_msg->address != edid_address) && + (input_msg->address != segment_address))) + return; + + + data = input_msg->buffer; + if (input_msg->address == segment_address) + aux->segment = *data; + else + aux->offset = *data; +} + +/** + * dp_aux_transfer_helper() - helper function for EDID read transactions + * + * @aux: DP AUX private structure + * @input_msg: input message from DRM upstream APIs + * + * return: void + * + * This helper function is used to fix EDID reads for non-compliant + * sinks that do not handle the i2c middle-of-transaction flag correctly. + */ +static void dp_aux_transfer_helper(struct dp_aux_private *aux, + struct drm_dp_aux_msg *input_msg) +{ + struct drm_dp_aux_msg helper_msg; + u32 message_size = 0x10; + u32 segment_address = 0x30; + bool i2c_mot = input_msg->request & DP_AUX_I2C_MOT; + bool i2c_read = input_msg->request & + (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ); + + if (!i2c_mot || !i2c_read || (input_msg->size == 0)) + return; + + aux->read = false; + aux->cmd_busy = true; + aux->no_send_addr = true; + aux->no_send_stop = true; + + /* + * Send the segment address for every i2c read in which the + * middle-of-tranaction flag is set. This is required to support EDID + * reads of more than 2 blocks as the segment address is reset to 0 + * since we are overriding the middle-of-transaction flag for read + * transactions. + */ + memset(&helper_msg, 0, sizeof(helper_msg)); + helper_msg.address = segment_address; + helper_msg.buffer = &aux->segment; + helper_msg.size = 1; + dp_aux_cmd_fifo_tx(aux, &helper_msg); + + /* + * Send the offset address for every i2c read in which the + * middle-of-transaction flag is set. This will ensure that the sink + * will update its read pointer and return the correct portion of the + * EDID buffer in the subsequent i2c read trasntion triggered in the + * native AUX transfer function. + */ + memset(&helper_msg, 0, sizeof(helper_msg)); + helper_msg.address = input_msg->address; + helper_msg.buffer = &aux->offset; + helper_msg.size = 1; + dp_aux_cmd_fifo_tx(aux, &helper_msg); + aux->offset += message_size; + + if (aux->offset == 0x80 || aux->offset == 0x100) + aux->segment = 0x0; /* reset segment at end of block */ +} + +/* + * This function does the real job to process an AUX transaction. + * It will call aux_reset() function to reset the AUX channel, + * if the waiting is timeout. + */ +static ssize_t dp_aux_transfer(struct drm_dp_aux *drm_aux, + struct drm_dp_aux_msg *msg) +{ + ssize_t ret; + int const aux_cmd_native_max = 16; + int const aux_cmd_i2c_max = 128; + int const retry_count = 5; + struct dp_aux_private *aux = container_of(drm_aux, + struct dp_aux_private, drm_aux); + + mutex_lock(&aux->mutex); + + aux->native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ); + + /* Ignore address only message */ + if ((msg->size == 0) || (msg->buffer == NULL)) { + msg->reply = aux->native ? + DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK; + ret = msg->size; + goto unlock_exit; + } + + /* msg sanity check */ + if ((aux->native && (msg->size > aux_cmd_native_max)) || + (msg->size > aux_cmd_i2c_max)) { + DRM_ERROR("%s: invalid msg: size(%zu), request(%x)\n", + __func__, msg->size, msg->request); + ret = -EINVAL; + goto unlock_exit; + } + + dp_aux_update_offset_and_segment(aux, msg); + dp_aux_transfer_helper(aux, msg); + + aux->read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ); + aux->cmd_busy = true; + + if (aux->read) { + aux->no_send_addr = true; + aux->no_send_stop = false; + } else { + aux->no_send_addr = true; + aux->no_send_stop = true; + } + + ret = dp_aux_cmd_fifo_tx(aux, msg); + + if (ret < 0) { + if (aux->native) { + aux->retry_cnt++; + if (!(aux->retry_cnt % retry_count)) + dp_catalog_aux_update_cfg(aux->catalog, + aux->dp_aux.cfg, PHY_AUX_CFG1); + dp_catalog_aux_reset(aux->catalog); + } + goto unlock_exit; + } + + if (aux->aux_error_num == DP_AUX_ERR_NONE) { + if (aux->read) + dp_aux_cmd_fifo_rx(aux, msg); + + msg->reply = aux->native ? + DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK; + } else { + /* Reply defer to retry */ + msg->reply = aux->native ? + DP_AUX_NATIVE_REPLY_DEFER : DP_AUX_I2C_REPLY_DEFER; + } + + /* Return requested size for success or retry */ + ret = msg->size; + aux->retry_cnt = 0; + +unlock_exit: + aux->cmd_busy = false; + mutex_unlock(&aux->mutex); + return ret; +} + +static void dp_aux_reset_phy_config_indices(struct dp_aux_cfg *aux_cfg) +{ + int i; + + for (i = 0; i < PHY_AUX_CFG_MAX; i++) + aux_cfg[i].current_index = 0; +} + +void dp_aux_isr(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + + if (!dp_aux) { + DRM_ERROR("invalid input\n"); + return; + } + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + aux->isr = dp_catalog_aux_get_irq(aux->catalog); + + if (!aux->cmd_busy) + return; + + if (aux->native) + dp_aux_native_handler(aux); + else + dp_aux_i2c_handler(aux); +} + +void dp_aux_reconfig(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + dp_catalog_aux_update_cfg(aux->catalog, + dp_aux->cfg, PHY_AUX_CFG1); + dp_catalog_aux_reset(aux->catalog); +} + +void dp_aux_init(struct dp_aux *dp_aux, struct dp_aux_cfg *aux_cfg) +{ + struct dp_aux_private *aux; + + if (!dp_aux || !aux_cfg) { + DRM_ERROR("invalid input\n"); + return; + } + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + dp_aux_reset_phy_config_indices(aux_cfg); + dp_catalog_aux_setup(aux->catalog, aux_cfg); + dp_catalog_aux_reset(aux->catalog); + dp_catalog_aux_enable(aux->catalog, true); + aux->retry_cnt = 0; +} + +void dp_aux_deinit(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + dp_catalog_aux_enable(aux->catalog, false); +} + +int dp_aux_register(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + int ret; + + if (!dp_aux) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + aux->drm_aux.name = "dpu_dp_aux"; + aux->drm_aux.dev = aux->dev; + aux->drm_aux.transfer = dp_aux_transfer; + ret = drm_dp_aux_register(&aux->drm_aux); + if (ret) { + DRM_ERROR("%s: failed to register drm aux: %d\n", __func__, + ret); + return ret; + } + dp_aux->drm_aux = &aux->drm_aux; + + return 0; +} + +void dp_aux_unregister(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + drm_dp_aux_unregister(&aux->drm_aux); +} + +struct dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog, + struct dp_aux_cfg *aux_cfg) +{ + struct dp_aux_private *aux; + struct dp_aux *dp_aux; + + if (!catalog || !aux_cfg) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-ENODEV); + } + + aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL); + if (!aux) { + return ERR_PTR(-ENOMEM); + } + + init_completion(&aux->comp); + aux->cmd_busy = false; + mutex_init(&aux->mutex); + + aux->dev = dev; + aux->catalog = catalog; + aux->dp_aux.cfg = aux_cfg; + dp_aux = &aux->dp_aux; + aux->retry_cnt = 0; + + return dp_aux; +} + +void dp_aux_put(struct dp_aux *dp_aux) +{ + struct dp_aux_private *aux; + + if (!dp_aux) + return; + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + mutex_destroy(&aux->mutex); + + devm_kfree(aux->dev, aux); +} diff --git a/drivers/gpu/drm/msm/dp/dp_aux.h b/drivers/gpu/drm/msm/dp/dp_aux.h new file mode 100644 index 0000000..18f560b --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_aux.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_AUX_H_ +#define _DP_AUX_H_ + +#include "dp_catalog.h" +#include <drm/drm_dp_helper.h> + +#define DP_AUX_ERR_NONE 0 +#define DP_AUX_ERR_ADDR -1 +#define DP_AUX_ERR_TOUT -2 +#define DP_AUX_ERR_NACK -3 +#define DP_AUX_ERR_DEFER -4 +#define DP_AUX_ERR_NACK_DEFER -5 + +struct dp_aux { + struct drm_dp_aux *drm_aux; + struct dp_aux_cfg *cfg; +}; + +int dp_aux_register(struct dp_aux *aux); +void dp_aux_unregister(struct dp_aux *aux); +void dp_aux_isr(struct dp_aux *aux); +void dp_aux_init(struct dp_aux *aux, struct dp_aux_cfg *aux_cfg); +void dp_aux_deinit(struct dp_aux *aux); +void dp_aux_reconfig(struct dp_aux *aux); + +struct dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog, + struct dp_aux_cfg *aux_cfg); +void dp_aux_put(struct dp_aux *aux); + +#endif /*__DP_AUX_H_*/ diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c new file mode 100644 index 0000000..01e1833 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -0,0 +1,972 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/delay.h> +#include <linux/iopoll.h> +#include <drm/drm_dp_helper.h> + +#include "dp_catalog.h" +#include "dp_reg.h" + +#define POLLING_SLEEP_US 1000 +#define POLLING_TIMEOUT_US 10000 + +#define REFTIMER_DEFAULT_VALUE 0x20000 +#define SCRAMBLER_RESET_COUNT_VALUE 0xFC + +#define DP_INTERRUPT_STATUS_ACK_SHIFT 1 +#define DP_INTERRUPT_STATUS_MASK_SHIFT 2 + +#define DP_INTERRUPT_STATUS1 \ + (DP_INTR_AUX_I2C_DONE| \ + DP_INTR_WRONG_ADDR | DP_INTR_TIMEOUT | \ + DP_INTR_NACK_DEFER | DP_INTR_WRONG_DATA_CNT | \ + DP_INTR_I2C_NACK | DP_INTR_I2C_DEFER | \ + DP_INTR_PLL_UNLOCKED | DP_INTR_AUX_ERROR) + +#define DP_INTERRUPT_STATUS1_ACK \ + (DP_INTERRUPT_STATUS1 << DP_INTERRUPT_STATUS_ACK_SHIFT) +#define DP_INTERRUPT_STATUS1_MASK \ + (DP_INTERRUPT_STATUS1 << DP_INTERRUPT_STATUS_MASK_SHIFT) + +#define DP_INTERRUPT_STATUS2 \ + (DP_INTR_READY_FOR_VIDEO | DP_INTR_IDLE_PATTERN_SENT | \ + DP_INTR_FRAME_END | DP_INTR_CRC_UPDATED) + +#define DP_INTERRUPT_STATUS2_ACK \ + (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_ACK_SHIFT) +#define DP_INTERRUPT_STATUS2_MASK \ + (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) + +static u8 const vm_pre_emphasis[4][4] = { + {0x00, 0x0B, 0x12, 0xFF}, /* pe0, 0 db */ + {0x00, 0x0A, 0x12, 0xFF}, /* pe1, 3.5 db */ + {0x00, 0x0C, 0xFF, 0xFF}, /* pe2, 6.0 db */ + {0xFF, 0xFF, 0xFF, 0xFF} /* pe3, 9.5 db */ +}; + +/* voltage swing, 0.2v and 1.0v are not support */ +static u8 const vm_voltage_swing[4][4] = { + {0x07, 0x0F, 0x14, 0xFF}, /* sw0, 0.4v */ + {0x11, 0x1D, 0x1F, 0xFF}, /* sw1, 0.6 v */ + {0x18, 0x1F, 0xFF, 0xFF}, /* sw1, 0.8 v */ + {0xFF, 0xFF, 0xFF, 0xFF} /* sw1, 1.2 v, optional */ +}; + +static u8 const vm_pre_emphasis_hbr3_hbr2[4][4] = { + {0x00, 0x0C, 0x15, 0x1A}, + {0x02, 0x0E, 0x16, 0xFF}, + {0x02, 0x11, 0xFF, 0xFF}, + {0x04, 0xFF, 0xFF, 0xFF} +}; + +static u8 const vm_voltage_swing_hbr3_hbr2[4][4] = { + {0x02, 0x12, 0x16, 0x1A}, + {0x09, 0x19, 0x1F, 0xFF}, + {0x10, 0x1F, 0xFF, 0xFF}, + {0x1F, 0xFF, 0xFF, 0xFF} +}; + +static u8 const vm_pre_emphasis_hbr_rbr[4][4] = { + {0x00, 0x0C, 0x14, 0x19}, + {0x00, 0x0B, 0x12, 0xFF}, + {0x00, 0x0B, 0xFF, 0xFF}, + {0x04, 0xFF, 0xFF, 0xFF} +}; + +static u8 const vm_voltage_swing_hbr_rbr[4][4] = { + {0x08, 0x0F, 0x16, 0x1F}, + {0x11, 0x1E, 0x1F, 0xFF}, + {0x19, 0x1F, 0xFF, 0xFF}, + {0x1F, 0xFF, 0xFF, 0xFF} +}; + +struct dp_catalog_private { + struct device *dev; + struct dp_io *io; + struct dp_catalog dp_catalog; +}; + +static inline u32 dp_read_aux(struct dp_catalog_private *catalog, u32 offset) +{ + return readl_relaxed(catalog->io->dp_aux.base + offset); +} + +static inline void dp_write_aux(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure aux reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->dp_aux.base + offset); +} + +static inline u32 dp_read_ahb(struct dp_catalog_private *catalog, u32 offset) +{ + return readl_relaxed(catalog->io->dp_ahb.base + offset); +} + +static inline void dp_write_ahb(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure phy reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->dp_ahb.base + offset); +} + +static inline u32 dp_read_cc(struct dp_catalog_private *catalog, u32 offset) +{ + return readl_relaxed(catalog->io->dp_cc_io.base + offset); +} + +static inline void dp_write_phy(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure phy reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->phy_io.base + offset); +} + +static inline u32 dp_read_phy(struct dp_catalog_private *catalog, + u32 offset) +{ + /* + * To make sure phy reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + return readl_relaxed(catalog->io->phy_io.base + offset); +} + +static inline void dp_write_pll(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + writel_relaxed(data, catalog->io->dp_pll_io.base + offset); +} + +static inline void dp_write_ln_tx0(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + writel_relaxed(data, catalog->io->ln_tx0_io.base + offset); +} + +static inline void dp_write_ln_tx1(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + writel_relaxed(data, catalog->io->ln_tx1_io.base + offset); +} + +static inline u32 dp_read_ln_tx0(struct dp_catalog_private *catalog, + u32 offset) +{ + return readl_relaxed(catalog->io->ln_tx0_io.base + offset); +} + +static inline u32 dp_read_ln_tx1(struct dp_catalog_private *catalog, + u32 offset) +{ + return readl_relaxed(catalog->io->ln_tx1_io.base + offset); +} + +static inline void dp_write_usb_cm(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure usb reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->usb3_dp_com.base + offset); +} + +static inline u32 dp_read_usb_cm(struct dp_catalog_private *catalog, + u32 offset) +{ + /* + * To make sure usb reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + return readl_relaxed(catalog->io->usb3_dp_com.base + offset); +} + +static inline void dp_write_p0(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure interface reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->dp_p0.base + offset); +} + +static inline u32 dp_read_p0(struct dp_catalog_private *catalog, + u32 offset) +{ + /* + * To make sure interface reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + return readl_relaxed(catalog->io->dp_p0.base + offset); +} + +static inline u32 dp_read_link(struct dp_catalog_private *catalog, u32 offset) +{ + return readl_relaxed(catalog->io->dp_link.base + offset); +} + +static inline void dp_write_link(struct dp_catalog_private *catalog, + u32 offset, u32 data) +{ + /* + * To make sure link reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, catalog->io->dp_link.base + offset); +} + +/* aux related catalog functions */ +u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + return dp_read_aux(catalog, REG_DP_AUX_DATA); +} + +int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_aux(catalog, REG_DP_AUX_DATA, dp_catalog->aux_data); + return 0; +} + +int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, dp_catalog->aux_data); + return 0; +} + +int dp_catalog_aux_clear_trans(struct dp_catalog *dp_catalog, bool read) +{ + u32 data; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + if (read) { + data = dp_read_aux(catalog, REG_DP_AUX_TRANS_CTRL); + data &= ~DP_AUX_TRANS_CTRL_GO; + dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, data); + } else { + dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, 0); + } + return 0; +} + +void dp_catalog_aux_reset(struct dp_catalog *dp_catalog) +{ + u32 aux_ctrl; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + aux_ctrl = dp_read_aux(catalog, REG_DP_AUX_CTRL); + + aux_ctrl |= DP_AUX_CTRL_RESET; + dp_write_aux(catalog, REG_DP_AUX_CTRL, aux_ctrl); + usleep_range(1000, 1100); /* h/w recommended delay */ + + aux_ctrl &= ~DP_AUX_CTRL_RESET; + dp_write_aux(catalog, REG_DP_AUX_CTRL, aux_ctrl); +} + +void dp_catalog_aux_enable(struct dp_catalog *dp_catalog, bool enable) +{ + u32 aux_ctrl; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + aux_ctrl = dp_read_aux(catalog, REG_DP_AUX_CTRL); + + if (enable) { + dp_write_aux(catalog, REG_DP_TIMEOUT_COUNT, 0xffff); + dp_write_aux(catalog, REG_DP_AUX_LIMITS, 0xffff); + aux_ctrl |= DP_AUX_CTRL_ENABLE; + } else { + aux_ctrl &= ~DP_AUX_CTRL_ENABLE; + } + + dp_write_aux(catalog, REG_DP_AUX_CTRL, aux_ctrl); +} + +void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog, + struct dp_aux_cfg *cfg, enum dp_phy_aux_config_type type) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 new_index = 0, current_index = 0; + + if (type >= PHY_AUX_CFG_MAX) { + DRM_ERROR("invalid input\n"); + return; + } + + current_index = cfg[type].current_index; + new_index = (current_index + 1) % cfg[type].cfg_cnt; + DRM_DEBUG_DP("Updating %s from 0x%08x to 0x%08x\n", + dp_phy_aux_config_type_to_string(type), + cfg[type].lut[current_index], cfg[type].lut[new_index]); + + dp_write_phy(catalog, cfg[type].offset, + cfg[type].lut[new_index]); + cfg[type].current_index = new_index; +} + +void dump_regs(void * __iomem *base, int len) +{ + int i; + u32 x0, x4, x8, xc; + + len = DIV_ROUND_UP(len, 16); + for(i = 0; i < len; i += 16) { + x0 = readl_relaxed(base); + x4 = readl_relaxed(base + 0x04); + x8 = readl_relaxed(base + 0x08); + xc = readl_relaxed(base + 0x0c); + + pr_info("%08x: %08x %08x %08x %08x", base, x0, x4, x8, xc); + base += 16; + } +} + +void dp_catalog_dump_regs(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + pr_info("AHB regs\n"); + dump_regs(catalog->io->dp_ahb.base, catalog->io->dp_ahb.len); + + pr_info("AUXCLK regs\n"); + dump_regs(catalog->io->dp_aux.base, catalog->io->dp_aux.len); + + pr_info("LCLK regs\n"); + dump_regs(catalog->io->dp_link.base, catalog->io->dp_link.len); + + pr_info("P0CLK regs\n"); + dump_regs(catalog->io->dp_p0.base, catalog->io->dp_p0.len); + + pr_info("USB3 DP COM regs\n"); + dump_regs(catalog->io->usb3_dp_com.base, catalog->io->usb3_dp_com.len); + + pr_info("LN TX0 regs\n"); + dump_regs(catalog->io->ln_tx0_io.base, catalog->io->ln_tx0_io.len); + + pr_info("LN TX1 regs\n"); + dump_regs(catalog->io->ln_tx1_io.base, catalog->io->ln_tx1_io.len); + + pr_info("DP PHY regs\n"); + dump_regs(catalog->io->phy_io.base, catalog->io->phy_io.len); +} + +void dp_catalog_aux_setup(struct dp_catalog *dp_catalog, + struct dp_aux_cfg *cfg) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + int i = 0; + + dp_write_phy(catalog, REG_DP_PHY_PD_CTL, DP_PHY_PD_CTL_PWRDN | + DP_PHY_PD_CTL_AUX_PWRDN | DP_PHY_PD_CTL_PLL_PWRDN | + DP_PHY_PD_CTL_DP_CLAMP_EN); + + /* Turn on BIAS current for PHY/PLL */ + dp_write_pll(catalog, + QSERDES_COM_BIAS_EN_CLKBUFLR_EN, QSERDES_COM_BIAS_EN | + QSERDES_COM_BIAS_EN_MUX | QSERDES_COM_CLKBUF_L_EN | + QSERDES_COM_EN_SYSCLK_TX_SEL); + + dp_write_phy(catalog, REG_DP_PHY_PD_CTL, DP_PHY_PD_CTL_PSR_PWRDN); + + /* Make sure that hardware is done with PSR power down */ + wmb(); + dp_write_phy(catalog, REG_DP_PHY_PD_CTL, DP_PHY_PD_CTL_PWRDN | + DP_PHY_PD_CTL_AUX_PWRDN | DP_PHY_PD_CTL_LANE_0_1_PWRDN + | DP_PHY_PD_CTL_LANE_2_3_PWRDN | DP_PHY_PD_CTL_PLL_PWRDN + | DP_PHY_PD_CTL_DP_CLAMP_EN); + + dp_write_pll(catalog, + QSERDES_COM_BIAS_EN_CLKBUFLR_EN, QSERDES_COM_BIAS_EN | + QSERDES_COM_BIAS_EN_MUX | QSERDES_COM_CLKBUF_R_EN | + QSERDES_COM_CLKBUF_L_EN | QSERDES_COM_EN_SYSCLK_TX_SEL | + QSERDES_COM_CLKBUF_RX_DRIVE_L); + + /* DP AUX CFG register programming */ + for (i = 0; i < PHY_AUX_CFG_MAX; i++) { + DRM_DEBUG_DP("%s: offset=0x%08x, value=0x%08x\n", + dp_phy_aux_config_type_to_string(i), + cfg[i].offset, cfg[i].lut[cfg[i].current_index]); + dp_write_phy(catalog, cfg[i].offset, + cfg[i].lut[cfg[i].current_index]); + } + + dp_write_phy(catalog, REG_DP_PHY_AUX_INTERRUPT_MASK, + PHY_AUX_STOP_ERR_MASK | PHY_AUX_DEC_ERR_MASK | + PHY_AUX_SYNC_ERR_MASK | PHY_AUX_ALIGN_ERR_MASK | + PHY_AUX_REQ_ERR_MASK); +} + +int dp_catalog_aux_get_irq(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 intr, intr_ack; + + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS); + intr &= ~DP_INTERRUPT_STATUS1_MASK; + intr_ack = (intr & DP_INTERRUPT_STATUS1) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + dp_write_ahb(catalog, REG_DP_INTR_STATUS, intr_ack | + DP_INTERRUPT_STATUS1_MASK); + + return intr; + +} + +/* controller related catalog functions */ +void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, + u32 dp_tu, u32 valid_boundary, + u32 valid_boundary2) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_link(catalog, REG_DP_VALID_BOUNDARY, valid_boundary); + dp_write_link(catalog, REG_DP_TU, dp_tu); + dp_write_link(catalog, REG_DP_VALID_BOUNDARY_2, valid_boundary2); +} + +void dp_catalog_ctrl_state_ctrl(struct dp_catalog *dp_catalog, u32 state) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_link(catalog, REG_DP_STATE_CTRL, state); +} + +void dp_catalog_ctrl_config_ctrl(struct dp_catalog *dp_catalog, u32 cfg) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + DRM_DEBUG_DP("DP_CONFIGURATION_CTRL=0x%x\n", cfg); + + dp_write_link(catalog, REG_DP_CONFIGURATION_CTRL, cfg); +} + +void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 ln_0 = 0, ln_1 = 1, ln_2 = 2, ln_3 = 3; /* One-to-One mapping */ + u32 ln_mapping; + + ln_mapping = ln_0 << LANE0_MAPPING_SHIFT; + ln_mapping |= ln_1 << LANE1_MAPPING_SHIFT; + ln_mapping |= ln_2 << LANE2_MAPPING_SHIFT; + ln_mapping |= ln_3 << LANE3_MAPPING_SHIFT; + + dp_write_link(catalog, REG_DP_LOGICAL2PHYSICAL_LANE_MAPPING, + ln_mapping); +} + +void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, + bool enable) +{ + u32 mainlink_ctrl; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + if (enable) { + /* + * To make sure link reg writes happens before other operation, + * dp_write_link() function uses writel() + */ + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, + DP_MAINLINK_FB_BOUNDARY_SEL); + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, + DP_MAINLINK_FB_BOUNDARY_SEL | + DP_MAINLINK_CTRL_RESET); + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, + DP_MAINLINK_FB_BOUNDARY_SEL); + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, + DP_MAINLINK_FB_BOUNDARY_SEL | + DP_MAINLINK_CTRL_ENABLE); + } else { + mainlink_ctrl = dp_read_link(catalog, REG_DP_MAINLINK_CTRL); + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; + dp_write_link(catalog, REG_DP_MAINLINK_CTRL, mainlink_ctrl); + } +} + +void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, + u32 colorimetry_cfg, + u32 test_bits_depth) +{ + u32 misc_val; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + misc_val = dp_read_link(catalog, REG_DP_MISC1_MISC0); + misc_val |= colorimetry_cfg << DP_MISC0_COLORIMETRY_CFG_SHIFT; + misc_val |= test_bits_depth << DP_MISC0_TEST_BITS_DEPTH_SHIFT; + /* Configure clock to synchronous mode */ + misc_val |= DP_MISC0_SYNCHRONOUS_CLK; + + DRM_DEBUG_DP("misc settings = 0x%x\n", misc_val); + dp_write_link(catalog, REG_DP_MISC1_MISC0, misc_val); +} + +void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, + u32 rate, u32 stream_rate_khz, + bool fixed_nvid) +{ + u32 pixel_m, pixel_n; + u32 mvid, nvid; + u32 const nvid_fixed = DP_LINK_CONSTANT_N_VALUE; + u32 const link_rate_hbr2 = 540000; + u32 const link_rate_hbr3 = 810000; + + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + pixel_m = dp_read_cc(catalog, MMSS_DP_PIXEL_M); + pixel_n = dp_read_cc(catalog, MMSS_DP_PIXEL_N); + DRM_DEBUG_DP("pixel_m=0x%x, pixel_n=0x%x\n", pixel_m, pixel_n); + + mvid = (pixel_m & 0xFFFF) * 5; + nvid = (0xFFFF & (~pixel_n)) + (pixel_m & 0xFFFF); + + if (nvid < nvid_fixed) { + u32 temp; + + temp = (nvid_fixed / nvid) * nvid; + mvid = (nvid_fixed / nvid) * mvid; + nvid = temp; + } + + if (link_rate_hbr2 == rate) + nvid *= 2; + + if (link_rate_hbr3 == rate) + nvid *= 3; + + DRM_DEBUG_DP("mvid=0x%x, nvid=0x%x\n", mvid, nvid); + dp_write_link(catalog, REG_DP_SOFTWARE_MVID, mvid); + dp_write_link(catalog, REG_DP_SOFTWARE_NVID, nvid); + dp_write_p0(catalog, MMSS_DP_DSC_DTO, 0x0); +} + + +int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, + u32 pattern) +{ + int bit, ret; + u32 data; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + bit = BIT(pattern - 1); + DRM_DEBUG_DP("hw: bit=%d train=%d\n", bit, pattern); + dp_write_link(catalog, REG_DP_STATE_CTRL, bit); + + bit = BIT(pattern - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT; + + /* Poll for mainlink ready status */ + ret = readx_poll_timeout(readl, catalog->io->dp_link.base + + REG_DP_MAINLINK_READY, + data, data & bit, + POLLING_SLEEP_US, POLLING_TIMEOUT_US); + if (ret < 0) { + DRM_ERROR("set pattern for link_train=%d failed\n", pattern); + return ret; + } + return 0; +} + +void dp_catalog_ctrl_usb_reset(struct dp_catalog *dp_catalog, bool flip) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 typec_ctrl; + + dp_write_usb_cm(catalog, REG_USB3_DP_COM_RESET_OVRD_CTRL, + USB3_DP_COM_OVRD_CTRL_SW_DPPHY_RESET_MUX | + USB3_DP_COM_OVRD_CTRL_SW_USB3PHY_RESET_MUX); + dp_write_usb_cm(catalog, REG_USB3_DP_COM_PHY_MODE_CTRL, + USB3_DP_COM_PHY_MODE_DP); + dp_write_usb_cm(catalog, REG_USB3_DP_COM_SW_RESET, + USB3_DP_COM_SW_RESET_SET); + + /* Default configuration i.e CC1 */ + typec_ctrl = USB3_DP_COM_TYPEC_CTRL_PORTSEL_MUX; + if (flip) + typec_ctrl |= USB3_DP_COM_TYPEC_CTRL_PORTSEL; + + dp_write_usb_cm(catalog, REG_USB3_DP_COM_TYPEC_CTRL, typec_ctrl); + + dp_write_usb_cm(catalog, REG_USB3_DP_COM_SWI_CTRL, 0x00); + dp_write_usb_cm(catalog, REG_USB3_DP_COM_SW_RESET, 0x00); + + dp_write_usb_cm(catalog, REG_USB3_DP_COM_POWER_DOWN_CTRL, + USB3_DP_COM_POWER_DOWN_CTRL_SW_PWRDN); + dp_write_usb_cm(catalog, REG_USB3_DP_COM_RESET_OVRD_CTRL, 0x00); + +} + +void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog) +{ + u32 sw_reset; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + sw_reset = dp_read_ahb(catalog, REG_DP_SW_RESET); + + sw_reset |= DP_SW_RESET; + dp_write_ahb(catalog, REG_DP_SW_RESET, sw_reset); + usleep_range(1000, 1100); /* h/w recommended delay */ + + sw_reset &= ~DP_SW_RESET; + dp_write_ahb(catalog, REG_DP_SW_RESET, sw_reset); +} + +bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog) +{ + u32 data; + int ret; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + /* Poll for mainlink ready status */ + ret = readl_poll_timeout(catalog->io->dp_link.base + + REG_DP_MAINLINK_READY, + data, data & DP_MAINLINK_READY_FOR_VIDEO, + POLLING_SLEEP_US, POLLING_TIMEOUT_US); + if (ret < 0) { + DRM_ERROR("mainlink not ready\n"); + return false; + } + + return true; +} + +void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, + bool enable) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + if (enable) { + dp_write_ahb(catalog, REG_DP_INTR_STATUS, + DP_INTERRUPT_STATUS1_MASK); + dp_write_ahb(catalog, REG_DP_INTR_STATUS2, + DP_INTERRUPT_STATUS2_MASK); + } else { + dp_write_ahb(catalog, REG_DP_INTR_STATUS, 0x00); + dp_write_ahb(catalog, REG_DP_INTR_STATUS2, 0x00); + } +} + +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool en) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + if (en) { + u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER); + + dp_write_aux(catalog, REG_DP_DP_HPD_INT_ACK, + DP_DP_HPD_PLUG_INT_ACK | + DP_DP_IRQ_HPD_INT_ACK | + DP_DP_HPD_REPLUG_INT_ACK | + DP_DP_HPD_UNPLUG_INT_ACK); + dp_write_aux(catalog, REG_DP_DP_HPD_INT_MASK, + DP_DP_HPD_PLUG_INT_MASK | + DP_DP_IRQ_HPD_INT_MASK | + DP_DP_HPD_REPLUG_INT_MASK | + DP_DP_HPD_UNPLUG_INT_MASK); + + /* Configure REFTIMER */ + reftimer |= REFTIMER_DEFAULT_VALUE; + dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); + /* Enable HPD */ + dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, + DP_DP_HPD_CTRL_HPD_EN); + } else { + /* Disable HPD */ + dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, 0x0); + } +} + +int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 intr, intr_ack; + + intr = dp_read_ahb(catalog, REG_DP_INTR_STATUS2); + intr &= ~DP_INTERRUPT_STATUS2_MASK; + intr_ack = (intr & DP_INTERRUPT_STATUS2) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + dp_write_ahb(catalog, REG_DP_INTR_STATUS2, + intr_ack | DP_INTERRUPT_STATUS2_MASK); + + return intr; +} + +void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_ahb(catalog, REG_DP_PHY_CTRL, + DP_PHY_CTRL_SW_RESET_PLL | DP_PHY_CTRL_SW_RESET); + usleep_range(1000, 1100); /* h/w recommended delay */ + dp_write_ahb(catalog, REG_DP_PHY_CTRL, 0x0); +} + +void dp_catalog_ctrl_phy_lane_cfg(struct dp_catalog *dp_catalog, + bool flipped, u8 ln_cnt) +{ + u32 info; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u8 orientation = BIT(!!flipped); + + info = ln_cnt & DP_PHY_SPARE0_MASK; + info |= (orientation & DP_PHY_SPARE0_MASK) + << DP_PHY_SPARE0_ORIENTATION_INFO_SHIFT; + DRM_DEBUG_DP("Shared Info = 0x%x\n", info); + + dp_write_phy(catalog, REG_DP_PHY_SPARE0, info); +} + +int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, + u8 v_level, u8 p_level) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u8 voltage_swing_cfg, pre_emphasis_cfg; + + DRM_DEBUG_DP("hw: v=%d p=%d\n", v_level, p_level); + + voltage_swing_cfg = vm_voltage_swing_hbr_rbr[v_level][p_level]; + pre_emphasis_cfg = vm_pre_emphasis_hbr_rbr[v_level][p_level]; + + if (voltage_swing_cfg == 0xFF && pre_emphasis_cfg == 0xFF) { + DRM_ERROR("invalid vx (0x%x=0x%x), px (0x%x=0x%x\n", + v_level, voltage_swing_cfg, p_level, pre_emphasis_cfg); + return -EINVAL; + } + + /* Enable MUX to use Cursor values from these registers */ + voltage_swing_cfg |= DP_PHY_TXn_TX_DRV_LVL_MUX_EN; + pre_emphasis_cfg |= DP_PHY_TXn_TX_EMP_POST1_LVL_MUX_EN; + + /* Configure host and panel only if both values are allowed */ + dp_write_ln_tx0(catalog, REG_DP_PHY_TXn_TX_DRV_LVL, voltage_swing_cfg); + dp_write_ln_tx1(catalog, REG_DP_PHY_TXn_TX_DRV_LVL, voltage_swing_cfg); + dp_write_ln_tx0(catalog, REG_DP_PHY_TXn_TX_EMP_POST1_LVL, + pre_emphasis_cfg); + dp_write_ln_tx1(catalog, REG_DP_PHY_TXn_TX_EMP_POST1_LVL, + pre_emphasis_cfg); + DRM_DEBUG_DP("hw: vx_value=0x%x px_value=0x%x\n", + voltage_swing_cfg, pre_emphasis_cfg); + + return 0; +} + +void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog, + u32 pattern) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 value = 0x0; + + /* Make sure to clear the current pattern before starting a new one */ + dp_write_link(catalog, REG_DP_STATE_CTRL, 0x0); + + switch (pattern) { + case DP_LINK_QUAL_PATTERN_D10_2: + dp_write_link(catalog, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_TRAINING_PATTERN1); + return; + case DP_LINK_QUAL_PATTERN_PRBS7: + dp_write_link(catalog, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_PRBS7); + return; + case DP_LINK_QUAL_PATTERN_80BIT_CUSTOM: + dp_write_link(catalog, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_TEST_CUSTOM_PATTERN); + /* 00111110000011111000001111100000 */ + dp_write_link(catalog, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG0, + 0x3E0F83E0); + /* 00001111100000111110000011111000 */ + dp_write_link(catalog, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG1, + 0x0F83E0F8); + /* 1111100000111110 */ + dp_write_link(catalog, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG2, + 0x0000F83E); + return; + case DP_LINK_QUAL_PATTERN_HBR2_EYE: + case DP_LINK_QUAL_PATTERN_ERROR_RATE: + value &= ~DP_HBR2_ERM_PATTERN; + if (pattern == DP_LINK_QUAL_PATTERN_HBR2_EYE) + value = DP_HBR2_ERM_PATTERN; + dp_write_link(catalog, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + value |= SCRAMBLER_RESET_COUNT_VALUE; + dp_write_link(catalog, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + dp_write_link(catalog, REG_DP_MAINLINK_LEVELS, + DP_MAINLINK_SAFE_TO_EXIT_LEVEL_2); + dp_write_link(catalog, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_SYMBOL_ERR_MEASURE); + return; + default: + DRM_DEBUG_DP("No valid test pattern requested:0x%x\n", pattern); + return; + } +} + +u32 dp_catalog_ctrl_read_phy_pattern(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + return dp_read_link(catalog, REG_DP_MAINLINK_READY); +} + +/* panel related catalog functions */ +int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_link(catalog, REG_DP_TOTAL_HOR_VER, + dp_catalog->total); + dp_write_link(catalog, REG_DP_START_HOR_VER_FROM_SYNC, + dp_catalog->sync_start); + dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY, + dp_catalog->width_blanking); + dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active); + return 0; +} + +void dp_catalog_panel_tpg_enable(struct dp_catalog *dp_catalog, + struct drm_display_mode *drm_mode) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 hsync_period, vsync_period; + u32 display_v_start, display_v_end; + u32 hsync_start_x, hsync_end_x; + u32 v_sync_width; + u32 hsync_ctl; + u32 display_hctl; + + /* TPG config parameters*/ + hsync_period = drm_mode->htotal; + vsync_period = drm_mode->vtotal; + + display_v_start = ((drm_mode->vtotal - drm_mode->vsync_start) * + hsync_period); + display_v_end = ((vsync_period - (drm_mode->vsync_start - + drm_mode->vdisplay)) + * hsync_period) - 1; + + display_v_start += drm_mode->htotal - drm_mode->hsync_start; + display_v_end -= (drm_mode->hsync_start - drm_mode->hdisplay); + + hsync_start_x = drm_mode->htotal - drm_mode->hsync_start; + hsync_end_x = hsync_period - (drm_mode->hsync_start - + drm_mode->hdisplay) - 1; + + v_sync_width = drm_mode->vsync_end - drm_mode->vsync_start; + + hsync_ctl = (hsync_period << 16) | + (drm_mode->hsync_end - drm_mode->hsync_start); + display_hctl = (hsync_end_x << 16) | hsync_start_x; + + + dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, 0x0); + dp_write_p0(catalog, MMSS_DP_INTF_HSYNC_CTL, hsync_ctl); + dp_write_p0(catalog, MMSS_DP_INTF_VSYNC_PERIOD_F0, vsync_period * + hsync_period); + dp_write_p0(catalog, MMSS_DP_INTF_VSYNC_PULSE_WIDTH_F0, v_sync_width * + hsync_period); + dp_write_p0(catalog, MMSS_DP_INTF_VSYNC_PERIOD_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_VSYNC_PULSE_WIDTH_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_DISPLAY_HCTL, display_hctl); + dp_write_p0(catalog, MMSS_DP_INTF_ACTIVE_HCTL, 0); + dp_write_p0(catalog, MMSS_INTF_DISPLAY_V_START_F0, display_v_start); + dp_write_p0(catalog, MMSS_DP_INTF_DISPLAY_V_END_F0, display_v_end); + dp_write_p0(catalog, MMSS_INTF_DISPLAY_V_START_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_DISPLAY_V_END_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_ACTIVE_V_START_F0, 0); + dp_write_p0(catalog, MMSS_DP_INTF_ACTIVE_V_END_F0, 0); + dp_write_p0(catalog, MMSS_DP_INTF_ACTIVE_V_START_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_ACTIVE_V_END_F1, 0); + dp_write_p0(catalog, MMSS_DP_INTF_POLARITY_CTL, 0); + + dp_write_p0(catalog, MMSS_DP_TPG_MAIN_CONTROL, + DP_TPG_CHECKERED_RECT_PATTERN); + dp_write_p0(catalog, MMSS_DP_TPG_VIDEO_CONFIG, + DP_TPG_VIDEO_CONFIG_BPP_8BIT | + DP_TPG_VIDEO_CONFIG_RGB); + dp_write_p0(catalog, MMSS_DP_BIST_ENABLE, + DP_BIST_ENABLE_DPBIST_EN); + dp_write_p0(catalog, MMSS_DP_TIMING_ENGINE_EN, + DP_TIMING_ENGINE_EN_EN); + DRM_DEBUG_DP("%s: enabled tpg\n", __func__); +} + +void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + dp_write_p0(catalog, MMSS_DP_TPG_MAIN_CONTROL, 0x0); + dp_write_p0(catalog, MMSS_DP_BIST_ENABLE, 0x0); + dp_write_p0(catalog, MMSS_DP_TIMING_ENGINE_EN, 0x0); +} + +struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io) +{ + struct dp_catalog_private *catalog; + + if (!io) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + catalog = devm_kzalloc(dev, sizeof(*catalog), GFP_KERNEL); + if (!catalog) { + return ERR_PTR(-ENOMEM); + } + + catalog->dev = dev; + catalog->io = io; + + return &catalog->dp_catalog; +} diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h new file mode 100644 index 0000000..86b82d4 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_CATALOG_H_ +#define _DP_CATALOG_H_ + +#include "dp_parser.h" + +/* interrupts */ +#define DP_INTR_HPD BIT(0) +#define DP_INTR_AUX_I2C_DONE BIT(3) +#define DP_INTR_WRONG_ADDR BIT(6) +#define DP_INTR_TIMEOUT BIT(9) +#define DP_INTR_NACK_DEFER BIT(12) +#define DP_INTR_WRONG_DATA_CNT BIT(15) +#define DP_INTR_I2C_NACK BIT(18) +#define DP_INTR_I2C_DEFER BIT(21) +#define DP_INTR_PLL_UNLOCKED BIT(24) +#define DP_INTR_AUX_ERROR BIT(27) + +#define DP_INTR_READY_FOR_VIDEO BIT(0) +#define DP_INTR_IDLE_PATTERN_SENT BIT(3) +#define DP_INTR_FRAME_END BIT(6) +#define DP_INTR_CRC_UPDATED BIT(9) + +struct dp_catalog { + u32 aux_data; + u32 total; + u32 sync_start; + u32 width_blanking; + u32 dp_active; +}; + +/* AUX APIs */ +u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog); +int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog); +int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog); +int dp_catalog_aux_clear_trans(struct dp_catalog *dp_catalog, bool read); +void dp_catalog_aux_reset(struct dp_catalog *dp_catalog); +void dp_catalog_aux_enable(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog, + struct dp_aux_cfg *cfg, + enum dp_phy_aux_config_type type); +void dp_catalog_aux_setup(struct dp_catalog *dp_catalog, + struct dp_aux_cfg *aux_cfg); +int dp_catalog_aux_get_irq(struct dp_catalog *dp_catalog); + +/* DP Controller APIs */ +void dp_catalog_ctrl_state_ctrl(struct dp_catalog *dp_catalog, u32 state); +void dp_catalog_ctrl_config_ctrl(struct dp_catalog *dp_catalog, u32 config); +void dp_catalog_ctrl_lane_mapping(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb); +void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, + u32 stream_rate_khz, bool fixed_nvid); +int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, u32 pattern); +void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_usb_reset(struct dp_catalog *dp_catalog, bool flip); +bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool enable); +void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_phy_lane_cfg(struct dp_catalog *dp_catalog, bool flipped, + u8 lane_cnt); +int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, + u8 p_level); +int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog, + u32 dp_tu, u32 valid_boundary, + u32 valid_boundary2); +void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog, + u32 pattern); +u32 dp_catalog_ctrl_read_phy_pattern(struct dp_catalog *dp_catalog); + +/* DP Panel APIs */ +int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog); +void dp_catalog_dump_regs(struct dp_catalog *dp_catalog); +void dp_catalog_panel_tpg_enable(struct dp_catalog *dp_catalog, + struct drm_display_mode *drm_mode); +void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog); + +struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io); + +#endif /* _DP_CATALOG_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c new file mode 100644 index 0000000..aaa7bc8 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -0,0 +1,1707 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/types.