[PATCH v2 0/5] drm: add support for Cadence MHDP DPI/DP bridge.

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Damian Kos

24 Jul 2018 24 Jul '18

11:13 a.m.

Hello!

This is the series of patches that will add support for the Cadence's DPI/DP bridge. Please note that this is a preliminary version of the driver and there will be more patches in the future with updates, fixes and improvements. Please keep that in mind when looking at FIXME/TODO/XXX comments.

Initially, MHDP driver was developed as a DRM bridge driver and was planed to be placed in drivers/gpu/drm/bridge/mhdp.c. However, there was already a driver for Cadence's DP controller developed by RockChip, but that driver uses the different DRM framework and looks like a part of a bigger system. Both controllers (including firmware) are quite different internally (MST/FEC/DSC support, link training done by driver, additional commands, IRQ's etc.) but they have similar register map, except for Framer/Streamer (which is noticeably different), so they appear similar.

The following patches contain: - Moving common code to drivers/gpu/drm/bridge/cdns-mhdp-common.* and modifying it a bit (mostly new prefixes for functions and data types) so it can be used by two, higher level, drivers. - Modifying existing RockChip's DP driver to use the common code after changes made to it (use the new cdns_mhdp_device structure and new function names). - Modifying DRM helpers a bit. Some are required for new driver, some are updates from DP 1.2 to 1.3 or 1.4. - Adding documentation for device tree bindings. - Adding preliminary Cadence DPI/DP bridge driver.

Some of the things that will be added later on include (but are not limited to): - Support for Cadence SD0801 PHY (PHY's driver should be on the way by now) - SST audio support - MST support - DSC support - FEC support - HDCP support

Changes in v2: - Added actual description of what the patch contains, what is it for and what's going on here in general. - New structure. Now we have one common low level driver + two high level drivers - one for RockChip with minimum changes and one, more general, for Cadence. - Dropped some changes made to DRM helpers. - Updated the device tree bindings document.

Damian Kos (1): drm/rockchip: moved cdns mhdp dpi/dp bridge low driver to a new location

Quentin Schulz (4): drm/dp: fix link probing for devices supporting DP 1.4+ drm/dp: make dp_link_status and dp_get_lane_status usable from outside of the core dt-bindings: drm/bridge Document Cadence MHDP DPI/DP bridge bindings drm/bridge: add preliminary driver for cadence dpi/dp bridge

.../bindings/display/bridge/cdns,mhdp.txt | 43 + drivers/gpu/drm/bridge/Kconfig | 7 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/cdns-mhdp-common.c | 1087 +++++++++++++++ .../cdns-mhdp-common.h} | 134 +- drivers/gpu/drm/bridge/cdns-mhdp.c | 1233 +++++++++++++++++ drivers/gpu/drm/drm_dp_helper.c | 50 +- drivers/gpu/drm/rockchip/Kconfig | 1 + drivers/gpu/drm/rockchip/Makefile | 4 +- drivers/gpu/drm/rockchip/cdn-dp-core.c | 220 +-- drivers/gpu/drm/rockchip/cdn-dp-core.h | 40 +- drivers/gpu/drm/rockchip/cdn-dp-reg.c | 969 ------------- include/drm/drm_dp_helper.h | 4 + 13 files changed, 2648 insertions(+), 1145 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-common.c rename drivers/gpu/drm/{rockchip/cdn-dp-reg.h => bridge/cdns-mhdp-common.h} (80%) create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp.c delete mode 100644 drivers/gpu/drm/rockchip/cdn-dp-reg.c

-- 2.17.1

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Damian Kos

24 Jul 24 Jul

11:13 a.m.

New subject: [PATCH v2 1/5] drm/rockchip: moved cdns mhdp dpi/dp bridge low driver to a new location

- Moved cdn-dp-reg from drivers/gpu/drm/rockchip to a new location in drivers/drm/bridge/cadence and renamed it to cdns-mhdp-common. - Extracted common fields from cdn_dp_device to a new cdns_mhdp_device structure which will be used by two separate drivers later on. - Moved some datatypes (audio_format, audio_info, vic_pxl_encoding_format, video_info) from cdn-dp-core.c to cdns-mhdp-common.h. - Changed prefixes from cdn_dp to cdns_mhdp cdn -> cdns to match the other Cadence's drivers dp -> mhdp to distinguish it from a "just a DP" as the IP underneath this registers map can be a HDMI (which is internally different, but the interface for commands, events is pretty much the same). - Modified cdn-dp-core.c to use the new driver structure and new function names. - Changed the CONFIG_ROCKCHIP_CDN_DP configuration to automatically select the Cadence MHDP DPI/DP bridge (DRM_CDNS_MHDP).

Signed-off-by: Damian Kos dkos@cadence.com --- drivers/gpu/drm/bridge/Kconfig | 7 + drivers/gpu/drm/bridge/Makefile | 1 + .../cdns-mhdp-common.c} | 434 +++++++++--------- .../cdns-mhdp-common.h} | 123 ++++- drivers/gpu/drm/rockchip/Kconfig | 1 + drivers/gpu/drm/rockchip/Makefile | 4 +- drivers/gpu/drm/rockchip/cdn-dp-core.c | 220 ++++----- drivers/gpu/drm/rockchip/cdn-dp-core.h | 40 +- 8 files changed, 453 insertions(+), 377 deletions(-) rename drivers/gpu/drm/{rockchip/cdn-dp-reg.c => bridge/cdns-mhdp-common.c} (53%) rename drivers/gpu/drm/{rockchip/cdn-dp-reg.h => bridge/cdns-mhdp-common.h} (83%)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index bf6cad6c9178..31b75c971454 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -35,6 +35,13 @@ config DRM_CDNS_DSI Support Cadence DPI to DSI bridge. This is an internal bridge and is meant to be directly embedded in a SoC.

+config DRM_CDNS_MHDP + tristate "Cadence MHDP DPI/DP bridge" + select DRM_KMS_HELPER + depends on OF + help + Support for Cadence DPI to DP bridge. + config DRM_DUMB_VGA_DAC tristate "Dumb VGA DAC Bridge support" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 35f88d48ec20..c9b35f736a00 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o +obj-$(CONFIG_DRM_CDNS_MHDP) += cdns-mhdp-common.o obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.c b/drivers/gpu/drm/bridge/cdns-mhdp-common.c similarity index 53% rename from drivers/gpu/drm/rockchip/cdn-dp-reg.c rename to drivers/gpu/drm/bridge/cdns-mhdp-common.c index 3105965fc260..813319481220 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-reg.c +++ b/drivers/gpu/drm/bridge/cdns-mhdp-common.c @@ -19,22 +19,24 @@ #include <linux/iopoll.h> #include <linux/reset.h>

-#include "cdn-dp-core.h" -#include "cdn-dp-reg.h" +#include <drm/drm_print.h> +#include <drm/drm_modes.h>

-#define CDN_DP_SPDIF_CLK 200000000 +#include "cdns-mhdp-common.h" + +#define CDNS_DP_SPDIF_CLK 200000000 #define FW_ALIVE_TIMEOUT_US 1000000 #define MAILBOX_RETRY_US 1000 #define MAILBOX_TIMEOUT_US 5000000 #define LINK_TRAINING_RETRY_MS 20 #define LINK_TRAINING_TIMEOUT_MS 500

-void cdn_dp_set_fw_clk(struct cdn_dp_device *dp, unsigned long clk) +void cdns_mhdp_set_fw_clk(struct cdns_mhdp_device *mhdp, unsigned long clk) { - writel(clk / 1000000, dp->regs + SW_CLK_H); + writel(clk / 1000000, mhdp->regs + SW_CLK_H); }

-void cdn_dp_clock_reset(struct cdn_dp_device *dp) +void cdns_mhdp_clock_reset(struct cdns_mhdp_device *mhdp) { u32 val;

@@ -50,16 +52,16 @@ void cdn_dp_clock_reset(struct cdn_dp_device *dp) DPTX_SYS_CLK_EN | CFG_DPTX_VIF_CLK_RSTN_EN | CFG_DPTX_VIF_CLK_EN; - writel(val, dp->regs + SOURCE_DPTX_CAR); + writel(val, mhdp->regs + SOURCE_DPTX_CAR);

val = SOURCE_PHY_RSTN_EN | SOURCE_PHY_CLK_EN; - writel(val, dp->regs + SOURCE_PHY_CAR); + writel(val, mhdp->regs + SOURCE_PHY_CAR);

val = SOURCE_PKT_SYS_RSTN_EN | SOURCE_PKT_SYS_CLK_EN | SOURCE_PKT_DATA_RSTN_EN | SOURCE_PKT_DATA_CLK_EN; - writel(val, dp->regs + SOURCE_PKT_CAR); + writel(val, mhdp->regs + SOURCE_PKT_CAR);

val = SPDIF_CDR_CLK_RSTN_EN | SPDIF_CDR_CLK_EN | @@ -67,53 +69,53 @@ void cdn_dp_clock_reset(struct cdn_dp_device *dp) SOURCE_AIF_SYS_CLK_EN | SOURCE_AIF_CLK_RSTN_EN | SOURCE_AIF_CLK_EN; - writel(val, dp->regs + SOURCE_AIF_CAR); + writel(val, mhdp->regs + SOURCE_AIF_CAR);

val = SOURCE_CIPHER_SYSTEM_CLK_RSTN_EN | SOURCE_CIPHER_SYS_CLK_EN | SOURCE_CIPHER_CHAR_CLK_RSTN_EN | SOURCE_CIPHER_CHAR_CLK_EN; - writel(val, dp->regs + SOURCE_CIPHER_CAR); + writel(val, mhdp->regs + SOURCE_CIPHER_CAR);

val = SOURCE_CRYPTO_SYS_CLK_RSTN_EN | SOURCE_CRYPTO_SYS_CLK_EN; - writel(val, dp->regs + SOURCE_CRYPTO_CAR); + writel(val, mhdp->regs + SOURCE_CRYPTO_CAR);

/* enable Mailbox and PIF interrupt */ - writel(0, dp->regs + APB_INT_MASK); + writel(0, mhdp->regs + APB_INT_MASK); }

-static int cdn_dp_mailbox_read(struct cdn_dp_device *dp) +static int cdns_mhdp_mailbox_read(struct cdns_mhdp_device *mhdp) { int val, ret;

- ret = readx_poll_timeout(readl, dp->regs + MAILBOX_EMPTY_ADDR, + ret = readx_poll_timeout(readl, mhdp->regs + MAILBOX_EMPTY_ADDR, val, !val, MAILBOX_RETRY_US, MAILBOX_TIMEOUT_US); if (ret < 0) return ret;

- return readl(dp->regs + MAILBOX0_RD_DATA) & 0xff; + return readl(mhdp->regs + MAILBOX0_RD_DATA) & 0xff; }

-static int cdp_dp_mailbox_write(struct cdn_dp_device *dp, u8 val) +static int cdp_dp_mailbox_write(struct cdns_mhdp_device *mhdp, u8 val) { int ret, full;

- ret = readx_poll_timeout(readl, dp->regs + MAILBOX_FULL_ADDR, + ret = readx_poll_timeout(readl, mhdp->regs + MAILBOX_FULL_ADDR, full, !full, MAILBOX_RETRY_US, MAILBOX_TIMEOUT_US); if (ret < 0) return ret;

- writel(val, dp->regs + MAILBOX0_WR_DATA); + writel(val, mhdp->regs + MAILBOX0_WR_DATA);

return 0; }

-static int cdn_dp_mailbox_validate_receive(struct cdn_dp_device *dp, - u8 module_id, u8 opcode, - u8 req_size) +static int cdns_mhdp_mailbox_validate_receive(struct cdns_mhdp_device *mhdp, + u8 module_id, u8 opcode, + u8 req_size) { u32 mbox_size, i; u8 header[4]; @@ -121,7 +123,7 @@ static int cdn_dp_mailbox_validate_receive(struct cdn_dp_device *dp,

/* read the header of the message */ for (i = 0; i < 4; i++) { - ret = cdn_dp_mailbox_read(dp); + ret = cdns_mhdp_mailbox_read(mhdp); if (ret < 0) return ret;

@@ -137,7 +139,7 @@ static int cdn_dp_mailbox_validate_receive(struct cdn_dp_device *dp, * clear the mailbox by reading its contents. */ for (i = 0; i < mbox_size; i++) - if (cdn_dp_mailbox_read(dp) < 0) + if (cdns_mhdp_mailbox_read(mhdp) < 0) break;

return -EINVAL; @@ -146,14 +148,14 @@ static int cdn_dp_mailbox_validate_receive(struct cdn_dp_device *dp, return 0; }

-static int cdn_dp_mailbox_read_receive(struct cdn_dp_device *dp, - u8 *buff, u8 buff_size) +static int cdns_mhdp_mailbox_read_receive(struct cdns_mhdp_device *mhdp, + u8 *buff, u8 buff_size) { u32 i; int ret;

for (i = 0; i < buff_size; i++) { - ret = cdn_dp_mailbox_read(dp); + ret = cdns_mhdp_mailbox_read(mhdp); if (ret < 0) return ret;

@@ -163,8 +165,8 @@ static int cdn_dp_mailbox_read_receive(struct cdn_dp_device *dp, return 0; }

-static int cdn_dp_mailbox_send(struct cdn_dp_device *dp, u8 module_id, - u8 opcode, u16 size, u8 *message) +static int cdns_mhdp_mailbox_send(struct cdns_mhdp_device *mhdp, u8 module_id, + u8 opcode, u16 size, u8 *message) { u8 header[4]; int ret, i; @@ -175,13 +177,13 @@ static int cdn_dp_mailbox_send(struct cdn_dp_device *dp, u8 module_id, header[3] = size & 0xff;

for (i = 0; i < 4; i++) { - ret = cdp_dp_mailbox_write(dp, header[i]); + ret = cdp_dp_mailbox_write(mhdp, header[i]); if (ret) return ret; }

for (i = 0; i < size; i++) { - ret = cdp_dp_mailbox_write(dp, message[i]); + ret = cdp_dp_mailbox_write(mhdp, message[i]); if (ret) return ret; } @@ -189,7 +191,7 @@ static int cdn_dp_mailbox_send(struct cdn_dp_device *dp, u8 module_id, return 0; }

-static int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val) +static int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val) { u8 msg[6];

@@ -199,12 +201,12 @@ static int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val) msg[3] = (val >> 16) & 0xff; msg[4] = (val >> 8) & 0xff; msg[5] = val & 0xff; - return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_REGISTER, - sizeof(msg), msg); + return cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_WRITE_REGISTER, sizeof(msg), msg); }

-static int cdn_dp_reg_write_bit(struct cdn_dp_device *dp, u16 addr, - u8 start_bit, u8 bits_no, u32 val) +static int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr, + u8 start_bit, u8 bits_no, u32 val) { u8 field[8];

@@ -217,11 +219,12 @@ static int cdn_dp_reg_write_bit(struct cdn_dp_device *dp, u16 addr, field[6] = (val >> 8) & 0xff; field[7] = val & 0xff;

- return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_FIELD, - sizeof(field), field); + return cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_WRITE_FIELD, sizeof(field), field); }

-int cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len) +int cdns_mhdp_dpcd_read(struct cdns_mhdp_device *mhdp, + u32 addr, u8 *data, u16 len) { u8 msg[5], reg[5]; int ret; @@ -231,28 +234,28 @@ int cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len) msg[2] = (addr >> 16) & 0xff; msg[3] = (addr >> 8) & 0xff; msg[4] = addr & 0xff; - ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_READ_DPCD, - sizeof(msg), msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_DPCD, sizeof(msg), msg); if (ret) goto err_dpcd_read;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_READ_DPCD, - sizeof(reg) + len); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_DPCD, + sizeof(reg) + len); if (ret) goto err_dpcd_read;

- ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg)); if (ret) goto err_dpcd_read;

- ret = cdn_dp_mailbox_read_receive(dp, data, len); + ret = cdns_mhdp_mailbox_read_receive(mhdp, data, len);

err_dpcd_read: return ret; }

-int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value) +int cdns_mhdp_dpcd_write(struct cdns_mhdp_device *mhdp, u32 addr, u8 value) { u8 msg[6], reg[5]; int ret; @@ -263,17 +266,17 @@ int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value) msg[3] = (addr >> 8) & 0xff; msg[4] = addr & 0xff; msg[5] = value; - ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_DPCD, - sizeof(msg), msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_WRITE_DPCD, sizeof(msg), msg); if (ret) goto err_dpcd_write;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_WRITE_DPCD, sizeof(reg)); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_DP_TX, + DPTX_WRITE_DPCD, sizeof(reg)); if (ret) goto err_dpcd_write;

- ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg)); if (ret) goto err_dpcd_write;

@@ -282,53 +285,53 @@ int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value)

err_dpcd_write: if (ret) - DRM_DEV_ERROR(dp->dev, "dpcd write failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "dpcd write failed: %d\n", ret); return ret; }

-int cdn_dp_load_firmware(struct cdn_dp_device *dp, const u32 *i_mem, - u32 i_size, const u32 *d_mem, u32 d_size) +int cdns_mhdp_load_firmware(struct cdns_mhdp_device *mhdp, const u32 *i_mem, + u32 i_size, const u32 *d_mem, u32 d_size) { u32 reg; int i, ret;

/* reset ucpu before load firmware*/ writel(APB_IRAM_PATH | APB_DRAM_PATH | APB_XT_RESET, - dp->regs + APB_CTRL); + mhdp->regs + APB_CTRL);

for (i = 0; i < i_size; i += 4) - writel(*i_mem++, dp->regs + ADDR_IMEM + i); + writel(*i_mem++, mhdp->regs + ADDR_IMEM + i);

for (i = 0; i < d_size; i += 4) - writel(*d_mem++, dp->regs + ADDR_DMEM + i); + writel(*d_mem++, mhdp->regs + ADDR_DMEM + i);

/* un-reset ucpu */ - writel(0, dp->regs + APB_CTRL); + writel(0, mhdp->regs + APB_CTRL);

/* check the keep alive register to make sure fw working */ - ret = readx_poll_timeout(readl, dp->regs + KEEP_ALIVE, + ret = readx_poll_timeout(readl, mhdp->regs + KEEP_ALIVE, reg, reg, 2000, FW_ALIVE_TIMEOUT_US); if (ret < 0) { - DRM_DEV_ERROR(dp->dev, "failed to loaded the FW reg = %x\n", + DRM_DEV_ERROR(mhdp->dev, "failed to loaded the FW reg = %x\n", reg); return -EINVAL; }

- reg = readl(dp->regs + VER_L) & 0xff; - dp->fw_version = reg; - reg = readl(dp->regs + VER_H) & 0xff; - dp->fw_version |= reg << 8; - reg = readl(dp->regs + VER_LIB_L_ADDR) & 0xff; - dp->fw_version |= reg << 16; - reg = readl(dp->regs + VER_LIB_H_ADDR) & 0xff; - dp->fw_version |= reg << 24; + reg = readl(mhdp->regs + VER_L) & 0xff; + mhdp->fw_version = reg; + reg = readl(mhdp->regs + VER_H) & 0xff; + mhdp->fw_version |= reg << 8; + reg = readl(mhdp->regs + VER_LIB_L_ADDR) & 0xff; + mhdp->fw_version |= reg << 16; + reg = readl(mhdp->regs + VER_LIB_H_ADDR) & 0xff; + mhdp->fw_version |= reg << 24;

- DRM_DEV_DEBUG(dp->dev, "firmware version: %x\n", dp->fw_version); + DRM_DEV_DEBUG(mhdp->dev, "firmware version: %x\n", mhdp->fw_version);

return 0; }

-int cdn_dp_set_firmware_active(struct cdn_dp_device *dp, bool enable) +int cdns_mhdp_set_firmware_active(struct cdns_mhdp_device *mhdp, bool enable) { u8 msg[5]; int ret, i; @@ -340,14 +343,14 @@ int cdn_dp_set_firmware_active(struct cdn_dp_device *dp, bool enable) msg[4] = enable ? FW_ACTIVE : FW_STANDBY;

for (i = 0; i < sizeof(msg); i++) { - ret = cdp_dp_mailbox_write(dp, msg[i]); + ret = cdp_dp_mailbox_write(mhdp, msg[i]); if (ret) goto err_set_firmware_active; }

/* read the firmware state */ for (i = 0; i < sizeof(msg); i++) { - ret = cdn_dp_mailbox_read(dp); + ret = cdns_mhdp_mailbox_read(mhdp); if (ret < 0) goto err_set_firmware_active;

@@ -358,16 +361,16 @@ int cdn_dp_set_firmware_active(struct cdn_dp_device *dp, bool enable)

err_set_firmware_active: if (ret < 0) - DRM_DEV_ERROR(dp->dev, "set firmware active failed\n"); + DRM_DEV_ERROR(mhdp->dev, "set firmware active failed\n"); return ret; }

-int cdn_dp_set_host_cap(struct cdn_dp_device *dp, u8 lanes, bool flip) +int cdns_mhdp_set_host_cap(struct cdns_mhdp_device *mhdp, u8 lanes, bool flip) { u8 msg[8]; int ret;

- msg[0] = CDN_DP_MAX_LINK_RATE; + msg[0] = CDNS_DP_MAX_LINK_RATE; msg[1] = lanes | SCRAMBLER_EN; msg[2] = VOLTAGE_LEVEL_2; msg[3] = PRE_EMPHASIS_LEVEL_3; @@ -376,22 +379,22 @@ int cdn_dp_set_host_cap(struct cdn_dp_device *dp, u8 lanes, bool flip) msg[6] = flip ? LANE_MAPPING_FLIPPED : LANE_MAPPING_NORMAL; msg[7] = ENHANCED;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, - DPTX_SET_HOST_CAPABILITIES, - sizeof(msg), msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_SET_HOST_CAPABILITIES, + sizeof(msg), msg); if (ret) goto err_set_host_cap;

- ret = cdn_dp_reg_write(dp, DP_AUX_SWAP_INVERSION_CONTROL, - AUX_HOST_INVERT); + ret = cdns_mhdp_reg_write(mhdp, DP_AUX_SWAP_INVERSION_CONTROL, + AUX_HOST_INVERT);

err_set_host_cap: if (ret) - DRM_DEV_ERROR(dp->dev, "set host cap failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "set host cap failed: %d\n", ret); return ret; }

-int cdn_dp_event_config(struct cdn_dp_device *dp) +int cdns_mhdp_event_config(struct cdns_mhdp_device *mhdp) { u8 msg[5]; int ret; @@ -400,49 +403,50 @@ int cdn_dp_event_config(struct cdn_dp_device *dp)

msg[0] = DPTX_EVENT_ENABLE_HPD | DPTX_EVENT_ENABLE_TRAINING;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_ENABLE_EVENT, - sizeof(msg), msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_ENABLE_EVENT, sizeof(msg), msg); if (ret) - DRM_DEV_ERROR(dp->dev, "set event config failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "set event config failed: %d\n", ret);

return ret; }

-u32 cdn_dp_get_event(struct cdn_dp_device *dp) +u32 cdns_mhdp_get_event(struct cdns_mhdp_device *mhdp) { - return readl(dp->regs + SW_EVENTS0); + return readl(mhdp->regs + SW_EVENTS0); }

-int cdn_dp_get_hpd_status(struct cdn_dp_device *dp) +int cdns_mhdp_get_hpd_status(struct cdns_mhdp_device *mhdp) { u8 status; int ret;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_HPD_STATE, - 0, NULL); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_HPD_STATE, 0, NULL); if (ret) goto err_get_hpd;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_HPD_STATE, sizeof(status)); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_DP_TX, + DPTX_HPD_STATE, + sizeof(status)); if (ret) goto err_get_hpd;

- ret = cdn_dp_mailbox_read_receive(dp, &status, sizeof(status)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, &status, sizeof(status)); if (ret) goto err_get_hpd;

return status;

err_get_hpd: - DRM_DEV_ERROR(dp->dev, "get hpd status failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "get hpd status failed: %d\n", ret); return ret; }

-int cdn_dp_get_edid_block(void *data, u8 *edid, +int cdns_mhdp_get_edid_block(void *data, u8 *edid, unsigned int block, size_t length) { - struct cdn_dp_device *dp = data; + struct cdns_mhdp_device *mhdp = data; u8 msg[2], reg[2], i; int ret;

@@ -450,22 +454,23 @@ int cdn_dp_get_edid_block(void *data, u8 *edid, msg[0] = block / 2; msg[1] = block % 2;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_GET_EDID, - sizeof(msg), msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_GET_EDID, sizeof(msg), msg); if (ret) continue;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_GET_EDID, - sizeof(reg) + length); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, + MB_MODULE_ID_DP_TX, + DPTX_GET_EDID, + sizeof(reg) + length); if (ret) continue;

- ret = cdn_dp_mailbox_read_receive(dp, reg, sizeof(reg)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg)); if (ret) continue;

- ret = cdn_dp_mailbox_read_receive(dp, edid, length); + ret = cdns_mhdp_mailbox_read_receive(mhdp, edid, length); if (ret) continue;

@@ -474,13 +479,13 @@ int cdn_dp_get_edid_block(void *data, u8 *edid, }

if (ret) - DRM_DEV_ERROR(dp->dev, "get block[%d] edid failed: %d\n", block, - ret); + DRM_DEV_ERROR(mhdp->dev, "get block[%d] edid failed: %d\n", + block, ret);

return ret; }

-static int cdn_dp_training_start(struct cdn_dp_device *dp) +static int cdns_mhdp_training_start(struct cdns_mhdp_device *mhdp) { unsigned long timeout; u8 msg, event[2]; @@ -489,26 +494,28 @@ static int cdn_dp_training_start(struct cdn_dp_device *dp) msg = LINK_TRAINING_RUN;

/* start training */ - ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_TRAINING_CONTROL, - sizeof(msg), &msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_TRAINING_CONTROL, sizeof(msg), &msg); if (ret) goto err_training_start;

timeout = jiffies + msecs_to_jiffies(LINK_TRAINING_TIMEOUT_MS); while (time_before(jiffies, timeout)) { msleep(LINK_TRAINING_RETRY_MS); - ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, - DPTX_READ_EVENT, 0, NULL); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_EVENT, 0, NULL); if (ret) goto err_training_start;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_READ_EVENT, - sizeof(event)); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, + MB_MODULE_ID_DP_TX, + DPTX_READ_EVENT, + sizeof(event)); if (ret) goto err_training_start;

- ret = cdn_dp_mailbox_read_receive(dp, event, sizeof(event)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, event, + sizeof(event)); if (ret) goto err_training_start;

@@ -519,77 +526,80 @@ static int cdn_dp_training_start(struct cdn_dp_device *dp) ret = -ETIMEDOUT;

err_training_start: - DRM_DEV_ERROR(dp->dev, "training failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "training failed: %d\n", ret); return ret; }

-static int cdn_dp_get_training_status(struct cdn_dp_device *dp) +static int cdns_mhdp_get_training_status(struct cdns_mhdp_device *mhdp) { u8 status[10]; int ret;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_READ_LINK_STAT, - 0, NULL); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_LINK_STAT, 0, NULL); if (ret) goto err_get_training_status;

- ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX, - DPTX_READ_LINK_STAT, - sizeof(status)); + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_LINK_STAT, + sizeof(status)); if (ret) goto err_get_training_status;

- ret = cdn_dp_mailbox_read_receive(dp, status, sizeof(status)); + ret = cdns_mhdp_mailbox_read_receive(mhdp, status, sizeof(status)); if (ret) goto err_get_training_status;

- dp->link.rate = status[0]; - dp->link.num_lanes = status[1]; + mhdp->link.rate = status[0]; + mhdp->link.num_lanes = status[1];

err_get_training_status: if (ret) - DRM_DEV_ERROR(dp->dev, "get training status failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "get training status failed: %d\n", + ret); return ret; }

-int cdn_dp_train_link(struct cdn_dp_device *dp) +int cdns_mhdp_train_link(struct cdns_mhdp_device *mhdp) { int ret;

- ret = cdn_dp_training_start(dp); + ret = cdns_mhdp_training_start(mhdp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to start training %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "Failed to start training %d\n", + ret); return ret; }

- ret = cdn_dp_get_training_status(dp); + ret = cdns_mhdp_get_training_status(mhdp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to get training stat %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "Failed to get training stat %d\n", + ret); return ret; }

- DRM_DEV_DEBUG_KMS(dp->dev, "rate:0x%x, lanes:%d\n", dp->link.rate, - dp->link.num_lanes); + DRM_DEV_DEBUG_KMS(mhdp->dev, "rate:0x%x, lanes:%d\n", mhdp->link.rate, + mhdp->link.num_lanes); return ret; }

-int cdn_dp_set_video_status(struct cdn_dp_device *dp, int active) +int cdns_mhdp_set_video_status(struct cdns_mhdp_device *mhdp, int active) { u8 msg; int ret;

msg = !!active;

- ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_SET_VIDEO, - sizeof(msg), &msg); + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_SET_VIDEO, sizeof(msg), &msg); if (ret) - DRM_DEV_ERROR(dp->dev, "set video status failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "set video status failed: %d\n", ret);

return ret; }

-static int cdn_dp_get_msa_misc(struct video_info *video, - struct drm_display_mode *mode) +static int cdns_mhdp_get_msa_misc(struct video_info *video, + struct drm_display_mode *mode) { u32 msa_misc; u8 val[2] = {0}; @@ -635,10 +645,10 @@ static int cdn_dp_get_msa_misc(struct video_info *video, return msa_misc; }

-int cdn_dp_config_video(struct cdn_dp_device *dp) +int cdns_mhdp_config_video(struct cdns_mhdp_device *mhdp) { - struct video_info *video = &dp->video_info; - struct drm_display_mode *mode = &dp->mode; + struct video_info *video = &mhdp->video_info; + struct drm_display_mode *mode = &mhdp->mode; u64 symbol; u32 val, link_rate, rem; u8 bit_per_pix, tu_size_reg = TU_SIZE; @@ -647,13 +657,13 @@ int cdn_dp_config_video(struct cdn_dp_device *dp) bit_per_pix = (video->color_fmt == YCBCR_4_2_2) ? (video->color_depth * 2) : (video->color_depth * 3);

- link_rate = drm_dp_bw_code_to_link_rate(dp->link.rate) / 1000; + link_rate = drm_dp_bw_code_to_link_rate(mhdp->link.rate) / 1000;

- ret = cdn_dp_reg_write(dp, BND_HSYNC2VSYNC, VIF_BYPASS_INTERLACE); + ret = cdns_mhdp_reg_write(mhdp, BND_HSYNC2VSYNC, VIF_BYPASS_INTERLACE); if (ret) goto err_config_video;