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <drm/drm_fixed.h> +#include <drm/drm_dp_helper.h> + +#include "dp_reg.h" +#include "dp_ctrl.h" +#include "dp_link.h" + +#define DP_KHZ_TO_HZ 1000 +#define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */ +#define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) + +#define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) +#define DP_CTRL_INTR_IDLE_PATTERN_SENT BIT(3) + +#define MR_LINK_TRAINING1 0x8 +#define MR_LINK_SYMBOL_ERM 0x80 +#define MR_LINK_PRBS7 0x100 +#define MR_LINK_CUSTOM80 0x200 + +struct dp_tu_calc_input { + u64 lclk; /* 162, 270, 540 and 810 */ + u64 pclk_khz; /* in KHz */ + u64 hactive; /* active h-width */ + u64 hporch; /* bp + fp + pulse */ + int nlanes; /* no.of.lanes */ + int bpp; /* bits */ + int pixel_enc; /* 444, 420, 422 */ + int dsc_en; /* dsc on/off */ + int async_en; /* async mode */ + int fec_en; /* fec */ + int compress_ratio; /* 2:1 = 200, 3:1 = 300, 3.75:1 = 375 */ + int num_of_dsc_slices; /* number of slices per line */ +}; + +struct dp_vc_tu_mapping_table { + u32 vic; + u8 lanes; + u8 lrate; /* DP_LINK_RATE -> 162(6), 270(10), 540(20), 810 (30) */ + u8 bpp; + u8 valid_boundary_link; + u16 delay_start_link; + bool boundary_moderation_en; + u8 valid_lower_boundary_link; + u8 upper_boundary_count; + u8 lower_boundary_count; + u8 tu_size_minus1; +}; + +struct dp_ctrl_private { + struct dp_ctrl dp_ctrl; + + struct device *dev; + struct dp_aux *aux; + struct dp_panel *panel; + struct dp_link *link; + struct dp_power *power; + struct dp_parser *parser; + struct dp_catalog *catalog; + + struct completion idle_comp; + struct mutex push_idle_mutex; + struct completion video_comp; +}; + +static int dp_aux_link_configure(struct drm_dp_aux *aux, + struct dp_link_info *link) +{ + u8 values[2]; + int err; + + values[0] = drm_dp_link_rate_to_bw_code(link->rate); + values[1] = link->num_lanes; + + if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING) + values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; + + err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values)); + if (err < 0) + return err; + + return 0; +} + +void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + mutex_lock(&ctrl->push_idle_mutex); + + reinit_completion(&ctrl->idle_comp); + dp_catalog_ctrl_state_ctrl(ctrl->catalog, DP_STATE_CTRL_PUSH_IDLE); + + if (!wait_for_completion_timeout(&ctrl->idle_comp, + IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES)) + pr_warn("PUSH_IDLE pattern timedout\n"); + + mutex_unlock(&ctrl->push_idle_mutex); + pr_debug("mainlink off done\n"); +} + +static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) +{ + u32 config = 0, tbd; + u8 *dpcd = ctrl->panel->dpcd; + + /* Default-> LSCLK DIV: 1/4 LCLK */ + config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT); + + /* Scrambler reset enable */ + if (dpcd[DP_EDP_CONFIGURATION_CAP] & DP_ALTERNATE_SCRAMBLER_RESET_CAP) + config |= DP_CONFIGURATION_CTRL_ASSR; + + tbd = dp_link_get_test_bits_depth(ctrl->link, + ctrl->panel->dp_mode.bpp); + + if (tbd == DP_TEST_BIT_DEPTH_UNKNOWN) { + pr_debug("BIT_DEPTH not set. Configure default\n"); + tbd = DP_TEST_BIT_DEPTH_8; + } + + config |= tbd << DP_CONFIGURATION_CTRL_BPC_SHIFT; + + /* Num of Lanes */ + config |= ((ctrl->link->link_params.num_lanes - 1) + << DP_CONFIGURATION_CTRL_NUM_OF_LANES_SHIFT); + + if (drm_dp_enhanced_frame_cap(dpcd)) + config |= DP_CONFIGURATION_CTRL_ENHANCED_FRAMING; + + config |= DP_CONFIGURATION_CTRL_P_INTERLACED; /* progressive video */ + + /* sync clock & static Mvid */ + config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; + config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; + + dp_catalog_ctrl_config_ctrl(ctrl->catalog, config); +} + +static void dp_ctrl_configure_source_params(struct dp_ctrl_private *ctrl) +{ + u32 cc, tb; + + dp_catalog_ctrl_lane_mapping(ctrl->catalog); + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, true); + + dp_ctrl_config_ctrl(ctrl); + + tb = dp_link_get_test_bits_depth(ctrl->link, + ctrl->panel->dp_mode.bpp); + cc = dp_link_get_colorimetry_config(ctrl->link); + dp_catalog_ctrl_config_misc(ctrl->catalog, cc, tb); + dp_panel_timing_cfg(ctrl->panel); +} + +/* + * The structure and few functions present below are IP/Hardware + * specific implementation. Most of the implementation will not + * have coding comments + */ +struct tu_algo_data { + s64 lclk_fp; + s64 pclk_fp; + s64 lwidth; + s64 lwidth_fp; + s64 hbp_relative_to_pclk; + s64 hbp_relative_to_pclk_fp; + int nlanes; + int bpp; + int pixelEnc; + int dsc_en; + int async_en; + int bpc; + + uint delay_start_link_extra_pixclk; + int extra_buffer_margin; + s64 ratio_fp; + s64 original_ratio_fp; + + s64 err_fp; + s64 n_err_fp; + s64 n_n_err_fp; + int tu_size; + int tu_size_desired; + int tu_size_minus1; + + int valid_boundary_link; + s64 resulting_valid_fp; + s64 total_valid_fp; + s64 effective_valid_fp; + s64 effective_valid_recorded_fp; + int n_tus; + int n_tus_per_lane; + int paired_tus; + int remainder_tus; + int remainder_tus_upper; + int remainder_tus_lower; + int extra_bytes; + int filler_size; + int delay_start_link; + + int extra_pclk_cycles; + int extra_pclk_cycles_in_link_clk; + s64 ratio_by_tu_fp; + s64 average_valid2_fp; + int new_valid_boundary_link; + int remainder_symbols_exist; + int n_symbols; + s64 n_remainder_symbols_per_lane_fp; + s64 last_partial_tu_fp; + s64 TU_ratio_err_fp; + + int n_tus_incl_last_incomplete_tu; + int extra_pclk_cycles_tmp; + int extra_pclk_cycles_in_link_clk_tmp; + int extra_required_bytes_new_tmp; + int filler_size_tmp; + int lower_filler_size_tmp; + int delay_start_link_tmp; + + bool boundary_moderation_en; + int boundary_mod_lower_err; + int upper_boundary_count; + int lower_boundary_count; + int i_upper_boundary_count; + int i_lower_boundary_count; + int valid_lower_boundary_link; + int even_distribution_BF; + int even_distribution_legacy; + int even_distribution; + int min_hblank_violated; + s64 delay_start_time_fp; + s64 hbp_time_fp; + s64 hactive_time_fp; + s64 diff_abs_fp; + + s64 ratio; +}; + +static int _tu_param_compare(s64 a, s64 b) +{ + u32 a_int, a_frac, a_sign; + u32 b_int, b_frac, b_sign; + s64 a_temp, b_temp, minus_1; + + if (a == b) + return 0; + + minus_1 = drm_fixp_from_fraction(-1, 1); + + a_int = (a >> 32) & 0x7FFFFFFF; + a_frac = a & 0xFFFFFFFF; + a_sign = (a >> 32) & 0x80000000 ? 1 : 0; + + b_int = (b >> 32) & 0x7FFFFFFF; + b_frac = b & 0xFFFFFFFF; + b_sign = (b >> 32) & 0x80000000 ? 1 : 0; + + if (a_sign > b_sign) + return 2; + else if (b_sign > a_sign) + return 1; + + if (!a_sign && !b_sign) { /* positive */ + if (a > b) + return 1; + else + return 2; + } else { /* negative */ + a_temp = drm_fixp_mul(a, minus_1); + b_temp = drm_fixp_mul(b, minus_1); + + if (a_temp > b_temp) + return 2; + else + return 1; + } +} + +static void dp_panel_update_tu_timings(struct dp_tu_calc_input *in, + struct tu_algo_data *tu) +{ + int nlanes = in->nlanes; + int dsc_num_slices = in->num_of_dsc_slices; + int dsc_num_bytes = 0; + int numerator; + s64 pclk_dsc_fp; + s64 dwidth_dsc_fp; + s64 hbp_dsc_fp; + s64 overhead_dsc; + + int tot_num_eoc_symbols = 0; + int tot_num_hor_bytes = 0; + int tot_num_dummy_bytes = 0; + int dwidth_dsc_bytes = 0; + int eoc_bytes = 0; + + s64 temp1_fp, temp2_fp, temp3_fp; + + tu->lclk_fp = drm_fixp_from_fraction(in->lclk, 1); + tu->pclk_fp = drm_fixp_from_fraction(in->pclk_khz, 1000); + tu->lwidth = in->hactive; + tu->hbp_relative_to_pclk = in->hporch; + tu->nlanes = in->nlanes; + tu->bpp = in->bpp; + tu->pixelEnc = in->pixel_enc; + tu->dsc_en = in->dsc_en; + tu->async_en = in->async_en; + tu->lwidth_fp = drm_fixp_from_fraction(in->hactive, 1); + tu->hbp_relative_to_pclk_fp = drm_fixp_from_fraction(in->hporch, 1); + + if (tu->pixelEnc == 420) { + temp1_fp = drm_fixp_from_fraction(2, 1); + tu->pclk_fp = drm_fixp_div(tu->pclk_fp, temp1_fp); + tu->lwidth_fp = drm_fixp_div(tu->lwidth_fp, temp1_fp); + tu->hbp_relative_to_pclk_fp = + drm_fixp_div(tu->hbp_relative_to_pclk_fp, 2); + } + + if (tu->pixelEnc == 422) { + switch (tu->bpp) { + case 24: + tu->bpp = 16; + tu->bpc = 8; + break; + case 30: + tu->bpp = 20; + tu->bpc = 10; + break; + default: + tu->bpp = 16; + tu->bpc = 8; + break; + } + } else { + tu->bpc = tu->bpp/3; + } + + if (!in->dsc_en) + goto fec_check; + + temp1_fp = drm_fixp_from_fraction(in->compress_ratio, 100); + temp2_fp = drm_fixp_from_fraction(in->bpp, 1); + temp3_fp = drm_fixp_div(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_mul(tu->lwidth_fp, temp3_fp); + + temp1_fp = drm_fixp_from_fraction(8, 1); + temp3_fp = drm_fixp_div(temp2_fp, temp1_fp); + + numerator = drm_fixp2int(temp3_fp); + + dsc_num_bytes = numerator / dsc_num_slices; + eoc_bytes = dsc_num_bytes % nlanes; + tot_num_eoc_symbols = nlanes * dsc_num_slices; + tot_num_hor_bytes = dsc_num_bytes * dsc_num_slices; + tot_num_dummy_bytes = (nlanes - eoc_bytes) * dsc_num_slices; + + if (dsc_num_bytes == 0) + pr_info("incorrect no of bytes per slice=%d\n", dsc_num_bytes); + + dwidth_dsc_bytes = (tot_num_hor_bytes + + tot_num_eoc_symbols + + (eoc_bytes == 0 ? 0 : tot_num_dummy_bytes)); + overhead_dsc = dwidth_dsc_bytes / tot_num_hor_bytes; + + dwidth_dsc_fp = drm_fixp_from_fraction(dwidth_dsc_bytes, 3); + + temp2_fp = drm_fixp_mul(tu->pclk_fp, dwidth_dsc_fp); + temp1_fp = drm_fixp_div(temp2_fp, tu->lwidth_fp); + pclk_dsc_fp = temp1_fp; + + temp1_fp = drm_fixp_div(pclk_dsc_fp, tu->pclk_fp); + temp2_fp = drm_fixp_mul(tu->hbp_relative_to_pclk_fp, temp1_fp); + hbp_dsc_fp = temp2_fp; + + /* output */ + tu->pclk_fp = pclk_dsc_fp; + tu->lwidth_fp = dwidth_dsc_fp; + tu->hbp_relative_to_pclk_fp = hbp_dsc_fp; + +fec_check: + if (in->fec_en) { + temp1_fp = drm_fixp_from_fraction(976, 1000); /* 0.976 */ + tu->lclk_fp = drm_fixp_mul(tu->lclk_fp, temp1_fp); + } +} + +static void _tu_valid_boundary_calc(struct tu_algo_data *tu) +{ + s64 temp1_fp, temp2_fp, temp, temp1, temp2; + int compare_result_1, compare_result_2, compare_result_3; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + + tu->new_valid_boundary_link = drm_fixp2int_ceil(temp2_fp); + + temp = (tu->i_upper_boundary_count * + tu->new_valid_boundary_link + + tu->i_lower_boundary_count * + (tu->new_valid_boundary_link-1)); + tu->average_valid2_fp = drm_fixp_from_fraction(temp, + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count)); + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = tu->lwidth_fp; + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp); + tu->n_tus = drm_fixp2int(temp2_fp); + if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000) + tu->n_tus += 1; + + temp1_fp = drm_fixp_from_fraction(tu->n_tus, 1); + temp2_fp = drm_fixp_mul(temp1_fp, tu->average_valid2_fp); + temp1_fp = drm_fixp_from_fraction(tu->n_symbols, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(tu->nlanes, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu->n_remainder_symbols_per_lane_fp = temp2_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + tu->last_partial_tu_fp = + drm_fixp_div(tu->n_remainder_symbols_per_lane_fp, + temp1_fp); + + if (tu->n_remainder_symbols_per_lane_fp != 0) + tu->remainder_symbols_exist = 1; + else + tu->remainder_symbols_exist = 0; + + temp1_fp = drm_fixp_from_fraction(tu->n_tus, tu->nlanes); + tu->n_tus_per_lane = drm_fixp2int(temp1_fp); + + tu->paired_tus = (int)((tu->n_tus_per_lane) / + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count)); + + tu->remainder_tus = tu->n_tus_per_lane - tu->paired_tus * + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count); + + if ((tu->remainder_tus - tu->i_upper_boundary_count) > 0) { + tu->remainder_tus_upper = tu->i_upper_boundary_count; + tu->remainder_tus_lower = tu->remainder_tus - + tu->i_upper_boundary_count; + } else { + tu->remainder_tus_upper = tu->remainder_tus; + tu->remainder_tus_lower = 0; + } + + temp = tu->paired_tus * (tu->i_upper_boundary_count * + tu->new_valid_boundary_link + + tu->i_lower_boundary_count * + (tu->new_valid_boundary_link - 1)) + + (tu->remainder_tus_upper * + tu->new_valid_boundary_link) + + (tu->remainder_tus_lower * + (tu->new_valid_boundary_link - 1)); + tu->total_valid_fp = drm_fixp_from_fraction(temp, 1); + + if (tu->remainder_symbols_exist) { + temp1_fp = tu->total_valid_fp + + tu->n_remainder_symbols_per_lane_fp; + temp2_fp = drm_fixp_from_fraction(tu->n_tus_per_lane, 1); + temp2_fp = temp2_fp + tu->last_partial_tu_fp; + temp1_fp = drm_fixp_div(temp1_fp, temp2_fp); + } else { + temp2_fp = drm_fixp_from_fraction(tu->n_tus_per_lane, 1); + temp1_fp = drm_fixp_div(tu->total_valid_fp, temp2_fp); + } + tu->effective_valid_fp = temp1_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + tu->n_n_err_fp = tu->effective_valid_fp - temp2_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + tu->n_err_fp = tu->average_valid2_fp - temp2_fp; + + tu->even_distribution = tu->n_tus % tu->nlanes == 0 ? 1 : 0; + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = tu->lwidth_fp; + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp); + + if (temp2_fp) + tu->n_tus_incl_last_incomplete_tu = drm_fixp2int_ceil(temp2_fp); + else + tu->n_tus_incl_last_incomplete_tu = 0; + + temp1 = 0; + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = tu->average_valid2_fp - temp2_fp; + temp2_fp = drm_fixp_from_fraction(tu->n_tus_incl_last_incomplete_tu, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + temp1 = drm_fixp2int_ceil(temp1_fp); + + temp = tu->i_upper_boundary_count * tu->nlanes; + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu->new_valid_boundary_link, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(temp, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp2_fp) + temp2 = drm_fixp2int_ceil(temp2_fp); + else + temp2 = 0; + tu->extra_required_bytes_new_tmp = (int)(temp1 + temp2); + + temp1_fp = drm_fixp_from_fraction(8, tu->bpp); + temp2_fp = drm_fixp_from_fraction( + tu->extra_required_bytes_new_tmp, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu->extra_pclk_cycles_tmp = drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles_tmp = 0; + + temp1_fp = drm_fixp_from_fraction(tu->extra_pclk_cycles_tmp, 1); + temp2_fp = drm_fixp_div(tu->lclk_fp, tu->pclk_fp); + temp1_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp1_fp) + tu->extra_pclk_cycles_in_link_clk_tmp = + drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles_in_link_clk_tmp = 0; + + tu->filler_size_tmp = tu->tu_size - tu->new_valid_boundary_link; + + tu->lower_filler_size_tmp = tu->filler_size_tmp + 1; + + tu->delay_start_link_tmp = tu->extra_pclk_cycles_in_link_clk_tmp + + tu->lower_filler_size_tmp + + tu->extra_buffer_margin; + + temp1_fp = drm_fixp_from_fraction(tu->delay_start_link_tmp, 1); + tu->delay_start_time_fp = drm_fixp_div(temp1_fp, tu->lclk_fp); + + compare_result_1 = _tu_param_compare(tu->n_n_err_fp, tu->diff_abs_fp); + if (compare_result_1 == 2) + compare_result_1 = 1; + else + compare_result_1 = 0; + + compare_result_2 = _tu_param_compare(tu->n_n_err_fp, tu->err_fp); + if (compare_result_2 == 2) + compare_result_2 = 1; + else + compare_result_2 = 0; + + compare_result_3 = _tu_param_compare(tu->hbp_time_fp, + tu->delay_start_time_fp); + if (compare_result_3 == 2) + compare_result_3 = 0; + else + compare_result_3 = 1; + + if (((tu->even_distribution == 1) || + ((tu->even_distribution_BF == 0) && + (tu->even_distribution_legacy == 0))) && + tu->n_err_fp >= 0 && tu->n_n_err_fp >= 0 && + compare_result_2 && + (compare_result_1 || (tu->min_hblank_violated == 1)) && + (tu->new_valid_boundary_link - 1) > 0 && + compare_result_3 && + (tu->delay_start_link_tmp <= 1023)) { + tu->upper_boundary_count = tu->i_upper_boundary_count; + tu->lower_boundary_count = tu->i_lower_boundary_count; + tu->err_fp = tu->n_n_err_fp; + tu->boundary_moderation_en = true; + tu->tu_size_desired = tu->tu_size; + tu->valid_boundary_link = tu->new_valid_boundary_link; + tu->effective_valid_recorded_fp = tu->effective_valid_fp; + tu->even_distribution_BF = 1; + tu->delay_start_link = tu->delay_start_link_tmp; + } else if (tu->boundary_mod_lower_err == 0) { + compare_result_1 = _tu_param_compare(tu->n_n_err_fp, + tu->diff_abs_fp); + if (compare_result_1 == 2) + tu->boundary_mod_lower_err = 1; + } +} + +static void _dp_ctrl_calc_tu(struct dp_tu_calc_input *in, + struct dp_vc_tu_mapping_table *tu_table) +{ + struct tu_algo_data tu; + int compare_result_1, compare_result_2; + u64 temp = 0; + s64 temp_fp = 0, temp1_fp = 0, temp2_fp = 0; + + s64 LCLK_FAST_SKEW_fp = drm_fixp_from_fraction(6, 10000); /* 0.0006 */ + s64 const_p49_fp = drm_fixp_from_fraction(49, 100); /* 0.49 */ + s64 const_p56_fp = drm_fixp_from_fraction(56, 100); /* 0.56 */ + s64 RATIO_SCALE_fp = drm_fixp_from_fraction(1001, 1000); + + u8 DP_BRUTE_FORCE = 1; + s64 BRUTE_FORCE_THRESHOLD_fp = drm_fixp_from_fraction(1, 10); /* 0.1 */ + uint EXTRA_PIXCLK_CYCLE_DELAY = 4; + uint HBLANK_MARGIN = 4; + + memset(&tu, 0, sizeof(tu)); + + dp_panel_update_tu_timings(in, &tu); + + tu.err_fp = drm_fixp_from_fraction(1000, 1); /* 1000 */ + + temp1_fp = drm_fixp_from_fraction(4, 1); + temp2_fp = drm_fixp_mul(temp1_fp, tu.lclk_fp); + temp_fp = drm_fixp_div(temp2_fp, tu.pclk_fp); + tu.extra_buffer_margin = drm_fixp2int_ceil(temp_fp); + + temp1_fp = drm_fixp_from_fraction(tu.bpp, 8); + temp2_fp = drm_fixp_mul(tu.pclk_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu.nlanes, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu.ratio_fp = drm_fixp_div(temp2_fp, tu.lclk_fp); + + tu.original_ratio_fp = tu.ratio_fp; + tu.boundary_moderation_en = false; + tu.upper_boundary_count = 0; + tu.lower_boundary_count = 0; + tu.i_upper_boundary_count = 0; + tu.i_lower_boundary_count = 0; + tu.valid_lower_boundary_link = 0; + tu.even_distribution_BF = 0; + tu.even_distribution_legacy = 0; + tu.even_distribution = 0; + tu.delay_start_time_fp = 0; + + tu.err_fp = drm_fixp_from_fraction(1000, 1); + tu.n_err_fp = 0; + tu.n_n_err_fp = 0; + + tu.ratio = drm_fixp2int(tu.ratio_fp); + temp1_fp = drm_fixp_from_fraction(tu.nlanes, 1); + temp2_fp = tu.lwidth_fp % temp1_fp; + if (temp2_fp != 0 && + !tu.ratio && tu.dsc_en == 0) { + tu.ratio_fp = drm_fixp_mul(tu.ratio_fp, RATIO_SCALE_fp); + tu.ratio = drm_fixp2int(tu.ratio_fp); + if (tu.ratio) + tu.ratio_fp = drm_fixp_from_fraction(1, 1); + } + + if (tu.ratio > 1) + tu.ratio = 1; + + if (tu.ratio == 1) + goto tu_size_calc; + + compare_result_1 = _tu_param_compare(tu.ratio_fp, const_p49_fp); + if (!compare_result_1 || compare_result_1 == 1) + compare_result_1 = 1; + else + compare_result_1 = 0; + + compare_result_2 = _tu_param_compare(tu.ratio_fp, const_p56_fp); + if (!compare_result_2 || compare_result_2 == 2) + compare_result_2 = 1; + else + compare_result_2 = 0; + + if (tu.dsc_en && compare_result_1 && compare_result_2) { + HBLANK_MARGIN += 4; + DRM_DEBUG_DP("Info: increase HBLANK_MARGIN to %d\n", + HBLANK_MARGIN); + } + +tu_size_calc: + for (tu.tu_size = 32; tu.tu_size <= 64; tu.tu_size++) { + temp1_fp = drm_fixp_from_fraction(tu.tu_size, 1); + temp2_fp = drm_fixp_mul(tu.ratio_fp, temp1_fp); + temp = drm_fixp2int_ceil(temp2_fp); + temp1_fp = drm_fixp_from_fraction(temp, 1); + tu.n_err_fp = temp1_fp - temp2_fp; + + if (tu.n_err_fp < tu.err_fp) { + tu.err_fp = tu.n_err_fp; + tu.tu_size_desired = tu.tu_size; + } + } + + tu.tu_size_minus1 = tu.tu_size_desired - 1; + + temp1_fp = drm_fixp_from_fraction(tu.tu_size_desired, 1); + temp2_fp = drm_fixp_mul(tu.ratio_fp, temp1_fp); + tu.valid_boundary_link = drm_fixp2int_ceil(temp2_fp); + + temp1_fp = drm_fixp_from_fraction(tu.bpp, 8); + temp2_fp = tu.lwidth_fp; + temp2_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + temp1_fp = drm_fixp_from_fraction(tu.valid_boundary_link, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu.n_tus = drm_fixp2int(temp2_fp); + if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000) + tu.n_tus += 1; + + tu.even_distribution_legacy = tu.n_tus % tu.nlanes == 0 ? 1 : 0; + DRM_DEBUG_DP("Info: n_sym = %d, num_of_tus = %d\n", + tu.valid_boundary_link, tu.n_tus); + + temp1_fp = drm_fixp_from_fraction(tu.tu_size_desired, 1); + temp2_fp = drm_fixp_mul(tu.original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu.valid_boundary_link, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(tu.n_tus + 1, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + temp = drm_fixp2int(temp2_fp); + if (temp && temp2_fp) + tu.extra_bytes = drm_fixp2int_ceil(temp2_fp); + else + tu.extra_bytes = 0; + + temp1_fp = drm_fixp_from_fraction(tu.extra_bytes, 1); + temp2_fp = drm_fixp_from_fraction(8, tu.bpp); + temp1_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp && temp1_fp) + tu.extra_pclk_cycles = drm_fixp2int_ceil(temp1_fp); + else + tu.extra_pclk_cycles = drm_fixp2int(temp1_fp); + + temp1_fp = drm_fixp_div(tu.lclk_fp, tu.pclk_fp); + temp2_fp = drm_fixp_from_fraction(tu.extra_pclk_cycles, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu.extra_pclk_cycles_in_link_clk = drm_fixp2int_ceil(temp1_fp); + else + tu.extra_pclk_cycles_in_link_clk = drm_fixp2int(temp1_fp); + + tu.filler_size = tu.tu_size_desired - tu.valid_boundary_link; + + temp1_fp = drm_fixp_from_fraction(tu.tu_size_desired, 1); + tu.ratio_by_tu_fp = drm_fixp_mul(tu.ratio_fp, temp1_fp); + + tu.delay_start_link = tu.extra_pclk_cycles_in_link_clk + + tu.filler_size + tu.extra_buffer_margin; + + tu.resulting_valid_fp = + drm_fixp_from_fraction(tu.valid_boundary_link, 1); + + temp1_fp = drm_fixp_from_fraction(tu.tu_size_desired, 1); + temp2_fp = drm_fixp_div(tu.resulting_valid_fp, temp1_fp); + tu.TU_ratio_err_fp = temp2_fp - tu.original_ratio_fp; + + temp1_fp = drm_fixp_from_fraction(HBLANK_MARGIN, 1); + temp1_fp = tu.hbp_relative_to_pclk_fp - temp1_fp; + tu.hbp_time_fp = drm_fixp_div(temp1_fp, tu.pclk_fp); + + temp1_fp = drm_fixp_from_fraction(tu.delay_start_link, 1); + tu.delay_start_time_fp = drm_fixp_div(temp1_fp, tu.lclk_fp); + + compare_result_1 = _tu_param_compare(tu.hbp_time_fp, + tu.delay_start_time_fp); + if (compare_result_1 == 2) /* if (hbp_time_fp < delay_start_time_fp) */ + tu.min_hblank_violated = 1; + + tu.hactive_time_fp = drm_fixp_div(tu.lwidth_fp, tu.pclk_fp); + + compare_result_2 = _tu_param_compare(tu.hactive_time_fp, + tu.delay_start_time_fp); + if (compare_result_2 == 2) + tu.min_hblank_violated = 1; + + tu.delay_start_time_fp = 0; + + /* brute force */ + + tu.delay_start_link_extra_pixclk = EXTRA_PIXCLK_CYCLE_DELAY; + tu.diff_abs_fp = tu.resulting_valid_fp - tu.ratio_by_tu_fp; + + temp = drm_fixp2int(tu.diff_abs_fp); + if (!temp && tu.diff_abs_fp <= 0xffff) + tu.diff_abs_fp = 0; + + /* if(diff_abs < 0) diff_abs *= -1 */ + if (tu.diff_abs_fp < 0) + tu.diff_abs_fp = drm_fixp_mul(tu.diff_abs_fp, -1); + + tu.boundary_mod_lower_err = 0; + if ((tu.diff_abs_fp != 0 && + ((tu.diff_abs_fp > BRUTE_FORCE_THRESHOLD_fp) || + (tu.even_distribution_legacy == 0) || + (DP_BRUTE_FORCE == 1))) || + (tu.min_hblank_violated == 1)) { + do { + tu.err_fp = drm_fixp_from_fraction(1000, 1); + + temp1_fp = drm_fixp_div(tu.lclk_fp, tu.pclk_fp); + temp2_fp = drm_fixp_from_fraction( + tu.delay_start_link_extra_pixclk, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu.extra_buffer_margin = + drm_fixp2int_ceil(temp1_fp); + else + tu.extra_buffer_margin = 0; + + temp1_fp = drm_fixp_from_fraction(tu.bpp, 8); + temp1_fp = drm_fixp_mul(tu.lwidth_fp, temp1_fp); + + if (temp1_fp) + tu.n_symbols = drm_fixp2int_ceil(temp1_fp); + else + tu.n_symbols = 0; + + for (tu.tu_size = 32; tu.tu_size <= 64; tu.tu_size++) { + for (tu.i_upper_boundary_count = 1; + tu.i_upper_boundary_count <= 15; + tu.i_upper_boundary_count++) { + for (tu.i_lower_boundary_count = 1; + tu.i_lower_boundary_count <= 15; + tu.i_lower_boundary_count++) { + _tu_valid_boundary_calc(&tu); + } + } + } + tu.delay_start_link_extra_pixclk--; + } while (tu.boundary_moderation_en != true && + tu.boundary_mod_lower_err == 1 && + tu.delay_start_link_extra_pixclk != 0); + + if (tu.boundary_moderation_en == true) { + temp1_fp = drm_fixp_from_fraction( + (tu.upper_boundary_count * + tu.valid_boundary_link + + tu.lower_boundary_count * + (tu.valid_boundary_link - 1)), 1); + temp2_fp = drm_fixp_from_fraction( + (tu.upper_boundary_count + + tu.lower_boundary_count), 1); + tu.resulting_valid_fp = + drm_fixp_div(temp1_fp, temp2_fp); + + temp1_fp = drm_fixp_from_fraction( + tu.tu_size_desired, 1); + tu.ratio_by_tu_fp = + drm_fixp_mul(tu.original_ratio_fp, temp1_fp); + + tu.valid_lower_boundary_link = + tu.valid_boundary_link - 1; + + temp1_fp = drm_fixp_from_fraction(tu.bpp, 8); + temp1_fp = drm_fixp_mul(tu.lwidth_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, + tu.resulting_valid_fp); + tu.n_tus = drm_fixp2int(temp2_fp); + + tu.tu_size_minus1 = tu.tu_size_desired - 1; + tu.even_distribution_BF = 1; + + temp1_fp = + drm_fixp_from_fraction(tu.tu_size_desired, 1); + temp2_fp = + drm_fixp_div(tu.resulting_valid_fp, temp1_fp); + tu.TU_ratio_err_fp = temp2_fp - tu.original_ratio_fp; + } + } + + temp2_fp = drm_fixp_mul(LCLK_FAST_SKEW_fp, tu.lwidth_fp); + + if (temp2_fp) + temp = drm_fixp2int_ceil(temp2_fp); + else + temp = 0; + + temp1_fp = drm_fixp_from_fraction(tu.nlanes, 1); + temp2_fp = drm_fixp_mul(tu.original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu.bpp, 8); + temp2_fp = drm_fixp_div(temp1_fp, temp2_fp); + temp1_fp = drm_fixp_from_fraction(temp, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + temp = drm_fixp2int(temp2_fp); + + if (tu.async_en) + tu.delay_start_link += (int)temp; + + temp1_fp = drm_fixp_from_fraction(tu.delay_start_link, 1); + tu.delay_start_time_fp = drm_fixp_div(temp1_fp, tu.lclk_fp); + + /* OUTPUTS */ + tu_table->valid_boundary_link = tu.valid_boundary_link; + tu_table->delay_start_link = tu.delay_start_link; + tu_table->boundary_moderation_en = tu.boundary_moderation_en; + tu_table->valid_lower_boundary_link = tu.valid_lower_boundary_link; + tu_table->upper_boundary_count = tu.upper_boundary_count; + tu_table->lower_boundary_count = tu.lower_boundary_count; + tu_table->tu_size_minus1 = tu.tu_size_minus1; + + DRM_DEBUG_DP("TU: valid_boundary_link: %d\n", + tu_table->valid_boundary_link); + DRM_DEBUG_DP("TU: delay_start_link: %d\n", + tu_table->delay_start_link); + DRM_DEBUG_DP("TU: boundary_moderation_en: %d\n", + tu_table->boundary_moderation_en); + DRM_DEBUG_DP("TU: valid_lower_boundary_link: %d\n", + tu_table->valid_lower_boundary_link); + DRM_DEBUG_DP("TU: upper_boundary_count: %d\n", + tu_table->upper_boundary_count); + DRM_DEBUG_DP("TU: lower_boundary_count: %d\n", + tu_table->lower_boundary_count); + DRM_DEBUG_DP("TU: tu_size_minus1: %d\n", tu_table->tu_size_minus1); +} + +static void dp_ctrl_calc_tu_parameters(struct dp_ctrl_private *ctrl, + struct dp_vc_tu_mapping_table *tu_table) +{ + struct dp_tu_calc_input in; + struct drm_display_mode *drm_mode; + + drm_mode = &ctrl->panel->dp_mode.drm_mode; + + in.lclk = ctrl->link->link_params.rate / 1000; + in.pclk_khz = drm_mode->clock; + in.hactive = drm_mode->hdisplay; + in.hporch = drm_mode->htotal - drm_mode->hdisplay; + in.nlanes = ctrl->link->link_params.num_lanes; + in.bpp = ctrl->panel->dp_mode.bpp; + in.pixel_enc = 444; + in.dsc_en = 0; + in.async_en = 0; + in.fec_en = 0; + in.num_of_dsc_slices = 0; + in.compress_ratio = 100; + + _dp_ctrl_calc_tu(&in, tu_table); +} + +static void dp_ctrl_setup_tr_unit(struct dp_ctrl_private *ctrl) +{ + u32 dp_tu = 0x0; + u32 valid_boundary = 0x0; + u32 valid_boundary2 = 0x0; + struct dp_vc_tu_mapping_table tu_calc_table; + + dp_ctrl_calc_tu_parameters(ctrl, &tu_calc_table); + + dp_tu |= tu_calc_table.tu_size_minus1; + valid_boundary |= tu_calc_table.valid_boundary_link; + valid_boundary |= (tu_calc_table.delay_start_link << 16); + + valid_boundary2 |= (tu_calc_table.valid_lower_boundary_link << 1); + valid_boundary2 |= (tu_calc_table.upper_boundary_count << 16); + valid_boundary2 |= (tu_calc_table.lower_boundary_count << 20); + + if (tu_calc_table.boundary_moderation_en) + valid_boundary2 |= BIT(0); + + pr_debug("dp_tu=0x%x, valid_boundary=0x%x, valid_boundary2=0x%x\n", + dp_tu, valid_boundary, valid_boundary2); + + dp_catalog_ctrl_update_transfer_unit(ctrl->catalog, + dp_tu, valid_boundary, valid_boundary2); +} + +static int dp_ctrl_wait4video_ready(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + + if (!wait_for_completion_timeout(&ctrl->video_comp, + WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES)) { + DRM_ERROR("Link Train timedout\n"); + ret = -ETIMEDOUT; + } + return ret; +} + +static int dp_ctrl_update_vx_px(struct dp_ctrl_private *ctrl) +{ + struct dp_link *link = ctrl->link; + int ret = 0, lane, lane_cnt; + u8 buf[4]; + u32 max_level_reached = 0; + u32 voltage_swing_level = link->phy_params.v_level; + u32 pre_emphasis_level = link->phy_params.p_level; + + ret = dp_catalog_ctrl_update_vx_px(ctrl->catalog, + voltage_swing_level, pre_emphasis_level); + + if (ret) + return ret; + + if (voltage_swing_level > DP_TRAIN_VOLTAGE_SWING_MAX) { + DRM_DEBUG_DP("max. voltage swing level reached %d\n", + voltage_swing_level); + max_level_reached |= DP_TRAIN_MAX_SWING_REACHED; + } + + if (pre_emphasis_level == DP_TRAIN_PRE_EMPHASIS_MAX) { + DRM_DEBUG_DP("max. pre-emphasis level reached %d\n", + pre_emphasis_level); + max_level_reached |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; + } + + pre_emphasis_level <<= DP_TRAIN_PRE_EMPHASIS_SHIFT; + + lane_cnt = ctrl->link->link_params.num_lanes; + for (lane = 0; lane < lane_cnt; lane++) + buf[lane] = voltage_swing_level | pre_emphasis_level + | max_level_reached; + + DRM_DEBUG_DP("sink: p|v=0x%x\n", voltage_swing_level + | pre_emphasis_level); + ret = drm_dp_dpcd_write(ctrl->aux->drm_aux, DP_TRAINING_LANE0_SET, + buf, lane_cnt); + if (ret == lane_cnt) + ret = 0; + + return ret; +} + +static bool dp_ctrl_train_pattern_set(struct dp_ctrl_private *ctrl, + u8 pattern) +{ + u8 buf; + int ret = 0; + + DRM_DEBUG_DP("sink: pattern=%x\n", pattern); + + buf = pattern; + ret = drm_dp_dpcd_writeb(ctrl->aux->drm_aux, + DP_TRAINING_PATTERN_SET, buf); + return ret == 1; +} + +static int dp_ctrl_read_link_status(struct dp_ctrl_private *ctrl, + u8 *link_status) +{ + int len = 0; + u32 const offset = DP_LANE_ALIGN_STATUS_UPDATED - DP_LANE0_1_STATUS; + u32 link_status_read_max_retries = 100; + + while (--link_status_read_max_retries) { + len = drm_dp_dpcd_read_link_status(ctrl->aux->drm_aux, + link_status); + if (len != DP_LINK_STATUS_SIZE) { + DRM_ERROR("DP link status read failed, err: %d\n", len); + return len; + } + + if (!