- ret = cdn_dp_reg_write(dp, HSYNC2VSYNC_POL_CTRL, 0); + ret = cdns_mhdp_reg_write(mhdp, HSYNC2VSYNC_POL_CTRL, 0); if (ret) goto err_config_video;

@@ -667,13 +677,13 @@ int cdn_dp_config_video(struct cdn_dp_device *dp) do { tu_size_reg += 2; symbol = tu_size_reg * mode->clock * bit_per_pix; - do_div(symbol, dp->link.num_lanes * link_rate * 8); + do_div(symbol, mhdp->link.num_lanes * link_rate * 8); rem = do_div(symbol, 1000); if (tu_size_reg > 64) { ret = -EINVAL; - DRM_DEV_ERROR(dp->dev, + DRM_DEV_ERROR(mhdp->dev, "tu error, clk:%d, lanes:%d, rate:%d\n", - mode->clock, dp->link.num_lanes, + mode->clock, mhdp->link.num_lanes, link_rate); goto err_config_video; } @@ -682,16 +692,16 @@ int cdn_dp_config_video(struct cdn_dp_device *dp)

val = symbol + (tu_size_reg << 8); val |= TU_CNT_RST_EN; - ret = cdn_dp_reg_write(dp, DP_FRAMER_TU, val); + ret = cdns_mhdp_reg_write(mhdp, DP_FRAMER_TU, val); if (ret) goto err_config_video;

/* set the FIFO Buffer size */ val = div_u64(mode->clock * (symbol + 1), 1000) + link_rate; - val /= (dp->link.num_lanes * link_rate); + val /= (mhdp->link.num_lanes * link_rate); val = div_u64(8 * (symbol + 1), bit_per_pix) - val; val += 2; - ret = cdn_dp_reg_write(dp, DP_VC_TABLE(15), val); + ret = cdns_mhdp_reg_write(mhdp, DP_VC_TABLE(15), val);

switch (video->color_depth) { case 6: @@ -712,136 +722,137 @@ int cdn_dp_config_video(struct cdn_dp_device *dp) };

val += video->color_fmt << 8; - ret = cdn_dp_reg_write(dp, DP_FRAMER_PXL_REPR, val); + ret = cdns_mhdp_reg_write(mhdp, DP_FRAMER_PXL_REPR, val); if (ret) goto err_config_video;

val = video->h_sync_polarity ? DP_FRAMER_SP_HSP : 0; val |= video->v_sync_polarity ? DP_FRAMER_SP_VSP : 0; - ret = cdn_dp_reg_write(dp, DP_FRAMER_SP, val); + ret = cdns_mhdp_reg_write(mhdp, DP_FRAMER_SP, val); if (ret) goto err_config_video;

val = (mode->hsync_start - mode->hdisplay) << 16; val |= mode->htotal - mode->hsync_end; - ret = cdn_dp_reg_write(dp, DP_FRONT_BACK_PORCH, val); + ret = cdns_mhdp_reg_write(mhdp, DP_FRONT_BACK_PORCH, val); if (ret) goto err_config_video;

val = mode->hdisplay * bit_per_pix / 8; - ret = cdn_dp_reg_write(dp, DP_BYTE_COUNT, val); + ret = cdns_mhdp_reg_write(mhdp, DP_BYTE_COUNT, val); if (ret) goto err_config_video;

val = mode->htotal | ((mode->htotal - mode->hsync_start) << 16); - ret = cdn_dp_reg_write(dp, MSA_HORIZONTAL_0, val); + ret = cdns_mhdp_reg_write(mhdp, MSA_HORIZONTAL_0, val); if (ret) goto err_config_video;

val = mode->hsync_end - mode->hsync_start; val |= (mode->hdisplay << 16) | (video->h_sync_polarity << 15); - ret = cdn_dp_reg_write(dp, MSA_HORIZONTAL_1, val); + ret = cdns_mhdp_reg_write(mhdp, MSA_HORIZONTAL_1, val); if (ret) goto err_config_video;

val = mode->vtotal; val |= (mode->vtotal - mode->vsync_start) << 16; - ret = cdn_dp_reg_write(dp, MSA_VERTICAL_0, val); + ret = cdns_mhdp_reg_write(mhdp, MSA_VERTICAL_0, val); if (ret) goto err_config_video;

val = mode->vsync_end - mode->vsync_start; val |= (mode->vdisplay << 16) | (video->v_sync_polarity << 15); - ret = cdn_dp_reg_write(dp, MSA_VERTICAL_1, val); + ret = cdns_mhdp_reg_write(mhdp, MSA_VERTICAL_1, val); if (ret) goto err_config_video;

- val = cdn_dp_get_msa_misc(video, mode); - ret = cdn_dp_reg_write(dp, MSA_MISC, val); + val = cdns_mhdp_get_msa_misc(video, mode); + ret = cdns_mhdp_reg_write(mhdp, MSA_MISC, val); if (ret) goto err_config_video;

- ret = cdn_dp_reg_write(dp, STREAM_CONFIG, 1); + ret = cdns_mhdp_reg_write(mhdp, STREAM_CONFIG, 1); if (ret) goto err_config_video;

val = mode->hsync_end - mode->hsync_start; val |= mode->hdisplay << 16; - ret = cdn_dp_reg_write(dp, DP_HORIZONTAL, val); + ret = cdns_mhdp_reg_write(mhdp, DP_HORIZONTAL, val); if (ret) goto err_config_video;

val = mode->vdisplay; val |= (mode->vtotal - mode->vsync_start) << 16; - ret = cdn_dp_reg_write(dp, DP_VERTICAL_0, val); + ret = cdns_mhdp_reg_write(mhdp, DP_VERTICAL_0, val); if (ret) goto err_config_video;

val = mode->vtotal; - ret = cdn_dp_reg_write(dp, DP_VERTICAL_1, val); + ret = cdns_mhdp_reg_write(mhdp, DP_VERTICAL_1, val); if (ret) goto err_config_video;

- ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 2, 1, 0); + ret = cdns_mhdp_reg_write_bit(mhdp, DP_VB_ID, 2, 1, 0);

err_config_video: if (ret) - DRM_DEV_ERROR(dp->dev, "config video failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "config video failed: %d\n", ret); return ret; }

-int cdn_dp_audio_stop(struct cdn_dp_device *dp, struct audio_info *audio) +int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp, + struct audio_info *audio) { int ret;

- ret = cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, 0); + ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, 0); if (ret) { - DRM_DEV_ERROR(dp->dev, "audio stop failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "audio stop failed: %d\n", ret); return ret; }

- writel(0, dp->regs + SPDIF_CTRL_ADDR); + writel(0, mhdp->regs + SPDIF_CTRL_ADDR);

/* clearn the audio config and reset */ - writel(0, dp->regs + AUDIO_SRC_CNTL); - writel(0, dp->regs + AUDIO_SRC_CNFG); - writel(AUDIO_SW_RST, dp->regs + AUDIO_SRC_CNTL); - writel(0, dp->regs + AUDIO_SRC_CNTL); + writel(0, mhdp->regs + AUDIO_SRC_CNTL); + writel(0, mhdp->regs + AUDIO_SRC_CNFG); + writel(AUDIO_SW_RST, mhdp->regs + AUDIO_SRC_CNTL); + writel(0, mhdp->regs + AUDIO_SRC_CNTL);

/* reset smpl2pckt component */ - writel(0, dp->regs + SMPL2PKT_CNTL); - writel(AUDIO_SW_RST, dp->regs + SMPL2PKT_CNTL); - writel(0, dp->regs + SMPL2PKT_CNTL); + writel(0, mhdp->regs + SMPL2PKT_CNTL); + writel(AUDIO_SW_RST, mhdp->regs + SMPL2PKT_CNTL); + writel(0, mhdp->regs + SMPL2PKT_CNTL);

/* reset FIFO */ - writel(AUDIO_SW_RST, dp->regs + FIFO_CNTL); - writel(0, dp->regs + FIFO_CNTL); + writel(AUDIO_SW_RST, mhdp->regs + FIFO_CNTL); + writel(0, mhdp->regs + FIFO_CNTL);

if (audio->format == AFMT_SPDIF) - clk_disable_unprepare(dp->spdif_clk); + clk_disable_unprepare(mhdp->spdif_clk);

return 0; }

-int cdn_dp_audio_mute(struct cdn_dp_device *dp, bool enable) +int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable) { int ret;

- ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 4, 1, enable); + ret = cdns_mhdp_reg_write_bit(mhdp, DP_VB_ID, 4, 1, enable); if (ret) - DRM_DEV_ERROR(dp->dev, "audio mute failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "audio mute failed: %d\n", ret);

return ret; }

-static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp, - struct audio_info *audio) +static void cdns_mhdp_audio_config_i2s(struct cdns_mhdp_device *mhdp, + struct audio_info *audio) { int sub_pckt_num = 1, i2s_port_en_val = 0xf, i; u32 val;

if (audio->channels == 2) { - if (dp->link.num_lanes == 1) + if (mhdp->link.num_lanes == 1) sub_pckt_num = 2; else sub_pckt_num = 4; @@ -851,15 +862,15 @@ static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp, i2s_port_en_val = 3; }

- writel(0x0, dp->regs + SPDIF_CTRL_ADDR); + writel(0x0, mhdp->regs + SPDIF_CTRL_ADDR);

- writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL); + writel(SYNC_WR_TO_CH_ZERO, mhdp->regs + FIFO_CNTL);

val = MAX_NUM_CH(audio->channels); val |= NUM_OF_I2S_PORTS(audio->channels); val |= AUDIO_TYPE_LPCM; val |= CFG_SUB_PCKT_NUM(sub_pckt_num); - writel(val, dp->regs + SMPL2PKT_CNFG); + writel(val, mhdp->regs + SMPL2PKT_CNFG);

if (audio->sample_width == 16) val = 0; @@ -871,7 +882,7 @@ static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp, val |= AUDIO_CH_NUM(audio->channels); val |= I2S_DEC_PORT_EN(i2s_port_en_val); val |= TRANS_SMPL_WIDTH_32; - writel(val, dp->regs + AUDIO_SRC_CNFG); + writel(val, mhdp->regs + AUDIO_SRC_CNFG);

for (i = 0; i < (audio->channels + 1) / 2; i++) { if (audio->sample_width == 16) @@ -880,7 +891,7 @@ static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp, val = (0x0b << 8) | (0x0b << 20);

val |= ((2 * i) << 4) | ((2 * i + 1) << 16); - writel(val, dp->regs + STTS_BIT_CH(i)); + writel(val, mhdp->regs + STTS_BIT_CH(i)); }

switch (audio->sample_rate) { @@ -914,56 +925,57 @@ static void cdn_dp_audio_config_i2s(struct cdn_dp_device *dp, break; } val |= 4; - writel(val, dp->regs + COM_CH_STTS_BITS); + writel(val, mhdp->regs + COM_CH_STTS_BITS);

- writel(SMPL2PKT_EN, dp->regs + SMPL2PKT_CNTL); - writel(I2S_DEC_START, dp->regs + AUDIO_SRC_CNTL); + writel(SMPL2PKT_EN, mhdp->regs + SMPL2PKT_CNTL); + writel(I2S_DEC_START, mhdp->regs + AUDIO_SRC_CNTL); }

-static void cdn_dp_audio_config_spdif(struct cdn_dp_device *dp) +static void cdns_mhdp_audio_config_spdif(struct cdns_mhdp_device *mhdp) { u32 val;

- writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL); + writel(SYNC_WR_TO_CH_ZERO, mhdp->regs + FIFO_CNTL);

val = MAX_NUM_CH(2) | AUDIO_TYPE_LPCM | CFG_SUB_PCKT_NUM(4); - writel(val, dp->regs + SMPL2PKT_CNFG); - writel(SMPL2PKT_EN, dp->regs + SMPL2PKT_CNTL); + writel(val, mhdp->regs + SMPL2PKT_CNFG); + writel(SMPL2PKT_EN, mhdp->regs + SMPL2PKT_CNTL);

val = SPDIF_ENABLE | SPDIF_AVG_SEL | SPDIF_JITTER_BYPASS; - writel(val, dp->regs + SPDIF_CTRL_ADDR); + writel(val, mhdp->regs + SPDIF_CTRL_ADDR);

- clk_prepare_enable(dp->spdif_clk); - clk_set_rate(dp->spdif_clk, CDN_DP_SPDIF_CLK); + clk_prepare_enable(mhdp->spdif_clk); + clk_set_rate(mhdp->spdif_clk, CDNS_DP_SPDIF_CLK); }

-int cdn_dp_audio_config(struct cdn_dp_device *dp, struct audio_info *audio) +int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp, + struct audio_info *audio) { int ret;

/* reset the spdif clk before config */ if (audio->format == AFMT_SPDIF) { - reset_control_assert(dp->spdif_rst); - reset_control_deassert(dp->spdif_rst); + reset_control_assert(mhdp->spdif_rst); + reset_control_deassert(mhdp->spdif_rst); }

- ret = cdn_dp_reg_write(dp, CM_LANE_CTRL, LANE_REF_CYC); + ret = cdns_mhdp_reg_write(mhdp, CM_LANE_CTRL, LANE_REF_CYC); if (ret) goto err_audio_config;

- ret = cdn_dp_reg_write(dp, CM_CTRL, 0); + ret = cdns_mhdp_reg_write(mhdp, CM_CTRL, 0); if (ret) goto err_audio_config;

if (audio->format == AFMT_I2S) - cdn_dp_audio_config_i2s(dp, audio); + cdns_mhdp_audio_config_i2s(mhdp, audio); else if (audio->format == AFMT_SPDIF) - cdn_dp_audio_config_spdif(dp); + cdns_mhdp_audio_config_spdif(mhdp);

- ret = cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN); + ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN);

err_audio_config: if (ret) - DRM_DEV_ERROR(dp->dev, "audio config failed: %d\n", ret); + DRM_DEV_ERROR(mhdp->dev, "audio config failed: %d\n", ret); return ret; } diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.h b/drivers/gpu/drm/bridge/cdns-mhdp-common.h similarity index 83% rename from drivers/gpu/drm/rockchip/cdn-dp-reg.h rename to drivers/gpu/drm/bridge/cdns-mhdp-common.h index c4bbb4a83319..b0101f10594a 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-reg.h +++ b/drivers/gpu/drm/bridge/cdns-mhdp-common.h @@ -12,10 +12,13 @@ * GNU General Public License for more details. */

-#ifndef _CDN_DP_REG_H -#define _CDN_DP_REG_H +#ifndef CDNS_MHDP_COMMON_H_ +#define CDNS_MHDP_COMMON_H_

#include <linux/bitops.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_connector.h> +#include <drm/drm_bridge.h>

#define ADDR_IMEM 0x10000 #define ADDR_DMEM 0x20000 @@ -395,7 +398,7 @@ #define HDCP_TX_IS_RECEIVER_ID_VALID_EVENT BIT(7)

#define TU_SIZE 30 -#define CDN_DP_MAX_LINK_RATE DP_LINK_BW_5_4 +#define CDNS_DP_MAX_LINK_RATE DP_LINK_BW_5_4

/* audio */ #define AUDIO_PACK_EN BIT(8) @@ -459,24 +462,96 @@ enum vic_bt_type { BT_709 = 0x1, };

-void cdn_dp_clock_reset(struct cdn_dp_device *dp); - -void cdn_dp_set_fw_clk(struct cdn_dp_device *dp, unsigned long clk); -int cdn_dp_load_firmware(struct cdn_dp_device *dp, const u32 *i_mem, - u32 i_size, const u32 *d_mem, u32 d_size); -int cdn_dp_set_firmware_active(struct cdn_dp_device *dp, bool enable); -int cdn_dp_set_host_cap(struct cdn_dp_device *dp, u8 lanes, bool flip); -int cdn_dp_event_config(struct cdn_dp_device *dp); -u32 cdn_dp_get_event(struct cdn_dp_device *dp); -int cdn_dp_get_hpd_status(struct cdn_dp_device *dp); -int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value); -int cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len); -int cdn_dp_get_edid_block(void *dp, u8 *edid, - unsigned int block, size_t length); -int cdn_dp_train_link(struct cdn_dp_device *dp); -int cdn_dp_set_video_status(struct cdn_dp_device *dp, int active); -int cdn_dp_config_video(struct cdn_dp_device *dp); -int cdn_dp_audio_stop(struct cdn_dp_device *dp, struct audio_info *audio); -int cdn_dp_audio_mute(struct cdn_dp_device *dp, bool enable); -int cdn_dp_audio_config(struct cdn_dp_device *dp, struct audio_info *audio); -#endif /* _CDN_DP_REG_H */ +enum audio_format { + AFMT_I2S = 0, + AFMT_SPDIF = 1, + AFMT_UNUSED, +}; + +struct audio_info { + enum audio_format format; + int sample_rate; + int channels; + int sample_width; +}; + +enum vic_pxl_encoding_format { + PXL_RGB = 0x1, + YCBCR_4_4_4 = 0x2, + YCBCR_4_2_2 = 0x4, + YCBCR_4_2_0 = 0x8, + Y_ONLY = 0x10, +}; + +struct video_info { + bool h_sync_polarity; + bool v_sync_polarity; + bool interlaced; + int color_depth; + enum vic_pxl_encoding_format color_fmt; +}; + +struct cdns_mhdp_host { + unsigned int link_rate; + u8 lanes_cnt; + u8 volt_swing; + u8 pre_emphasis; + u8 pattern_supp; + u8 fast_link; + u8 lane_mapping; + u8 enhanced; +}; + +struct cdns_mhdp_sink { + unsigned int link_rate; + u8 lanes_cnt; + u8 pattern_supp; + u8 fast_link; + u8 enhanced; +}; + +struct cdns_mhdp_device { + void __iomem *regs; + + struct device *dev; + + struct drm_dp_link link; + struct drm_connector connector; + struct clk *spdif_clk; + struct reset_control *spdif_rst; + + struct drm_dp_aux aux; + struct cdns_mhdp_host host; + struct cdns_mhdp_sink sink; + struct drm_bridge bridge; + struct phy *phy; + void __iomem *dbg_regs; + + struct video_info video_info; + struct drm_display_mode mode; + unsigned int fw_version; +}; + +void cdns_mhdp_clock_reset(struct cdns_mhdp_device *mhdp); +void cdns_mhdp_set_fw_clk(struct cdns_mhdp_device *mhdp, unsigned long clk); +int cdns_mhdp_load_firmware(struct cdns_mhdp_device *mhdp, const u32 *i_mem, + u32 i_size, const u32 *d_mem, u32 d_size); +int cdns_mhdp_set_firmware_active(struct cdns_mhdp_device *mhdp, bool enable); +int cdns_mhdp_set_host_cap(struct cdns_mhdp_device *mhdp, u8 lanes, bool flip); +int cdns_mhdp_event_config(struct cdns_mhdp_device *mhdp); +u32 cdns_mhdp_get_event(struct cdns_mhdp_device *mhdp); +int cdns_mhdp_get_hpd_status(struct cdns_mhdp_device *mhdp); +int cdns_mhdp_dpcd_write(struct cdns_mhdp_device *mhdp, u32 addr, u8 value); +int cdns_mhdp_dpcd_read(struct cdns_mhdp_device *mhdp, + u32 addr, u8 *data, u16 len); +int cdns_mhdp_get_edid_block(void *mhdp, u8 *edid, + unsigned int block, size_t length); +int cdns_mhdp_train_link(struct cdns_mhdp_device *mhdp); +int cdns_mhdp_set_video_status(struct cdns_mhdp_device *mhdp, int active); +int cdns_mhdp_config_video(struct cdns_mhdp_device *mhdp); +int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp, + struct audio_info *audio); +int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable); +int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp, + struct audio_info *audio); +#endif /* CDNS_MHDP_COMMON_H_ */ diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig index 0ccc76217ee4..8269dbc0d385 100644 --- a/drivers/gpu/drm/rockchip/Kconfig +++ b/drivers/gpu/drm/rockchip/Kconfig @@ -28,6 +28,7 @@ config ROCKCHIP_ANALOGIX_DP config ROCKCHIP_CDN_DP bool "Rockchip cdn DP" depends on EXTCON=y || (EXTCON=m && DRM_ROCKCHIP=m) + select DRM_CDNS_MHDP help This selects support for Rockchip SoC specific extensions for the cdn DP driver. If you want to enable Dp on diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile index a314e2109e76..c70b1bb6829f 100644 --- a/drivers/gpu/drm/rockchip/Makefile +++ b/drivers/gpu/drm/rockchip/Makefile @@ -3,13 +3,15 @@ # Makefile for the drm device driver. This driver provides support for the # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.

+EXTRA_CFLAGS += -I$(src)/../bridge + rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \ rockchip_drm_gem.o rockchip_drm_psr.o \ rockchip_drm_vop.o rockchip_vop_reg.o rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o

rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o -rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o +rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c index 8ad0d773dc33..bf7e206326f0 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-core.c +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c @@ -31,11 +31,10 @@ #include <sound/hdmi-codec.h>

#include "cdn-dp-core.h" -#include "cdn-dp-reg.h" #include "rockchip_drm_vop.h"

#define connector_to_dp(c) \ - container_of(c, struct cdn_dp_device, connector) + container_of(c, struct cdn_dp_device, mhdp.connector)

#define encoder_to_dp(c) \ container_of(c, struct cdn_dp_device, encoder) @@ -70,17 +69,18 @@ MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids); static int cdn_dp_grf_write(struct cdn_dp_device *dp, unsigned int reg, unsigned int val) { + struct device *dev = dp->mhdp.dev; int ret;

ret = clk_prepare_enable(dp->grf_clk); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n"); + DRM_DEV_ERROR(dev, "Failed to prepare_enable grf clock\n"); return ret; }

ret = regmap_write(dp->grf, reg, val); if (ret) { - DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret); + DRM_DEV_ERROR(dev, "Could not write to GRF: %d\n", ret); return ret; }

@@ -91,24 +91,25 @@ static int cdn_dp_grf_write(struct cdn_dp_device *dp,

static int cdn_dp_clk_enable(struct cdn_dp_device *dp) { + struct device *dev = dp->mhdp.dev; int ret; unsigned long rate;

ret = clk_prepare_enable(dp->pclk); if (ret < 0) { - DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret); + DRM_DEV_ERROR(dev, "cannot enable dp pclk %d\n", ret); goto err_pclk; }

ret = clk_prepare_enable(dp->core_clk); if (ret < 0) { - DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret); + DRM_DEV_ERROR(dev, "cannot enable core_clk %d\n", ret); goto err_core_clk; }

- ret = pm_runtime_get_sync(dp->dev); + ret = pm_runtime_get_sync(dev); if (ret < 0) { - DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret); + DRM_DEV_ERROR(dev, "cannot get pm runtime %d\n", ret); goto err_pm_runtime_get; }

@@ -121,18 +122,18 @@ static int cdn_dp_clk_enable(struct cdn_dp_device *dp)

rate = clk_get_rate(dp->core_clk); if (!rate) { - DRM_DEV_ERROR(dp->dev, "get clk rate failed\n"); + DRM_DEV_ERROR(dev, "get clk rate failed\n"); ret = -EINVAL; goto err_set_rate; }

- cdn_dp_set_fw_clk(dp, rate); - cdn_dp_clock_reset(dp); + cdns_mhdp_set_fw_clk(&dp->mhdp, rate); + cdns_mhdp_clock_reset(&dp->mhdp);

return 0;

err_set_rate: - pm_runtime_put(dp->dev); + pm_runtime_put(dev); err_pm_runtime_get: clk_disable_unprepare(dp->core_clk); err_core_clk: @@ -143,7 +144,7 @@ static int cdn_dp_clk_enable(struct cdn_dp_device *dp)

static void cdn_dp_clk_disable(struct cdn_dp_device *dp) { - pm_runtime_put_sync(dp->dev); + pm_runtime_put_sync(dp->mhdp.dev); clk_disable_unprepare(dp->pclk); clk_disable_unprepare(dp->core_clk); } @@ -176,7 +177,7 @@ static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count) u8 value;

*sink_count = 0; - ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1); + ret = cdns_mhdp_dpcd_read(&dp->mhdp, DP_SINK_COUNT, &value, 1); if (ret) return ret;

@@ -200,12 +201,13 @@ static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)

static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) { + struct device *dev = dp->mhdp.dev; unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS); struct cdn_dp_port *port; u8 sink_count = 0;

if (dp->active_port < 0 || dp->active_port >= dp->ports) { - DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n"); + DRM_DEV_ERROR(dev, "active_port is wrong!\n"); return false; }

@@ -227,7 +229,7 @@ static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) usleep_range(5000, 10000); }

- DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n"); + DRM_DEV_ERROR(dev, "Get sink capability timed out\n"); return false; }

@@ -269,7 +271,8 @@ static int cdn_dp_connector_get_modes(struct drm_connector *connector) mutex_lock(&dp->lock); edid = dp->edid; if (edid) { - DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", + DRM_DEV_DEBUG_KMS(dp->mhdp.dev, + "got edid: width[%d] x height[%d]\n", edid->width_cm, edid->height_cm);

dp->sink_has_audio = drm_detect_monitor_audio(edid); @@ -287,7 +290,8 @@ static int cdn_dp_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct cdn_dp_device *dp = connector_to_dp(connector); - struct drm_display_info *display_info = &dp->connector.display_info; + struct drm_display_info *display_info = + &dp->mhdp.connector.display_info; u32 requested, actual, rate, sink_max, source_max = 0; u8 lanes, bpc;

@@ -313,7 +317,7 @@ static int cdn_dp_connector_mode_valid(struct drm_connector *connector, sink_max = drm_dp_max_lane_count(dp->dpcd); lanes = min(source_max, sink_max);

- source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE); + source_max = drm_dp_bw_code_to_link_rate(CDNS_DP_MAX_LINK_RATE); sink_max = drm_dp_max_link_rate(dp->dpcd); rate = min(source_max, sink_max);

@@ -323,7 +327,7 @@ static int cdn_dp_connector_mode_valid(struct drm_connector *connector, actual = actual * 8 / 10;

if (requested > actual) { - DRM_DEV_DEBUG_KMS(dp->dev, + DRM_DEV_DEBUG_KMS(dp->mhdp.dev, "requested=%d, actual=%d, clock=%d\n", requested, actual, mode->clock); return MODE_CLOCK_HIGH; @@ -343,28 +347,29 @@ static int cdn_dp_firmware_init(struct cdn_dp_device *dp) const u32 *iram_data, *dram_data; const struct firmware *fw = dp->fw; const struct cdn_firmware_header *hdr; + struct device *dev = dp->mhdp.dev;

hdr = (struct cdn_firmware_header *)fw->data; if (fw->size != le32_to_cpu(hdr->size_bytes)) { - DRM_DEV_ERROR(dp->dev, "firmware is invalid\n"); + DRM_DEV_ERROR(dev, "firmware is invalid\n"); return -EINVAL; }

iram_data = (const u32 *)(fw->data + hdr->header_size); dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);

- ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size, - dram_data, hdr->dram_size); + ret = cdns_mhdp_load_firmware(&dp->mhdp, iram_data, hdr->iram_size, + dram_data, hdr->dram_size); if (ret) return ret;

- ret = cdn_dp_set_firmware_active(dp, true); + ret = cdns_mhdp_set_firmware_active(&dp->mhdp, true); if (ret) { - DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret); + DRM_DEV_ERROR(dev, "active ucpu failed: %d\n", ret); return ret; }

- return cdn_dp_event_config(dp); + return cdns_mhdp_event_config(&dp->mhdp); }

static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) @@ -374,28 +379,29 @@ static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) if (!cdn_dp_check_sink_connection(dp)) return -ENODEV;

- ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd, - DP_RECEIVER_CAP_SIZE); + ret = cdns_mhdp_dpcd_read(&dp->mhdp, DP_DPCD_REV, dp->dpcd, + DP_RECEIVER_CAP_SIZE); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret); + DRM_DEV_ERROR(dp->mhdp.dev, "Failed to get caps %d\n", ret); return ret; }

kfree(dp->edid); - dp->edid = drm_do_get_edid(&dp->connector, - cdn_dp_get_edid_block, dp); + dp->edid = drm_do_get_edid(&dp->mhdp.connector, + cdns_mhdp_get_edid_block, &dp->mhdp); return 0; }

static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) { + struct device *dev = dp->mhdp.dev; union extcon_property_value property; int ret;

if (!port->phy_enabled) { ret = phy_power_on(port->phy); if (ret) { - DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n", + DRM_DEV_ERROR(dev, "phy power on failed: %d\n", ret); goto err_phy; } @@ -405,28 +411,28 @@ static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, DPTX_HPD_SEL_MASK | DPTX_HPD_SEL); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret); + DRM_DEV_ERROR(dev, "Failed to write HPD_SEL %d\n", ret); goto err_power_on; }

- ret = cdn_dp_get_hpd_status(dp); + ret = cdns_mhdp_get_hpd_status(&dp->mhdp); if (ret <= 0) { if (!ret) - DRM_DEV_ERROR(dp->dev, "hpd does not exist\n"); + DRM_DEV_ERROR(dev, "hpd does not exist\n"); goto err_power_on; }

ret = extcon_get_property(port->extcon, EXTCON_DISP_DP, EXTCON_PROP_USB_TYPEC_POLARITY, &property); if (ret) { - DRM_DEV_ERROR(dp->dev, "get property failed\n"); + DRM_DEV_ERROR(dev, "get property failed\n"); goto err_power_on; }

port->lanes = cdn_dp_get_port_lanes(port); - ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval); + ret = cdns_mhdp_set_host_cap(&dp->mhdp, port->lanes, property.intval); if (ret) { - DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n", + DRM_DEV_ERROR(dev, "set host capabilities failed: %d\n", ret); goto err_power_on; } @@ -436,7 +442,7 @@ static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)

err_power_on: if (phy_power_off(port->phy)) - DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); + DRM_DEV_ERROR(dev, "phy power off failed: %d", ret); else port->phy_enabled = false;

@@ -454,7 +460,8 @@ static int cdn_dp_disable_phy(struct cdn_dp_device *dp, if (port->phy_enabled) { ret = phy_power_off(port->phy); if (ret) { - DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); + DRM_DEV_ERROR(dp->mhdp.dev, + "phy power off failed: %d", ret); return ret; } } @@ -478,16 +485,16 @@ static int cdn_dp_disable(struct cdn_dp_device *dp) ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n", + DRM_DEV_ERROR(dp->mhdp.dev, "Failed to clear hpd sel %d\n", ret); return ret; }