(link_status[offset] & DP_LINK_STATUS_UPDATED)) + return 0; + } + + return -ETIMEDOUT; +} + +static int dp_ctrl_link_train_1(struct dp_ctrl_private *ctrl) +{ + int tries, old_v_level, ret = 0; + u8 link_status[DP_LINK_STATUS_SIZE]; + int const maximum_retries = 5; + + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); + + ret = dp_catalog_ctrl_set_pattern(ctrl->catalog, DP_TRAINING_PATTERN_1); + if (ret) + return ret; + dp_ctrl_train_pattern_set(ctrl, DP_TRAINING_PATTERN_1 | + DP_LINK_SCRAMBLING_DISABLE); + ret = dp_ctrl_update_vx_px(ctrl); + if (ret) + return ret; + + tries = 0; + old_v_level = ctrl->link->phy_params.v_level; + for (tries = 0; tries < maximum_retries; tries++) { + drm_dp_link_train_clock_recovery_delay(ctrl->panel->dpcd); + + ret = dp_ctrl_read_link_status(ctrl, link_status); + if (ret) + return ret; + + if (drm_dp_clock_recovery_ok(link_status, + ctrl->link->link_params.num_lanes)) { + return ret; + } + + if (ctrl->link->phy_params.v_level > + DP_TRAIN_VOLTAGE_SWING_MAX) { + DRM_ERROR_RATELIMITED("max v_level reached\n"); + return -EAGAIN; + } + + if (old_v_level != ctrl->link->phy_params.v_level) { + tries = 0; + old_v_level = ctrl->link->phy_params.v_level; + } + + DRM_DEBUG_DP("clock recovery not done, adjusting vx px\n"); + + dp_link_adjust_levels(ctrl->link, link_status); + ret = dp_ctrl_update_vx_px(ctrl); + if (ret) + return ret; + } + + DRM_ERROR("max tries reached\n"); + return -ETIMEDOUT; +} + +static void dp_ctrl_link_rate_down_shift(struct dp_ctrl_private *ctrl) +{ + switch (ctrl->link->link_params.rate) { + case 810000: + ctrl->link->link_params.rate = 540000; + break; + case 540000: + ctrl->link->link_params.rate = 270000; + break; + case 270000: + case 162000: + default: + ctrl->link->link_params.rate = 162000; + break; + }; + + DRM_DEBUG_DP("new rate=0x%x\n", ctrl->link->link_params.rate); +} + +static void dp_ctrl_clear_training_pattern(struct dp_ctrl_private *ctrl) +{ + dp_ctrl_train_pattern_set(ctrl, DP_TRAINING_PATTERN_DISABLE); + drm_dp_link_train_channel_eq_delay(ctrl->panel->dpcd); +} + +static int dp_ctrl_link_training_2(struct dp_ctrl_private *ctrl) +{ + int tries = 0, ret = 0; + char pattern; + int const maximum_retries = 5; + u8 link_status[DP_LINK_STATUS_SIZE]; + + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); + + if (drm_dp_tps3_supported(ctrl->panel->dpcd)) + pattern = DP_TRAINING_PATTERN_3; + else + pattern = DP_TRAINING_PATTERN_2; + + ret = dp_ctrl_update_vx_px(ctrl); + if (ret) + return ret; + + ret = dp_catalog_ctrl_set_pattern(ctrl->catalog, pattern); + if (ret) + return ret; + + dp_ctrl_train_pattern_set(ctrl, pattern | DP_RECOVERED_CLOCK_OUT_EN); + + for (tries = 0; tries <= maximum_retries; tries++) { + drm_dp_link_train_channel_eq_delay(ctrl->panel->dpcd); + + ret = dp_ctrl_read_link_status(ctrl, link_status); + if (ret) + return ret; + + if (drm_dp_channel_eq_ok(link_status, + ctrl->link->link_params.num_lanes)) + return ret; + + dp_link_adjust_levels(ctrl->link, link_status); + ret = dp_ctrl_update_vx_px(ctrl); + if (ret) + return ret; + + } + + return -ETIMEDOUT; +} + +static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + u8 encoding = DP_SET_ANSI_8B10B; + struct dp_link_info link_info = {0}; + + ctrl->link->phy_params.p_level = 0; + ctrl->link->phy_params.v_level = 0; + + dp_ctrl_config_ctrl(ctrl); + + link_info.num_lanes = ctrl->link->link_params.num_lanes; + link_info.rate = ctrl->link->link_params.rate; + link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; + + dp_aux_link_configure(ctrl->aux->drm_aux, &link_info); + drm_dp_dpcd_write(ctrl->aux->drm_aux, DP_MAIN_LINK_CHANNEL_CODING_SET, + &encoding, 1); + + ret = dp_ctrl_link_train_1(ctrl); + if (ret) { + DRM_ERROR("link training #1 failed. ret=%d\n", ret); + goto end; + } + + /* print success info as this is a result of user initiated action */ + DRM_DEBUG_DP("link training #1 successful\n"); + + ret = dp_ctrl_link_training_2(ctrl); + if (ret) { + DRM_ERROR("link training #2 failed. ret=%d\n", ret); + goto end; + } + + /* print success info as this is a result of user initiated action */ + DRM_DEBUG_DP("link training #2 successful\n"); + +end: + dp_catalog_ctrl_state_ctrl(ctrl->catalog, 0); + + dp_ctrl_clear_training_pattern(ctrl); + return ret; +} + +static int dp_ctrl_setup_main_link(struct dp_ctrl_private *ctrl, bool train) +{ + bool mainlink_ready = false; + int ret = 0; + + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, true); + + ret = dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, false); + if (ret) + return ret; + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) + return ret; + + if (train) { + /* + * As part of previous calls, DP controller state might have + * transitioned to PUSH_IDLE. In order to start transmitting + * a link training pattern, we have to first do soft reset. + */ + dp_catalog_ctrl_reset(ctrl->catalog); + + ret = dp_ctrl_link_train(ctrl); + if (ret) + return ret; + } + + /* + * Set up transfer unit values and set controller state to send + * video. + */ + dp_ctrl_setup_tr_unit(ctrl); + dp_catalog_ctrl_state_ctrl(ctrl->catalog, DP_STATE_CTRL_SEND_VIDEO); + + ret = dp_ctrl_wait4video_ready(ctrl); + if (ret) + return ret; + + mainlink_ready = dp_catalog_ctrl_mainlink_ready(ctrl->catalog); + DRM_DEBUG_DP("mainlink %s\n", mainlink_ready ? "READY" : "NOT READY"); + return ret; +} + +static void dp_ctrl_set_clock_rate(struct dp_ctrl_private *ctrl, + char *name, u32 rate) +{ + u32 num = ctrl->parser->mp[DP_CTRL_PM].num_clk; + struct dss_clk *cfg = ctrl->parser->mp[DP_CTRL_PM].clk_config; + + while (num && strcmp(cfg->clk_name, name)) { + num--; + cfg++; + } + + DRM_DEBUG_DP("setting rate=%d on clk=%s\n", rate, name); + + if (num) + cfg->rate = rate; + else + DRM_ERROR("%s clock doesn't exit to set rate %d\n", + name, rate); +} + +static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + + dp_power_set_link_clk_parent(ctrl->power); + dp_power_set_pixel_clk_parent(ctrl->power); + + dp_ctrl_set_clock_rate(ctrl, "ctrl_link_clk", + ctrl->link->link_params.rate); + + dp_ctrl_set_clock_rate(ctrl, "ctrl_pixel_clk", + ctrl->dp_ctrl.pixel_rate); + + ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, true); + if (ret) + DRM_ERROR("Unable to start link clocks. ret=%d\n", ret); + + return ret; +} + +int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip) +{ + struct dp_ctrl_private *ctrl; + + if (!dp_ctrl) { + DRM_ERROR("Invalid input data\n"); + return -EINVAL; + } + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + ctrl->dp_ctrl.orientation = flip; + + dp_catalog_ctrl_usb_reset(ctrl->catalog, flip); + dp_catalog_ctrl_phy_reset(ctrl->catalog); + dp_catalog_ctrl_enable_irq(ctrl->catalog, true); + + return 0; +} + +/** + * dp_ctrl_host_deinit() - Uninitialize DP controller + * @ctrl: Display Port Driver data + * + * Perform required steps to uninitialize DP controller + * and its resources. + */ +void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + + if (!dp_ctrl) { + DRM_ERROR("Invalid input data\n"); + return; + } + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + dp_catalog_ctrl_enable_irq(ctrl->catalog, false); + + DRM_DEBUG_DP("Host deinitialized successfully\n"); +} + +static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl) +{ + u8 *dpcd = ctrl->panel->dpcd; + + /* + * For better interop experience, used a fixed NVID=0x8000 + * whenever connected to a VGA dongle downstream. + */ + if (drm_dp_is_branch(dpcd)) + return (drm_dp_has_quirk(&ctrl->panel->desc, + DP_DPCD_QUIRK_CONSTANT_N)); + + return false; +} + +static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); + dp_catalog_ctrl_phy_lane_cfg(ctrl->catalog, + ctrl->dp_ctrl.orientation, ctrl->link->link_params.num_lanes); + /* + * Disable and re-enable the mainlink clock since the + * link clock might have been adjusted as part of the + * link maintenance. + */ + ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false); + if (ret) { + DRM_ERROR("Failed to disable clocks. ret=%d\n", ret); + return ret; + } + /* hw recommended delay before re-enabling clocks */ + msleep(20); + + ret = dp_ctrl_enable_mainlink_clocks(ctrl); + if (ret) { + DRM_ERROR("Failed to enable mainlink clks. ret=%d\n", ret); + return ret; + } + + dp_ctrl_configure_source_params(ctrl); + dp_catalog_ctrl_config_msa(ctrl->catalog, + ctrl->link->link_params.rate, + ctrl->dp_ctrl.pixel_rate, dp_ctrl_use_fixed_nvid(ctrl)); + reinit_completion(&ctrl->idle_comp); + + return ret; +} + +static int dp_ctrl_link_maintenance(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + int tries; + + dp_ctrl_push_idle(&ctrl->dp_ctrl); + dp_catalog_ctrl_reset(ctrl->catalog); + + ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock; + + for (tries = 0; tries < 10; tries++) { + ret = dp_ctrl_reinitialize_mainlink(ctrl); + if (ret) { + DRM_ERROR("Failed to reinitialize mainlink. ret=%d\n", + ret); + break; + } + + ret = dp_ctrl_setup_main_link(ctrl, true); + if (ret == -EAGAIN) /* try with lower link rate */ + dp_ctrl_link_rate_down_shift(ctrl); + } + return ret; +} + +static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl) +{ + int ret = 0; + + if (!ctrl->link->phy_params.phy_test_pattern_sel) { + DRM_DEBUG_DP("no test pattern selected by sink\n"); + return ret; + } + + dp_ctrl_push_idle(&ctrl->dp_ctrl); + /* + * The global reset will need DP link related clocks to be + * running. Add the global reset just before disabling the + * link clocks and core clocks. + */ + dp_catalog_ctrl_reset(ctrl->catalog); + ret = dp_ctrl_off(&ctrl->dp_ctrl); + if (ret) { + DRM_ERROR("failed to disable DP controller\n"); + return ret; + } + + ret = dp_ctrl_on(&ctrl->dp_ctrl); + if (ret) + DRM_ERROR("failed to enable DP controller\n"); + + return ret; +} + +static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl) +{ + bool success = false; + u32 pattern_sent = 0x0; + u32 pattern_requested = ctrl->link->phy_params.phy_test_pattern_sel; + + DRM_DEBUG_DP("request: 0x%x\n", pattern_requested); + + if (dp_catalog_ctrl_update_vx_px(ctrl->catalog, + ctrl->link->phy_params.v_level, + ctrl->link->phy_params.p_level)) { + DRM_ERROR("Failed to set v/p levels\n"); + return false; + } + dp_catalog_ctrl_send_phy_pattern(ctrl->catalog, pattern_requested); + dp_link_send_test_response(ctrl->link); + + pattern_sent = dp_catalog_ctrl_read_phy_pattern(ctrl->catalog); + + switch (pattern_sent) { + case MR_LINK_TRAINING1: + success = pattern_requested == + DP_LINK_QUAL_PATTERN_D10_2; + break; + case MR_LINK_SYMBOL_ERM: + success = (pattern_requested == + DP_LINK_QUAL_PATTERN_ERROR_RATE) + || (pattern_requested == + DP_LINK_QUAL_PATTERN_HBR2_EYE); + break; + case MR_LINK_PRBS7: + success = pattern_requested == DP_LINK_QUAL_PATTERN_PRBS7; + break; + case MR_LINK_CUSTOM80: + success = pattern_requested == + DP_LINK_QUAL_PATTERN_80BIT_CUSTOM; + break; + default: + success = false; + } + + DRM_DEBUG_DP("%s: test->0x%x\n", success ? "success" : "failed", + pattern_requested); + return success; +} + +void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + u32 sink_request = 0x0; + + if (!dp_ctrl) { + DRM_ERROR("invalid input\n"); + return; + } + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + sink_request = ctrl->link->sink_request; + + if (sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) { + DRM_DEBUG_DP("PHY_TEST_PATTERN request\n"); + if (dp_ctrl_process_phy_test_request(ctrl)) { + DRM_ERROR("process phy_test_req failed\n"); + return; + } + } + + if (sink_request & DP_LINK_STATUS_UPDATED) + if (dp_ctrl_link_maintenance(ctrl)) { + DRM_ERROR("LM failed: STATUS_UPDATED\n"); + return; + } + + + if (sink_request & DP_TEST_LINK_TRAINING) { + dp_link_send_test_response(ctrl->link); + if (dp_ctrl_link_maintenance(ctrl)) { + DRM_ERROR("LM failed: TEST_LINK_TRAINING\n"); + return; + } + } +} + +int dp_ctrl_on(struct dp_ctrl *dp_ctrl) +{ + int rc = 0; + struct dp_ctrl_private *ctrl; + u32 rate = 0; + u32 link_train_max_retries = 10; + u32 const phy_cts_pixel_clk_khz = 148500; + + if (!dp_ctrl) + return -EINVAL; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + rate = ctrl->panel->link_info.rate; + + dp_power_clk_enable(ctrl->power, DP_CORE_PM, true); + dp_catalog_ctrl_hpd_config(ctrl->catalog, true); + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) { + DRM_DEBUG_DP("using phy test link parameters\n"); + if (!ctrl->panel->dp_mode.drm_mode.clock) + ctrl->dp_ctrl.pixel_rate = phy_cts_pixel_clk_khz; + } else { + ctrl->link->link_params.rate = rate; + ctrl->link->link_params.num_lanes = + ctrl->panel->link_info.num_lanes; + ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock; + } + + DRM_DEBUG_DP("rate=%d, num_lanes=%d, pixel_rate=%d\n", + ctrl->link->link_params.rate, + ctrl->link->link_params.num_lanes, ctrl->dp_ctrl.pixel_rate); + + dp_catalog_ctrl_phy_lane_cfg(ctrl->catalog, + ctrl->dp_ctrl.orientation, + ctrl->link->link_params.num_lanes); + + rc = dp_ctrl_enable_mainlink_clocks(ctrl); + if (rc) + return rc; + + while (--link_train_max_retries && + !atomic_read(&ctrl->dp_ctrl.aborted)) { + rc = dp_ctrl_reinitialize_mainlink(ctrl); + if (rc) { + DRM_ERROR("Failed to reinitialize mainlink. rc=%d\n", + rc); + break; + } + rc = dp_ctrl_setup_main_link(ctrl, true); + if (!rc) + break; + /* try with lower link rate */ + dp_ctrl_link_rate_down_shift(ctrl); + } + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) + dp_ctrl_send_phy_test_pattern(ctrl); + + return rc; +} + +int dp_ctrl_off(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + int ret = 0; + + if (!dp_ctrl) + return -EINVAL; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); + dp_catalog_ctrl_reset(ctrl->catalog); + ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false); + if (ret) { + DRM_ERROR("Failed to disable clocks. ret=%d\n", ret); + return ret; + } + + DRM_DEBUG_DP("DP off done\n"); + return ret; +} + +void dp_ctrl_isr(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + u32 isr; + + if (!dp_ctrl) + return; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + isr = dp_catalog_ctrl_get_interrupt(ctrl->catalog); + + if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { + DRM_DEBUG_DP("dp_video_ready\n"); + complete(&ctrl->video_comp); + } + + if (isr & DP_CTRL_INTR_IDLE_PATTERN_SENT) { + DRM_DEBUG_DP("idle_patterns_sent\n"); + complete(&ctrl->idle_comp); + } +} + +struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, + struct dp_panel *panel, struct dp_aux *aux, + struct dp_power *power, struct dp_catalog *catalog, + struct dp_parser *parser) +{ + struct dp_ctrl_private *ctrl; + + if (!dev || !panel || !aux || + !link || !catalog) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) { + DRM_ERROR("Mem allocation failure\n"); + return ERR_PTR(-ENOMEM); + } + + init_completion(&ctrl->idle_comp); + init_completion(&ctrl->video_comp); + mutex_init(&ctrl->push_idle_mutex); + + /* in parameters */ + ctrl->parser = parser; + ctrl->panel = panel; + ctrl->power = power; + ctrl->aux = aux; + ctrl->link = link; + ctrl->catalog = catalog; + ctrl->dev = dev; + + return &ctrl->dp_ctrl; +} + +void dp_ctrl_put(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + + if (!dp_ctrl) + return; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + + mutex_destroy(&ctrl->push_idle_mutex); +} diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h new file mode 100644 index 0000000..63681e82 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_CTRL_H_ +#define _DP_CTRL_H_ + +#include "dp_aux.h" +#include "dp_panel.h" +#include "dp_link.h" +#include "dp_parser.h" +#include "dp_power.h" +#include "dp_catalog.h" + +struct dp_ctrl { + bool orientation; + atomic_t aborted; + u32 pixel_rate; +}; + +int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip); +void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl); +int dp_ctrl_on(struct dp_ctrl *dp_ctrl); +int dp_ctrl_off(struct dp_ctrl *dp_ctrl); +void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl); +void dp_ctrl_isr(struct dp_ctrl *dp_ctrl); +void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl); +struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link, + struct dp_panel *panel, struct dp_aux *aux, + struct dp_power *power, struct dp_catalog *catalog, + struct dp_parser *parser); +void dp_ctrl_put(struct dp_ctrl *dp_ctrl); + +#endif /* _DP_CTRL_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c new file mode 100644 index 0000000..d722495 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -0,0 +1,897 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/debugfs.h> +#include <linux/component.h> +#include <linux/of_irq.h> + +#include "msm_drv.h" +#include "msm_kms.h" +#include "dp_hpd.h" +#include "dp_parser.h" +#include "dp_power.h" +#include "dp_catalog.h" +#include "dp_aux.h" +#include "dp_link.h" +#include "dp_panel.h" +#include "dp_ctrl.h" +#include "dp_display.h" +#include "dp_drm.h" + +static struct msm_dp *g_dp_display; +#define HPD_STRING_SIZE 30 + +struct dp_display_private { + char *name; + int irq; + + /* state variables */ + bool core_initialized; + bool power_on; + bool hpd_irq_on; + bool audio_supported; + + struct platform_device *pdev; + struct dentry *root; + struct completion notification_comp; + + struct dp_usbpd *usbpd; + struct dp_parser *parser; + struct dp_power *power; + struct dp_catalog *catalog; + struct dp_aux *aux; + struct dp_link *link; + struct dp_panel *panel; + struct dp_ctrl *ctrl; + + struct dp_usbpd_cb usbpd_cb; + struct dp_display_mode dp_mode; + struct msm_dp dp_display; +}; + +static const struct of_device_id dp_dt_match[] = { + {.compatible = "qcom,dp-display"}, + {} +}; + +static irqreturn_t dp_display_irq(int irq, void *dev_id) +{ + struct dp_display_private *dp = dev_id; + + /* DP controller isr */ + dp_ctrl_isr(dp->ctrl); + + /* DP aux isr */ + dp_aux_isr(dp->aux); + + return IRQ_HANDLED; +} + +static int dp_display_bind(struct device *dev, struct device *master, + void *data) +{ + int rc = 0; + struct dp_display_private *dp; + struct drm_device *drm; + struct msm_drm_private *priv; + struct platform_device *pdev = to_platform_device(dev); + + drm = dev_get_drvdata(master); + dp = platform_get_drvdata(pdev); + + dp->dp_display.drm_dev = drm; + priv = drm->dev_private; + priv->dp = &(dp->dp_display); + + rc = dp->parser->parse(dp->parser); + if (rc) { + DRM_ERROR("device tree parsing failed\n"); + goto end; + } + + rc = dp_aux_register(dp->aux); + if (rc) { + DRM_ERROR("DRM DP AUX register failed\n"); + goto end; + } + + rc = dp_power_client_init(dp->power); + if (rc) { + DRM_ERROR("Power client create failed\n"); + goto end; + } + +end: + return rc; +} + +static void dp_display_unbind(struct device *dev, struct device *master, + void *data) +{ + struct dp_display_private *dp; + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm = dev_get_drvdata(master); + struct msm_drm_private *priv = drm->dev_private; + + dp = platform_get_drvdata(pdev); + + dp_power_client_deinit(dp->power); + dp_aux_unregister(dp->aux); + priv->dp = NULL; +} + +static const struct component_ops dp_display_comp_ops = { + .bind = dp_display_bind, + .unbind = dp_display_unbind, +}; + +static bool dp_display_is_ds_bridge(struct dp_panel *panel) +{ + return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] & + DP_DWN_STRM_PORT_PRESENT); +} + +static bool dp_display_is_sink_count_zero(struct dp_display_private *dp) +{ + return dp_display_is_ds_bridge(dp->panel) && + (dp->link->sink_count == 0); +} + +static void dp_display_send_hpd_event(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + struct drm_connector *connector; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + connector = dp->dp_display.connector; + drm_helper_hpd_irq_event(connector->dev); +} + +static int dp_display_send_hpd_notification(struct dp_display_private *dp, + bool hpd) +{ + static bool encoder_mode_set; + struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private; + struct msm_kms *kms = priv->kms; + + mutex_lock(&dp->dp_display.connect_mutex); + if ((hpd && dp->dp_display.is_connected) || + (!hpd && !dp->dp_display.is_connected)) { + DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off")); + mutex_unlock(&dp->dp_display.connect_mutex); + return 0; + } + + /* reset video pattern flag on disconnect */ + if (!hpd) + dp->panel->video_test = false; + + dp->dp_display.is_connected = hpd; + reinit_completion(&dp->notification_comp); + + if (dp->dp_display.is_connected && dp->dp_display.encoder + && !encoder_mode_set + && kms->funcs->set_encoder_mode) { + kms->funcs->set_encoder_mode(kms, + dp->dp_display.encoder, false); + DRM_DEBUG_DP("set_encoder_mode() Completed\n"); + encoder_mode_set = true; + } + + dp_display_send_hpd_event(&dp->dp_display); + + if (!wait_for_completion_timeout(&dp->notification_comp, HZ * 2)) { + pr_warn("%s timeout\n", hpd ? "connect" : "disconnect"); + mutex_unlock(&dp->dp_display.connect_mutex); + return -EINVAL; + } + + mutex_unlock(&dp->dp_display.connect_mutex); + return 0; +} + +static int dp_display_process_hpd_high(struct dp_display_private *dp) +{ + int rc = 0; + struct edid *edid; + + dp_aux_init(dp->aux, dp->parser->aux_cfg); + + if (dp->link->psm_enabled) + goto notify; + + dp->panel->max_dp_lanes = dp->parser->max_dp_lanes; + + rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector); + if (rc) + goto notify; + + dp_link_process_request(dp->link); + + if (dp_display_is_sink_count_zero(dp)) { + DRM_DEBUG_DP("no downstream devices connected\n"); + rc = -EINVAL; + goto end; + } + + edid = dp->panel->edid; + + dp->audio_supported = drm_detect_monitor_audio(edid); + + dp_panel_handle_sink_request(dp->panel); + + dp->dp_display.max_pclk_khz = dp->parser->max_pclk_khz; + dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes; +notify: + dp_display_send_hpd_notification(dp, true); + +end: + return rc; +} + +static void dp_display_host_init(struct dp_display_private *dp) +{ + bool flip = false; + + if (dp->core_initialized) { + DRM_DEBUG_DP("DP core already initialized\n"); + return; + } + + if (dp->usbpd->orientation == ORIENTATION_CC2) + flip = true; + + dp_power_init(dp->power, flip); + dp_ctrl_host_init(dp->ctrl, flip); + enable_irq(dp->irq); + dp->core_initialized = true; +} + +static void dp_display_host_deinit(struct dp_display_private *dp) +{ + if (!dp->core_initialized) { + DRM_DEBUG_DP("DP core already off\n"); + return; + } + + dp_ctrl_host_deinit(dp->ctrl); + dp_aux_deinit(dp->aux); + dp_power_deinit(dp->power); + disable_irq(dp->irq); + dp->core_initialized = false; +} + +static void dp_display_process_hpd_low(struct dp_display_private *dp) +{ + dp_display_send_hpd_notification(dp, false); + + dp_aux_deinit(dp->aux); +} + +static int dp_display_usbpd_configure_cb(struct device *dev) +{ + int rc = 0; + struct dp_display_private *dp; + + if (!dev) { + DRM_ERROR("invalid dev\n"); + rc = -EINVAL; + goto end; + } + + dp = dev_get_drvdata(dev); + if (!dp) { + DRM_ERROR("no driver data found\n"); + rc = -ENODEV; + goto end; + } + + dp_display_host_init(dp); + + if (dp->usbpd->hpd_high) + dp_display_process_hpd_high(dp); +end: + return rc; +} + +static void dp_display_clean(struct dp_display_private *dp) +{ + dp_ctrl_push_idle(dp->ctrl); + dp_ctrl_off(dp->ctrl); +} + +static int dp_display_usbpd_disconnect_cb(struct device *dev) +{ + int rc = 0; + struct dp_display_private *dp; + + dp = dev_get_drvdata(dev); + + rc = dp_display_send_hpd_notification(dp, false); + + /* if cable is disconnected, reset psm_enabled flag */ + if (!dp->usbpd->alt_mode_cfg_done) + dp->link->psm_enabled = false; + + if ((rc < 0) && dp->power_on) + dp_display_clean(dp); + + dp_display_host_deinit(dp); + return rc; +} + +static void dp_display_handle_video_request(struct dp_display_private *dp) +{ + if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) { + /* force disconnect followed by connect */ + dp->usbpd->connect(dp->usbpd, false); + dp->panel->video_test = true; + dp->usbpd->connect(dp->usbpd, true); + dp_link_send_test_response(dp->link); + } +} + +static int dp_display_handle_hpd_irq(struct dp_display_private *dp) +{ + if (dp->link->sink_request & DS_PORT_STATUS_CHANGED) { + dp_display_send_hpd_notification(dp, false); + + if (dp_display_is_sink_count_zero(dp)) { + DRM_DEBUG_DP("sink count is zero, nothing to do\n"); + return 0; + } + + return dp_display_process_hpd_high(dp); + } + + dp_ctrl_handle_sink_request(dp->ctrl); + + dp_display_handle_video_request(dp); + + return 0; +} + +static int dp_display_usbpd_attention_cb(struct device *dev) +{ + int rc = 0; + struct dp_display_private *dp; + + if (!dev) { + DRM_ERROR("invalid dev\n"); + return -EINVAL; + } + + dp = dev_get_drvdata(dev); + if (!dp) { + DRM_ERROR("no driver data found\n"); + return -ENODEV; + } + + if (dp->usbpd->hpd_irq) { + dp->hpd_irq_on = true; + + rc = dp_link_process_request(dp->link); + /* check for any test request issued by sink */ + if (!rc) + dp_display_handle_hpd_irq(dp); + + dp->hpd_irq_on = false; + goto end; + } + + if (!dp->usbpd->hpd_high) { + dp_display_process_hpd_low(dp); + goto end; + } + + if (dp->usbpd->alt_mode_cfg_done) + dp_display_process_hpd_high(dp); +end: + return rc; +} + +static void dp_display_deinit_sub_modules(struct dp_display_private *dp) +{ + dp_ctrl_put(dp->ctrl); + dp_panel_put(dp->panel); + dp_aux_put(dp->aux); +} + +static int dp_init_sub_modules(struct dp_display_private *dp) +{ + int rc = 0; + struct device *dev = &dp->pdev->dev; + struct dp_usbpd_cb *cb = &dp->usbpd_cb; + struct dp_panel_in panel_in = { + .dev = dev, + }; + + /* Callback APIs used for cable status change event */ + cb->configure = dp_display_usbpd_configure_cb; + cb->disconnect = dp_display_usbpd_disconnect_cb; + cb->attention = dp_display_usbpd_attention_cb; + + dp->usbpd = dp_hpd_get(dev, cb); + if (IS_ERR(dp->usbpd)) { + rc = PTR_ERR(dp->usbpd); + DRM_ERROR("failed to initialize hpd, rc = %d\n", rc); + dp->usbpd = NULL; + goto error; + } + + dp->parser = dp_parser_get(dp->pdev); + if (IS_ERR(dp->parser)) { + rc = PTR_ERR(dp->parser); + DRM_ERROR("failed to initialize parser, rc = %d\n", rc); + dp->parser = NULL; + goto error; + } + + dp->catalog = dp_catalog_get(dev, &dp->parser->io); + if (IS_ERR(dp->catalog)) { + rc = PTR_ERR(dp->catalog); + DRM_ERROR("failed to initialize catalog, rc = %d\n", rc); + dp->catalog = NULL; + goto error; + } + + dp->power = dp_power_get(dp->parser); + if (IS_ERR(dp->power)) { + rc = PTR_ERR(dp->power); + DRM_ERROR("failed to initialize power, rc = %d\n", rc); + dp->power = NULL; + goto error; + } + + dp->aux = dp_aux_get(dev, dp->catalog, dp->parser->aux_cfg); + if (IS_ERR(dp->aux)) { + rc = PTR_ERR(dp->aux); + DRM_ERROR("failed to initialize aux, rc = %d\n", rc); + dp->aux = NULL; + goto error; + } + + dp->link = dp_link_get(dev, dp->aux); + if (IS_ERR(dp->link)) { + rc = PTR_ERR(dp->link); + DRM_ERROR("failed to initialize link, rc = %d\n", rc); + dp->link = NULL; + goto error_link; + } + + panel_in.aux = dp->aux; + panel_in.catalog = dp->catalog; + panel_in.link = dp->link; + + dp->panel = dp_panel_get(&panel_in); + if (IS_ERR(dp->panel)) { + rc = PTR_ERR(dp->panel); + DRM_ERROR("failed to initialize panel, rc = %d\n", rc); + dp->panel = NULL; + goto error_link; + } + + dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux, + dp->power, dp->catalog, dp->parser); + if (IS_ERR(dp->ctrl)) { + rc = PTR_ERR(dp->ctrl); + DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc); + dp->ctrl = NULL; + goto error_ctrl; + } + + return rc; +error_ctrl: + dp_panel_put(dp->panel); +error_link: + dp_aux_put(dp->aux); +error: + return rc; +} + +static int dp_display_set_mode(struct msm_dp *dp_display, + struct dp_display_mode *mode) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + dp->panel->dp_mode.drm_mode = mode->drm_mode; + dp->panel->dp_mode.bpp = mode->bpp; + dp->panel->dp_mode.capabilities = mode->capabilities; + dp_panel_init_panel_info(dp->panel); + return 0; +} + +static int dp_display_prepare(struct msm_dp *dp) +{ + return 0; +} + +static void dp_display_dump(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + dp_panel_dump_regs(dp->panel); +} + +static int dp_display_enable(struct msm_dp *dp_display) +{ + int rc = 0; + struct dp_display_private *dp; + bool dump_dp = false; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + if (dp->power_on) { + DRM_DEBUG_DP("Link already setup, return\n"); + return 0; + } + + rc = dp_ctrl_on(dp->ctrl); + if (!rc) + dp->power_on = true; + + if (dump_dp != false) + dp_display_dump(dp_display); + + return rc; +} + +static int dp_display_post_enable(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + complete_all(&dp->notification_comp); + return 0; +} + +static int dp_display_pre_disable(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + if (dp->usbpd->alt_mode_cfg_done) + dp_link_psm_config(dp->link, &dp->panel->link_info, true); + + dp_ctrl_push_idle(dp->ctrl); + return 0; +} + +static int dp_display_disable(struct msm_dp *dp_display) +{ + struct dp_display_private *dp; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + if (!dp->power_on || !dp->core_initialized) + return -EINVAL; + + dp_ctrl_off(dp->ctrl); + + dp->power_on = false; + + complete_all(&dp->notification_comp); + return 0; +} + +int dp_display_request_irq(struct msm_dp *dp_display) +{ + int rc = 0; + struct dp_display_private *dp; + + if (!dp_display) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0); + if (dp->irq < 0) { + rc = dp->irq; + DRM_ERROR("failed to get irq: %d\n", rc); + return rc; + } + + rc = devm_request_irq(&dp->pdev->dev, dp->irq, dp_display_irq, + IRQF_TRIGGER_HIGH, "dp_display_isr", dp); + if (rc < 0) { + DRM_ERROR("failed to request IRQ%u: %d\n", + dp->irq, rc); + return rc; + } + disable_irq(dp->irq); + + return 0; +} + +static int dp_display_unprepare(struct msm_dp *dp) +{ + return 0; +} + +int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz) +{ + const u32 num_components = 3, default_bpp = 24; + struct dp_display_private *dp_display; + struct dp_link_info *link_info; + u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0; + + if (!dp || !mode_pclk_khz || !dp->connector) { + DRM_ERROR("invalid params\n"); + return -EINVAL; + } + + dp_display = container_of(dp, struct dp_display_private, dp_display); + link_info = &dp_display->panel->link_info; + + mode_bpp = dp->connector->display_info.bpc * num_components; + if (!mode_bpp) + mode_bpp = default_bpp; + + mode_bpp = dp_panel_get_mode_bpp(dp_display->panel, + mode_bpp, mode_pclk_khz); + + mode_rate_khz = mode_pclk_khz * mode_bpp; + supported_rate_khz = link_info->num_lanes * link_info->rate * 8; + + if (mode_rate_khz > supported_rate_khz) + return MODE_BAD; + + return MODE_OK; +} + +int dp_display_get_modes(struct msm_dp *dp, + struct dp_display_mode *dp_mode) +{ + struct dp_display_private *dp_display; + int ret = 0; + + if (!dp) { + DRM_ERROR("invalid params\n"); + return 0; + } + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + ret = dp_panel_get_modes(dp_display->panel, + dp->connector, dp_mode); + if (dp_mode->drm_mode.clock) + dp->max_pclk_khz = dp_mode->drm_mode.clock; + return ret; +} + +bool dp_display_check_video_test(struct msm_dp *dp) +{ + struct dp_display_private *dp_display; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + return (dp_display->panel->video_test); +} + +int dp_display_get_test_bpp(struct msm_dp *dp) +{ + struct dp_display_private *dp_display; + + if (!dp) { + DRM_ERROR("invalid params\n"); + return 0; + } + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + return dp_link_bit_depth_to_bpp( + dp_display->link->test_video.test_bit_depth); +} + +static int dp_display_probe(struct platform_device *pdev) +{ + int rc = 0; + struct dp_display_private *dp; + + if (!pdev || !pdev->dev.of_node) { + DRM_ERROR("pdev not found\n"); + return -ENODEV; + } + + dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL); + if (!dp) + return -ENOMEM; + + init_completion(&dp->notification_comp); + + dp->pdev = pdev; + dp->name = "drm_dp"; + + rc = dp_init_sub_modules(dp); + if (rc) { + DRM_ERROR("init sub module failed\n"); + return -EPROBE_DEFER; + } + + platform_set_drvdata(pdev, dp); + + mutex_init(&dp->dp_display.connect_mutex); + g_dp_display = &dp->dp_display; + + rc = component_add(&pdev->dev, &dp_display_comp_ops); + if (rc) { + DRM_ERROR("component add failed, rc=%d\n", rc); + dp_display_deinit_sub_modules(dp); + } + + return rc; +} + +static int dp_display_remove(struct platform_device *pdev) +{ + struct dp_display_private *dp; + + dp = platform_get_drvdata(pdev); + + dp_display_deinit_sub_modules(dp); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver dp_display_driver = { + .probe = dp_display_probe, + .remove = dp_display_remove, + .driver = { + .name = "msm-dp-display", + .of_match_table = dp_dt_match, + }, +}; + +int __init msm_dp_register(void) +{ + int ret; + + ret = platform_driver_register(&dp_display_driver); + if (ret) + DRM_ERROR("Dp display driver register failed"); + + return ret; +} + +void __exit msm_dp_unregister(void) +{ + platform_driver_unregister(&dp_display_driver); +} + +int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, + struct drm_encoder *encoder) +{ + struct msm_drm_private *priv; + int ret; + + if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev)) + return -EINVAL; + + priv = dev->dev_private; + dp_display->drm_dev = dev; + + ret = dp_display_request_irq(dp_display); + if (ret) { + DRM_ERROR("request_irq failed, ret=%d\n", ret); + return ret; + } + + dp_display->encoder = encoder; + + dp_display->connector = dp_drm_connector_init(dp_display); + if (IS_ERR(dp_display->connector)) { + ret = PTR_ERR(dp_display->connector); + DRM_DEV_ERROR(dev->dev, + "failed to create dp connector: %d\n", ret); + dp_display->connector = NULL; + return ret; + } + + priv->connectors[priv->num_connectors++] = dp_display->connector; + return 0; +} + +int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) +{ + int rc = 0; + struct dp_display_private *dp_display; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + if (!dp_display->dp_mode.drm_mode.clock) { + DRM_ERROR("invalid params\n"); + return -EINVAL; + } + + rc = dp_display_set_mode(dp, &dp_display->dp_mode); + if (rc) { + DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc); + return rc; + } + + rc = dp_display_prepare(dp); + if (rc) { + DRM_ERROR("DP display prepare failed, rc=%d\n", rc); + return rc; + } + + rc = dp_display_enable(dp); + if (rc) { + DRM_ERROR("DP display enable failed, rc=%d\n", rc); + dp_display_unprepare(dp); + return rc; + } + + rc = dp_display_post_enable(dp); + if (rc) { + DRM_ERROR("DP display post enable failed, rc=%d\n", rc); + dp_display_disable(dp); + dp_display_unprepare(dp); + } + return rc; +} + +int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) +{ + int rc = 0; + + rc = dp_display_pre_disable(dp); + if (rc) { + DRM_ERROR("DP display pre disable failed, rc=%d\n", rc); + return rc; + } + + rc = dp_display_disable(dp); + if (rc) { + DRM_ERROR("DP display disable failed, rc=%d\n", rc); + return rc; + } + + rc = dp_display_unprepare(dp); + if (rc) + DRM_ERROR("DP display unprepare failed, rc=%d\n", rc); + + return rc; +} + +void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct dp_display_private *dp_display; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + + memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode)); + + if (dp_display_check_video_test(dp)) + dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp); + else /* Default num_components per pixel = 3 */ + dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3; + + if (!dp_display->dp_mode.bpp) + dp_display->dp_mode.bpp = 24; /* Default bpp */ + + drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode); + + dp_display->dp_mode.v_active_low = + !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC); + + dp_display->dp_mode.h_active_low = + !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC); +} diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h new file mode 100644 index 0000000..dad8610 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_DISPLAY_H_ +#define _DP_DISPLAY_H_ + +#include "dp_panel.h" + +struct msm_dp { + struct drm_device *drm_dev; + struct drm_connector *connector; + struct drm_encoder *encoder; + bool is_connected; + struct mutex connect_mutex; + u32 max_pclk_khz; + u32 max_dp_lanes; +}; + +int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz); +int dp_display_get_modes(struct msm_dp *dp_display, + struct dp_display_mode *dp_mode); +int dp_display_request_irq(struct msm_dp *dp_display); +bool dp_display_check_video_test(struct msm_dp *dp_display); +int dp_display_get_test_bpp(struct msm_dp *dp_display); + +#endif /* _DP_DISPLAY_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c new file mode 100644 index 0000000..9475b03 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_atomic.h> +#include <drm/drm_crtc.h> + +#include "msm_drv.h" +#include "msm_kms.h" +#include "dp_drm.h" + +struct dp_connector { + struct drm_connector base; + struct msm_dp *dp_display; +}; +#define to_dp_connector(x) container_of(x, struct dp_connector, base) + +/** + * dp_connector_detect - callback to determine if connector is connected + * @connector: Pointer to drm connector structure + * @force: Force detect setting from drm framework + * Returns: Connector 'is connected' status + */ +static enum drm_connector_status dp_connector_detect(struct drm_connector *conn, + bool force) +{ + struct msm_dp *dp; + + dp = to_dp_connector(conn)->dp_display; + + DRM_DEBUG_DP("is_connected = %s\n", + (dp->is_connected) ? "true" : "false"); + + return (dp->is_connected) ? connector_status_connected : + connector_status_disconnected; +} + +/** + * dp_connector_get_modes - callback to add drm modes via drm_mode_probed_add() + * @connector: Pointer to drm connector structure + * Returns: Number of modes added + */ +static int dp_connector_get_modes(struct drm_connector *connector) +{ + int rc = 0; + struct msm_dp *dp; + struct dp_display_mode *dp_mode = NULL; + struct drm_display_mode *m, drm_mode; + + if (!connector) + return 0; + + dp = to_dp_connector(connector)->dp_display; + + dp_mode = kzalloc(sizeof(*dp_mode), GFP_KERNEL); + if (!dp_mode) + return 0; + + mutex_lock(&dp->connect_mutex); + /* pluggable case assumes EDID is read when HPD */ + if (dp->is_connected) { + /* + *The get_modes() function might return one mode that is stored + * in dp_mode when compliance test is in progress. If not, the + * return value is equal to the total number of modes supported + * by the sink + */ + rc = dp_display_get_modes(dp, dp_mode); + if (rc <= 0) { + DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc); + kfree(dp_mode); + mutex_unlock(&dp->connect_mutex); + return rc; + } + if (dp_mode->drm_mode.clock) { /* valid DP mode */ + memset(&drm_mode, 0x0, sizeof(drm_mode)); + drm_mode_copy(&drm_mode, &dp_mode->drm_mode); + m = drm_mode_duplicate(connector->dev, &drm_mode); + if (!m) { + DRM_ERROR("failed to add mode %ux%u\n", + drm_mode.hdisplay, + drm_mode.vdisplay); + kfree(dp_mode); + mutex_unlock(&dp->connect_mutex); + return 0; + } + drm_mode_probed_add(connector, m); + } + } else { + DRM_DEBUG_DP("No sink connected\n"); + } + mutex_unlock(&dp->connect_mutex); + kfree(dp_mode); + return rc; +} + +/** + * dp_connector_mode_valid - callback to determine if specified mode is valid + * @connector: Pointer to drm connector structure + * @mode: Pointer to drm mode structure + * Returns: Validity status for specified mode + */ +static enum drm_mode_status dp_connector_mode_valid( + struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct msm_dp *dp_disp; + + dp_disp = to_dp_connector(connector)->dp_display; + + mode->vrefresh = drm_mode_vrefresh(mode); + + if ((dp_disp->max_pclk_khz <= 0) || + (dp_disp->max_pclk_khz > DP_MAX_PIXEL_CLK_KHZ) || + (mode->clock > dp_disp->max_pclk_khz)) + return MODE_BAD; + + return dp_display_validate_mode(dp_disp, mode->clock); +} + +static const struct drm_connector_funcs dp_connector_funcs = { + .detect = dp_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_connector_helper_funcs dp_connector_helper_funcs = { + .get_modes = dp_connector_get_modes, + .mode_valid = dp_connector_mode_valid, +}; + +/* connector initialization */ +struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display) +{ + struct drm_connector *connector = NULL; + struct dp_connector *dp_connector; + int ret; + + dp_connector = devm_kzalloc(dp_display->drm_dev->dev, + sizeof(*dp_connector), + GFP_KERNEL); + if (!dp_connector) + return ERR_PTR(-ENOMEM); + + dp_connector->dp_display = dp_display; + + connector = &dp_connector->base; + + ret = drm_connector_init(dp_display->drm_dev, connector, + &dp_connector_funcs, + DRM_MODE_CONNECTOR_DisplayPort); + if (ret) + return ERR_PTR(ret); + + drm_connector_helper_add(connector, &dp_connector_helper_funcs); + + /* + * Enable HPD to let hpd event is handled when cable is connected. + */ + connector->polled = DRM_CONNECTOR_POLL_HPD; + + drm_connector_attach_encoder(connector, dp_display->encoder); + + return connector; +} diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h new file mode 100644 index 0000000..a4ffdef --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_drm.