- cdn_dp_set_firmware_active(dp, false); + cdns_mhdp_set_firmware_active(&dp->mhdp, false); cdn_dp_clk_disable(dp); dp->active = false; - dp->link.rate = 0; - dp->link.num_lanes = 0; + dp->mhdp.link.rate = 0; + dp->mhdp.link.num_lanes = 0; if (!dp->connected) { kfree(dp->edid); dp->edid = NULL; @@ -500,11 +507,11 @@ static int cdn_dp_enable(struct cdn_dp_device *dp) { int ret, i, lanes; struct cdn_dp_port *port; + struct device *dev = dp->mhdp.dev;

port = cdn_dp_connected_port(dp); if (!port) { - DRM_DEV_ERROR(dp->dev, - "Can't enable without connection\n"); + DRM_DEV_ERROR(dev, "Can't enable without connection\n"); return -ENODEV; }

@@ -517,7 +524,7 @@ static int cdn_dp_enable(struct cdn_dp_device *dp)

ret = cdn_dp_firmware_init(dp); if (ret) { - DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret); + DRM_DEV_ERROR(dp->mhdp.dev, "firmware init failed: %d", ret); goto err_clk_disable; }

@@ -551,8 +558,9 @@ static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder, struct drm_display_mode *adjusted) { struct cdn_dp_device *dp = encoder_to_dp(encoder); - struct drm_display_info *display_info = &dp->connector.display_info; - struct video_info *video = &dp->video_info; + struct drm_display_info *display_info = + &dp->mhdp.connector.display_info; + struct video_info *video = &dp->mhdp.video_info;

switch (display_info->bpc) { case 10: @@ -570,7 +578,7 @@ static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder, video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC); video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);

- memcpy(&dp->mode, adjusted, sizeof(*mode)); + memcpy(&dp->mhdp.mode, adjusted, sizeof(*mode)); }

static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) @@ -579,11 +587,11 @@ static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) struct cdn_dp_port *port = cdn_dp_connected_port(dp); u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);

- if (!port || !dp->link.rate || !dp->link.num_lanes) + if (!port || !dp->mhdp.link.rate || !dp->mhdp.link.num_lanes) return false;

- if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status, - DP_LINK_STATUS_SIZE)) { + if (cdns_mhdp_dpcd_read(&dp->mhdp, DP_LANE0_1_STATUS, link_status, + DP_LINK_STATUS_SIZE)) { DRM_ERROR("Failed to get link status\n"); return false; } @@ -595,15 +603,16 @@ static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) static void cdn_dp_encoder_enable(struct drm_encoder *encoder) { struct cdn_dp_device *dp = encoder_to_dp(encoder); + struct device *dev = dp->mhdp.dev; int ret, val;

- ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); + ret = drm_of_encoder_active_endpoint_id(dev->of_node, encoder); if (ret < 0) { - DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret); + DRM_DEV_ERROR(dev, "Could not get vop id, %d", ret); return; }

- DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n", + DRM_DEV_DEBUG_KMS(dev, "vop %s output to cdn-dp\n", (ret) ? "LIT" : "BIG"); if (ret) val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); @@ -618,33 +627,33 @@ static void cdn_dp_encoder_enable(struct drm_encoder *encoder)

ret = cdn_dp_enable(dp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n", + DRM_DEV_ERROR(dev, "Failed to enable encoder %d\n", ret); goto out; } if (!cdn_dp_check_link_status(dp)) { - ret = cdn_dp_train_link(dp); + ret = cdns_mhdp_train_link(&dp->mhdp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret); + DRM_DEV_ERROR(dev, "Failed link train %d\n", ret); goto out; } }

- ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE); + ret = cdns_mhdp_set_video_status(&dp->mhdp, CONTROL_VIDEO_IDLE); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret); + DRM_DEV_ERROR(dev, "Failed to idle video %d\n", ret); goto out; }

- ret = cdn_dp_config_video(dp); + ret = cdns_mhdp_config_video(&dp->mhdp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret); + DRM_DEV_ERROR(dev, "Failed to config video %d\n", ret); goto out; }

- ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID); + ret = cdns_mhdp_set_video_status(&dp->mhdp, CONTROL_VIDEO_VALID); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret); + DRM_DEV_ERROR(dev, "Failed to valid video %d\n", ret); goto out; } out: @@ -660,7 +669,8 @@ static void cdn_dp_encoder_disable(struct drm_encoder *encoder) if (dp->active) { ret = cdn_dp_disable(dp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n", + DRM_DEV_ERROR(dp->mhdp.dev, + "Failed to disable encoder %d\n", ret); } } @@ -704,7 +714,7 @@ static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {

static int cdn_dp_parse_dt(struct cdn_dp_device *dp) { - struct device *dev = dp->dev; + struct device *dev = dp->mhdp.dev; struct device_node *np = dev->of_node; struct platform_device *pdev = to_platform_device(dev); struct resource *res; @@ -716,10 +726,10 @@ static int cdn_dp_parse_dt(struct cdn_dp_device *dp) }

res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - dp->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(dp->regs)) { + dp->mhdp.regs = devm_ioremap_resource(dev, res); + if (IS_ERR(dp->mhdp.regs)) { DRM_DEV_ERROR(dev, "ioremap reg failed\n"); - return PTR_ERR(dp->regs); + return PTR_ERR(dp->mhdp.regs); }

dp->core_clk = devm_clk_get(dev, "core-clk"); @@ -734,10 +744,10 @@ static int cdn_dp_parse_dt(struct cdn_dp_device *dp) return PTR_ERR(dp->pclk); }

- dp->spdif_clk = devm_clk_get(dev, "spdif"); - if (IS_ERR(dp->spdif_clk)) { + dp->mhdp.spdif_clk = devm_clk_get(dev, "spdif"); + if (IS_ERR(dp->mhdp.spdif_clk)) { DRM_DEV_ERROR(dev, "cannot get spdif_clk\n"); - return PTR_ERR(dp->spdif_clk); + return PTR_ERR(dp->mhdp.spdif_clk); }

dp->grf_clk = devm_clk_get(dev, "grf"); @@ -746,10 +756,10 @@ static int cdn_dp_parse_dt(struct cdn_dp_device *dp) return PTR_ERR(dp->grf_clk); }

- dp->spdif_rst = devm_reset_control_get(dev, "spdif"); - if (IS_ERR(dp->spdif_rst)) { + dp->mhdp.spdif_rst = devm_reset_control_get(dev, "spdif"); + if (IS_ERR(dp->mhdp.spdif_rst)) { DRM_DEV_ERROR(dev, "no spdif reset control found\n"); - return PTR_ERR(dp->spdif_rst); + return PTR_ERR(dp->mhdp.spdif_rst); }

dp->dptx_rst = devm_reset_control_get(dev, "dptx"); @@ -804,7 +814,7 @@ static int cdn_dp_audio_hw_params(struct device *dev, void *data, goto out; }

- ret = cdn_dp_audio_config(dp, &audio); + ret = cdns_mhdp_audio_config(&dp->mhdp, &audio); if (!ret) dp->audio_info = audio;

@@ -822,7 +832,7 @@ static void cdn_dp_audio_shutdown(struct device *dev, void *data) if (!dp->active) goto out;

- ret = cdn_dp_audio_stop(dp, &dp->audio_info); + ret = cdns_mhdp_audio_stop(&dp->mhdp, &dp->audio_info); if (!ret) dp->audio_info.format = AFMT_UNUSED; out: @@ -841,7 +851,7 @@ static int cdn_dp_audio_digital_mute(struct device *dev, void *data, goto out; }

- ret = cdn_dp_audio_mute(dp, enable); + ret = cdns_mhdp_audio_mute(&dp->mhdp, enable);

out: mutex_unlock(&dp->lock); @@ -853,7 +863,8 @@ static int cdn_dp_audio_get_eld(struct device *dev, void *data, { struct cdn_dp_device *dp = dev_get_drvdata(dev);

- memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len)); + memcpy(buf, dp->mhdp.connector.eld, + min(sizeof(dp->mhdp.connector.eld), len));

return 0; } @@ -887,6 +898,7 @@ static int cdn_dp_request_firmware(struct cdn_dp_device *dp) int ret; unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS); unsigned long sleep = 1000; + struct device *dev = dp->mhdp.dev;

WARN_ON(!mutex_is_locked(&dp->lock));

@@ -897,13 +909,13 @@ static int cdn_dp_request_firmware(struct cdn_dp_device *dp) mutex_unlock(&dp->lock);

while (time_before(jiffies, timeout)) { - ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev); + ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dev); if (ret == -ENOENT) { msleep(sleep); sleep *= 2; continue; } else if (ret) { - DRM_DEV_ERROR(dp->dev, + DRM_DEV_ERROR(dev, "failed to request firmware: %d\n", ret); goto out; } @@ -913,7 +925,7 @@ static int cdn_dp_request_firmware(struct cdn_dp_device *dp) goto out; }

- DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n"); + DRM_DEV_ERROR(dev, "Timed out trying to load firmware\n"); ret = -ETIMEDOUT; out: mutex_lock(&dp->lock); @@ -924,8 +936,9 @@ static void cdn_dp_pd_event_work(struct work_struct *work) { struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device, event_work); - struct drm_connector *connector = &dp->connector; + struct drm_connector *connector = &dp->mhdp.connector; enum drm_connector_status old_status; + struct device *dev = dp->mhdp.dev;

int ret;

@@ -942,44 +955,45 @@ static void cdn_dp_pd_event_work(struct work_struct *work)

/* Not connected, notify userspace to disable the block */ if (!cdn_dp_connected_port(dp)) { - DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n"); + DRM_DEV_INFO(dev, "Not connected. Disabling cdn\n"); dp->connected = false;

/* Connected but not enabled, enable the block */ } else if (!dp->active) { - DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n"); + DRM_DEV_INFO(dev, "Connected, not enabled. Enabling cdn\n"); ret = cdn_dp_enable(dp); if (ret) { - DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret); + DRM_DEV_ERROR(dev, "Enable dp failed %d\n", ret); dp->connected = false; }

/* Enabled and connected to a dongle without a sink, notify userspace */ } else if (!cdn_dp_check_sink_connection(dp)) { - DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n"); + DRM_DEV_INFO(dev, "Connected without sink. Assert hpd\n"); dp->connected = false;

/* Enabled and connected with a sink, re-train if requested */ } else if (!cdn_dp_check_link_status(dp)) { - unsigned int rate = dp->link.rate; - unsigned int lanes = dp->link.num_lanes; - struct drm_display_mode *mode = &dp->mode; + unsigned int rate = dp->mhdp.link.rate; + unsigned int lanes = dp->mhdp.link.num_lanes; + struct drm_display_mode *mode = &dp->mhdp.mode;

- DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n"); - ret = cdn_dp_train_link(dp); + DRM_DEV_INFO(dev, "Connected with sink. Re-train link\n"); + ret = cdns_mhdp_train_link(&dp->mhdp); if (ret) { dp->connected = false; - DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret); + DRM_DEV_ERROR(dev, "Train link failed %d\n", ret); goto out; }

/* If training result is changed, update the video config */ if (mode->clock && - (rate != dp->link.rate || lanes != dp->link.num_lanes)) { - ret = cdn_dp_config_video(dp); + (rate != dp->mhdp.link.rate || + lanes != dp->mhdp.link.num_lanes)) { + ret = cdns_mhdp_config_video(&dp->mhdp); if (ret) { dp->connected = false; - DRM_DEV_ERROR(dp->dev, + DRM_DEV_ERROR(dev, "Failed to config video %d\n", ret); } @@ -1048,7 +1062,7 @@ static int cdn_dp_bind(struct device *dev, struct device *master, void *data)

drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);

- connector = &dp->connector; + connector = &dp->mhdp.connector; connector->polled = DRM_CONNECTOR_POLL_HPD; connector->dpms = DRM_MODE_DPMS_OFF;

@@ -1072,7 +1086,7 @@ static int cdn_dp_bind(struct device *dev, struct device *master, void *data) port = dp->port[i];

port->event_nb.notifier_call = cdn_dp_pd_event; - ret = devm_extcon_register_notifier(dp->dev, port->extcon, + ret = devm_extcon_register_notifier(dp->mhdp.dev, port->extcon, EXTCON_DISP_DP, &port->event_nb); if (ret) { @@ -1099,7 +1113,7 @@ static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) { struct cdn_dp_device *dp = dev_get_drvdata(dev); struct drm_encoder *encoder = &dp->encoder; - struct drm_connector *connector = &dp->connector; + struct drm_connector *connector = &dp->mhdp.connector;

cancel_work_sync(&dp->event_work); cdn_dp_encoder_disable(encoder); @@ -1159,7 +1173,7 @@ static int cdn_dp_probe(struct platform_device *pdev) dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); if (!dp) return -ENOMEM; - dp->dev = dev; + dp->mhdp.dev = dev;

match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); dp_data = (struct cdn_dp_data *)match->data; @@ -1204,7 +1218,7 @@ static int cdn_dp_remove(struct platform_device *pdev) struct cdn_dp_device *dp = platform_get_drvdata(pdev);

platform_device_unregister(dp->audio_pdev); - cdn_dp_suspend(dp->dev); + cdn_dp_suspend(dp->mhdp.dev); component_del(&pdev->dev, &cdn_dp_component_ops);

return 0; @@ -1214,7 +1228,7 @@ static void cdn_dp_shutdown(struct platform_device *pdev) { struct cdn_dp_device *dp = platform_get_drvdata(pdev);

- cdn_dp_suspend(dp->dev); + cdn_dp_suspend(dp->mhdp.dev); }

static const struct dev_pm_ops cdn_dp_pm_ops = { diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h b/drivers/gpu/drm/rockchip/cdn-dp-core.h index f57e296401b8..905dc4494795 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-core.h +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h @@ -20,38 +20,10 @@ #include <drm/drm_dp_helper.h> #include <drm/drm_panel.h> #include "rockchip_drm_drv.h" +#include "cdns-mhdp-common.h"

#define MAX_PHY 2

-enum audio_format { - AFMT_I2S = 0, - AFMT_SPDIF = 1, - AFMT_UNUSED, -}; - -struct audio_info { - enum audio_format format; - int sample_rate; - int channels; - int sample_width; -}; - -enum vic_pxl_encoding_format { - PXL_RGB = 0x1, - YCBCR_4_4_4 = 0x2, - YCBCR_4_2_2 = 0x4, - YCBCR_4_2_0 = 0x8, - Y_ONLY = 0x10, -}; - -struct video_info { - bool h_sync_polarity; - bool v_sync_polarity; - bool interlaced; - int color_depth; - enum vic_pxl_encoding_format color_fmt; -}; - struct cdn_firmware_header { u32 size_bytes; /* size of the entire header+image(s) in bytes */ u32 header_size; /* size of just the header in bytes */ @@ -70,11 +42,9 @@ struct cdn_dp_port { };

struct cdn_dp_device { - struct device *dev; + struct cdns_mhdp_device mhdp; struct drm_device *drm_dev; - struct drm_connector connector; struct drm_encoder encoder; - struct drm_display_mode mode; struct platform_device *audio_pdev; struct work_struct event_work; struct edid *edid; @@ -85,22 +55,16 @@ struct cdn_dp_device { bool suspended;

const struct firmware *fw; /* cdn dp firmware */ - unsigned int fw_version; /* cdn fw version */ bool fw_loaded;

- void __iomem *regs; struct regmap *grf; struct clk *core_clk; struct clk *pclk; - struct clk *spdif_clk; struct clk *grf_clk; - struct reset_control *spdif_rst; struct reset_control *dptx_rst; struct reset_control *apb_rst; struct reset_control *core_rst; struct audio_info audio_info; - struct video_info video_info; - struct drm_dp_link link; struct cdn_dp_port *port[MAX_PHY]; u8 ports; u8 lanes;

-- 2.17.1

Damian Kos

11:13 a.m.