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_DRM_H_ +#define _DP_DRM_H_ + +#include <linux/types.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> + +#include "msm_drv.h" +#include "dp_display.h" + +struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display); + +#endif /* _DP_DRM_H_ */ + diff --git a/drivers/gpu/drm/msm/dp/dp_hpd.c b/drivers/gpu/drm/msm/dp/dp_hpd.c new file mode 100644 index 0000000..5b08ce58 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hpd.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/slab.h> +#include <linux/device.h> + +#include "dp_hpd.h" + +/* DP specific VDM commands */ +#define DP_USBPD_VDM_STATUS 0x10 +#define DP_USBPD_VDM_CONFIGURE 0x11 + +/* USBPD-TypeC specific Macros */ +#define VDM_VERSION 0x0 +#define USB_C_DP_SID 0xFF01 + +struct dp_hpd_private { + struct device *dev; + struct dp_usbpd_cb *dp_cb; + struct dp_usbpd dp_usbpd; +}; + +static int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd) +{ + int rc = 0; + struct dp_hpd_private *hpd_priv; + + hpd_priv = container_of(dp_usbpd, struct dp_hpd_private, + dp_usbpd); + + dp_usbpd->hpd_high = hpd; + + if (!hpd_priv->dp_cb && !hpd_priv->dp_cb->configure + && !hpd_priv->dp_cb->disconnect) { + pr_err("hpd dp_cb not initialized\n"); + return -EINVAL; + } + if (hpd) + hpd_priv->dp_cb->configure(hpd_priv->dev); + else + hpd_priv->dp_cb->disconnect(hpd_priv->dev); + + return rc; +} + +struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb) +{ + struct dp_hpd_private *dp_hpd; + + if (!cb) { + pr_err("invalid cb data\n"); + return ERR_PTR(-EINVAL); + } + + dp_hpd = devm_kzalloc(dev, sizeof(*dp_hpd), GFP_KERNEL); + if (!dp_hpd) + return ERR_PTR(-ENOMEM); + + dp_hpd->dev = dev; + dp_hpd->dp_cb = cb; + + dp_hpd->dp_usbpd.connect = dp_hpd_connect; + + return &dp_hpd->dp_usbpd; +} diff --git a/drivers/gpu/drm/msm/dp/dp_hpd.h b/drivers/gpu/drm/msm/dp/dp_hpd.h new file mode 100644 index 0000000..c0178524 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_hpd.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_HPD_H_ +#define _DP_HPD_H_ + +//#include <linux/usb/usbpd.h> + +#include <linux/types.h> +#include <linux/device.h> + +enum plug_orientation { + ORIENTATION_NONE, + ORIENTATION_CC1, + ORIENTATION_CC2, +}; + +/** + * struct dp_usbpd - DisplayPort status + * + * @orientation: plug orientation configuration + * @low_pow_st: low power state + * @adaptor_dp_en: adaptor functionality enabled + * @multi_func: multi-function preferred + * @usb_config_req: request to switch to usb + * @exit_dp_mode: request exit from displayport mode + * @hpd_high: Hot Plug Detect signal is high. + * @hpd_irq: Change in the status since last message + * @alt_mode_cfg_done: bool to specify alt mode status + * @debug_en: bool to specify debug mode + * @connect: simulate disconnect or connect for debug mode + */ +struct dp_usbpd { + enum plug_orientation orientation; + bool low_pow_st; + bool adaptor_dp_en; + bool multi_func; + bool usb_config_req; + bool exit_dp_mode; + bool hpd_high; + bool hpd_irq; + bool alt_mode_cfg_done; + bool debug_en; + + int (*connect)(struct dp_usbpd *dp_usbpd, bool hpd); +}; + +/** + * struct dp_usbpd_cb - callback functions provided by the client + * + * @configure: called by usbpd module when PD communication has + * been completed and the usb peripheral has been configured on + * dp mode. + * @disconnect: notify the cable disconnect issued by usb. + * @attention: notify any attention message issued by usb. + */ +struct dp_usbpd_cb { + int (*configure)(struct device *dev); + int (*disconnect)(struct device *dev); + int (*attention)(struct device *dev); +}; + +/** + * dp_hpd_get() - setup hpd module + * + * @dev: device instance of the caller + * @cb: struct containing callback function pointers. + * + * This function allows the client to initialize the usbpd + * module. The module will communicate with HPD module. + */ +struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb); + +int dp_hpd_register(struct dp_usbpd *dp_usbpd); +void dp_hpd_unregister(struct dp_usbpd *dp_usbpd); + +#endif /* _DP_HPD_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c new file mode 100644 index 0000000..b7869db --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -0,0 +1,1216 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include "dp_link.h" +#include "dp_panel.h" + +#define DP_TEST_REQUEST_MASK 0x7F + +enum audio_sample_rate { + AUDIO_SAMPLE_RATE_32_KHZ = 0x00, + AUDIO_SAMPLE_RATE_44_1_KHZ = 0x01, + AUDIO_SAMPLE_RATE_48_KHZ = 0x02, + AUDIO_SAMPLE_RATE_88_2_KHZ = 0x03, + AUDIO_SAMPLE_RATE_96_KHZ = 0x04, + AUDIO_SAMPLE_RATE_176_4_KHZ = 0x05, + AUDIO_SAMPLE_RATE_192_KHZ = 0x06, +}; + +enum audio_pattern_type { + AUDIO_TEST_PATTERN_OPERATOR_DEFINED = 0x00, + AUDIO_TEST_PATTERN_SAWTOOTH = 0x01, +}; + +struct dp_link_request { + u32 test_requested; + u32 test_link_rate; + u32 test_lane_count; +}; + +struct dp_link_private { + u32 prev_sink_count; + struct device *dev; + struct dp_aux *aux; + struct dp_link dp_link; + + struct dp_link_request request; + struct mutex test_response_mutex; + struct mutex psm_mutex; + u8 link_status[DP_LINK_STATUS_SIZE]; +}; + +static int dp_aux_link_power_up(struct drm_dp_aux *aux, + struct dp_link_info *link) +{ + u8 value; + int err; + + if (link->revision < 0x11) + return 0; + + err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value); + if (err < 0) + return err; + + value &= ~DP_SET_POWER_MASK; + value |= DP_SET_POWER_D0; + + err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value); + if (err < 0) + return err; + + usleep_range(1000, 2000); + + return 0; +} + +static int dp_aux_link_power_down(struct drm_dp_aux *aux, + struct dp_link_info *link) +{ + u8 value; + int err; + + if (link->revision < 0x11) + return 0; + + err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value); + if (err < 0) + return err; + + value &= ~DP_SET_POWER_MASK; + value |= DP_SET_POWER_D3; + + err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value); + if (err < 0) + return err; + + return 0; +} + +static int dp_link_get_period(struct dp_link_private *link, int const addr) +{ + int ret = 0; + u8 data; + u32 const max_audio_period = 0xA; + + /* TEST_AUDIO_PERIOD_CH_XX */ + if (drm_dp_dpcd_readb(link->aux->drm_aux, addr, &data) < 0) { + DRM_ERROR("failed to read test_audio_period (0x%x)\n", addr); + ret = -EINVAL; + goto exit; + } + + /* Period - Bits 3:0 */ + data = data & 0xF; + if ((int)data > max_audio_period) { + DRM_ERROR("invalid test_audio_period_ch_1 = 0x%x\n", data); + ret = -EINVAL; + goto exit; + } + + ret = data; +exit: + return ret; +} + +static int dp_link_parse_audio_channel_period(struct dp_link_private *link) +{ + int ret = 0; + struct dp_link_test_audio *req = &link->dp_link.test_audio; + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH1); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_1 = ret; + DRM_DEBUG_DP("test_audio_period_ch_1 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH2); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_2 = ret; + DRM_DEBUG_DP("test_audio_period_ch_2 = 0x%x\n", ret); + + /* TEST_AUDIO_PERIOD_CH_3 (Byte 0x275) */ + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH3); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_3 = ret; + DRM_DEBUG_DP("test_audio_period_ch_3 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH4); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_4 = ret; + DRM_DEBUG_DP("test_audio_period_ch_4 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH5); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_5 = ret; + DRM_DEBUG_DP("test_audio_period_ch_5 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH6); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_6 = ret; + DRM_DEBUG_DP("test_audio_period_ch_6 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH7); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_7 = ret; + DRM_DEBUG_DP("test_audio_period_ch_7 = 0x%x\n", ret); + + ret = dp_link_get_period(link, DP_TEST_AUDIO_PERIOD_CH8); + if (ret == -EINVAL) + goto exit; + + req->test_audio_period_ch_8 = ret; + DRM_DEBUG_DP("test_audio_period_ch_8 = 0x%x\n", ret); +exit: + return ret; +} + +static int dp_link_parse_audio_pattern_type(struct dp_link_private *link) +{ + int ret = 0; + u8 data; + ssize_t rlen; + int const max_audio_pattern_type = 0x1; + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, + DP_TEST_AUDIO_PATTERN_TYPE, &data); + if (rlen < 0) { + DRM_ERROR("failed to read link audio mode. rlen=%zd\n", rlen); + return rlen; + } + + /* Audio Pattern Type - Bits 7:0 */ + if ((int)data > max_audio_pattern_type) { + DRM_ERROR("invalid audio pattern type = 0x%x\n", data); + ret = -EINVAL; + goto exit; + } + + link->dp_link.test_audio.test_audio_pattern_type = data; + DRM_DEBUG_DP("audio pattern type = 0x%x\n", data); +exit: + return ret; +} + +static int dp_link_parse_audio_mode(struct dp_link_private *link) +{ + int ret = 0; + u8 data; + ssize_t rlen; + int const max_audio_sampling_rate = 0x6; + int const max_audio_channel_count = 0x8; + int sampling_rate = 0x0; + int channel_count = 0x0; + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_AUDIO_MODE, &data); + if (rlen < 0) { + DRM_ERROR("failed to read link audio mode. rlen=%zd\n", rlen); + return rlen; + } + + /* Sampling Rate - Bits 3:0 */ + sampling_rate = data & 0xF; + if (sampling_rate > max_audio_sampling_rate) { + DRM_ERROR("sampling rate (0x%x) greater than max (0x%x)\n", + sampling_rate, max_audio_sampling_rate); + ret = -EINVAL; + goto exit; + } + + /* Channel Count - Bits 7:4 */ + channel_count = ((data & 0xF0) >> 4) + 1; + if (channel_count > max_audio_channel_count) { + DRM_ERROR("channel_count (0x%x) greater than max (0x%x)\n", + channel_count, max_audio_channel_count); + ret = -EINVAL; + goto exit; + } + + link->dp_link.test_audio.test_audio_sampling_rate = sampling_rate; + link->dp_link.test_audio.test_audio_channel_count = channel_count; + DRM_DEBUG_DP("sampling_rate = 0x%x, channel_count = 0x%x\n", + sampling_rate, channel_count); +exit: + return ret; +} + +static int dp_link_parse_audio_pattern_params(struct dp_link_private *link) +{ + int ret = 0; + + ret = dp_link_parse_audio_mode(link); + if (ret) + goto exit; + + ret = dp_link_parse_audio_pattern_type(link); + if (ret) + goto exit; + + ret = dp_link_parse_audio_channel_period(link); + +exit: + return ret; +} + +static bool dp_link_is_video_pattern_valid(u32 pattern) +{ + switch (pattern) { + case DP_NO_TEST_PATTERN: + case DP_COLOR_RAMP: + case DP_BLACK_AND_WHITE_VERTICAL_LINES: + case DP_COLOR_SQUARE: + return true; + default: + return false; + } +} + +/** + * dp_link_is_bit_depth_valid() - validates the bit depth requested + * @bit_depth: bit depth requested by the sink + * + * Returns true if the requested bit depth is supported. + */ +static bool dp_link_is_bit_depth_valid(u32 tbd) +{ + /* DP_TEST_VIDEO_PATTERN_NONE is treated as invalid */ + switch (tbd) { + case DP_TEST_BIT_DEPTH_6: + case DP_TEST_BIT_DEPTH_8: + case DP_TEST_BIT_DEPTH_10: + return true; + default: + return false; + } +} + +static int dp_link_parse_timing_params1(struct dp_link_private *link, + int addr, int len, u32 *val) +{ + u8 bp[2]; + int rlen; + + if (len != 2) + return -EINVAL; + + /* Read the requested video link pattern (Byte 0x221). */ + rlen = drm_dp_dpcd_read(link->aux->drm_aux, addr, bp, len); + if (rlen < len) { + DRM_ERROR("failed to read 0x%x\n", addr); + return -EINVAL; + } + + *val = bp[1] | (bp[0] << 8); + + return 0; +} + +static int dp_link_parse_timing_params2(struct dp_link_private *link, + int addr, int len, + u32 *val1, u32 *val2) +{ + u8 bp[2]; + int rlen; + + if (len != 2) + return -EINVAL; + + /* Read the requested video link pattern (Byte 0x221). */ + rlen = drm_dp_dpcd_read(link->aux->drm_aux, addr, bp, len); + if (rlen < len) { + DRM_ERROR("failed to read 0x%x\n", addr); + return -EINVAL; + } + + *val1 = (bp[0] & BIT(7)) >> 7; + *val2 = bp[1] | ((bp[0] & 0x7F) << 8); + + return 0; +} + +static int dp_link_parse_timing_params3(struct dp_link_private *link, + int addr, u32 *val) +{ + u8 bp; + u32 len = 1; + int rlen; + + rlen = drm_dp_dpcd_read(link->aux->drm_aux, addr, &bp, len); + if (rlen < 1) { + DRM_ERROR("failed to read 0x%x\n", addr); + return -EINVAL; + } + *val = bp; + + return 0; +} + +/** + * dp_parse_video_pattern_params() - parses video pattern parameters from DPCD + * @link: Display Port Driver data + * + * Returns 0 if it successfully parses the video link pattern and the link + * bit depth requested by the sink and, and if the values parsed are valid. + */ +static int dp_link_parse_video_pattern_params(struct dp_link_private *link) +{ + int ret = 0; + ssize_t rlen; + u8 bp; + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_PATTERN, &bp); + if (rlen < 0) { + DRM_ERROR("failed to read link video pattern. rlen=%zd\n", + rlen); + return rlen; + } + + if (!dp_link_is_video_pattern_valid(bp)) { + DRM_ERROR("invalid link video pattern = 0x%x\n", bp); + ret = -EINVAL; + return ret; + } + + link->dp_link.test_video.test_video_pattern = bp; + + /* Read the requested color bit depth and dynamic range (Byte 0x232) */ + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_MISC0, &bp); + if (rlen < 0) { + DRM_ERROR("failed to read link bit depth. rlen=%zd\n", rlen); + return rlen; + } + + /* Dynamic Range */ + link->dp_link.test_video.test_dyn_range = + (bp & DP_TEST_DYNAMIC_RANGE_CEA); + + /* Color bit depth */ + bp &= DP_TEST_BIT_DEPTH_MASK; + if (!dp_link_is_bit_depth_valid(bp)) { + DRM_ERROR("invalid link bit depth = 0x%x\n", bp); + ret = -EINVAL; + return ret; + } + + link->dp_link.test_video.test_bit_depth = bp; + + /* resolution timing params */ + ret = dp_link_parse_timing_params1(link, DP_TEST_H_TOTAL_HI, 2, + &link->dp_link.test_video.test_h_total); + if (ret) { + DRM_ERROR("failed to parse test_htotal(DP_TEST_H_TOTAL_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params1(link, DP_TEST_V_TOTAL_HI, 2, + &link->dp_link.test_video.test_v_total); + if (ret) { + DRM_ERROR("failed to parse test_v_total(DP_TEST_V_TOTAL_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params1(link, DP_TEST_H_START_HI, 2, + &link->dp_link.test_video.test_h_start); + if (ret) { + DRM_ERROR("failed to parse test_h_start(DP_TEST_H_START_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params1(link, DP_TEST_V_START_HI, 2, + &link->dp_link.test_video.test_v_start); + if (ret) { + DRM_ERROR("failed to parse test_v_start(DP_TEST_V_START_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params2(link, DP_TEST_HSYNC_HI, 2, + &link->dp_link.test_video.test_hsync_pol, + &link->dp_link.test_video.test_hsync_width); + if (ret) { + DRM_ERROR("failed to parse (DP_TEST_HSYNC_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params2(link, DP_TEST_VSYNC_HI, 2, + &link->dp_link.test_video.test_vsync_pol, + &link->dp_link.test_video.test_vsync_width); + if (ret) { + DRM_ERROR("failed to parse (DP_TEST_VSYNC_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params1(link, DP_TEST_H_WIDTH_HI, 2, + &link->dp_link.test_video.test_h_width); + if (ret) { + DRM_ERROR("failed to parse test_h_width(DP_TEST_H_WIDTH_HI)\n"); + return ret; + } + + ret = dp_link_parse_timing_params1(link, DP_TEST_V_HEIGHT_HI, 2, + &link->dp_link.test_video.test_v_height); + if (ret) { + DRM_ERROR("failed to parse test_v_height\n"); + return ret; + } + + ret = dp_link_parse_timing_params3(link, DP_TEST_MISC1, + &link->dp_link.test_video.test_rr_d); + link->dp_link.test_video.test_rr_d &= DP_TEST_REFRESH_DENOMINATOR; + if (ret) { + DRM_ERROR("failed to parse test_rr_d (DP_TEST_MISC1)\n"); + return ret; + } + + ret = dp_link_parse_timing_params3(link, DP_TEST_REFRESH_RATE_NUMERATOR, + &link->dp_link.test_video.test_rr_n); + if (ret) { + DRM_ERROR("failed to parse test_rr_n\n"); + return ret; + } + + DRM_DEBUG_DP("link video pattern = 0x%x\n" + "link dynamic range = 0x%x\n" + "link bit depth = 0x%x\n" + "TEST_H_TOTAL = %d, TEST_V_TOTAL = %d\n" + "TEST_H_START = %d, TEST_V_START = %d\n" + "TEST_HSYNC_POL = %d\n" + "TEST_HSYNC_WIDTH = %d\n" + "TEST_VSYNC_POL = %d\n" + "TEST_VSYNC_WIDTH = %d\n" + "TEST_H_WIDTH = %d\n" + "TEST_V_HEIGHT = %d\n" + "TEST_REFRESH_DENOMINATOR = %d\n" + "TEST_REFRESH_NUMERATOR = %d\n", + link->dp_link.test_video.test_video_pattern, + link->dp_link.test_video.test_dyn_range, + link->dp_link.test_video.test_bit_depth, + link->dp_link.test_video.test_h_total, + link->dp_link.test_video.test_v_total, + link->dp_link.test_video.test_h_start, + link->dp_link.test_video.test_v_start, + link->dp_link.test_video.test_hsync_pol, + link->dp_link.test_video.test_hsync_width, + link->dp_link.test_video.test_vsync_pol, + link->dp_link.test_video.test_vsync_width, + link->dp_link.test_video.test_h_width, + link->dp_link.test_video.test_v_height, + link->dp_link.test_video.test_rr_d, + link->dp_link.test_video.test_rr_n); + + return ret; +} + +/** + * dp_link_parse_link_training_params() - parses link training parameters from + * DPCD + * @link: Display Port Driver data + * + * Returns 0 if it successfully parses the link rate (Byte 0x219) and lane + * count (Byte 0x220), and if these values parse are valid. + */ +static int dp_link_parse_link_training_params(struct dp_link_private *link) +{ + u8 bp; + ssize_t rlen; + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_LINK_RATE, &bp); + if (rlen < 0) { + DRM_ERROR("failed to read link rate. rlen=%zd\n", rlen); + return rlen; + } + + if (!is_link_rate_valid(bp)) { + DRM_ERROR("invalid link rate = 0x%x\n", bp); + return -EINVAL; + } + + link->request.test_link_rate = bp; + DRM_DEBUG_DP("link rate = 0x%x\n", link->request.test_link_rate); + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_LANE_COUNT, &bp); + if (rlen < 0) { + DRM_ERROR("failed to read lane count. rlen=%zd\n", rlen); + return rlen; + } + bp &= DP_MAX_LANE_COUNT_MASK; + + if (!is_lane_count_valid(bp)) { + DRM_ERROR("invalid lane count = 0x%x\n", bp); + return -EINVAL; + } + + link->request.test_lane_count = bp; + DRM_DEBUG_DP("lane count = 0x%x\n", link->request.test_lane_count); + return 0; +} + +/** + * dp_parse_phy_test_params() - parses the phy link parameters + * @link: Display Port Driver data + * + * Parses the DPCD (Byte 0x248) for the DP PHY link pattern that is being + * requested. + */ +static int dp_link_parse_phy_test_params(struct dp_link_private *link) +{ + u8 data; + ssize_t rlen; + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_PHY_PATTERN, + &data); + if (rlen < 0) { + DRM_ERROR("failed to read phy link pattern. rlen=%zd\n", rlen); + return rlen; + } + + link->dp_link.phy_params.phy_test_pattern_sel = data; + + DRM_DEBUG_DP("phy_test_pattern_sel = 0x%x\n", data); + + switch (data) { + case DP_LINK_QUAL_PATTERN_DISABLE: + case DP_LINK_QUAL_PATTERN_D10_2: + case DP_LINK_QUAL_PATTERN_ERROR_RATE: + case DP_LINK_QUAL_PATTERN_PRBS7: + case DP_LINK_QUAL_PATTERN_80BIT_CUSTOM: + case DP_LINK_QUAL_PATTERN_HBR2_EYE: + return 0; + default: + return -EINVAL; + } +} + +/** + * dp_link_is_video_audio_test_requested() - checks for audio/video link request + * @link: link requested by the sink + * + * Returns true if the requested link is a permitted audio/video link. + */ +static bool dp_link_is_video_audio_test_requested(u32 link) +{ + u8 video_audio_test = (DP_TEST_LINK_VIDEO_PATTERN | + DP_TEST_LINK_AUDIO_PATTERN | + DP_TEST_LINK_AUDIO_DISABLED_VIDEO); + + return ((link & video_audio_test) && + !(link & ~video_audio_test)); +} + +/** + * dp_link_parse_request() - parses link request parameters from sink + * @link: Display Port Driver data + * + * Parses the DPCD to check if an automated link is requested (Byte 0x201), + * and what type of link automation is being requested (Byte 0x218). + */ +static int dp_link_parse_request(struct dp_link_private *link) +{ + int ret = 0; + u8 data; + ssize_t rlen; + + /** + * Read the device service IRQ vector (Byte 0x201) to determine + * whether an automated link has been requested by the sink. + */ + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, + DP_DEVICE_SERVICE_IRQ_VECTOR, &data); + if (rlen < 0) { + DRM_ERROR("aux read failed. rlen=%zd\n", rlen); + return rlen; + } + + DRM_DEBUG_DP("device service irq vector = 0x%x\n", data); + + if (!(data & DP_AUTOMATED_TEST_REQUEST)) { + DRM_DEBUG_DP("no test requested\n"); + return 0; + } + + /** + * Read the link request byte (Byte 0x218) to determine what type + * of automated link has been requested by the sink. + */ + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_TEST_REQUEST, &data); + if (rlen < 0) { + DRM_ERROR("aux read failed. rlen=%zd\n", rlen); + return rlen; + } + + if (!data || (data == DP_TEST_LINK_FAUX_PATTERN)) { + DRM_DEBUG_DP("link 0x%x not supported\n", data); + goto end; + } + + DRM_DEBUG_DP("Test:(0x%x) requested\n", data); + link->request.test_requested = data; + + if (link->request.test_requested == DP_TEST_LINK_PHY_TEST_PATTERN) { + ret = dp_link_parse_phy_test_params(link); + if (ret) + goto end; + ret = dp_link_parse_link_training_params(link); + if (ret) + goto end; + } + + if (link->request.test_requested == DP_TEST_LINK_TRAINING) { + ret = dp_link_parse_link_training_params(link); + if (ret) + goto end; + } + + if (dp_link_is_video_audio_test_requested( + link->request.test_requested)) { + ret = dp_link_parse_video_pattern_params(link); + if (ret) + goto end; + + ret = dp_link_parse_audio_pattern_params(link); + } +end: + /* + * Send a DP_TEST_ACK if all link parameters are valid, otherwise send + * a DP_TEST_NAK. + */ + if (ret) { + link->dp_link.test_response = DP_TEST_NAK; + } else { + if (link->request.test_requested != DP_TEST_LINK_EDID_READ) + link->dp_link.test_response = DP_TEST_ACK; + else + link->dp_link.test_response = + DP_TEST_EDID_CHECKSUM_WRITE; + } + + return ret; +} + +/** + * dp_link_parse_sink_count() - parses the sink count + * + * Parses the DPCD to check if there is an update to the sink count + * (Byte 0x200), and whether all the sink devices connected have Content + * Protection enabled. + */ +static int dp_link_parse_sink_count(struct dp_link *dp_link) +{ + ssize_t rlen; + bool cp_ready; + + struct dp_link_private *link = container_of(dp_link, + struct dp_link_private, dp_link); + + rlen = drm_dp_dpcd_readb(link->aux->drm_aux, DP_SINK_COUNT, + &link->dp_link.sink_count); + if (rlen < 0) { + DRM_ERROR("sink count read failed. rlen=%zd\n", rlen); + return rlen; + } + + cp_ready = link->dp_link.sink_count & DP_SINK_CP_READY; + + link->dp_link.sink_count = + DP_GET_SINK_COUNT(link->dp_link.sink_count); + + DRM_DEBUG_DP("sink_count = 0x%x, cp_ready = 0x%x\n", + link->dp_link.sink_count, cp_ready); + return 0; +} + +static void dp_link_parse_sink_status_field(struct dp_link_private *link) +{ + int len = 0; + + link->prev_sink_count = link->dp_link.sink_count; + dp_link_parse_sink_count(&link->dp_link); + + len = drm_dp_dpcd_read_link_status(link->aux->drm_aux, + link->link_status); + if (len < DP_LINK_STATUS_SIZE) + DRM_ERROR("DP link status read failed\n"); + dp_link_parse_request(link); +} + +/** + * dp_link_process_link_training_request() - processes new training requests + * @link: Display Port link data + * + * This function will handle new link training requests that are initiated by + * the sink. In particular, it will update the requested lane count and link + * link rate, and then trigger the link retraining procedure. + * + * The function will return 0 if a link training request has been processed, + * otherwise it will return -EINVAL. + */ +static int dp_link_process_link_training_request(struct dp_link_private *link) +{ + if (link->request.test_requested != DP_TEST_LINK_TRAINING) + return -EINVAL; + + DRM_DEBUG_DP("Test:0x%x link rate = 0x%x, lane count = 0x%x\n", + DP_TEST_LINK_TRAINING, + link->request.test_link_rate, + link->request.test_lane_count); + + link->dp_link.link_params.num_lanes = link->request.test_lane_count; + link->dp_link.link_params.rate = link->request.test_link_rate; + + return 0; +} + +bool dp_link_send_test_response(struct dp_link *dp_link) +{ + struct dp_link_private *link = NULL; + int ret = 0; + + if (!dp_link) { + DRM_ERROR("invalid input\n"); + return false; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + mutex_lock(&link->test_response_mutex); + ret = drm_dp_dpcd_writeb(link->aux->drm_aux, DP_TEST_RESPONSE, + dp_link->test_response); + mutex_unlock(&link->test_response_mutex); + + return ret == 1; +} + +int dp_link_psm_config(struct dp_link *dp_link, + struct dp_link_info *link_info, bool enable) +{ + struct dp_link_private *link = NULL; + int ret = 0; + + if (!dp_link) { + DRM_ERROR("invalid params\n"); + return -EINVAL; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + mutex_lock(&link->psm_mutex); + if (enable) + ret = dp_aux_link_power_down(link->aux->drm_aux, link_info); + else + ret = dp_aux_link_power_up(link->aux->drm_aux, link_info); + + if (ret) + DRM_ERROR("Failed to %s low power mode\n", enable ? + "enter" : "exit"); + else + dp_link->psm_enabled = enable; + + mutex_unlock(&link->psm_mutex); + return ret; +} + +bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum) +{ + struct dp_link_private *link = NULL; + int ret = 0; + + if (!dp_link) { + DRM_ERROR("invalid input\n"); + return false; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + ret = drm_dp_dpcd_writeb(link->aux->drm_aux, DP_TEST_EDID_CHECKSUM, + checksum); + return ret == 1; +} + +static int dp_link_parse_vx_px(struct dp_link_private *link) +{ + int ret = 0; + + DRM_DEBUG_DP("vx: 0=%d, 1=%d, 2=%d, 3=%d\n", + drm_dp_get_adjust_request_voltage(link->link_status, 0), + drm_dp_get_adjust_request_voltage(link->link_status, 1), + drm_dp_get_adjust_request_voltage(link->link_status, 2), + drm_dp_get_adjust_request_voltage(link->link_status, 3)); + + DRM_DEBUG_DP("px: 0=%d, 1=%d, 2=%d, 3=%d\n", + drm_dp_get_adjust_request_pre_emphasis(link->link_status, 0), + drm_dp_get_adjust_request_pre_emphasis(link->link_status, 1), + drm_dp_get_adjust_request_pre_emphasis(link->link_status, 2), + drm_dp_get_adjust_request_pre_emphasis(link->link_status, 3)); + + /** + * Update the voltage and pre-emphasis levels as per DPCD request + * vector. + */ + DRM_DEBUG_DP("Current: v_level = 0x%x, p_level = 0x%x\n", + link->dp_link.phy_params.v_level, + link->dp_link.phy_params.p_level); + link->dp_link.phy_params.v_level = + drm_dp_get_adjust_request_voltage(link->link_status, 0); + link->dp_link.phy_params.p_level = + drm_dp_get_adjust_request_pre_emphasis(link->link_status, 0); + DRM_DEBUG_DP("Requested: v_level = 0x%x, p_level = 0x%x\n", + link->dp_link.phy_params.v_level, + link->dp_link.phy_params.p_level); + + return ret; +} + +/** + * dp_link_process_phy_test_pattern_request() - process new phy link requests + * @link: Display Port Driver data + * + * This function will handle new phy link pattern requests that are initiated + * by the sink. The function will return 0 if a phy link pattern has been + * processed, otherwise it will return -EINVAL. + */ +static int dp_link_process_phy_test_pattern_request( + struct dp_link_private *link) +{ + int ret = 0; + + if (!(link->request.test_requested & DP_TEST_LINK_PHY_TEST_PATTERN)) { + DRM_DEBUG_DP("no phy test\n"); + return -EINVAL; + } + + if (!is_link_rate_valid(link->request.test_link_rate) || + !is_lane_count_valid(link->request.test_lane_count)) { + DRM_ERROR("Invalid: link rate = 0x%x,lane count = 0x%x\n", + link->request.test_link_rate, + link->request.test_lane_count); + return -EINVAL; + } + + DRM_DEBUG_DP("Current: rate = 0x%x, lane count = 0x%x\n", + link->dp_link.link_params.rate, + link->dp_link.link_params.num_lanes); + + DRM_DEBUG_DP("Requested: rate = 0x%x, lane count = 0x%x\n", + link->request.test_link_rate, + link->request.test_lane_count); + + link->dp_link.link_params.num_lanes = link->request.test_lane_count; + link->dp_link.link_params.rate = link->request.test_link_rate; + + ret = dp_link_parse_vx_px(link); + + if (ret) + DRM_ERROR("parse_vx_px failed. ret=%d\n", ret); + + return ret; +} + +static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) +{ + return link_status[r - DP_LANE0_1_STATUS]; +} + +/** + * dp_link_process_link_status_update() - processes link status updates + * @link: Display Port link module data + * + * This function will check for changes in the link status, e.g. clock + * recovery done on all lanes, and trigger link training if there is a + * failure/error on the link. + * + * The function will return 0 if the a link status update has been processed, + * otherwise it will return -EINVAL. + */ +static int dp_link_process_link_status_update(struct dp_link_private *link) +{ + if (!(get_link_status(link->link_status, + DP_LANE_ALIGN_STATUS_UPDATED) & + DP_LINK_STATUS_UPDATED) || + (drm_dp_clock_recovery_ok(link->link_status, + link->dp_link.link_params.num_lanes) && + drm_dp_channel_eq_ok(link->link_status, + link->dp_link.link_params.num_lanes))) + return -EINVAL; + + DRM_DEBUG_DP("channel_eq_done = %d, clock_recovery_done = %d\n", + drm_dp_clock_recovery_ok(link->link_status, + link->dp_link.link_params.num_lanes), + drm_dp_clock_recovery_ok(link->link_status, + link->dp_link.link_params.num_lanes)); + + return 0; +} + +/** + * dp_link_process_downstream_port_status_change() - process port status changes + * @link: Display Port Driver data + * + * This function will handle downstream port updates that are initiated by + * the sink. If the downstream port status has changed, the EDID is read via + * AUX. + * + * The function will return 0 if a downstream port update has been + * processed, otherwise it will return -EINVAL. + */ +static int dp_link_process_ds_port_status_change(struct dp_link_private *link) +{ + if (get_link_status(link->link_status, DP_LANE_ALIGN_STATUS_UPDATED) & + DP_DOWNSTREAM_PORT_STATUS_CHANGED) + goto reset; + + if (link->prev_sink_count == link->dp_link.sink_count) + return -EINVAL; + +reset: + /* reset prev_sink_count */ + link->prev_sink_count = link->dp_link.sink_count; + + return 0; +} + +static bool dp_link_is_video_pattern_requested(struct dp_link_private *link) +{ + return (link->request.test_requested & DP_TEST_LINK_VIDEO_PATTERN) + && !