New subject: [PATCH v2 2/5] drm/dp: fix link probing for devices supporting DP 1.4+

From: Quentin Schulz quentin.schulz@bootlin.com

DP 1.4 introduced a DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT bit in DP_TRAINING_AUX_RD_INTERVAL register. If set, DPCD registers from DP_DPCD_REV to DP_ADAPTER_CAP should be retrieved starting from DP_DPCD_REV_EXTENDED. All registers are copied except DP_DPCD_REV, DP_MAX_LINK_RATE and DP_DOWNSTREAMPORT_PRESENT which represent the "true capabilities" of DPRX device.

Original DP_DPCD_REV, DP_MAX_LINK_RATE and DP_DOWNSTREAMPORT_PRESENT might falsely return lower capabilities to "avoid interoperability issues with some of the existing DP Source devices that malfunction when they discover the higher capabilities within those three registers.".

Before DP 1.4, DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT bit was reserved and read 0 so it's safe to check against it even if DP revision is <1.4

Signed-off-by: Damian Kos dkos@cadence.com --- drivers/gpu/drm/drm_dp_helper.c | 30 +++++++++++++++++++++++++++++- include/drm/drm_dp_helper.h | 1 + 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 0cccbcb2d03e..86a070269c87 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -370,10 +370,38 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link) { u8 values[3]; int err; + unsigned int addr;

memset(link, 0, sizeof(*link));

- err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values)); + /* + * DP 1.4 introduced a DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT bit in + * DP_TRAINING_AUX_RD_INTERVAL register. If set, DPCD registers from + * DP_DPCD_REV to DP_ADAPTER_CAP should be retrieved starting from + * DP_DPCD_REV_EXTENDED. All registers are copied except DP_DPCD_REV, + * DP_MAX_LINK_RATE and DP_DOWNSTREAMPORT_PRESENT which represent the + * "true capabilities" of DPRX device. + * + * Original DP_DPCD_REV, DP_MAX_LINK_RATE and DP_DOWNSTREAMPORT_PRESENT + * might falsely return lower capabilities to "avoid interoperability + * issues with some of the existing DP Source devices that malfunction + * when they discover the higher capabilities within those three + * registers.". + * + * Before DP 1.4, DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT bit was reserved + * and read 0 so it's safe to check against it even if DP revision is + * <1.4 + */ + err = drm_dp_dpcd_readb(aux, DP_TRAINING_AUX_RD_INTERVAL, values); + if (err < 0) + return err; + + if (values[0] & DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT) + addr = DP_DP13_DPCD_REV; + else + addr = DP_DPCD_REV; + + err = drm_dp_dpcd_read(aux, addr, values, sizeof(values)); if (err < 0) return err;

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 05cc31b5db16..92800f2241b1 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -125,6 +125,7 @@

#define DP_TRAINING_AUX_RD_INTERVAL 0x00e /* XXX 1.2? */ # define DP_TRAINING_AUX_RD_MASK 0x7F /* XXX 1.2? */ +# define DP_EXTENDED_RCVR_CAPA_FIELD_PRESENT BIT(7) /* 1.3 */

#define DP_ADAPTER_CAP 0x00f /* 1.2 */ # define DP_FORCE_LOAD_SENSE_CAP (1 << 0)

-- 2.17.1

Damian Kos

11:13 a.m.

New subject: [PATCH v2 3/5] drm/dp: make dp_link_status and dp_get_lane_status usable from outside of the core

From: Quentin Schulz quentin.schulz@bootlin.com

dp_link_status and dp_get_lane_status are pretty generic and can be used for other means, so let's make it "public".

This adds drm_dp_link_status and drm_dp_get_lane_status to the header file and add the appropriate EXPORT_SYMBOL for it so that it can be used by other drivers, be they compiled built-in or as modules.

Signed-off-by: Damian Kos dkos@cadence.com --- drivers/gpu/drm/drm_dp_helper.c | 20 +++++++++++--------- include/drm/drm_dp_helper.h | 3 +++ 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 86a070269c87..8d10f70465cc 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -43,19 +43,21 @@ */

/* Helpers for DP link training */ -static u8 dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) +u8 drm_dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) { return link_status[r - DP_LANE0_1_STATUS]; } +EXPORT_SYMBOL(drm_dp_link_status);

-static u8 dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], int lane) { int i = DP_LANE0_1_STATUS + (lane >> 1); int s = (lane & 1) * 4; - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i); return (l >> s) & 0xf; } +EXPORT_SYMBOL(drm_dp_get_lane_status);

bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count) @@ -64,12 +66,12 @@ bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], u8 lane_status; int lane;

- lane_align = dp_link_status(link_status, - DP_LANE_ALIGN_STATUS_UPDATED); + lane_align = drm_dp_link_status(link_status, + DP_LANE_ALIGN_STATUS_UPDATED); if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) return false; for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS) return false; } @@ -84,7 +86,7 @@ bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE], u8 lane_status;

for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_LANE_CR_DONE) == 0) return false; } @@ -99,7 +101,7 @@ u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE], int s = ((lane & 1) ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i);

return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; } @@ -112,7 +114,7 @@ u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SI int s = ((lane & 1) ? DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i);

return ((l >> s) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 92800f2241b1..1ba6b6855444 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -952,6 +952,9 @@ #define DP_MST_LOGICAL_PORT_0 8

#define DP_LINK_STATUS_SIZE 6 + +u8 drm_dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r); +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], int lane); bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE],

-- 2.17.1

Damian Kos

11:13 a.m.

New subject: [PATCH v2 4/5] dt-bindings: drm/bridge Document Cadence MHDP DPI/DP bridge bindings

From: Quentin Schulz quentin.schulz@bootlin.com

Signed-off-by: Damian Kos dkos@cadence.com --- .../bindings/display/bridge/cdns,mhdp.txt | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt new file mode 100644 index 000000000000..dc7be7590048 --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt @@ -0,0 +1,43 @@ +Cadence MHDP bridge +========================== + +The Cadence MHDP bridge is a DPI to DP bridge. + +Required properties: +- compatible: should be "cdns,mhdp8546", +- reg: physical base address and length of the controller's registers, +- clocks: DP bridge clock, it's used by the IP to know how to translate + a number of clock cycles into a time (which is used to comply + with DP standard timings and delays), + +Required subnodes: +- ports: Ports as described in Documentation/devictree/bindings/graph.txt + Port 0 - input port representing the VGA bridge input + Port 1 - output port representing the VGA bridge output + +Example: + + mhdp: dp-bridge@f0fb000000 { + compatible = "cdns,mhdp8546"; + reg = <0xf0 0xfb000000 0x0 0x1000000>; + clocks = <&mhdp_clock>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + vga_bridge_input: endpoint { + remote-endpoint = <&xxx_dpi_output>; + }; + }; + + port@1 { + reg = <1>; + vga_bridge_output: endpoint { + remote-endpoint = <&xxx_vga_connector_input>; + }; + }; + }; + };

-- 2.17.1

Rob Herring

25 Jul 25 Jul

5:43 p.m.

New subject: [PATCH v2 4/5] dt-bindings: drm/bridge Document Cadence MHDP DPI/DP bridge bindings

On Tue, Jul 24, 2018 at 12:13:35PM +0100, Damian Kos wrote:

...

From: Quentin Schulz quentin.schulz@bootlin.com

Signed-off-by: Damian Kos dkos@cadence.com

.../bindings/display/bridge/cdns,mhdp.txt | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt new file mode 100644 index 000000000000..dc7be7590048 --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt @@ -0,0 +1,43 @@ +Cadence MHDP bridge +==========================

+The Cadence MHDP bridge is a DPI to DP bridge.

+Required properties: +- compatible: should be "cdns,mhdp8546", +- reg: physical base address and length of the controller's registers, +- clocks: DP bridge clock, it's used by the IP to know how to translate

a number of clock cycles into a time (which is used to comply

with DP standard timings and delays),

+Required subnodes: +- ports: Ports as described in Documentation/devictree/bindings/graph.txt

Port 0 - input port representing the VGA bridge input

Port 1 - output port representing the VGA bridge output

VGA?

...

+Example:

mhdp: dp-bridge@f0fb000000 {
```
compatible = "cdns,mhdp8546";
```
```
reg = <0xf0 0xfb000000 0x0 0x1000000>;
```
```
clocks = <&mhdp_clock>;
```
```
ports {
```
```
	#address-cells = <1>;
```
```
	#size-cells = <0>;
```
```
	port@0 {
```
```
		reg = <0>;
```
```
		vga_bridge_input: endpoint {
```

			remote-endpoint = <&xxx_dpi_output>;

```
		};
```
```
	};
```
```
	port@1 {
```
```
		reg = <1>;
```
```
		vga_bridge_output: endpoint {
```

			remote-endpoint = <&xxx_vga_connector_input>;

vga?

...

		};
	};
};
};
-- 2.17.1

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Damian Kos

24 Jul 24 Jul

11:13 a.m.

New subject: [PATCH v2 5/5] drm/bridge: add preliminary driver for cadence dpi/dp bridge

From: Quentin Schulz quentin.schulz@bootlin.com

This patch finally adds the preliminary driver for Cadence MHDP DPI/DP bridge.

Changes made in the low level driver: - functions for writing register and register bits are now public - added functions for reading registers and link training adjustment

Signed-off-by: Damian Kos dkos@cadence.com --- drivers/gpu/drm/bridge/Makefile | 2 +- drivers/gpu/drm/bridge/cdns-mhdp-common.c | 110 +- drivers/gpu/drm/bridge/cdns-mhdp-common.h | 11 + drivers/gpu/drm/bridge/cdns-mhdp.c | 1233 +++++++++++++++++++++ 4 files changed, 1353 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp.c

diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index c9b35f736a00..5e2a84734c7a 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o -obj-$(CONFIG_DRM_CDNS_MHDP) += cdns-mhdp-common.o +obj-$(CONFIG_DRM_CDNS_MHDP) += cdns-mhdp.o cdns-mhdp-common.o obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-common.c b/drivers/gpu/drm/bridge/cdns-mhdp-common.c index 813319481220..5c426b04cf65 100644 --- a/drivers/gpu/drm/bridge/cdns-mhdp-common.c +++ b/drivers/gpu/drm/bridge/cdns-mhdp-common.c @@ -191,7 +191,55 @@ static int cdns_mhdp_mailbox_send(struct cdns_mhdp_device *mhdp, u8 module_id, return 0; }

-static int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val) +int cdns_mhdp_reg_read(struct cdns_mhdp_device *mhdp, u32 addr, u32 *value) +{ + u8 msg[4], resp[8]; + int ret; + + if (addr == 0) { + ret = -EINVAL; + goto err_reg_read; + } + + msg[0] = (u8)(addr >> 24); + msg[1] = (u8)(addr >> 16); + msg[2] = (u8)(addr >> 8); + msg[3] = (u8)addr; + + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_GENERAL, + GENERAL_REGISTER_READ, + sizeof(msg), msg); + if (ret) + goto err_reg_read; + + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_GENERAL, + GENERAL_REGISTER_READ, + sizeof(resp)); + if (ret) + goto err_reg_read; + + ret = cdns_mhdp_mailbox_read_receive(mhdp, resp, sizeof(resp)); + if (ret) + goto err_reg_read; + + /* Returned address value should be the same as requested */ + if (memcmp(msg, resp, sizeof(msg))) { + ret = -EINVAL; + goto err_reg_read; + } + + *value = (resp[4] << 24) | (resp[5] << 16) | (resp[6] << 8) | resp[7]; + +err_reg_read: + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to read register.\n"); + *value = 0; + } + + return ret; +} + +int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val) { u8 msg[6];

@@ -205,7 +253,7 @@ static int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val) DPTX_WRITE_REGISTER, sizeof(msg), msg); }

-static int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr, +int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr, u8 start_bit, u8 bits_no, u32 val) { u8 field[8]; @@ -979,3 +1027,61 @@ int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp, DRM_DEV_ERROR(mhdp->dev, "audio config failed: %d\n", ret); return ret; } + +int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp, + u8 nlanes, u16 udelay, u8 *lanes_data, u8 *dpcd) +{ + u8 payload[7]; + u8 hdr[5]; /* For DPCD read response header */ + u32 addr; + u8 const nregs = 6; /* Registers 0x202-0x207 */ + int ret; + + if (nlanes != 4 && nlanes != 2 && nlanes != 1) { + DRM_DEV_ERROR(mhdp->dev, "invalid number of lanes: %d\n", + nlanes); + ret = -EINVAL; + goto err_adjust_lt; + } + + payload[0] = nlanes; + payload[1] = (u8)(udelay >> 8); + payload[2] = (u8)udelay; + + payload[3] = lanes_data[0]; + if (nlanes > 1) + payload[4] = lanes_data[1]; + if (nlanes > 2) { + payload[5] = lanes_data[2]; + payload[6] = lanes_data[3]; + } + + ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + DPTX_ADJUST_LT, + sizeof(payload), payload); + if (ret) + goto err_adjust_lt; + + /* Yes, read the DPCD read command response */ + ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_DP_TX, + DPTX_READ_DPCD, + sizeof(hdr) + nregs); + if (ret) + goto err_adjust_lt; + + ret = cdns_mhdp_mailbox_read_receive(mhdp, hdr, sizeof(hdr)); + if (ret) + goto err_adjust_lt; + + addr = (hdr[2] << 24) | (hdr[3] << 8) | hdr[4]; + if (addr != DP_LANE0_1_STATUS) + goto err_adjust_lt; + + ret = cdns_mhdp_mailbox_read_receive(mhdp, dpcd, nregs); + +err_adjust_lt: + if (ret) + DRM_DEV_ERROR(mhdp->dev, "Failed to adjust Link Training.\n"); + + return ret; +} diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-common.h b/drivers/gpu/drm/bridge/cdns-mhdp-common.h index b0101f10594a..bdebe9e0a640 100644 --- a/drivers/gpu/drm/bridge/cdns-mhdp-common.h +++ b/drivers/gpu/drm/bridge/cdns-mhdp-common.h @@ -330,6 +330,7 @@ #define GENERAL_TEST_ECHO 0x02 #define GENERAL_BUS_SETTINGS 0x03 #define GENERAL_TEST_ACCESS 0x04 +#define GENERAL_REGISTER_READ 0x07

#define DPTX_SET_POWER_MNG 0x00 #define DPTX_SET_HOST_CAPABILITIES 0x01 @@ -349,6 +350,7 @@ #define DPTX_SET_LINK_BREAK_POINT 0x0f #define DPTX_FORCE_LANES 0x10 #define DPTX_HPD_STATE 0x11 +#define DPTX_ADJUST_LT 0x12