(link->request.test_requested & + DP_TEST_LINK_AUDIO_DISABLED_VIDEO); +} + +static bool dp_link_is_audio_pattern_requested(struct dp_link_private *link) +{ + return (link->request.test_requested & DP_TEST_LINK_AUDIO_PATTERN); +} + +static void dp_link_reset_data(struct dp_link_private *link) +{ + link->request = (const struct dp_link_request){ 0 }; + link->dp_link.test_video = (const struct dp_link_test_video){ 0 }; + link->dp_link.test_video.test_bit_depth = DP_TEST_BIT_DEPTH_UNKNOWN; + link->dp_link.test_audio = (const struct dp_link_test_audio){ 0 }; + link->dp_link.phy_params.phy_test_pattern_sel = 0; + link->dp_link.sink_request = 0; + link->dp_link.test_response = 0; +} + +/** + * dp_link_process_request() - handle HPD IRQ transition to HIGH + * @link: pointer to link module data + * + * This function will handle the HPD IRQ state transitions from LOW to HIGH + * (including cases when there are back to back HPD IRQ HIGH) indicating + * the start of a new link training request or sink status update. + */ +int dp_link_process_request(struct dp_link *dp_link) +{ + int ret = 0; + struct dp_link_private *link; + + if (!dp_link) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + mutex_lock(&link->test_response_mutex); + dp_link_reset_data(link); + + dp_link_parse_sink_status_field(link); + mutex_unlock(&link->test_response_mutex); + + if (link->request.test_requested == DP_TEST_LINK_EDID_READ) { + dp_link->sink_request |= DP_TEST_LINK_EDID_READ; + return ret; + } + + ret = dp_link_process_ds_port_status_change(link); + if (!ret) { + dp_link->sink_request |= DS_PORT_STATUS_CHANGED; + return ret; + } + + ret = dp_link_process_link_training_request(link); + if (!ret) { + dp_link->sink_request |= DP_TEST_LINK_TRAINING; + return ret; + } + + ret = dp_link_process_phy_test_pattern_request(link); + if (!ret) { + dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; + return ret; + } + + ret = dp_link_process_link_status_update(link); + if (!ret) { + dp_link->sink_request |= DP_LINK_STATUS_UPDATED; + return ret; + } + + if (dp_link_is_video_pattern_requested(link)) { + dp_link->sink_request |= DP_TEST_LINK_VIDEO_PATTERN; + return -EINVAL; + } + + if (dp_link_is_audio_pattern_requested(link)) { + dp_link->sink_request |= DP_TEST_LINK_AUDIO_PATTERN; + return -EINVAL; + } + + return ret; +} + +int dp_link_get_colorimetry_config(struct dp_link *dp_link) +{ + u32 cc; + struct dp_link_private *link; + + if (!dp_link) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + /* + * Unless a video pattern CTS test is ongoing, use RGB_VESA + * Only RGB_VESA and RGB_CEA supported for now + */ + if (dp_link_is_video_pattern_requested(link)) + cc = link->dp_link.test_video.test_dyn_range; + else + cc = DP_TEST_DYNAMIC_RANGE_VESA; + + return cc; +} + +int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status) +{ + int i; + int v_max = 0, p_max = 0; + struct dp_link_private *link; + + if (!dp_link) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + link = container_of(dp_link, struct dp_link_private, dp_link); + + /* use the max level across lanes */ + for (i = 0; i < dp_link->link_params.num_lanes; i++) { + u8 data_v = drm_dp_get_adjust_request_voltage(link_status, i); + u8 data_p = drm_dp_get_adjust_request_pre_emphasis(link_status, + i); + DRM_DEBUG_DP("lane=%d req_vol_swing=%d req_pre_emphasis=%d\n", + i, data_v, data_p); + if (v_max < data_v) + v_max = data_v; + if (p_max < data_p) + p_max = data_p; + } + + dp_link->phy_params.v_level = v_max >> DP_TRAIN_VOLTAGE_SWING_SHIFT; + dp_link->phy_params.p_level = p_max >> DP_TRAIN_PRE_EMPHASIS_SHIFT; + + /** + * Adjust the voltage swing and pre-emphasis level combination to within + * the allowable range. + */ + if (dp_link->phy_params.v_level > DP_TRAIN_VOLTAGE_SWING_MAX) { + DRM_DEBUG_DP("Requested vSwingLevel=%d, change to %d\n", + dp_link->phy_params.v_level, + DP_TRAIN_VOLTAGE_SWING_MAX); + dp_link->phy_params.v_level = DP_TRAIN_VOLTAGE_SWING_MAX; + } + + if (dp_link->phy_params.p_level > DP_TRAIN_PRE_EMPHASIS_MAX) { + DRM_DEBUG_DP("Requested preEmphasisLevel=%d, change to %d\n", + dp_link->phy_params.p_level, + DP_TRAIN_PRE_EMPHASIS_MAX); + dp_link->phy_params.p_level = DP_TRAIN_PRE_EMPHASIS_MAX; + } + + if ((dp_link->phy_params.p_level > DP_TRAIN_PRE_EMPHASIS_LVL_1) + && (dp_link->phy_params.v_level == + DP_TRAIN_VOLTAGE_SWING_LVL_2)) { + DRM_DEBUG_DP("Requested preEmphasisLevel=%d, change to %d\n", + dp_link->phy_params.p_level, + DP_TRAIN_PRE_EMPHASIS_LVL_1); + dp_link->phy_params.p_level = DP_TRAIN_PRE_EMPHASIS_LVL_1; + } + + DRM_DEBUG_DP("adjusted: v_level=%d, p_level=%d\n", + dp_link->phy_params.v_level, dp_link->phy_params.p_level); + + return 0; +} + +u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp) +{ + u32 tbd; + + /* + * Few simplistic rules and assumptions made here: + * 1. Test bit depth is bit depth per color component + * 2. Assume 3 color components + */ + switch (bpp) { + case 18: + tbd = DP_TEST_BIT_DEPTH_6; + break; + case 24: + tbd = DP_TEST_BIT_DEPTH_8; + break; + case 30: + tbd = DP_TEST_BIT_DEPTH_10; + break; + default: + tbd = DP_TEST_BIT_DEPTH_UNKNOWN; + break; + } + + if (tbd != DP_TEST_BIT_DEPTH_UNKNOWN) + tbd = (tbd >> DP_TEST_BIT_DEPTH_SHIFT); + + return tbd; +} + +struct dp_link *dp_link_get(struct device *dev, struct dp_aux *aux) +{ + struct dp_link_private *link; + struct dp_link *dp_link; + + if (!dev || !aux) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + link = devm_kzalloc(dev, sizeof(*link), GFP_KERNEL); + if (!link) + return ERR_PTR(-ENOMEM); + + link->dev = dev; + link->aux = aux; + + mutex_init(&link->test_response_mutex); + mutex_init(&link->psm_mutex); + dp_link = &link->dp_link; + + return dp_link; +} diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h new file mode 100644 index 0000000..265b183 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_link.h @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_LINK_H_ +#define _DP_LINK_H_ + +#include "dp_aux.h" + +#define DS_PORT_STATUS_CHANGED 0x200 +#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF +#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0) + +struct dp_link_info { + unsigned char revision; + unsigned int rate; + unsigned int num_lanes; + unsigned long capabilities; +}; + +enum dp_link_voltage_level { + DP_TRAIN_VOLTAGE_SWING_LVL_0 = 0, + DP_TRAIN_VOLTAGE_SWING_LVL_1 = 1, + DP_TRAIN_VOLTAGE_SWING_LVL_2 = 2, + DP_TRAIN_VOLTAGE_SWING_MAX = DP_TRAIN_VOLTAGE_SWING_LVL_2, +}; + +enum dp_link_preemaphasis_level { + DP_TRAIN_PRE_EMPHASIS_LVL_0 = 0, + DP_TRAIN_PRE_EMPHASIS_LVL_1 = 1, + DP_TRAIN_PRE_EMPHASIS_LVL_2 = 2, + DP_TRAIN_PRE_EMPHASIS_MAX = DP_TRAIN_PRE_EMPHASIS_LVL_2, +}; + +struct dp_link_test_video { + u32 test_video_pattern; + u32 test_bit_depth; + u32 test_dyn_range; + u32 test_h_total; + u32 test_v_total; + u32 test_h_start; + u32 test_v_start; + u32 test_hsync_pol; + u32 test_hsync_width; + u32 test_vsync_pol; + u32 test_vsync_width; + u32 test_h_width; + u32 test_v_height; + u32 test_rr_d; + u32 test_rr_n; +}; + +struct dp_link_test_audio { + u32 test_audio_sampling_rate; + u32 test_audio_channel_count; + u32 test_audio_pattern_type; + u32 test_audio_period_ch_1; + u32 test_audio_period_ch_2; + u32 test_audio_period_ch_3; + u32 test_audio_period_ch_4; + u32 test_audio_period_ch_5; + u32 test_audio_period_ch_6; + u32 test_audio_period_ch_7; + u32 test_audio_period_ch_8; +}; + +struct dp_link_phy_params { + u32 phy_test_pattern_sel; + u8 v_level; + u8 p_level; +}; + +struct dp_link { + u32 sink_request; + u32 test_response; + bool psm_enabled; + + u8 sink_count; + struct dp_link_test_video test_video; + struct dp_link_test_audio test_audio; + struct dp_link_phy_params phy_params; + struct dp_link_info link_params; +}; + +/** + * mdss_dp_test_bit_depth_to_bpp() - convert test bit depth to bpp + * @tbd: test bit depth + * + * Returns the bits per pixel (bpp) to be used corresponding to the + * git bit depth value. This function assumes that bit depth has + * already been validated. + */ +static inline u32 dp_link_bit_depth_to_bpp(u32 tbd) +{ + /* + * Few simplistic rules and assumptions made here: + * 1. Bit depth is per color component + * 2. If bit depth is unknown return 0 + * 3. Assume 3 color components + */ + switch (tbd) { + case DP_TEST_BIT_DEPTH_6: + return 18; + case DP_TEST_BIT_DEPTH_8: + return 24; + case DP_TEST_BIT_DEPTH_10: + return 30; + case DP_TEST_BIT_DEPTH_UNKNOWN: + default: + return 0; + } +} + +u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp); +int dp_link_process_request(struct dp_link *dp_link); +int dp_link_get_colorimetry_config(struct dp_link *dp_link); +int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status); +bool dp_link_send_test_response(struct dp_link *dp_link); +int dp_link_psm_config(struct dp_link *dp_link, + struct dp_link_info *link_info, bool enable); +bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum); + +/** + * dp_link_get() - get the functionalities of dp test module + * + * + * return: a pointer to dp_link struct + */ +struct dp_link *dp_link_get(struct device *dev, struct dp_aux *aux); + +#endif /* _DP_LINK_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c new file mode 100644 index 0000000..a129924 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -0,0 +1,490 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#include "dp_panel.h" + +#include <drm/drm_connector.h> +#include <drm/drm_edid.h> + +#define DP_MAX_DS_PORT_COUNT 1 + +struct dp_panel_private { + struct device *dev; + struct dp_panel dp_panel; + struct dp_aux *aux; + struct dp_link *link; + struct dp_catalog *catalog; + bool panel_on; + bool aux_cfg_update_done; +}; + +static int dp_panel_read_dpcd(struct dp_panel *dp_panel) +{ + int rc = 0; + size_t rlen; + struct dp_panel_private *panel; + struct dp_link_info *link_info; + u8 *dpcd, major = 0, minor = 0, temp; + u32 dfp_count = 0, offset = DP_DPCD_REV; + + dpcd = dp_panel->dpcd; + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + link_info = &dp_panel->link_info; + + rlen = drm_dp_dpcd_read(panel->aux->drm_aux, + DP_TRAINING_AUX_RD_INTERVAL, &temp, 1); + if (rlen < 0) { + DRM_ERROR("err reading DP_TRAINING_AUX_RD_INTERVAL,rlen=%zd\n", + rlen); + rc = -EINVAL; + goto end; + } + + /* check for EXTENDED_RECEIVER_CAPABILITY_FIELD_PRESENT */ + if (temp & BIT(7)) { + DRM_DEBUG_DP("using EXTENDED_RECEIVER_CAPABILITY_FIELD\n"); + offset = DPRX_EXTENDED_DPCD_FIELD; + } + + rlen = drm_dp_dpcd_read(panel->aux->drm_aux, offset, + dpcd, (DP_RECEIVER_CAP_SIZE + 1)); + if (rlen < (DP_RECEIVER_CAP_SIZE + 1)) { + DRM_ERROR("dpcd read failed, rlen=%zd\n", rlen); + if (rlen == -ETIMEDOUT) + rc = rlen; + else + rc = -EINVAL; + + goto end; + } + + print_hex_dump(KERN_DEBUG, "[drm-dp] SINK DPCD: ", + DUMP_PREFIX_NONE, 8, 1, dp_panel->dpcd, rlen, false); + + link_info->revision = dpcd[DP_DPCD_REV]; + major = (link_info->revision >> 4) & 0x0f; + minor = link_info->revision & 0x0f; + + link_info->rate = drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]); + link_info->num_lanes = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; + + if (link_info->num_lanes > dp_panel->max_dp_lanes) + link_info->num_lanes = dp_panel->max_dp_lanes; + + /* Limit support upto HBR2 until HBR3 support is added */ + if (link_info->rate >= (drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4))) + link_info->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4); + + DRM_DEBUG_DP("version: %d.%d\n", major, minor); + DRM_DEBUG_DP("link_rate=%d\n", link_info->rate); + DRM_DEBUG_DP("lane_count=%d\n", link_info->num_lanes); + + if (drm_dp_enhanced_frame_cap(dpcd)) + link_info->capabilities |= DP_LINK_CAP_ENHANCED_FRAMING; + + dfp_count = dpcd[DP_DOWN_STREAM_PORT_COUNT] & + DP_DOWN_STREAM_PORT_COUNT; + + if (dfp_count > DP_MAX_DS_PORT_COUNT) { + DRM_ERROR("DS port count %d greater that max (%d) supported\n", + dfp_count, DP_MAX_DS_PORT_COUNT); + return -EINVAL; + } +end: + return rc; +} + +static u32 dp_panel_get_supported_bpp(struct dp_panel *dp_panel, + u32 mode_edid_bpp, u32 mode_pclk_khz) +{ + struct dp_link_info *link_info; + const u32 max_supported_bpp = 30, min_supported_bpp = 18; + u32 bpp = 0, data_rate_khz = 0; + + bpp = min_t(u32, mode_edid_bpp, max_supported_bpp); + + link_info = &dp_panel->link_info; + data_rate_khz = link_info->num_lanes * link_info->rate * 8; + + while (bpp > min_supported_bpp) { + if (mode_pclk_khz * bpp <= data_rate_khz) + break; + bpp -= 6; + } + + return bpp; +} + +static void dp_panel_set_test_mode(struct dp_panel_private *panel, + struct dp_display_mode *mode) +{ + struct drm_display_mode *drm_mode = NULL; + struct dp_link_test_video *test_info = NULL; + + drm_mode = &mode->drm_mode; + test_info = &panel->link->test_video; + + drm_mode->hdisplay = test_info->test_h_width; + drm_mode->hsync_start = drm_mode->hdisplay + test_info->test_h_total - + (test_info->test_h_start + test_info->test_h_width); + drm_mode->hsync_end = drm_mode->hsync_start + + test_info->test_hsync_width; + drm_mode->htotal = drm_mode->hsync_end + test_info->test_h_start - + test_info->test_hsync_width; + + drm_mode->vdisplay = test_info->test_v_height; + drm_mode->vsync_start = drm_mode->vdisplay + test_info->test_v_total - + (test_info->test_v_start + test_info->test_v_height); + drm_mode->vsync_end = drm_mode->vsync_start + + test_info->test_vsync_width; + drm_mode->vtotal = drm_mode->vsync_end + test_info->test_v_start - + test_info->test_vsync_width; + + drm_mode->vrefresh = test_info->test_rr_n; + drm_mode->clock = test_info->test_h_total * + test_info->test_v_total * drm_mode->vrefresh; + + drm_mode->type = 0x48; + drm_mode_set_name(drm_mode); + + if (test_info->test_rr_d == 0) + drm_mode->clock /= 1000; + else + drm_mode->clock /= 1001; + + if (test_info->test_h_width == 640) + drm_mode->clock = 25170; +} + +static int dp_panel_update_modes(struct drm_connector *connector, + struct edid *edid) +{ + int rc = 0; + + if (edid) { + rc = drm_connector_update_edid_property(connector, edid); + if (rc) { + DRM_ERROR("failed to update edid property %d\n", rc); + return rc; + } + rc = drm_add_edid_modes(connector, edid); + DRM_DEBUG_DP("%s -", __func__); + return rc; + } + + rc = drm_connector_update_edid_property(connector, NULL); + if (rc) + DRM_ERROR("failed to update edid property %d\n", rc); + + return rc; +} + +int dp_panel_read_sink_caps(struct dp_panel *dp_panel, + struct drm_connector *connector) +{ + int rc = 0, bw_code; + struct dp_panel_private *panel; + + if (!dp_panel || !connector) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + + rc = dp_panel_read_dpcd(dp_panel); + bw_code = drm_dp_link_rate_to_bw_code(dp_panel->link_info.rate); + if (rc || !is_link_rate_valid(bw_code) || + !is_lane_count_valid(dp_panel->link_info.num_lanes) || + (bw_code > dp_panel->max_bw_code)) { + DRM_ERROR("read dpcd failed %d\n", rc); + return rc; + } + rc = drm_dp_read_desc(panel->aux->drm_aux, &dp_panel->desc, + drm_dp_is_branch(dp_panel->dpcd)); + if (rc) { + DRM_ERROR("read sink/branch descriptor failed %d\n", rc); + return rc; + } + + + kfree(dp_panel->edid); + dp_panel->edid = drm_get_edid(connector, + &panel->aux->drm_aux->ddc); + if (!dp_panel->edid) { + DRM_ERROR("panel edid read failed\n"); + return -EINVAL; + } + + if (panel->aux_cfg_update_done) { + DRM_DEBUG_DP("read DPCD with updated AUX config\n"); + rc = dp_panel_read_dpcd(dp_panel); + bw_code = drm_dp_link_rate_to_bw_code(dp_panel->link_info.rate); + if (rc || !is_link_rate_valid(bw_code) || + !is_lane_count_valid(dp_panel->link_info.num_lanes) + || (bw_code > dp_panel->max_bw_code)) { + DRM_ERROR("read dpcd failed %d\n", rc); + return rc; + } + panel->aux_cfg_update_done = false; + } + + return 0; +} + +u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, + u32 mode_edid_bpp, u32 mode_pclk_khz) +{ + struct dp_panel_private *panel; + u32 bpp = mode_edid_bpp; + + if (!dp_panel || !mode_edid_bpp || !mode_pclk_khz) { + DRM_ERROR("invalid input\n"); + return 0; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + + if (dp_panel->video_test) + bpp = dp_link_bit_depth_to_bpp( + panel->link->test_video.test_bit_depth); + else + bpp = dp_panel_get_supported_bpp(dp_panel, mode_edid_bpp, + mode_pclk_khz); + + return bpp; +} + +int dp_panel_get_modes(struct dp_panel *dp_panel, + struct drm_connector *connector, struct dp_display_mode *mode) +{ + struct dp_panel_private *panel; + + if (!dp_panel) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + + if (dp_panel->video_test) { + dp_panel_set_test_mode(panel, mode); + return 1; + } else if (dp_panel->edid) { + return dp_panel_update_modes(connector, dp_panel->edid); + } + + return 0; +} + +u8 dp_panel_get_edid_checksum(struct edid *edid) +{ + struct edid *last_block; + u8 *raw_edid; + bool is_edid_corrupt; + + if (!edid) { + DRM_ERROR("invalid edid input\n"); + return 0; + } + + raw_edid = (u8 *)edid; + raw_edid += (edid->extensions * EDID_LENGTH); + last_block = (struct edid *)raw_edid; + + /* block type extension */ + drm_edid_block_valid(raw_edid, 1, false, &is_edid_corrupt); + if (!is_edid_corrupt) + return last_block->checksum; + + DRM_ERROR("Invalid block, no checksum\n"); + return 0; +} + +void dp_panel_handle_sink_request(struct dp_panel *dp_panel) +{ + struct dp_panel_private *panel; + + if (!dp_panel) { + DRM_ERROR("invalid input\n"); + return; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + + if (panel->link->sink_request & DP_TEST_LINK_EDID_READ) { + u8 checksum = dp_panel_get_edid_checksum(dp_panel->edid); + + dp_link_send_edid_checksum(panel->link, checksum); + dp_link_send_test_response(panel->link); + } +} + +void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable) +{ + struct dp_catalog *catalog; + struct dp_panel_private *panel; + + if (!dp_panel) { + DRM_ERROR("invalid input\n"); + return; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + catalog = panel->catalog; + + if (!panel->panel_on) { + DRM_DEBUG_DP("DP panel not enabled, handle TPG on next on\n"); + return; + } + + if (!enable) { + dp_catalog_panel_tpg_disable(catalog); + return; + } + + DRM_DEBUG_DP("%s: calling catalog tpg_enable\n", __func__); + dp_catalog_panel_tpg_enable(catalog, &panel->dp_panel.dp_mode.drm_mode); +} + +void dp_panel_dump_regs(struct dp_panel *dp_panel) +{ + struct dp_catalog *catalog; + struct dp_panel_private *panel; + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + catalog = panel->catalog; + + dp_catalog_dump_regs(catalog); +} + +int dp_panel_timing_cfg(struct dp_panel *dp_panel) +{ + int rc = 0; + u32 data, total_ver, total_hor; + struct dp_catalog *catalog; + struct dp_panel_private *panel; + struct drm_display_mode *drm_mode; + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + catalog = panel->catalog; + drm_mode = &panel->dp_panel.dp_mode.drm_mode; + + DRM_DEBUG_DP("width=%d hporch= %d %d %d\n", + drm_mode->hdisplay, drm_mode->htotal - drm_mode->hsync_end, + drm_mode->hsync_start - drm_mode->hdisplay, + drm_mode->hsync_end - drm_mode->hsync_start); + + DRM_DEBUG_DP("height=%d vporch= %d %d %d\n", + drm_mode->vdisplay, drm_mode->vtotal - drm_mode->vsync_end, + drm_mode->vsync_start - drm_mode->vdisplay, + drm_mode->vsync_end - drm_mode->vsync_start); + + total_hor = drm_mode->htotal; + + total_ver = drm_mode->vtotal; + + data = total_ver; + data <<= 16; + data |= total_hor; + + catalog->total = data; + + data = (drm_mode->vtotal - drm_mode->vsync_start); + data <<= 16; + data |= (drm_mode->htotal - drm_mode->hsync_start); + + catalog->sync_start = data; + + data = drm_mode->vsync_end - drm_mode->vsync_start; + data <<= 16; + data |= (panel->dp_panel.dp_mode.v_active_low << 31); + data |= drm_mode->hsync_end - drm_mode->hsync_start; + data |= (panel->dp_panel.dp_mode.h_active_low << 15); + + catalog->width_blanking = data; + + data = drm_mode->vdisplay; + data <<= 16; + data |= drm_mode->hdisplay; + + catalog->dp_active = data; + + dp_catalog_panel_timing_cfg(catalog); + panel->panel_on = true; + + return rc; +} + +int dp_panel_init_panel_info(struct dp_panel *dp_panel) +{ + int rc = 0; + struct drm_display_mode *drm_mode; + + drm_mode = &dp_panel->dp_mode.drm_mode; + + /* + * print resolution info as this is a result + * of user initiated action of cable connection + */ + DRM_DEBUG_DP("SET NEW RESOLUTION:\n"); + DRM_DEBUG_DP("%dx%d@%dfps\n", drm_mode->hdisplay, + drm_mode->vdisplay, drm_mode->vrefresh); + DRM_DEBUG_DP("h_porches(back|front|width) = (%d|%d|%d)\n", + drm_mode->htotal - drm_mode->hsync_end, + drm_mode->hsync_start - drm_mode->hdisplay, + drm_mode->hsync_end - drm_mode->hsync_start); + DRM_DEBUG_DP("v_porches(back|front|width) = (%d|%d|%d)\n", + drm_mode->vtotal - drm_mode->vsync_end, + drm_mode->vsync_start - drm_mode->vdisplay, + drm_mode->vsync_end - drm_mode->vsync_start); + DRM_DEBUG_DP("pixel clock (KHz)=(%d)\n", drm_mode->clock); + DRM_DEBUG_DP("bpp = %d\n", dp_panel->dp_mode.bpp); + + dp_panel->dp_mode.bpp = max_t(u32, 18, + min_t(u32, dp_panel->dp_mode.bpp, 30)); + DRM_DEBUG_DP("updated bpp = %d\n", dp_panel->dp_mode.bpp); + + return rc; +} + +struct dp_panel *dp_panel_get(struct dp_panel_in *in) +{ + struct dp_panel_private *panel; + struct dp_panel *dp_panel; + + if (!in->dev || !in->catalog || !in->aux || !in->link) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + panel = devm_kzalloc(in->dev, sizeof(*panel), GFP_KERNEL); + if (!panel) + return ERR_PTR(-ENOMEM); + + panel->dev = in->dev; + panel->aux = in->aux; + panel->catalog = in->catalog; + panel->link = in->link; + + dp_panel = &panel->dp_panel; + dp_panel->max_bw_code = DP_LINK_BW_8_1; + panel->aux_cfg_update_done = false; + + return dp_panel; +} + +void dp_panel_put(struct dp_panel *dp_panel) +{ + struct dp_panel_private *panel; + + if (!dp_panel) + return; + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + + kfree(dp_panel->edid); +} diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h new file mode 100644 index 0000000..85e61a8 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_PANEL_H_ +#define _DP_PANEL_H_ + +#include <drm/msm_drm.h> + +#include "dp_aux.h" +#include "dp_link.h" +#include "dp_hpd.h" + +struct edid; + +#define DP_MAX_DOWNSTREAM_PORTS 0x10 +#define DPRX_EXTENDED_DPCD_FIELD 0x2200 + +struct dp_display_mode { + struct drm_display_mode drm_mode; + u32 capabilities; + u32 bpp; + u32 h_active_low; + u32 v_active_low; +}; + +struct dp_panel_in { + struct device *dev; + struct dp_aux *aux; + struct dp_link *link; + struct dp_catalog *catalog; +}; + +struct dp_panel { + /* dpcd raw data */ + u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; + + struct dp_link_info link_info; + struct drm_dp_desc desc; + struct edid *edid; + struct drm_connector *connector; + struct dp_display_mode dp_mode; + bool video_test; + + u32 vic; + u32 max_pclk_khz; + u32 max_dp_lanes; + + u32 max_bw_code; +}; + +int dp_panel_init_panel_info(struct dp_panel *dp_panel); +int dp_panel_deinit(struct dp_panel *dp_panel); +int dp_panel_timing_cfg(struct dp_panel *dp_panel); +void dp_panel_dump_regs(struct dp_panel *dp_panel); +int dp_panel_read_sink_caps(struct dp_panel *dp_panel, + struct drm_connector *connector); +u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp, + u32 mode_pclk_khz); +int dp_panel_get_modes(struct dp_panel *dp_panel, + struct drm_connector *connector, struct dp_display_mode *mode); +void dp_panel_handle_sink_request(struct dp_panel *dp_panel); +void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable); + +/** + * is_link_rate_valid() - validates the link rate + * @lane_rate: link rate requested by the sink + * + * Returns true if the requested link rate is supported. + */ +static inline bool is_link_rate_valid(u32 bw_code) +{ + return (bw_code == DP_LINK_BW_1_62 || + bw_code == DP_LINK_BW_2_7 || + bw_code == DP_LINK_BW_5_4 || + bw_code == DP_LINK_BW_8_1); +} + +/** + * dp_link_is_lane_count_valid() - validates the lane count + * @lane_count: lane count requested by the sink + * + * Returns true if the requested lane count is supported. + */ +static inline bool is_lane_count_valid(u32 lane_count) +{ + return (lane_count == 1 || + lane_count == 2 || + lane_count == 4); +} + +struct dp_panel *dp_panel_get(struct dp_panel_in *in); +void dp_panel_put(struct dp_panel *dp_panel); +#endif /* _DP_PANEL_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c new file mode 100644 index 0000000..585b248 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -0,0 +1,480 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#include <linux/of_gpio.h> + +#include "dp_parser.h" + +static const struct dp_regulator_cfg sdm845_dp_reg_cfg = { + .num = 2, + .regs = { + {"vdda-1p2", 21800, 4 }, /* 1.2 V */ + {"vdda-0p9", 36000, 32 }, /* 0.9 V */ + }, +}; + +static int msm_dss_ioremap_byname(struct platform_device *pdev, + struct dss_io_data *io_data, const char *name) +{ + struct resource *res = NULL; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + if (!res) { + DRM_ERROR("%pS->%s: '%s' msm_dss_get_res_byname failed\n", + __builtin_return_address(0), __func__, name); + return -ENODEV; + } + + io_data->len = (u32)resource_size(res); + io_data->base = ioremap(res->start, io_data->len); + if (!io_data->base) { + DRM_ERROR("%pS->%s: '%s' ioremap failed\n", + __builtin_return_address(0), __func__, name); + return -EIO; + } + + return 0; +} + +static void msm_dss_iounmap(struct dss_io_data *io_data) +{ + if (io_data->base) { + iounmap(io_data->base); + io_data->base = NULL; + } + io_data->len = 0; +} + +static void dp_parser_unmap_io_resources(struct dp_parser *parser) +{ + struct dp_io *io = &parser->io; + + msm_dss_iounmap(&io->dp_ahb); + msm_dss_iounmap(&io->dp_aux); + msm_dss_iounmap(&io->dp_link); + msm_dss_iounmap(&io->dp_p0); + msm_dss_iounmap(&io->phy_io); + msm_dss_iounmap(&io->ln_tx0_io); + msm_dss_iounmap(&io->ln_tx0_io); + msm_dss_iounmap(&io->dp_pll_io); + msm_dss_iounmap(&io->dp_cc_io); + msm_dss_iounmap(&io->usb3_dp_com); + msm_dss_iounmap(&io->qfprom_io); +} + +static int dp_parser_ctrl_res(struct dp_parser *parser) +{ + int rc = 0; + u32 index; + struct platform_device *pdev = parser->pdev; + struct device_node *of_node = parser->pdev->dev.of_node; + struct dp_io *io = &parser->io; + + rc = of_property_read_u32(of_node, "cell-index", &index); + if (rc) { + DRM_ERROR("cell-index not specified, rc=%d\n", rc); + return rc; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_ahb, "dp_ahb"); + if (rc) { + DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_aux, "dp_aux"); + if (rc) { + DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_link, "dp_link"); + if (rc) { + DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_p0, "dp_p0"); + if (rc) { + DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->phy_io, "dp_phy"); + if (rc) { + DRM_ERROR("unable to remap dp PHY resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->ln_tx0_io, "dp_ln_tx0"); + if (rc) { + DRM_ERROR("unable to remap dp TX0 resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->ln_tx1_io, "dp_ln_tx1"); + if (rc) { + DRM_ERROR("unable to remap dp TX1 resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_pll_io, "dp_pll"); + if (rc) { + DRM_ERROR("unable to remap DP PLL resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->usb3_dp_com, "usb3_dp_com"); + if (rc) { + DRM_ERROR("unable to remap USB3 DP com resources, rc=%d\n", rc); + goto err; + } + + rc = msm_dss_ioremap_byname(pdev, &io->dp_cc_io, "dp_mmss_cc"); + if (rc) { + DRM_ERROR("unable to remap dp MMSS_CC resources\n"); + goto err; + } + + if (msm_dss_ioremap_byname(pdev, &io->qfprom_io, "qfprom_physical")) + pr_warn("unable to remap dp qfprom resources\n"); + + return 0; +err: + dp_parser_unmap_io_resources(parser); + return rc; +} + +static const char *dp_get_phy_aux_config_property(u32 cfg_type) +{ + switch (cfg_type) { + case PHY_AUX_CFG0: + return "qcom,aux-cfg0-settings"; + case PHY_AUX_CFG1: + return "qcom,aux-cfg1-settings"; + case PHY_AUX_CFG2: + return "qcom,aux-cfg2-settings"; + case PHY_AUX_CFG3: + return "qcom,aux-cfg3-settings"; + case PHY_AUX_CFG4: + return "qcom,aux-cfg4-settings"; + case PHY_AUX_CFG5: + return "qcom,aux-cfg5-settings"; + case PHY_AUX_CFG6: + return "qcom,aux-cfg6-settings"; + case PHY_AUX_CFG7: + return "qcom,aux-cfg7-settings"; + case PHY_AUX_CFG8: + return "qcom,aux-cfg8-settings"; + case PHY_AUX_CFG9: + return "qcom,aux-cfg9-settings"; + default: + return "unknown"; + } +} + +static int dp_parser_aux(struct dp_parser *parser) +{ + struct device_node *of_node = parser->pdev->dev.of_node; + int len = 0, i = 0, j = 0, config_count = 0; + const char *data; + + for (i = 0; i < PHY_AUX_CFG_MAX; i++) { + const char *property = dp_get_phy_aux_config_property(i); + + data = of_get_property(of_node, property, &len); + if (!data) { + DRM_ERROR("Unable to read %s\n", property); + goto error; + } + + config_count = len - 1; + if (config_count < 1 || /* minimum config count = 1 */ + config_count > DP_AUX_CFG_MAX_VALUE_CNT) { + DRM_ERROR("Invalid config count (%d) configs for %s\n", + config_count, property); + goto error; + } + + parser->aux_cfg[i].offset = data[0]; + parser->aux_cfg[i].cfg_cnt = config_count; + DRM_DEBUG_DP("%s offset=0x%x, cfg_cnt=%d\n", + property, + parser->aux_cfg[i].offset, + parser->aux_cfg[i].cfg_cnt); + for (j = 1; j < len; j++) { + parser->aux_cfg[i].lut[j - 1] = data[j]; + DRM_DEBUG_DP("%s lut[%d]=0x%x\n", + property, + i, + parser->aux_cfg[i].lut[j - 1]); + } + } + return 0; + +error: + memset(parser->aux_cfg, 0, sizeof(parser->aux_cfg)); + + return -EINVAL; +} + +static int dp_parser_misc(struct dp_parser *parser) +{ + u32 rc; + struct device_node *of_node = parser->pdev->dev.of_node; + + parser->max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ; + rc = of_property_read_u32(of_node, + "qcom,max-pclk-frequency-khz", &parser->max_pclk_khz); + + parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; + rc = of_property_read_u32(of_node, + "qcom,max-lanes-for-dp", &parser->max_dp_lanes); + + return 0; +} + +static int dp_parser_pinctrl(struct dp_parser *parser) +{ + struct dp_pinctrl *pinctrl = &parser->pinctrl; + + pinctrl->pin = devm_pinctrl_get(&parser->pdev->dev); + + if (IS_ERR(pinctrl->pin)) { + DRM_ERROR("failed to get pinctrl, rc=%ld\n", + PTR_ERR(pinctrl->pin)); + return -EINVAL; + } + + pinctrl->state_active = pinctrl_lookup_state(pinctrl->pin, + "mdss_dp_active"); + if (IS_ERR(pinctrl->state_active)) { + DRM_ERROR("failed to get pinctrl active state, %d\n", + PTR_ERR(pinctrl->state_active)); + return -EINVAL; + } + + pinctrl->state_suspend = pinctrl_lookup_state(pinctrl->pin, + "mdss_dp_sleep"); + if (IS_ERR(pinctrl->state_suspend)) { + DRM_ERROR("failed to get pinctrl suspend state, %d\n", + PTR_ERR(pinctrl->state_suspend)); + return -EINVAL; + } + + return 0; +} + +static int dp_parser_gpio(struct dp_parser *parser) +{ + struct device *dev = &parser->pdev->dev; + struct device_node *of_node = dev->of_node; + + parser->usbplug_cc_gpio = of_get_named_gpio(of_node, + "qcom,usbplug-cc-gpio", 0); + if (!gpio_is_valid(parser->usbplug_cc_gpio)) { + DRM_ERROR("usbplug-cc-gpio not specified\n"); + return -EINVAL; + } + + parser->aux_en_gpio = of_get_named_gpio(of_node, + "qcom,aux-en-gpio", 0); + if (!gpio_is_valid(parser->aux_en_gpio)) { + DRM_ERROR("aux-en-gpio not specified\n"); + return -EINVAL; + } + + parser->aux_sel_gpio = of_get_named_gpio(of_node, + "qcom,aux-sel-gpio", 0); + if (!gpio_is_valid(parser->aux_sel_gpio)) { + DRM_ERROR("aux-sel-gpio not specified\n"); + return -EINVAL; + } + + return 0; +} + +static inline bool dp_parser_check_prefix(const char *clk_prefix, + const char *clk_name) +{ + return !strncmp(clk_prefix, clk_name, strlen(clk_prefix)); +} + +static int dp_parser_init_clk_data(struct dp_parser *parser) +{ + int num_clk = 0, i = 0, rc = 0; + int core_clk_count = 0, ctrl_clk_count = 0; + const char *clk_name; + struct device *dev = &parser->pdev->dev; + struct dss_module_power *core_power = &parser->mp[DP_CORE_PM]; + struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM]; + + num_clk = of_property_count_strings(dev->of_node, "clock-names"); + if (num_clk <= 0) { + DRM_ERROR("no clocks are defined\n"); + return -EINVAL; + } + + for (i = 0; i < num_clk; i++) { + rc = of_property_read_string_index(dev->of_node, + "clock-names", i, &clk_name); + + if (dp_parser_check_prefix("core", clk_name)) + core_clk_count++; + + if (dp_parser_check_prefix("ctrl", clk_name)) + ctrl_clk_count++; + } + + /* Initialize the CORE power module */ + if (core_clk_count == 0) { + DRM_ERROR("no core clocks are defined\n"); + return -EINVAL; + } + + core_power->num_clk = core_clk_count; + core_power->clk_config = devm_kzalloc(dev, + sizeof(struct dss_clk) * core_power->num_clk, + GFP_KERNEL); + if (!core_power->clk_config) + return -EINVAL; + + /* Initialize the CTRL power module */ + if (ctrl_clk_count == 0) { + DRM_ERROR("no ctrl clocks are defined\n"); + return -EINVAL; + } + + ctrl_power->num_clk = ctrl_clk_count; + ctrl_power->clk_config = devm_kzalloc(dev, + sizeof(struct dss_clk) * ctrl_power->num_clk, + GFP_KERNEL); + if (!ctrl_power->clk_config) { + ctrl_power->num_clk = 0; + return -EINVAL; + } + + return 0; +} + +static int dp_parser_clock(struct dp_parser *parser) +{ + int rc = 0, i = 0; + int num_clk = 0; + int core_clk_index = 0, ctrl_clk_index = 0; + int core_clk_count = 0, ctrl_clk_count = 0; + const char *clk_name; + struct device *dev = &parser->pdev->dev; + struct dss_module_power *core_power = &parser->mp[DP_CORE_PM]; + struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM]; + + core_power = &parser->mp[DP_CORE_PM]; + ctrl_power = &parser->mp[DP_CTRL_PM]; + + rc = dp_parser_init_clk_data(parser); + if (rc) { + DRM_ERROR("failed to initialize power data %d\n", rc); + return -EINVAL; + } + + core_clk_count = core_power->num_clk; + ctrl_clk_count = ctrl_power->num_clk; + + num_clk = core_clk_count + ctrl_clk_count; + + for (i = 0; i < num_clk; i++) { + rc = of_property_read_string_index(dev->of_node, "clock-names", + i, &clk_name); + if (rc) { + DRM_ERROR("error reading clock-names %d\n", rc); + return rc; + } + if (dp_parser_check_prefix("core", clk_name) && + core_clk_index < core_clk_count) { + struct dss_clk *clk = + &core_power->clk_config[core_clk_index]; + strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name)); + clk->type = DSS_CLK_AHB; + core_clk_index++; + } else if (dp_parser_check_prefix("ctrl", clk_name) && + ctrl_clk_index < ctrl_clk_count) { + struct dss_clk *clk = + &ctrl_power->clk_config[ctrl_clk_index]; + strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name)); + ctrl_clk_index++; + + if (!strncmp(clk_name, "ctrl_link_clk", + strlen("ctrl_link_clk")) || + !strncmp(clk_name, "ctrl_pixel_clk", + strlen("ctrl_pixel_clk"))) + clk->type = DSS_CLK_PCLK; + else + clk->type = DSS_CLK_AHB; + } + } + + DRM_DEBUG_DP("clock parsing successful\n"); + + return 0; +} + +static int dp_parser_parse(struct dp_parser *parser) +{ + int rc = 0; + + if (!parser) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + /* Default: We assume that USB and DP share PHY(Combo phy) */ + parser->combo_phy_en = true; + + rc = dp_parser_ctrl_res(parser); + if (rc) + return rc; + + rc = dp_parser_aux(parser); + if (rc) + return rc; + + rc = dp_parser_misc(parser); + if (rc) + return rc; + + rc = dp_parser_clock(parser); + if (rc) + return rc; + + /* Map the corresponding regulator information according to + * version. Currently, since we only have one supported platform, + * mapping the regulator directly. + */ + parser->regulator_cfg = &sdm845_dp_reg_cfg; + + rc = dp_parser_gpio(parser); + if (rc) { + DRM_ERROR("Parsing GPIOs failed.Assuming ComboPhy disabled\n"); + parser->combo_phy_en = false; + return 0; + } + + rc = dp_parser_pinctrl(parser); + return rc; +} + +struct dp_parser *dp_parser_get(struct platform_device *pdev) +{ + struct dp_parser *parser; + + parser = devm_kzalloc(&pdev->dev, sizeof(*parser), GFP_KERNEL); + if (!parser) + return ERR_PTR(-ENOMEM); + + parser->parse = dp_parser_parse; + parser->pdev = pdev; + + return parser; +} diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h new file mode 100644 index 0000000..1dde473 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -0,0 +1,218 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_PARSER_H_ +#define _DP_PARSER_H_ + +#define DP_LABEL "MDSS DP DISPLAY" +#define AUX_CFG_LEN 10 +#define DP_MAX_PIXEL_CLK_KHZ 675000 +#define DP_MAX_NUM_DP_LANES 4 + +enum dp_pm_type { + DP_CORE_PM, + DP_CTRL_PM, + DP_PHY_PM, + DP_MAX_PM +}; + +struct dss_io_data { + u32 len; + void __iomem *base; +}; + +static inline const char *dp_parser_pm_name(enum dp_pm_type module) +{ + switch (module) { + case DP_CORE_PM: return "DP_CORE_PM"; + case DP_CTRL_PM: return "DP_CTRL_PM"; + case DP_PHY_PM: return "DP_PHY_PM"; + default: return "???"; + } +} + +/** + * struct dp_display_data - display related device tree data. + * + * @ctrl_node: referece to controller device + * @phy_node: reference to phy device + * @is_active: is the controller currently active + * @name: name of the display + * @display_type: type of the display + */ +struct dp_display_data { + struct device_node *ctrl_node; + struct device_node *phy_node; + bool is_active; + const char *name; + const char *display_type; +}; + +/** + * struct dp_ctrl_resource - controller's IO related data + * + * @dp_ahb: controller's ahb mapped memory address + * @dp_aux: controller's aux mapped memory address + * @dp_link: controller's link mapped memory address + * @dp_p0: controller's p0 mapped memory address + * @phy_io: phy's mapped memory address + * @ln_tx0_io: USB-DP lane TX0's mapped memory address + * @ln_tx1_io: USB-DP lane TX1's mapped memory address + * @dp_cc_io: DP cc's mapped memory address + * @qfprom_io: qfprom's mapped memory address + * @dp_pll_io: DP PLL mapped memory address + * @usb3_dp_com: USB3 DP PHY combo mapped memory address + */ +struct dp_io { + struct dss_io_data ctrl_io; + struct dss_io_data dp_ahb; + struct dss_io_data dp_aux; + struct dss_io_data dp_link; + struct dss_io_data dp_p0; + struct dss_io_data phy_io; + struct dss_io_data ln_tx0_io; + struct dss_io_data ln_tx1_io; + struct dss_io_data dp_cc_io; + struct dss_io_data qfprom_io; + struct dss_io_data dp_pll_io; + struct dss_io_data usb3_dp_com; +}; + +/** + * struct dp_pinctrl - DP's pin control + * + * @pin: pin-controller's instance + * @state_active: active state pin control + * @state_hpd_active: hpd active state pin control + * @state_suspend: suspend state pin control + */ +struct dp_pinctrl { + struct pinctrl *pin; + struct pinctrl_state *state_active; + struct pinctrl_state *state_hpd_active; + struct pinctrl_state *state_suspend; +}; + +#define DP_ENUM_STR(x) #x +#define DP_AUX_CFG_MAX_VALUE_CNT 3 +/** + * struct dp_aux_cfg - DP's AUX configuration settings + * + * @cfg_cnt: count of the configurable settings for the AUX register + * @current_index: current index of the AUX config lut + * @offset: register offset of the AUX config register + * @lut: look up table for the AUX config values for this register + */ +struct dp_aux_cfg { + u32 cfg_cnt; + u32 current_index; + u32 offset; + u32 lut[DP_AUX_CFG_MAX_VALUE_CNT]; +}; + +/* PHY AUX config registers */ +enum dp_phy_aux_config_type { + PHY_AUX_CFG0, + PHY_AUX_CFG1, + PHY_AUX_CFG2, + PHY_AUX_CFG3, + PHY_AUX_CFG4, + PHY_AUX_CFG5, + PHY_AUX_CFG6, + PHY_AUX_CFG7, + PHY_AUX_CFG8, + PHY_AUX_CFG9, + PHY_AUX_CFG_MAX, +}; + +#define DP_DEV_REGULATOR_MAX 4 + +/* Regulators for DP devices */ +struct dp_reg_entry { + char name[32]; + int enable_load; + int disable_load; +}; + +struct dp_regulator_cfg { + int num; + struct dp_reg_entry regs[DP_DEV_REGULATOR_MAX]; +}; + + +static inline char *dp_phy_aux_config_type_to_string(u32 cfg_type) +{ + switch (cfg_type) { + case PHY_AUX_CFG0: + return DP_ENUM_STR(PHY_AUX_CFG0); + case PHY_AUX_CFG1: + return DP_ENUM_STR(PHY_AUX_CFG1); + case PHY_AUX_CFG2: + return DP_ENUM_STR(PHY_AUX_CFG2); + case PHY_AUX_CFG3: + return DP_ENUM_STR(PHY_AUX_CFG3); + case PHY_AUX_CFG4: + return DP_ENUM_STR(PHY_AUX_CFG4); + case PHY_AUX_CFG5: + return DP_ENUM_STR(PHY_AUX_CFG5); + case PHY_AUX_CFG6: + return DP_ENUM_STR(PHY_AUX_CFG6); + case PHY_AUX_CFG7: + return DP_ENUM_STR(PHY_AUX_CFG7); + case PHY_AUX_CFG8: + return DP_ENUM_STR(PHY_AUX_CFG8); + case PHY_AUX_CFG9: + return DP_ENUM_STR(PHY_AUX_CFG9); + default: + return "unknown"; + } +} + +/** + * struct dp_parser - DP parser's data exposed to clients + * + * @pdev: platform data of the client + * @mp: gpio, regulator and clock related data + * @pinctrl: pin-control related data + * @aux_en_gpio: GPIO to control AUX data when using combo PHY + * @aux_sel_gpio: GPIO to control plug orientation when using combo PHY + * @usbplug_cc_gpio: GPIO to route DP/USB lanes when using combo PHY + * @combo_phy_en: Boolean to check whether combo PHY is used + * @disp_data: controller's display related data + * @parse: function to be called by client to parse device tree. + */ +struct dp_parser { + struct platform_device *pdev; + struct dss_module_power mp[DP_MAX_PM]; + struct dp_pinctrl pinctrl; + unsigned int aux_en_gpio; + unsigned int aux_sel_gpio; + unsigned int usbplug_cc_gpio; + bool combo_phy_en; + struct dp_io io; + struct dp_display_data disp_data; + const struct dp_regulator_cfg *regulator_cfg; + u8 l_map[4]; + struct dp_aux_cfg aux_cfg[AUX_CFG_LEN]; + u32 max_pclk_khz; + u32 max_dp_lanes; + + int (*parse)(struct dp_parser *parser); +}; + +/** + * dp_parser_get() - get the DP's device tree parser module + * + * @pdev: platform data of the client + * return: pointer to dp_parser structure. + * + * This function provides client capability to parse the + * device tree and populate the data structures. The data + * related to clock, regulators, pin-control and other + * can be parsed using this module. + */ +struct dp_parser *dp_parser_get(struct platform_device *pdev); + +#endif diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c new file mode 100644 index 0000000..26f84b3 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_power.c @@ -0,0 +1,545 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/clk.h> +#include <linux/regulator/consumer.h> +#include <linux/of_gpio.h> +#include "dp_power.h" + +struct dp_power_private { + struct dp_parser *parser; + struct platform_device *pdev; + struct clk *pixel_clk_rcg; + struct clk *link_clk_src; + struct clk *pixel_provider; + struct clk *link_provider; + struct regulator_bulk_data supplies[DP_DEV_REGULATOR_MAX]; + + struct dp_power dp_power; +}; + +static void dp_power_regulator_disable(struct dp_power_private *power) +{ + struct regulator_bulk_data *s = power->supplies; + const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs; + int num = power->parser->regulator_cfg->num; + int i; + + DBG(""); + for (i = num - 1; i >= 0; i--) + if (regs[i].disable_load >= 0) + regulator_set_load(s[i].consumer, + regs[i].disable_load); + + regulator_bulk_disable(num, s); +} + +static int dp_power_regulator_enable(struct dp_power_private *power) +{ + struct regulator_bulk_data *s = power->supplies; + const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs; + int num = power->parser->regulator_cfg->num; + int ret, i; + + DBG(""); + for (i = 0; i < num; i++) { + if (regs[i].enable_load >= 0) { + ret = regulator_set_load(s[i].consumer, + regs[i].enable_load); + if (ret < 0) { + pr_err("regulator %d set op mode failed, %d\n", + i, ret); + goto fail; + } + } + } + + ret = regulator_bulk_enable(num, s); + if (ret < 0) { + pr_err("regulator enable failed, %d\n", ret); + goto fail; + } + + return 0; + +fail: + for (i--; i >= 0; i--) + regulator_set_load(s[i].consumer, regs[i].disable_load); + return ret; +} + +static int dp_power_regulator_init(struct dp_power_private *power) +{ + struct regulator_bulk_data *s = power->supplies; + const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs; + struct platform_device *pdev = power->pdev; + int num = power->parser->regulator_cfg->num; + int i, ret; + + for (i = 0; i < num; i++) + s[i].supply = regs[i].name; + + ret = devm_regulator_bulk_get(&pdev->dev, num, s); + if (ret < 0) { + pr_err("%s: failed to init regulator, ret=%d\n", + __func__, ret); + return ret; + } + + return 0; +} + +static int dp_power_pinctrl_set(struct dp_power_private *power, bool active) +{ + int rc = -EFAULT; + struct pinctrl_state *pin_state; + struct dp_parser *parser = power->parser; + + if (!parser->combo_phy_en) + return 0; + + pin_state = active ? parser->pinctrl.state_active + : parser->pinctrl.state_suspend; + + rc = pinctrl_select_state(parser->pinctrl.pin, pin_state); + if (rc) { + DRM_ERROR("can not set %s pins\n", + active ? "dp_active" : "dp_sleep"); + return rc; + } + + return 0; +} + +static int dp_power_clk_init(struct dp_power_private *power) +{ + int rc = 0; + struct dss_module_power *core, *ctrl; + struct device *dev = &power->pdev->dev; + + core = &power->parser->mp[DP_CORE_PM]; + ctrl = &power->parser->mp[DP_CTRL_PM]; + + if (power->parser->pll && power->parser->pll->get_provider) { + rc = power->parser->pll->get_provider(power->parser->pll, + &power->link_provider, &power->pixel_provider); + if (rc) { + DRM_ERROR("%s:provider failed,don't set parent\n", + __func__); + return 0; + } + } + + rc = msm_dss_get_clk(dev, core->clk_config, core->num_clk); + if (rc) { + DRM_ERROR("failed to get %s clk. err=%d\n", + dp_parser_pm_name(DP_CORE_PM), rc); + return rc; + } + + rc = msm_dss_get_clk(dev, ctrl->clk_config, ctrl->num_clk); + if (rc) { + DRM_ERROR("failed to get %s clk. err=%d\n", + dp_parser_pm_name(DP_CTRL_PM), rc); + msm_dss_put_clk(core->clk_config, core->num_clk); + return -ENODEV; + } + + power->pixel_clk_rcg = devm_clk_get(dev, "pixel_clk_rcg"); + if (IS_ERR(power->pixel_clk_rcg)) { + DRM_DEBUG_DP("Unable to get DP pixel clk RCG\n"); + power->pixel_clk_rcg = NULL; + msm_dss_put_clk(core->clk_config, core->num_clk); + return -ENODEV; + } + + return 0; +} + +static int dp_power_clk_deinit(struct dp_power_private *power) +{ + struct dss_module_power *core, *ctrl; + + core = &power->parser->mp[DP_CORE_PM]; + ctrl = &power->parser->mp[DP_CTRL_PM]; + + if (!core || !ctrl) { + return -EINVAL; + } + + msm_dss_put_clk(ctrl->clk_config, ctrl->num_clk); + msm_dss_put_clk(core->clk_config, core->num_clk); + return 0; +} + +static int dp_power_clk_set_rate(struct dp_power_private *power, + enum dp_pm_type module, bool enable) +{ + int rc = 0; + struct dss_module_power *mp = &power->parser->mp[module]; + + if (enable) { + rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk); + if (rc) { + DRM_ERROR("failed to set clks rate.\n"); + return rc; + } + } + + rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable); + if (rc) { + DRM_ERROR("failed to %d clks, err: %d\n", enable, rc); + return rc; + } + + return 0; +} + +int dp_power_clk_enable(struct dp_power *dp_power, + enum dp_pm_type pm_type, bool enable) +{ + int rc = 0; + struct dss_module_power *mp; + struct dp_power_private *power; + + power = container_of(dp_power, struct dp_power_private, dp_power); + mp = &power->parser->mp[pm_type]; + + if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM) { + DRM_ERROR("unsupported power module: %s\n", + dp_parser_pm_name(pm_type)); + return -EINVAL; + } + + if (enable) { + if (pm_type == DP_CORE_PM && dp_power->core_clks_on) { + DRM_DEBUG_DP("core clks already enabled\n"); + return 0; + } + + if (pm_type == DP_CTRL_PM && dp_power->link_clks_on) { + DRM_DEBUG_DP("links clks already enabled\n"); + return 0; + } + + if ((pm_type == DP_CTRL_PM) && (!dp_power->core_clks_on)) { + DRM_DEBUG_DP("Enable core clks before link clks\n"); + + rc = dp_power_clk_set_rate(power, DP_CORE_PM, enable); + if (rc) { + DRM_ERROR("fail to enable clks: %s. err=%d\n", + dp_parser_pm_name(DP_CORE_PM), rc); + return rc; + } + dp_power->core_clks_on = true; + } + } + + rc = dp_power_clk_set_rate(power, pm_type, enable); + if (rc) { + DRM_ERROR("failed to '%s' clks for: %s. err=%d\n", + enable ? "enable" : "disable", + dp_parser_pm_name(pm_type), rc); + return rc; + } + + if (pm_type == DP_CORE_PM) + dp_power->core_clks_on = enable; + else + dp_power->link_clks_on = enable; + + DRM_DEBUG_DP("%s clocks for %s\n", + enable ? "enable" : "disable", + dp_parser_pm_name(pm_type)); + DRM_DEBUG_DP("link_clks:%s core_clks:%s\n", + dp_power->link_clks_on ? "on" : "off", + dp_power->core_clks_on ? "on" : "off"); + + return 0; +} + +static int dp_power_request_gpios(struct dp_power_private *power) +{ + int rc = 0; + struct device *dev = &power->pdev->dev; + struct dp_parser *parser = power->parser; + + if (gpio_is_valid(parser->aux_en_gpio)) { + rc = devm_gpio_request(dev, parser->aux_en_gpio, "aux_enable"); + if (rc) { + DRM_ERROR("request aux_enable gpio failed, rc=%d\n", + rc); + return rc; + } + } + if (gpio_is_valid(parser->aux_sel_gpio)) { + rc = devm_gpio_request(dev, parser->aux_sel_gpio, "aux_sel"); + if (rc) { + DRM_ERROR("request aux_sel gpio failed, rc=%d\n", rc); + return rc; + } + } + if (gpio_is_valid(parser->usbplug_cc_gpio)) { + rc = devm_gpio_request(dev, parser->usbplug_cc_gpio, + "usbplug_cc"); + if (rc) { + DRM_ERROR("request usbplug_cc gpio failed, rc=%d\n", + rc); + return rc; + } + } + return 0; +} + +static void dp_power_set_gpio(struct dp_power_private *power, bool flip) +{ + struct dp_parser *parser = power->parser; + + if (gpio_is_valid(parser->aux_sel_gpio)) + gpio_direction_output(parser->aux_sel_gpio, flip); + + if (gpio_is_valid(parser->aux_en_gpio)) + gpio_direction_output(parser->aux_en_gpio, 0); + + if (gpio_is_valid(parser->usbplug_cc_gpio)) + gpio_set_value(parser->usbplug_cc_gpio, 0); +} + +static int dp_power_config_gpios(struct dp_power_private *power, bool flip) +{ + int rc = 0; + struct dp_parser *parser = power->parser; + + if (!parser->combo_phy_en) + return rc; + + rc = dp_power_request_gpios(power); + if (rc) { + DRM_ERROR("gpio request failed\n"); + return rc; + } + + dp_power_set_gpio(power, flip); + return 0; +} + +static void dp_power_disable_gpios(struct dp_power_private *power) +{ + struct dp_parser *parser = power->parser; + + if (!parser->combo_phy_en) + return; + + gpio_set_value(parser->aux_sel_gpio, 0); + gpio_set_value(parser->aux_en_gpio, 0); + gpio_set_value(parser->usbplug_cc_gpio, 0); + gpio_free(parser->aux_sel_gpio); + gpio_free(parser->aux_en_gpio); + gpio_free(parser->usbplug_cc_gpio); +} + +int dp_power_client_init(struct dp_power *dp_power) +{ + int rc = 0; + struct dp_power_private *power; + + if (!dp_power) { + DRM_ERROR("invalid power data\n"); + return -EINVAL; + } + + power = container_of(dp_power, struct dp_power_private, dp_power); + + pm_runtime_enable(&power->pdev->dev); + + rc = dp_power_regulator_init(power); + if (rc) { + DRM_ERROR("failed to init regulators %d\n", rc); + goto error; + } + + rc = dp_power_clk_init(power); + if (rc) { + DRM_ERROR("failed to init clocks %d\n", rc); + goto error; + } + return 0; + +error: + pm_runtime_disable(&power->pdev->dev); + return rc; +} + +void dp_power_client_deinit(struct dp_power *dp_power) +{ + struct dp_power_private *power; + + if (!dp_power) { + DRM_ERROR("invalid power data\n"); + return; + } + + power = container_of(dp_power, struct dp_power_private, dp_power); + + dp_power_clk_deinit(power); + pm_runtime_disable(&power->pdev->dev); + +} + +int dp_power_set_link_clk_parent(struct dp_power *dp_power) +{ + int rc = 0; + struct dp_power_private *power; + u32 num; + struct dss_clk *cfg; + char *name = "ctrl_link_clk"; + + if (!dp_power) { + DRM_ERROR("invalid power data\n"); + rc = -EINVAL; + goto exit; + } + + power = container_of(dp_power, struct dp_power_private, dp_power); + + num = power->parser->mp[DP_CTRL_PM].num_clk; + cfg = power->parser->mp[DP_CTRL_PM].clk_config; + + while (num && strcmp(cfg->clk_name, name)) { + num--; + cfg++; + } + + if (num && power->link_provider) { + power->link_clk_src = clk_get_parent(cfg->clk); + if (power->link_clk_src) { + clk_set_parent(power->link_clk_src, + power->link_provider); + DRM_DEBUG_DP("%s: is the parent of clk=%s\n", + __clk_get_name(power->link_provider), + __clk_get_name(power->link_clk_src)); + } else { + DRM_ERROR("couldn't get parent for clk=%s\n", + name); + rc = -EINVAL; + } + } else { + DRM_ERROR("%s clock could not be set parent\n", name); + rc = -EINVAL; + } +exit: + return rc; +} + +int dp_power_set_pixel_clk_parent(struct dp_power *dp_power) +{ + int rc = 0; + struct dp_power_private *power; + + power = container_of(dp_power, struct dp_power_private, dp_power); + + if (power->pixel_clk_rcg && power->pixel_provider) { + rc = clk_set_parent(power->pixel_clk_rcg, + power->pixel_provider); + if (rc) { + DRM_ERROR("failed to set parent clk src, %d\n", rc); + return rc; + } + DRM_DEBUG_DP("%s: is the parent of clk=%s\n", + __clk_get_name(power->pixel_provider), + __clk_get_name(power->pixel_clk_rcg)); + } + + return 0; +} + +int dp_power_init(struct dp_power *dp_power, bool flip) +{ + int rc = 0; + struct dp_power_private *power = NULL; + + if (!dp_power) { + DRM_ERROR("invalid power data\n"); + return -EINVAL; + } + + power = container_of(dp_power, struct dp_power_private, dp_power); + + pm_runtime_get_sync(&power->pdev->dev); + rc = dp_power_regulator_enable(power); + if (rc) { + DRM_ERROR("failed to enable regulators, %d\n", rc); + goto exit; + } + + rc = dp_power_pinctrl_set(power, true); + if (rc) { + DRM_ERROR("failed to set pinctrl state, %d\n", rc); + goto err_pinctrl; + } + + rc = dp_power_config_gpios(power, flip); + if (rc) { + DRM_ERROR("failed to enable gpios, %d\n", rc); + goto err_gpio; + } + + rc = dp_power_clk_enable(dp_power, DP_CORE_PM, true); + if (rc) { + DRM_ERROR("failed to enable DP core clocks, %d\n", rc); + goto err_clk; + } + + return 0; + +err_clk: + dp_power_disable_gpios(power); +err_gpio: + dp_power_pinctrl_set(power, false); +err_pinctrl: + dp_power_regulator_disable(power); +exit: + pm_runtime_put_sync(&power->pdev->dev); + return rc; +} + +int dp_power_deinit(struct dp_power *dp_power) +{ + struct dp_power_private *power; + + power = container_of(dp_power, struct dp_power_private, dp_power); + + dp_power_clk_enable(dp_power, DP_CORE_PM, false); + dp_power_disable_gpios(power); + dp_power_pinctrl_set(power, false); + dp_power_regulator_disable(power); + pm_runtime_put_sync(&power->pdev->dev); + return 0; +} + +struct dp_power *dp_power_get(struct dp_parser *parser) +{ + struct dp_power_private *power; + struct dp_power *dp_power; + + if (!parser) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + power = devm_kzalloc(&parser->pdev->dev, sizeof(*power), GFP_KERNEL); + if (!power) { + return ERR_PTR(-ENOMEM); + } + + power->parser = parser; + power->pdev = parser->pdev; + + dp_power = &power->dp_power; + + return dp_power; +} diff --git a/drivers/gpu/drm/msm/dp/dp_power.h b/drivers/gpu/drm/msm/dp/dp_power.h new file mode 100644 index 0000000..9d24f36 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_power.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_POWER_H_ +#define _DP_POWER_H_ + +#include "dp_parser.h" + +/** + * sruct dp_power - DisplayPort's power related data + * + * @init: initializes the regulators/core clocks/GPIOs/pinctrl + * @deinit: turns off the regulators/core clocks/GPIOs/pinctrl + * @clk_enable: enable/disable the DP clocks + * @set_link_clk_parent: set the parent of DP link clock + * @set_pixel_clk_parent: set the parent of DP pixel clock + */ +struct dp_power { + bool core_clks_on; + bool link_clks_on; +}; + +int dp_power_init(struct dp_power *power, bool flip); +int dp_power_deinit(struct dp_power *power); +int dp_power_clk_enable(struct dp_power *power, enum dp_pm_type pm_type, + bool enable); +int dp_power_set_link_clk_parent(struct dp_power *power); +int dp_power_set_pixel_clk_parent(struct dp_power *power); +int dp_power_client_init(struct dp_power *power); +void dp_power_client_deinit(struct dp_power *power); + +/** + * dp_power_get() - configure and get the DisplayPort power module data + * + * @parser: instance of parser module + * return: pointer to allocated power module data + * + * This API will configure the DisplayPort's power module and provides + * methods to be called by the client to configure the power related + * modueles. + */ +struct dp_power *dp_power_get(struct dp_parser *parser); + +#endif /* _DP_POWER_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h new file mode 100644 index 0000000..28c1682 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -0,0 +1,489 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#ifndef _DP_REG_H_ +#define _DP_REG_H_ + +/* DP_TX Registers */ +#define REG_DP_HW_VERSION (0x00000000) + +#define REG_DP_SW_RESET (0x00000010) +#define DP_SW_RESET (0x00000001) + +#define REG_DP_PHY_CTRL (0x00000014) +#define DP_PHY_CTRL_SW_RESET_PLL (0x00000001) +#define DP_PHY_CTRL_SW_RESET (0x00000004) + +#define REG_DP_CLK_CTRL (0x00000018) +#define REG_DP_CLK_ACTIVE (0x0000001C) +#define REG_DP_INTR_STATUS (0x00000020) +#define REG_DP_INTR_STATUS2 (0x00000024) +#define REG_DP_INTR_STATUS3 (0x00000028) + +#define REG_DP_DP_HPD_CTRL (0x00000000) +#define DP_DP_HPD_CTRL_HPD_EN (0x00000001) + +#define REG_DP_DP_HPD_INT_STATUS (0x00000004) + +#define REG_DP_DP_HPD_INT_ACK (0x00000008) +#define DP_DP_HPD_PLUG_INT_ACK (0x00000001) +#define DP_DP_IRQ_HPD_INT_ACK (0x00000002) +#define DP_DP_HPD_REPLUG_INT_ACK (0x00000004) +#define DP_DP_HPD_UNPLUG_INT_ACK (0x00000008) + +#define REG_DP_DP_HPD_INT_MASK (0x0000000C) +#define DP_DP_HPD_PLUG_INT_MASK (0x00000001) +#define DP_DP_IRQ_HPD_INT_MASK (0x00000002) +#define DP_DP_HPD_REPLUG_INT_MASK (0x00000004) +#define DP_DP_HPD_UNPLUG_INT_MASK (0x00000008) + +#define REG_DP_DP_HPD_REFTIMER (0x00000018) +#define REG_DP_DP_HPD_EVENT_TIME_0 (0x0000001C) +#define REG_DP_DP_HPD_EVENT_TIME_1 (0x00000020) + +#define REG_DP_AUX_CTRL (0x00000030) +#define DP_AUX_CTRL_ENABLE (0x00000001) +#define DP_AUX_CTRL_RESET (0x00000002) + +#define REG_DP_AUX_DATA (0x00000034) +#define DP_AUX_DATA_READ (0x00000001) +#define DP_AUX_DATA_WRITE (0x00000000) +#define DP_AUX_DATA_OFFSET (0x00000008) +#define DP_AUX_DATA_INDEX_OFFSET (0x00000010) +#define DP_AUX_DATA_MASK (0x0000ff00) +#define DP_AUX_DATA_INDEX_WRITE (0x80000000) + +#define REG_DP_AUX_TRANS_CTRL (0x00000038) +#define DP_AUX_TRANS_CTRL_I2C (0x00000100) +#define DP_AUX_TRANS_CTRL_GO (0x00000200) +#define DP_AUX_TRANS_CTRL_NO_SEND_ADDR (0x00000400) +#define DP_AUX_TRANS_CTRL_NO_SEND_STOP (0x00000800) + +#define REG_DP_TIMEOUT_COUNT (0x0000003C) +#define REG_DP_AUX_LIMITS (0x00000040) +#define REG_DP_AUX_STATUS (0x00000044) + +#define DP_DPCD_CP_IRQ (0x201) +#define DP_DPCD_RXSTATUS (0x69493) + +#define DP_INTERRUPT_TRANS_NUM (0x000000A0) + +#define REG_DP_MAINLINK_CTRL (0x00000000) +#define DP_MAINLINK_CTRL_ENABLE (0x00000001) +#define DP_MAINLINK_CTRL_RESET (0x00000002) +#define DP_MAINLINK_FB_BOUNDARY_SEL (0x02000000) + +#define REG_DP_STATE_CTRL (0x00000004) +#define DP_STATE_CTRL_LINK_TRAINING_PATTERN1 (0x00000001) +#define DP_STATE_CTRL_LINK_TRAINING_PATTERN2 (0x00000002) +#define DP_STATE_CTRL_LINK_TRAINING_PATTERN3 (0x00000004) +#define DP_STATE_CTRL_LINK_TRAINING_PATTERN4 (0x00000008) +#define DP_STATE_CTRL_LINK_SYMBOL_ERR_MEASURE (0x00000010) +#define DP_STATE_CTRL_LINK_PRBS7 (0x00000020) +#define DP_STATE_CTRL_LINK_TEST_CUSTOM_PATTERN (0x00000040) +#define DP_STATE_CTRL_SEND_VIDEO (0x00000080) +#define DP_STATE_CTRL_PUSH_IDLE (0x00000100) + +#define REG_DP_CONFIGURATION_CTRL (0x00000008) +#define DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK (0x00000001) +#define DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN (0x00000002) +#define DP_CONFIGURATION_CTRL_P_INTERLACED (0x00000004) +#define DP_CONFIGURATION_CTRL_INTERLACED_BTF (0x00000008) +#define DP_CONFIGURATION_CTRL_NUM_OF_LANES (0x00000010) +#define DP_CONFIGURATION_CTRL_ENHANCED_FRAMING (0x00000040) +#define DP_CONFIGURATION_CTRL_SEND_VSC (0x00000080) +#define DP_CONFIGURATION_CTRL_BPC (0x00000100) +#define DP_CONFIGURATION_CTRL_ASSR (0x00000400) +#define DP_CONFIGURATION_CTRL_RGB_YUV (0x00000800) +#define DP_CONFIGURATION_CTRL_LSCLK_DIV (0x00002000) +#define DP_CONFIGURATION_CTRL_NUM_OF_LANES_SHIFT (0x04) +#define DP_CONFIGURATION_CTRL_BPC_SHIFT (0x08) +#define DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT (0x0D) + +#define REG_DP_SOFTWARE_MVID (0x00000010) +#define REG_DP_SOFTWARE_NVID (0x00000018) +#define REG_DP_TOTAL_HOR_VER (0x0000001C) +#define REG_DP_START_HOR_VER_FROM_SYNC (0x00000020) +#define REG_DP_HSYNC_VSYNC_WIDTH_POLARITY (0x00000024) +#define REG_DP_ACTIVE_HOR_VER (0x00000028) + +#define REG_DP_MISC1_MISC0 (0x0000002C) +#define DP_MISC0_SYNCHRONOUS_CLK (0x00000001) +#define DP_MISC0_COLORIMETRY_CFG_SHIFT (0x00000001) +#define DP_MISC0_TEST_BITS_DEPTH_SHIFT (0x00000005) + +#define REG_DP_VALID_BOUNDARY (0x00000030) +#define REG_DP_VALID_BOUNDARY_2 (0x00000034) + +#define REG_DP_LOGICAL2PHYSICAL_LANE_MAPPING (0x00000038) +#define LANE0_MAPPING_SHIFT (0x00000000) +#define LANE1_MAPPING_SHIFT (0x00000002) +#define LANE2_MAPPING_SHIFT (0x00000004) +#define LANE3_MAPPING_SHIFT (0x00000006) + +#define REG_DP_MAINLINK_READY (0x00000040) +#define DP_MAINLINK_READY_FOR_VIDEO (0x00000001) +#define DP_MAINLINK_READY_LINK_TRAINING_SHIFT (0x00000003) + +#define REG_DP_MAINLINK_LEVELS (0x00000044) +#define DP_MAINLINK_SAFE_TO_EXIT_LEVEL_2 (0x00000002) + + +#define REG_DP_TU (0x0000004C) + +#define REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET (0x00000054) +#define DP_HBR2_ERM_PATTERN (0x00010000) + +#define REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG0 (0x000000C0) +#define REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG1 (0x000000C4) +#define REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG2 (0x000000C8) + +#define MMSS_DP_MISC1_MISC0 (0x0000002C) +#define MMSS_DP_AUDIO_TIMING_GEN (0x00000080) +#define MMSS_DP_AUDIO_TIMING_RBR_32 (0x00000084) +#define MMSS_DP_AUDIO_TIMING_HBR_32 (0x00000088) +#define MMSS_DP_AUDIO_TIMING_RBR_44 (0x0000008C) +#define MMSS_DP_AUDIO_TIMING_HBR_44 (0x00000090) +#define MMSS_DP_AUDIO_TIMING_RBR_48 (0x00000094) +#define MMSS_DP_AUDIO_TIMING_HBR_48 (0x00000098) + +#define MMSS_DP_PSR_CRC_RG (0x00000154) +#define MMSS_DP_PSR_CRC_B (0x00000158) + +#define REG_DP_COMPRESSION_MODE_CTRL (0x00000180) + +#define MMSS_DP_AUDIO_CFG (0x00000200) +#define MMSS_DP_AUDIO_STATUS (0x00000204) +#define MMSS_DP_AUDIO_PKT_CTRL (0x00000208) +#define MMSS_DP_AUDIO_PKT_CTRL2 (0x0000020C) +#define MMSS_DP_AUDIO_ACR_CTRL (0x00000210) +#define MMSS_DP_AUDIO_CTRL_RESET (0x00000214) + +#define MMSS_DP_SDP_CFG (0x00000228) +#define MMSS_DP_SDP_CFG2 (0x0000022C) +#define MMSS_DP_AUDIO_TIMESTAMP_0 (0x00000230) +#define MMSS_DP_AUDIO_TIMESTAMP_1 (0x00000234) + +#define MMSS_DP_AUDIO_STREAM_0 (0x00000240) +#define MMSS_DP_AUDIO_STREAM_1 (0x00000244) + +#define MMSS_DP_EXTENSION_0 (0x00000250) +#define MMSS_DP_EXTENSION_1 (0x00000254) +#define MMSS_DP_EXTENSION_2 (0x00000258) +#define MMSS_DP_EXTENSION_3 (0x0000025C) +#define MMSS_DP_EXTENSION_4 (0x00000260) +#define MMSS_DP_EXTENSION_5 (0x00000264) +#define MMSS_DP_EXTENSION_6 (0x00000268) +#define MMSS_DP_EXTENSION_7 (0x0000026C) +#define MMSS_DP_EXTENSION_8 (0x00000270) +#define MMSS_DP_EXTENSION_9 (0x00000274) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_0 (0x00000278) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_1 (0x0000027C) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_2 (0x00000280) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_3 (0x00000284) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_4 (0x00000288) +#define MMSS_DP_AUDIO_COPYMANAGEMENT_5 (0x0000028C) +#define MMSS_DP_AUDIO_ISRC_0 (0x00000290) +#define MMSS_DP_AUDIO_ISRC_1 (0x00000294) +#define MMSS_DP_AUDIO_ISRC_2 (0x00000298) +#define MMSS_DP_AUDIO_ISRC_3 (0x0000029C) +#define MMSS_DP_AUDIO_ISRC_4 (0x000002A0) +#define MMSS_DP_AUDIO_ISRC_5 (0x000002A4) +#define MMSS_DP_AUDIO_INFOFRAME_0 (0x000002A8) +#define MMSS_DP_AUDIO_INFOFRAME_1 (0x000002AC) +#define MMSS_DP_AUDIO_INFOFRAME_2 (0x000002B0) + +#define MMSS_DP_GENERIC0_0 (0x00000300) +#define MMSS_DP_GENERIC0_1 (0x00000304) +#define MMSS_DP_GENERIC0_2 (0x00000308) +#define MMSS_DP_GENERIC0_3 (0x0000030C) +#define MMSS_DP_GENERIC0_4 (0x00000310) +#define MMSS_DP_GENERIC0_5 (0x00000314) +#define MMSS_DP_GENERIC0_6 (0x00000318) +#define MMSS_DP_GENERIC0_7 (0x0000031C) +#define MMSS_DP_GENERIC0_8 (0x00000320) +#define MMSS_DP_GENERIC0_9 (0x00000324) +#define MMSS_DP_GENERIC1_0 (0x00000328) +#define MMSS_DP_GENERIC1_1 (0x0000032C) +#define MMSS_DP_GENERIC1_2 (0x00000330) +#define MMSS_DP_GENERIC1_3 (0x00000334) +#define MMSS_DP_GENERIC1_4 (0x00000338) +#define MMSS_DP_GENERIC1_5 (0x0000033C) +#define MMSS_DP_GENERIC1_6 (0x00000340) +#define MMSS_DP_GENERIC1_7 (0x00000344) +#define MMSS_DP_GENERIC1_8 (0x00000348) +#define MMSS_DP_GENERIC1_9 (0x0000034C) + +#define MMSS_DP_VSCEXT_0 (0x000002D0) +#define MMSS_DP_VSCEXT_1 (0x000002D4) +#define MMSS_DP_VSCEXT_2 (0x000002D8) +#define MMSS_DP_VSCEXT_3 (0x000002DC) +#define MMSS_DP_VSCEXT_4 (0x000002E0) +#define MMSS_DP_VSCEXT_5 (0x000002E4) +#define MMSS_DP_VSCEXT_6 (0x000002E8) +#define MMSS_DP_VSCEXT_7 (0x000002EC) +#define MMSS_DP_VSCEXT_8 (0x000002F0) +#define MMSS_DP_VSCEXT_9 (0x000002F4) + +#define MMSS_DP_BIST_ENABLE (0x00000000) +#define DP_BIST_ENABLE_DPBIST_EN (0x00000001) + +#define MMSS_DP_TIMING_ENGINE_EN (0x00000010) +#define DP_TIMING_ENGINE_EN_EN (0x00000001) + +#define MMSS_DP_INTF_CONFIG (0x00000014) +#define MMSS_DP_INTF_HSYNC_CTL (0x00000018) +#define MMSS_DP_INTF_VSYNC_PERIOD_F0 (0x0000001C) +#define MMSS_DP_INTF_VSYNC_PERIOD_F1 (0x00000020) +#define MMSS_DP_INTF_VSYNC_PULSE_WIDTH_F0 (0x00000024) +#define MMSS_DP_INTF_VSYNC_PULSE_WIDTH_F1 (0x00000028) +#define MMSS_INTF_DISPLAY_V_START_F0 (0x0000002C) +#define MMSS_INTF_DISPLAY_V_START_F1 (0x00000030) +#define MMSS_DP_INTF_DISPLAY_V_END_F0 (0x00000034) +#define MMSS_DP_INTF_DISPLAY_V_END_F1 (0x00000038) +#define MMSS_DP_INTF_ACTIVE_V_START_F0 (0x0000003C) +#define MMSS_DP_INTF_ACTIVE_V_START_F1 (0x00000040) +#define MMSS_DP_INTF_ACTIVE_V_END_F0 (0x00000044) +#define MMSS_DP_INTF_ACTIVE_V_END_F1 (0x00000048) +#define MMSS_DP_INTF_DISPLAY_HCTL (0x0000004C) +#define MMSS_DP_INTF_ACTIVE_HCTL (0x00000050) +#define MMSS_DP_INTF_POLARITY_CTL (0x00000058) + +#define MMSS_DP_TPG_MAIN_CONTROL (0x00000060) +#define MMSS_DP_DSC_DTO (0x0000007C) +#define DP_TPG_CHECKERED_RECT_PATTERN (0x00000100) + +#define MMSS_DP_TPG_VIDEO_CONFIG (0x00000064) +#define DP_TPG_VIDEO_CONFIG_BPP_8BIT (0x00000001) +#define DP_TPG_VIDEO_CONFIG_RGB (0x00000004) + +#define MMSS_DP_ASYNC_FIFO_CONFIG (0x00000088) + +/*DP PHY Register offsets */ +#define REG_DP_PHY_REVISION_ID0 (0x00000000) +#define REG_DP_PHY_REVISION_ID1 (0x00000004) +#define REG_DP_PHY_REVISION_ID2 (0x00000008) +#define REG_DP_PHY_REVISION_ID3 (0x0000000C) + +#define REG_DP_PHY_CFG (0x00000010) + +#define REG_DP_PHY_PD_CTL (0x00000018) +#define DP_PHY_PD_CTL_PWRDN (0x00000001) +#define DP_PHY_PD_CTL_PSR_PWRDN (0x00000002) +#define DP_PHY_PD_CTL_AUX_PWRDN (0x00000004) +#define DP_PHY_PD_CTL_LANE_0_1_PWRDN (0x00000008) +#define DP_PHY_PD_CTL_LANE_2_3_PWRDN (0x00000010) +#define DP_PHY_PD_CTL_PLL_PWRDN (0x00000020) +#define DP_PHY_PD_CTL_DP_CLAMP_EN (0x00000040) + +#define REG_DP_PHY_MODE (0x0000001C) + +#define REG_DP_PHY_AUX_CFG0 (0x00000020) +#define REG_DP_PHY_AUX_CFG1 (0x00000024) +#define REG_DP_PHY_AUX_CFG2 (0x00000028) +#define REG_DP_PHY_AUX_CFG3 (0x0000002C) +#define REG_DP_PHY_AUX_CFG4 (0x00000030) +#define REG_DP_PHY_AUX_CFG5 (0x00000034) +#define REG_DP_PHY_AUX_CFG6 (0x00000038) +#define REG_DP_PHY_AUX_CFG7 (0x0000003C) +#define REG_DP_PHY_AUX_CFG8 (0x00000040) +#define REG_DP_PHY_AUX_CFG9 (0x00000044) + +#define REG_DP_PHY_AUX_INTERRUPT_MASK (0x00000048) +#define PHY_AUX_STOP_ERR_MASK (0x00000001) +#define PHY_AUX_DEC_ERR_MASK (0x00000002) +#define PHY_AUX_SYNC_ERR_MASK (0x00000004) +#define PHY_AUX_ALIGN_ERR_MASK (0x00000008) +#define PHY_AUX_REQ_ERR_MASK (0x00000010) + + +#define REG_DP_PHY_AUX_INTERRUPT_CLEAR (0x0000004C) +#define REG_DP_PHY_AUX_BIST_CFG (0x00000050) + +#define REG_DP_PHY_VCO_DIV 0x0064 +#define REG_DP_PHY_TX0_TX1_LANE_CTL 0x006C +#define REG_DP_PHY_TX2_TX3_LANE_CTL 0x0088 + +#define REG_DP_PHY_SPARE0 (0x00AC) +#define DP_PHY_SPARE0_MASK (0x000F) +#define DP_PHY_SPARE0_ORIENTATION_INFO_SHIFT (0x0004) + +#define REG_DP_PHY_STATUS (0x00C0) + +/* Tx registers */ +#define REG_DP_PHY_TXn_BIST_MODE_LANENO 0x0000 +#define REG_DP_PHY_TXn_CLKBUF_ENABLE 0x0008 + +#define REG_DP_PHY_TXn_TX_EMP_POST1_LVL 0x000C +#define DP_PHY_TXn_TX_EMP_POST1_LVL_MASK 0x001F +#define DP_PHY_TXn_TX_EMP_POST1_LVL_MUX_EN 0x0020 + +#define REG_DP_PHY_TXn_TX_DRV_LVL 0x001C +#define DP_PHY_TXn_TX_DRV_LVL_MASK 0x001F +#define DP_PHY_TXn_TX_DRV_LVL_MUX_EN 0x0020 + +#define REG_DP_PHY_TXn_RESET_TSYNC_EN 0x0024 +#define REG_DP_PHY_TXn_PRE_STALL_LDO_BOOST_EN 0x0028 +#define REG_DP_PHY_TXn_TX_BAND 0x002C +#define REG_DP_PHY_TXn_SLEW_CNTL 0x0030 +#define REG_DP_PHY_TXn_INTERFACE_SELECT 0x0034 + +#define REG_DP_PHY_TXn_RES_CODE_LANE_TX 0x003C +#define REG_DP_PHY_TXn_RES_CODE_LANE_RX 0x0040 +#define REG_DP_PHY_TXn_RES_CODE_LANE_OFFSET_TX 0x0044 +#define REG_DP_PHY_TXn_RES_CODE_LANE_OFFSET_RX 0x0048 + +#define REG_DP_PHY_TXn_DEBUG_BUS_SEL 0x0058 +#define REG_DP_PHY_TXn_TRANSCEIVER_BIAS_EN 0x005C +#define REG_DP_PHY_TXn_HIGHZ_DRVR_EN 0x0060 +#define REG_DP_PHY_TXn_TX_POL_INV 0x0064 +#define REG_DP_PHY_TXn_PARRATE_REC_DETECT_IDLE_EN 0x0068 + +#define REG_DP_PHY_TXn_LANE_MODE_1 0x008C + +#define REG_DP_PHY_TXn_TRAN_DRVR_EMP_EN 0x00C0 +#define REG_DP_PHY_TXn_TX_INTERFACE_MODE 0x00C4 + +#define REG_DP_PHY_TXn_VMODE_CTRL1 0x00F0 + +/* PLL register offset */ +#define QSERDES_COM_ATB_SEL1 0x0000 +#define QSERDES_COM_ATB_SEL2 0x0004 +#define QSERDES_COM_FREQ_UPDATE 0x0008 +#define QSERDES_COM_BG_TIMER 0x000C +#define QSERDES_COM_SSC_EN_CENTER 0x0010 +#define QSERDES_COM_SSC_ADJ_PER1 0x0014 +#define QSERDES_COM_SSC_ADJ_PER2 0x0018 +#define QSERDES_COM_SSC_PER1 0x001C +#define QSERDES_COM_SSC_PER2 0x0020 +#define QSERDES_COM_SSC_STEP_SIZE1 0x0024 +#define QSERDES_COM_SSC_STEP_SIZE2 0x0028 +#define QSERDES_COM_POST_DIV 0x002C +#define QSERDES_COM_POST_DIV_MUX 0x0030 + +#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN 0x0034 +#define QSERDES_COM_BIAS_EN 0x0001 +#define QSERDES_COM_BIAS_EN_MUX 0x0002 +#define QSERDES_COM_CLKBUF_R_EN 0x0004 +#define QSERDES_COM_CLKBUF_L_EN 0x0008 +#define QSERDES_COM_EN_SYSCLK_TX_SEL 0x0010 +#define QSERDES_COM_CLKBUF_RX_DRIVE_L 0x0020 +#define QSERDES_COM_CLKBUF_RX_DRIVE_R 0x0040 + +#define QSERDES_COM_CLK_ENABLE1 0x0038 +#define QSERDES_COM_SYS_CLK_CTRL 0x003C +#define QSERDES_COM_SYSCLK_BUF_ENABLE 0x0040 +#define QSERDES_COM_PLL_EN 0x0044 +#define QSERDES_COM_PLL_IVCO 0x0048 +#define QSERDES_COM_CMN_IETRIM 0x004C +#define QSERDES_COM_CMN_IPTRIM 0x0050 + +#define QSERDES_COM_CP_CTRL_MODE0 0x0060 +#define QSERDES_COM_CP_CTRL_MODE1 0x0064 +#define QSERDES_COM_PLL_RCTRL_MODE0 0x0068 +#define QSERDES_COM_PLL_RCTRL_MODE1 0x006C +#define QSERDES_COM_PLL_CCTRL_MODE0 0x0070 +#define QSERDES_COM_PLL_CCTRL_MODE1 0x0074 +#define QSERDES_COM_PLL_CNTRL 0x0078 +#define QSERDES_COM_BIAS_EN_CTRL_BY_PSM 0x007C +#define QSERDES_COM_SYSCLK_EN_SEL 0x0080 +#define QSERDES_COM_CML_SYSCLK_SEL 0x0084 +#define QSERDES_COM_RESETSM_CNTRL 0x0088 +#define QSERDES_COM_RESETSM_CNTRL2 0x008C +#define QSERDES_COM_LOCK_CMP_EN 0x0090 +#define QSERDES_COM_LOCK_CMP_CFG 0x0094 +#define QSERDES_COM_LOCK_CMP1_MODE0 0x0098 +#define QSERDES_COM_LOCK_CMP2_MODE0 0x009C +#define QSERDES_COM_LOCK_CMP3_MODE0 0x00A0 + +#define QSERDES_COM_DEC_START_MODE0 0x00B0 +#define QSERDES_COM_DEC_START_MODE1 0x00B4 +#define QSERDES_COM_DIV_FRAC_START1_MODE0 0x00B8 +#define QSERDES_COM_DIV_FRAC_START2_MODE0 0x00BC +#define QSERDES_COM_DIV_FRAC_START3_MODE0 0x00C0 +#define QSERDES_COM_DIV_FRAC_START1_MODE1 0x00C4 +#define QSERDES_COM_DIV_FRAC_START2_MODE1 0x00C8 +#define QSERDES_COM_DIV_FRAC_START3_MODE1 0x00CC +#define QSERDES_COM_INTEGLOOP_INITVAL 0x00D0 +#define QSERDES_COM_INTEGLOOP_EN 0x00D4 +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0 0x00D8 +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0 0x00DC +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1 0x00E0 +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1 0x00E4 +#define QSERDES_COM_VCOCAL_DEADMAN_CTRL 0x00E8 +#define QSERDES_COM_VCO_TUNE_CTRL 0x00EC +#define QSERDES_COM_VCO_TUNE_MAP 0x00F0 + +#define QSERDES_COM_CMN_STATUS 0x0124 +#define QSERDES_COM_RESET_SM_STATUS 0x0128 + +#define QSERDES_COM_CLK_SEL 0x0138 +#define QSERDES_COM_HSCLK_SEL 0x013C + +#define QSERDES_COM_CORECLK_DIV_MODE0 0x0148 + +#define QSERDES_COM_SW_RESET 0x0150 +#define QSERDES_COM_CORE_CLK_EN 0x0154 +#define QSERDES_COM_C_READY_STATUS 0x0158 +#define QSERDES_COM_CMN_CONFIG 0x015C + +#define QSERDES_COM_SVS_MODE_CLK_SEL 0x0164 + +/* DP MMSS_CC registers */ +#define MMSS_DP_LINK_CMD_RCGR (0x0138) +#define MMSS_DP_LINK_CFG_RCGR (0x013C) +#define MMSS_DP_PIXEL_M (0x01B4) +#define MMSS_DP_PIXEL_N (0x01B8) + +/* DP HDCP 1.3 registers */ +#define DP_HDCP_CTRL (0x0A0) +#define DP_HDCP_STATUS (0x0A4) +#define DP_HDCP_SW_UPPER_AKSV (0x098) +#define DP_HDCP_SW_LOWER_AKSV (0x09C) +#define DP_HDCP_ENTROPY_CTRL0 (0x350) +#define DP_HDCP_ENTROPY_CTRL1 (0x35C) +#define DP_HDCP_SHA_STATUS (0x0C8) +#define DP_HDCP_RCVPORT_DATA2_0 (0x0B0) +#define DP_HDCP_RCVPORT_DATA3 (0x0A4) +#define DP_HDCP_RCVPORT_DATA4 (0x0A8) +#define DP_HDCP_RCVPORT_DATA5 (0x0C0) +#define DP_HDCP_RCVPORT_DATA6 (0x0C4) + +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL (0x024) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA (0x028) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0 (0x004) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1 (0x008) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA7 (0x00C) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA8 (0x010) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA9 (0x014) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA10 (0x018) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA11 (0x01C) +#define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12 (0x020) + +/* USB3 DP COM registers */ +#define REG_USB3_DP_COM_RESET_OVRD_CTRL (0x1C) +#define USB3_DP_COM_OVRD_CTRL_SW_DPPHY_RESET (0x01) +#define USB3_DP_COM_OVRD_CTRL_SW_DPPHY_RESET_MUX (0x02) +#define USB3_DP_COM_OVRD_CTRL_SW_USB3PHY_RESET (0x04) +#define USB3_DP_COM_OVRD_CTRL_SW_USB3PHY_RESET_MUX (0x08) + +#define REG_USB3_DP_COM_PHY_MODE_CTRL (0x00) +#define USB3_DP_COM_PHY_MODE_DP (0x03) + +#define REG_USB3_DP_COM_SW_RESET (0x04) +#define USB3_DP_COM_SW_RESET_SET (0x01) + +#define REG_USB3_DP_COM_TYPEC_CTRL (0x10) +#define USB3_DP_COM_TYPEC_CTRL_PORTSEL (0x01) +#define USB3_DP_COM_TYPEC_CTRL_PORTSEL_MUX (0x02) + +#define REG_USB3_DP_COM_SWI_CTRL (0x0c) + +#define REG_USB3_DP_COM_POWER_DOWN_CTRL (0x08) +#define USB3_DP_COM_POWER_DOWN_CTRL_SW_PWRDN (0x01) + + + +#endif /* _DP_REG_H_ */ diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index f50fefb..4b8bd2b 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1344,6 +1344,7 @@ static int __init msm_drm_register(void) msm_dsi_register(); msm_edp_register(); msm_hdmi_register(); + msm_dp_register(); adreno_register(); return platform_driver_register(&msm_platform_driver); } @@ -1352,6 +1353,7 @@ static void __exit msm_drm_unregister(void) { DBG("fini"); platform_driver_unregister(&msm_platform_driver); + msm_dp_unregister(); msm_hdmi_unregister(); adreno_unregister(); msm_edp_unregister(); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 71547e7..fc4fda1 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -159,6 +159,8 @@ struct msm_drm_private { /* DSI is shared by mdp4 and mdp5 */ struct msm_dsi *dsi[2];