#define FW_STANDBY 0 #define FW_ACTIVE 1 @@ -554,4 +556,13 @@ int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp, int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable); int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp, struct audio_info *audio); +int cdns_mhdp_register_read(struct cdns_mhdp_device *mhdp, u32 addr, + u32 *value); +int cdns_mhdp_reg_read(struct cdns_mhdp_device *mhdp, u32 addr, u32 *value); +int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val); +int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr, + u8 start_bit, u8 bits_no, u32 val); +int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp, u8 nlanes, + u16 udelay, u8 *lanes_data, + u8 *dpcd); #endif /* CDNS_MHDP_COMMON_H_ */ diff --git a/drivers/gpu/drm/bridge/cdns-mhdp.c b/drivers/gpu/drm/bridge/cdns-mhdp.c new file mode 100644 index 000000000000..e31a1a11c96f --- /dev/null +++ b/drivers/gpu/drm/bridge/cdns-mhdp.c @@ -0,0 +1,1233 @@ +// SPDX-License-Identifier: GPL v2 +/* + * Cadence MHDP DP bridge driver. + * + * Copyright: 2018 Cadence Design Systems, Inc. + * + * Author: Quentin Schulz quentin.schulz@free-electrons.com + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/firmware.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_bridge.h> +#include <drm/drm_connector.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_modeset_helper_vtables.h> + +#include "cdns-mhdp-common.h" + +#define DEBUG_MSG + +#define IRAM_FW_NAME "cadence_mhdp_iram_fw.bin" +#define DRAM_FW_NAME "cadence_mhdp_dram_fw.bin" + +#define CDNS_APB_CFG 0x00000 +#define CDNS_APB_CTRL (CDNS_APB_CFG + 0x00) +#define CDNS_MAILBOX_FULL (CDNS_APB_CFG + 0x08) +#define CDNS_MAILBOX_EMPTY (CDNS_APB_CFG + 0x0c) +#define CDNS_MAILBOX_TX_DATA (CDNS_APB_CFG + 0x10) +#define CDNS_MAILBOX_RX_DATA (CDNS_APB_CFG + 0x14) +#define CDNS_KEEP_ALIVE (CDNS_APB_CFG + 0x18) +#define CDNS_KEEP_ALIVE_MASK GENMASK(7, 0) + +#define CDNS_SW_CLK_L (CDNS_APB_CFG + 0x3c) +#define CDNS_SW_CLK_H (CDNS_APB_CFG + 0x40) +#define CDNS_SW_EVENT0 (CDNS_APB_CFG + 0x44) +#define CDNS_DPTX_HPD BIT(0) + +#define CDNS_SW_EVENT1 (CDNS_APB_CFG + 0x48) +#define CDNS_SW_EVENT2 (CDNS_APB_CFG + 0x4c) +#define CDNS_SW_EVENT3 (CDNS_APB_CFG + 0x50) + +#define CDNS_SOURCE_VIDEO_INTERFACE 0x00b00 +#define CDNS_BND_HSYNC2VSYNC (CDNS_SOURCE_VIDEO_INTERFACE + \ + 0x00) +#define CDNS_IP_DTCT_WIN GENMASK(11, 0) +#define CDNS_IP_DET_INTERLACE_FORMAT BIT(12) +#define CDNS_IP_BYPASS_V_INTERFACE BIT(13) + +#define CDNS_HSYNC2VSYNC_POL_CTRL (CDNS_SOURCE_VIDEO_INTERFACE + \ + 0x10) +#define CDNS_H2V_HSYNC_POL_ACTIVE_LOW BIT(1) +#define CDNS_H2V_VSYNC_POL_ACTIVE_LOW BIT(2) + +#define CDNS_DPTX_PHY_CONFIG 0x02000 +#define CDNS_PHY_TRAINING_EN BIT(0) +#define CDNS_PHY_TRAINING_TYPE(x) (((x) & GENMASK(3, 0)) << 1) +#define CDNS_PHY_SCRAMBLER_BYPASS BIT(5) +#define CDNS_PHY_ENCODER_BYPASS BIT(6) +#define CDNS_PHY_SKEW_BYPASS BIT(7) +#define CDNS_PHY_TRAINING_AUTO BIT(8) +#define CDNS_PHY_LANE0_SKEW(x) (((x) & GENMASK(2, 0)) << 9) +#define CDNS_PHY_LANE1_SKEW(x) (((x) & GENMASK(2, 0)) << 12) +#define CDNS_PHY_LANE2_SKEW(x) (((x) & GENMASK(2, 0)) << 15) +#define CDNS_PHY_LANE3_SKEW(x) (((x) & GENMASK(2, 0)) << 18) +#define CDNS_PHY_COMMON_CONFIG (CDNS_PHY_LANE1_SKEW(1) | \ + CDNS_PHY_LANE2_SKEW(2) | \ + CDNS_PHY_LANE3_SKEW(3)) +#define CDNS_PHY_10BIT_EN BIT(21) + +#define CDNS_DPTX_FRAMER 0x02200 +#define CDNS_DP_FRAMER_GLOBAL_CONFIG (CDNS_DPTX_FRAMER + 0x00) +#define CDNS_DP_NUM_LANES(x) (x - 1) +#define CDNS_DP_FRAMER_EN BIT(3) +#define CDNS_DP_RATE_GOVERNOR_EN BIT(4) +#define CDNS_DP_NO_VIDEO_MODE BIT(5) +#define CDNS_DP_DISABLE_PHY_RST BIT(6) +#define CDNS_DP_WR_FAILING_EDGE_VSYNC BIT(7) + +#define CDNS_DP_SW_RESET (CDNS_DPTX_FRAMER + 0x04) +#define CDNS_DP_FRAMER_TU (CDNS_DPTX_FRAMER + 0x08) +#define CDNS_DP_FRAMER_TU_SIZE(x) (((x) & GENMASK(6, 0)) << 8) +#define CDNS_DP_FRAMER_TU_VS(x) ((x) & GENMASK(5, 0)) +#define CDNS_DP_FRAMER_TU_CNT_RST_EN BIT(15) + +#define CDNS_DPTX_STREAM 0x03000 +#define CDNS_DP_MSA_HORIZONTAL_0 (CDNS_DPTX_STREAM + 0x00) +#define CDNS_DP_MSAH0_H_TOTAL(x) (x) +#define CDNS_DP_MSAH0_HSYNC_START(x) ((x) << 16) + +#define CDNS_DP_MSA_HORIZONTAL_1 (CDNS_DPTX_STREAM + 0x04) +#define CDNS_DP_MSAH1_HSYNC_WIDTH(x) (x) +#define CDNS_DP_MSAH1_HSYNC_POL_LOW BIT(15) +#define CDNS_DP_MSAH1_HDISP_WIDTH(x) ((x) << 16) + +#define CDNS_DP_MSA_VERTICAL_0 (CDNS_DPTX_STREAM + 0x08) +#define CDNS_DP_MSAV0_V_TOTAL(x) (x) +#define CDNS_DP_MSAV0_VSYNC_START(x) ((x) << 16) + +#define CDNS_DP_MSA_VERTICAL_1 (CDNS_DPTX_STREAM + 0x0c) +#define CDNS_DP_MSAV1_VSYNC_WIDTH(x) (x) +#define CDNS_DP_MSAV1_VSYNC_POL_LOW BIT(15) +#define CDNS_DP_MSAV1_VDISP_WIDTH(x) ((x) << 16) + +#define CDNS_DP_MSA_MISC (CDNS_DPTX_STREAM + 0x10) +#define CDNS_DP_STREAM_CONFIG (CDNS_DPTX_STREAM + 0x14) +#define CDNS_DP_RATE_GOVERNOR_STATUS (CDNS_DPTX_STREAM + 0x2c) +#define CDNS_DP_RG_TU_VS_DIFF(x) ((x) << 8) + +#define CDNS_DP_HORIZONTAL (CDNS_DPTX_STREAM + 0x30) +#define CDNS_DP_H_HSYNC_WIDTH(x) (x) +#define CDNS_DP_H_H_TOTAL(x) ((x) << 16) + +#define CDNS_DP_VERTICAL_0 (CDNS_DPTX_STREAM + 0x34) +#define CDNS_DP_V0_VHEIGHT(x) (x) +#define CDNS_DP_V0_VSTART(x) ((x) << 16) + +#define CDNS_DP_VERTICAL_1 (CDNS_DPTX_STREAM + 0x38) +#define CDNS_DP_V1_VTOTAL(x) (x) +#define CDNS_DP_V1_VTOTAL_EVEN BIT(16) + +#define CDNS_DP_FRAMER_PXL_REPR (CDNS_DPTX_STREAM + 0x4c) +#define CDNS_DP_FRAMER_6_BPC BIT(0) +#define CDNS_DP_FRAMER_8_BPC BIT(1) +#define CDNS_DP_FRAMER_10_BPC BIT(2) +#define CDNS_DP_FRAMER_12_BPC BIT(3) +#define CDNS_DP_FRAMER_16_BPC BIT(4) +#define CDNS_DP_FRAMER_PXL_FORMAT 0x8 +#define CDNS_DP_FRAMER_RGB BIT(0) +#define CDNS_DP_FRAMER_YCBCR444 BIT(1) +#define CDNS_DP_FRAMER_YCBCR422 BIT(2) +#define CDNS_DP_FRAMER_YCBCR420 BIT(3) +#define CDNS_DP_FRAMER_Y_ONLY BIT(4) + +#define CDNS_DP_FRAMER_SP (CDNS_DPTX_STREAM + 0x10) +#define CDNS_DP_FRAMER_VSYNC_POL_LOW BIT(0) +#define CDNS_DP_FRAMER_HSYNC_POL_LOW BIT(1) +#define CDNS_DP_FRAMER_INTERLACE BIT(2) + +#define CDNS_DP_LINE_THRESH (CDNS_DPTX_STREAM + 0x64) +#define CDNS_DP_VB_ID (CDNS_DPTX_STREAM + 0x68) +#define CDNS_DP_VB_ID_INTERLACED BIT(2) + +#define CDNS_DP_FRONT_BACK_PORCH (CDNS_DPTX_STREAM + 0x78) +#define CDNS_DP_BACK_PORCH(x) (x) +#define CDNS_DP_FRONT_PORCH(x) ((x) << 16) + +#define CDNS_DP_BYTE_COUNT (CDNS_DPTX_STREAM + 0x7c) + +#define CDNS_DPTX_GLOBAL 0x02300 +#define CDNS_DP_LANE_EN (CDNS_DPTX_GLOBAL + 0x00) +#define CDNS_DP_LANE_EN_LANES(x) GENMASK(x - 1, 0) +#define CDNS_DP_ENHNCD (CDNS_DPTX_GLOBAL + 0x04) + +#define CDNS_MHDP_IMEM 0x10000 +#define CDNS_MHDP_DMEM 0x20000 + +#define CDNS_DP_TRAINING_PATTERN_4 0x7 + +/* 3min delay because of EDID mb being VERY slow */ +/* FIXME: should be >615000 when upstreaming */ +#define CDNS_TIMEOUT_MAILBOX (1000 * 1000 * 60 * 3) + +/* FIXME: Should be 2000 */ +#define CDNS_KEEP_ALIVE_TIMEOUT 40000 +#define CDNS_SW_EVENT0_TIMEOUT 40000 + +static const struct of_device_id mhdp_ids[] = { + { .compatible = "cdns,mhdp8546", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mhdp_ids); + +#define CDNS_LANE_1 BIT(0) +#define CDNS_LANE_2 BIT(1) +#define CDNS_LANE_4 BIT(2) +#define CDNS_SSC BIT(3) +#define CDNS_SCRAMBLER BIT(4) + +#define CDNS_VOLT_SWING(x) ((x) & GENMASK(1, 0)) +#define CDNS_FORCE_VOLT_SWING BIT(2) + +#define CDNS_PRE_EMPHASIS(x) ((x) & GENMASK(1, 0)) +#define CDNS_FORCE_PRE_EMPHASIS BIT(2) + +#define CDNS_SUPPORT_TPS(x) BIT((x) - 1) + +#define CDNS_FAST_LINK_TRAINING BIT(0) + +#define CDNS_LANE_MAPPING_TYPE_C_LANE_0(x) ((x) & GENMASK(1, 0)) +#define CDNS_LANE_MAPPING_TYPE_C_LANE_1(x) ((x) & GENMASK(3, 2)) +#define CDNS_LANE_MAPPING_TYPE_C_LANE_2(x) ((x) & GENMASK(5, 4)) +#define CDNS_LANE_MAPPING_TYPE_C_LANE_3(x) ((x) & GENMASK(7, 6)) +#define CDNS_LANE_MAPPING_NORMAL 0xe4 +#define CDNS_LANE_MAPPING_FLIPPED 0x1b + +#define CDNS_DP_MAX_NUM_LANES 4 +#define CDNS_DP_TEST_VSC_SDP (1 << 6) /* 1.3+ */ +#define CDNS_DP_TEST_COLOR_FORMAT_RAW_Y_ONLY (1 << 7) + +static inline struct cdns_mhdp_device *connector_to_mhdp( + struct drm_connector *conn) +{ + return container_of(conn, struct cdns_mhdp_device, connector); +} + +static inline struct cdns_mhdp_device *bridge_to_mhdp( + struct drm_bridge *bridge) +{ + return container_of(bridge, struct cdns_mhdp_device, bridge); +} + +static unsigned int max_link_rate(struct cdns_mhdp_host host, + struct cdns_mhdp_sink sink) +{ + return min(host.link_rate, sink.link_rate); +} + +static u8 eq_training_pattern_supported(struct cdns_mhdp_host host, + struct cdns_mhdp_sink sink) +{ + return fls(host.pattern_supp & sink.pattern_supp); +} + +static ssize_t mhdp_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct cdns_mhdp_device *mhdp = dev_get_drvdata(aux->dev); + int ret; + + if (msg->request != DP_AUX_NATIVE_WRITE && + msg->request != DP_AUX_NATIVE_READ) + return -ENOTSUPP; + + if (msg->request == DP_AUX_NATIVE_WRITE) { + int i; + + for (i = 0; i < msg->size; ++i) { + ret = cdns_mhdp_dpcd_write(mhdp, + msg->address + i, + *((u8 *)msg->buffer + i)); + if (!ret) + continue; + + DRM_DEV_ERROR(mhdp->dev, "Failed to write DPCD\n"); + + return i; + } + } else { + ret = cdns_mhdp_dpcd_read(mhdp, msg->address, + msg->buffer, msg->size); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to read DPCD\n"); + return 0; + } + } + + return msg->size; +} + +static int cdns_mhdp_get_modes(struct drm_connector *connector) +{ + struct cdns_mhdp_device *mhdp = connector_to_mhdp(connector); + struct edid *edid; + int num_modes; + + edid = drm_do_get_edid(connector, cdns_mhdp_get_edid_block, mhdp); + + drm_connector_update_edid_property(connector, edid); + + num_modes = drm_add_edid_modes(connector, edid); + + return num_modes; +} + +static const struct drm_connector_helper_funcs cdns_mhdp_conn_helper_funcs = { + .get_modes = cdns_mhdp_get_modes, +}; + +static enum drm_connector_status cdns_mhdp_detect(struct drm_connector *conn, + bool force) +{ + struct cdns_mhdp_device *mhdp = connector_to_mhdp(conn); + enum drm_connector_status status = connector_status_disconnected; + int ret; + + ret = cdns_mhdp_get_hpd_status(mhdp); + if (ret > 0) + status = connector_status_connected; + else if (ret < 0) + dev_err(mhdp->dev, "Failed to obtain HPD state\n"); + + return status; +} + +static const struct drm_connector_funcs cdns_mhdp_conn_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, + .reset = drm_atomic_helper_connector_reset, + .destroy = drm_connector_cleanup, + .dpms = drm_helper_connector_dpms, + .detect = cdns_mhdp_detect, +}; + +static int cdns_mhdp_attach(struct drm_bridge *bridge) +{ + struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge); + struct drm_connector *conn = &mhdp->connector; + int ret; + + conn->polled = DRM_CONNECTOR_POLL_CONNECT | + DRM_CONNECTOR_POLL_DISCONNECT; + + ret = drm_connector_init(bridge->dev, conn, &cdns_mhdp_conn_funcs, + DRM_MODE_CONNECTOR_DisplayPort); + if (ret) { + dev_err(mhdp->dev, "failed to init connector\n"); + return ret; + } + + drm_connector_helper_add(conn, &cdns_mhdp_conn_helper_funcs); + + ret = drm_connector_attach_encoder(conn, bridge->encoder); + if (ret) { + dev_err(mhdp->dev, "failed to attach connector to encoder\n"); + return ret; + } + + return 0; +} + +enum pixel_format { + PIXEL_FORMAT_RGB = 1, + PIXEL_FORMAT_YCBCR_444 = 2, + PIXEL_FORMAT_YCBCR_422 = 4, + PIXEL_FORMAT_YCBCR_420 = 8, + PIXEL_FORMAT_Y_ONLY = 16, +}; + +static void mhdp_link_training_init(struct cdns_mhdp_device *mhdp) +{ + u32 reg32; + + drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, + DP_TRAINING_PATTERN_DISABLE); + + /* Reset PHY configuration */ + reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1); + if (!