+ struct msm_dp *dp; + /* when we have more than one 'msm_gpu' these need to be an array: */ struct msm_gpu *gpu; struct msm_file_private *lastctx; @@ -375,6 +377,49 @@ static inline int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, } #endif

+#ifdef CONFIG_DRM_MSM_DP +int __init msm_dp_register(void); +void __exit msm_dp_unregister(void); +int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, + struct drm_encoder *encoder); +int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder); +int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder); +void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); + +#else +static inline int __init msm_dp_register(void) +{ + return -EINVAL; +} +static inline void __exit msm_dp_unregister(void) +{ +} +static inline int msm_dp_modeset_init(struct msm_dp *dp_display, + struct drm_device *dev, + struct drm_encoder *encoder) +{ + return -EINVAL; +} +static inline int msm_dp_display_enable(struct msm_dp *dp, + struct drm_encoder *encoder) +{ + return -EINVAL; +} +static inline int msm_dp_display_disable(struct msm_dp *dp, + struct drm_encoder *encoder) +{ + return -EINVAL; +} +static inline void msm_dp_display_mode_set(struct msm_dp *dp, + struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ +} +#endif + void __init msm_mdp_register(void); void __exit msm_mdp_unregister(void); void __init msm_dpu_register(void); @@ -395,8 +440,9 @@ void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit, #else static inline int msm_debugfs_late_init(struct drm_device *dev) { return 0; } __printf(3, 4) -static inline void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit, - const char *fmt, ...) {} +static inline void msm_rd_dump_submit(struct msm_rd_state *rd, + struct msm_gem_submit *submit, + const char *fmt, ...) {} static inline void msm_rd_debugfs_cleanup(struct msm_drm_private *priv) {} static inline void msm_perf_debugfs_cleanup(struct msm_drm_private *priv) {} #endif @@ -414,7 +460,8 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name, int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx); struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx, u32 id); -int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx, +int msm_submitqueue_create(struct drm_device *drm, + struct msm_file_private *ctx, u32 prio, u32 flags, u32 *id); int msm_submitqueue_query(struct drm_device *drm, struct msm_file_private *ctx, struct drm_msm_submitqueue_query *args);

From: Jeykumar Sankaran jsanka@codeaurora.org

Add display port support in DPU by creating hooks for DP encoder enumeration and encoder mode initialization.

This change is based on the Snapdragon Display port driver changes[1].

changes in v2: - rebase on [2] (Sean Paul) - remove unwanted error checks and switch cases (Jordan Crouse)

[1] https://lwn.net/Articles/768265/ [2] https://lkml.org/lkml/2018/11/17/87

changes in V3: -- Moved this change as part of the DP driver changes. -- Addressed compilation issues on the latest code base.

Signed-off-by: Jeykumar Sankaran jsanka@codeaurora.org Signed-off-by: Chandan Uddaraju chandanu@codeaurora.org Signed-off-by: Vara Reddy varar@codeaurora.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 8 ++-- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 65 ++++++++++++++++++++++++----- 2 files changed, 58 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index b063243..7c95f72 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -2025,7 +2025,7 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc, { int ret = 0; int i = 0; - enum dpu_intf_type intf_type; + enum dpu_intf_type intf_type = INTF_NONE; struct dpu_enc_phys_init_params phys_params;

if (!dpu_enc) { @@ -2047,9 +2047,9 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc, case DRM_MODE_ENCODER_DSI: intf_type = INTF_DSI; break; - default: - DPU_ERROR_ENC(dpu_enc, "unsupported display interface type\n"); - return -EINVAL; + case DRM_MODE_ENCODER_TMDS: + intf_type = INTF_DP; + break; }

WARN_ON(disp_info->num_of_h_tiles < 1); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index cb08faf..441c274a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -421,6 +421,33 @@ static int _dpu_kms_initialize_dsi(struct drm_device *dev, return rc; }

+static int _dpu_kms_initialize_displayport(struct drm_device *dev, + struct msm_drm_private *priv, + struct dpu_kms *dpu_kms) +{ + struct drm_encoder *encoder = NULL; + int rc = 0; + + if (!priv->dp) + return rc; + + encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_TMDS); + if (IS_ERR(encoder)) { + DPU_ERROR("encoder init failed for dsi display\n"); + return PTR_ERR(encoder);; + } + + rc = msm_dp_modeset_init(priv->dp, dev, encoder); + if (rc) { + DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc); + drm_encoder_cleanup(encoder); + return rc; + } + + priv->encoders[priv->num_encoders++] = encoder; + return rc; +} + /** * _dpu_kms_setup_displays - create encoders, bridges and connectors * for underlying displays @@ -433,12 +460,21 @@ static int _dpu_kms_setup_displays(struct drm_device *dev, struct msm_drm_private *priv, struct dpu_kms *dpu_kms) { - /** - * Extend this function to initialize other - * types of displays - */ + int rc = 0; + + rc = _dpu_kms_initialize_dsi(dev, priv, dpu_kms); + if (rc) { + DPU_ERROR("initialize_dsi failed, rc = %d\n", rc); + return rc; + }

- return _dpu_kms_initialize_dsi(dev, priv, dpu_kms); + rc = _dpu_kms_initialize_displayport(dev, priv, dpu_kms); + if (rc) { + DPU_ERROR("initialize_DP failed, rc = %d\n", rc); + return rc; + } + + return rc; }

static void _dpu_kms_drm_obj_destroy(struct dpu_kms *dpu_kms) @@ -626,13 +662,20 @@ static void _dpu_kms_set_encoder_mode(struct msm_kms *kms, info.capabilities = cmd_mode ? MSM_DISPLAY_CAP_CMD_MODE : MSM_DISPLAY_CAP_VID_MODE;

- /* TODO: No support for DSI swap */ - for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) { - if (priv->dsi[i]) { - info.h_tile_instance[info.num_of_h_tiles] = i; - info.num_of_h_tiles++; + switch (info.intf_type) { + case DRM_MODE_ENCODER_DSI: + /* TODO: No support for DSI swap */ + for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) { + if (priv->dsi[i]) { + info.h_tile_instance[info.num_of_h_tiles] = i; + info.num_of_h_tiles++; + } } - } + break; + case DRM_MODE_ENCODER_TMDS: + info.num_of_h_tiles = 1; + break; + };

rc = dpu_encoder_setup(encoder->dev, encoder, &info); if (rc)