(mhdp->host.lanes_cnt & CDNS_SCRAMBLER)) + reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; + + cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_ENHNCD, + mhdp->sink.enhanced & mhdp->host.enhanced); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_LANE_EN, + CDNS_DP_LANE_EN_LANES(mhdp->link.num_lanes)); + + drm_dp_link_configure(&mhdp->aux, &mhdp->link); + + cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, + CDNS_PHY_COMMON_CONFIG | + CDNS_PHY_TRAINING_EN | + CDNS_PHY_TRAINING_TYPE(1) | + CDNS_PHY_SCRAMBLER_BYPASS); + + drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, + DP_TRAINING_PATTERN_1 | DP_LINK_SCRAMBLING_DISABLE); +} + +static void mhdp_get_adjust_train(struct cdns_mhdp_device *mhdp, + u8 link_status[DP_LINK_STATUS_SIZE], + u8 lanes_data[CDNS_DP_MAX_NUM_LANES]) +{ + unsigned int i; + u8 adjust, max_pre_emphasis, max_volt_swing; + + max_pre_emphasis = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis) + << DP_TRAIN_PRE_EMPHASIS_SHIFT; + max_volt_swing = CDNS_VOLT_SWING(mhdp->host.volt_swing); + + for (i = 0; i < mhdp->link.num_lanes; i++) { + adjust = drm_dp_get_adjust_request_voltage(link_status, i); + lanes_data[i] = min_t(u8, adjust, max_volt_swing); + if (lanes_data[i] != adjust) + lanes_data[i] |= DP_TRAIN_MAX_SWING_REACHED; + + adjust = drm_dp_get_adjust_request_pre_emphasis(link_status, i); + lanes_data[i] |= min_t(u8, adjust, max_pre_emphasis); + if ((lanes_data[i] >> DP_TRAIN_PRE_EMPHASIS_SHIFT) != adjust) + lanes_data[i] |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; + } +} + +static void mhdp_set_adjust_request_voltage( + u8 link_status[DP_LINK_STATUS_SIZE], int lane, u8 volt) +{ + int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); + int s = ((lane & 1) ? + DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : + DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); + int idx = i - DP_LANE0_1_STATUS; + + link_status[idx] &= ~(DP_ADJUST_VOLTAGE_SWING_LANE0_MASK << s); + link_status[idx] |= volt << s; +} + +static void mhdp_set_adjust_request_pre_emphasis( + u8 link_status[DP_LINK_STATUS_SIZE], int lane, u8 pre_emphasis) +{ + int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); + int s = ((lane & 1) ? + DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : + DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); + int idx = i - DP_LANE0_1_STATUS; + + link_status[idx] &= ~(DP_ADJUST_PRE_EMPHASIS_LANE0_MASK << s); + link_status[idx] |= pre_emphasis << s; +} + +static void mhdp_adjust_requested_eq(struct cdns_mhdp_device *mhdp, + u8 link_status[DP_LINK_STATUS_SIZE]) +{ + unsigned int i; + u8 pre, volt, max_pre = CDNS_VOLT_SWING(mhdp->host.volt_swing), + max_volt = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis); + + for (i = 0; i < mhdp->link.num_lanes; i++) { + volt = drm_dp_get_adjust_request_voltage(link_status, i); + pre = drm_dp_get_adjust_request_pre_emphasis(link_status, i); + if (volt + pre > 3) + mhdp_set_adjust_request_voltage(link_status, i, + 3 - pre); + if (mhdp->host.volt_swing & CDNS_FORCE_VOLT_SWING) + mhdp_set_adjust_request_voltage(link_status, i, + max_volt); + if (mhdp->host.pre_emphasis & CDNS_FORCE_PRE_EMPHASIS) + mhdp_set_adjust_request_pre_emphasis(link_status, i, + max_pre); + } +} + +static bool mhdp_link_training_channel_eq(struct cdns_mhdp_device *mhdp, + u8 eq_tps, + unsigned int training_interval) +{ + u8 lanes_data[CDNS_DP_MAX_NUM_LANES], fail_counter_short = 0; + u8 dpcd[DP_LINK_STATUS_SIZE]; + u32 reg32; + + dev_dbg(mhdp->dev, "Link training - Starting EQ phase\n"); + + /* Enable link training TPS[eq_tps] in PHY */ + reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_EN | + CDNS_PHY_TRAINING_TYPE(eq_tps); + if (eq_tps != 4) + reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; + cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + + drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, + (eq_tps != 4) ? eq_tps | DP_LINK_SCRAMBLING_DISABLE : + CDNS_DP_TRAINING_PATTERN_4); + + drm_dp_dpcd_read_link_status(&mhdp->aux, dpcd); + + do { + mhdp_get_adjust_train(mhdp, dpcd, lanes_data); + + cdns_mhdp_adjust_lt(mhdp, mhdp->link.num_lanes, + training_interval, lanes_data, dpcd); + + if (!drm_dp_clock_recovery_ok(dpcd, mhdp->link.num_lanes)) + goto err; + + if (drm_dp_channel_eq_ok(dpcd, mhdp->link.num_lanes)) { + dev_dbg(mhdp->dev, + "Link training: EQ phase succeeded\n"); + return true; + } + + fail_counter_short++; + + mhdp_adjust_requested_eq(mhdp, dpcd); + } while (fail_counter_short < 5); + +err: + dev_dbg(mhdp->dev, + "Link training - EQ phase failed for %d lanes and %d rate\n", + mhdp->link.num_lanes, mhdp->link.rate); + + return false; +} + +static void mhdp_adjust_requested_cr(struct cdns_mhdp_device *mhdp, + u8 link_status[DP_LINK_STATUS_SIZE], + u8 *req_volt, u8 *req_pre) +{ + unsigned int i, max_volt = CDNS_VOLT_SWING(mhdp->host.volt_swing), + max_pre = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis); + + for (i = 0; i < mhdp->link.num_lanes; i++) { + if (mhdp->host.volt_swing & CDNS_FORCE_VOLT_SWING) + mhdp_set_adjust_request_voltage(link_status, i, + max_volt); + else + mhdp_set_adjust_request_voltage(link_status, i, + req_volt[i]); + + if (mhdp->host.pre_emphasis & CDNS_FORCE_PRE_EMPHASIS) + mhdp_set_adjust_request_pre_emphasis(link_status, i, + max_pre); + else + mhdp_set_adjust_request_pre_emphasis(link_status, i, + req_pre[i]); + } +} + +static void mhdp_validate_cr(struct cdns_mhdp_device *mhdp, bool *cr_done, + bool *same_before_adjust, bool *max_swing_reached, + u8 before_cr[DP_LINK_STATUS_SIZE], + u8 after_cr[DP_LINK_STATUS_SIZE], u8 *req_volt, + u8 *req_pre) +{ + unsigned int i; + u8 tmp, max_volt = CDNS_VOLT_SWING(mhdp->host.volt_swing), + max_pre = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis), lane_status; + bool same_pre, same_volt; + + *same_before_adjust = false; + *max_swing_reached = false; + *cr_done = true; + + for (i = 0; i < mhdp->link.num_lanes; i++) { + tmp = drm_dp_get_adjust_request_voltage(after_cr, i); + req_volt[i] = min_t(u8, tmp, max_volt); + + tmp = drm_dp_get_adjust_request_pre_emphasis(after_cr, i) >> + DP_TRAIN_PRE_EMPHASIS_SHIFT; + req_pre[i] = min_t(u8, tmp, max_pre); + + same_pre = (before_cr[i] & DP_TRAIN_PRE_EMPHASIS_MASK) == + (req_pre[i] << DP_TRAIN_PRE_EMPHASIS_SHIFT); + same_volt = (before_cr[i] & DP_TRAIN_VOLTAGE_SWING_MASK) == + req_volt[i]; + if (same_pre && same_volt) + *same_before_adjust = true; + + lane_status = drm_dp_get_lane_status(after_cr, i); + if (!(lane_status & DP_LANE_CR_DONE)) { + *cr_done = false; + /* 3.1.5.2 in DP Standard v1.4. Table 3-1 */ + if (req_volt[i] + req_pre[i] >= 3) { + *max_swing_reached = true; + return; + } + } + } +} + +static bool mhdp_link_training_clock_recovery(struct cdns_mhdp_device *mhdp) +{ + u8 lanes_data[CDNS_DP_MAX_NUM_LANES], fail_counter_short = 0, + fail_counter_cr_long = 0; + u8 dpcd[DP_LINK_STATUS_SIZE]; + bool cr_done; + + dev_dbg(mhdp->dev, "Link training starting CR phase\n"); + + mhdp_link_training_init(mhdp); + + drm_dp_dpcd_read_link_status(&mhdp->aux, dpcd); + + do { + u8 requested_adjust_volt_swing[CDNS_DP_MAX_NUM_LANES] = {}, + requested_adjust_pre_emphasis[CDNS_DP_MAX_NUM_LANES] = {}; + bool same_before_adjust, max_swing_reached; + + mhdp_get_adjust_train(mhdp, dpcd, lanes_data); + + cdns_mhdp_adjust_lt(mhdp, mhdp->link.num_lanes, 100, + lanes_data, dpcd); + + mhdp_validate_cr(mhdp, &cr_done, &same_before_adjust, + &max_swing_reached, lanes_data, dpcd, + requested_adjust_volt_swing, + requested_adjust_pre_emphasis); + + if (max_swing_reached) + goto err; + + if (cr_done) { + dev_dbg(mhdp->dev, + "Link training: CR phase succeeded\n"); + return true; + } + + /* Not all CR_DONE bits set */ + fail_counter_cr_long++; + + if (same_before_adjust) { + fail_counter_short++; + continue; + } + + fail_counter_short = 0; + /* + * Voltage swing/pre-emphasis adjust requested + * during CR phase + */ + mhdp_adjust_requested_cr(mhdp, dpcd, + requested_adjust_volt_swing, + requested_adjust_pre_emphasis); + } while (fail_counter_short < 5 && fail_counter_cr_long < 10); + +err: + dev_dbg(mhdp->dev, + "Link training: CR phase failed for %d lanes and %d rate\n", + mhdp->link.num_lanes, mhdp->link.rate); + + return false; +} + +static void lower_link_rate(struct drm_dp_link *link) +{ + switch (drm_dp_link_rate_to_bw_code(link->rate)) { + case DP_LINK_BW_2_7: + link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_1_62); + break; + case DP_LINK_BW_5_4: + link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_2_7); + break; + case DP_LINK_BW_8_1: + link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4); + break; + } +} + +static int mhdp_link_training(struct cdns_mhdp_device *mhdp, + unsigned int video_mode, + unsigned int training_interval) +{ + u32 reg32; + u8 eq_tps = eq_training_pattern_supported(mhdp->host, mhdp->sink); + + while (1) { + if (!mhdp_link_training_clock_recovery(mhdp)) { + if (drm_dp_link_rate_to_bw_code(mhdp->link.rate) != + DP_LINK_BW_1_62) { + dev_dbg(mhdp->dev, + "Reducing link rate during CR phase\n"); + lower_link_rate(&mhdp->link); + drm_dp_link_configure(&mhdp->aux, &mhdp->link); + + continue; + } else if (mhdp->link.num_lanes > 1) { + dev_dbg(mhdp->dev, + "Reducing lanes number during CR phase\n"); + mhdp->link.num_lanes >>= 1; + mhdp->link.rate = max_link_rate(mhdp->host, + mhdp->sink); + drm_dp_link_configure(&mhdp->aux, &mhdp->link); + + continue; + } + + dev_dbg(mhdp->dev, + "Link training failed during CR phase\n"); + goto err; + } + + if (mhdp_link_training_channel_eq(mhdp, eq_tps, + training_interval)) + break; + + if (mhdp->link.num_lanes > 1) { + dev_dbg(mhdp->dev, + "Reducing lanes number during EQ phase\n"); + mhdp->link.num_lanes >>= 1; + drm_dp_link_configure(&mhdp->aux, &mhdp->link); + + continue; + } else if (drm_dp_link_rate_to_bw_code(mhdp->link.rate) != + DP_LINK_BW_1_62) { + dev_dbg(mhdp->dev, + "Reducing link rate during EQ phase\n"); + lower_link_rate(&mhdp->link); + drm_dp_link_configure(&mhdp->aux, &mhdp->link); + + continue; + } + + dev_dbg(mhdp->dev, "Link training failed during EQ phase\n"); + goto err; + } + + dev_dbg(mhdp->dev, "Link training successful\n"); + + drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, + (mhdp->host.lanes_cnt & CDNS_SCRAMBLER) ? 0 : + DP_LINK_SCRAMBLING_DISABLE); + + /* SW reset DPTX framer */ + cdns_mhdp_reg_write(mhdp, CDNS_DP_SW_RESET, 1); + cdns_mhdp_reg_write(mhdp, CDNS_DP_SW_RESET, 0); + + /* Enable framer */ + /* FIXME: update when MST supported, BIT(2) */ + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, + CDNS_DP_FRAMER_EN | + CDNS_DP_NUM_LANES(mhdp->link.num_lanes) | + CDNS_DP_DISABLE_PHY_RST | + CDNS_DP_WR_FAILING_EDGE_VSYNC | + (!video_mode ? CDNS_DP_NO_VIDEO_MODE : 0)); + + /* Reset PHY config */ + reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1); + if (!(mhdp->host.lanes_cnt & CDNS_SCRAMBLER)) + reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; + cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + + return 0; +err: + /* Reset PHY config */ + reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1); + if (!(mhdp->host.lanes_cnt & CDNS_SCRAMBLER)) + reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; + cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + + drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, + DP_TRAINING_PATTERN_DISABLE); + + return -EIO; +} + +static void cdns_mhdp_disable(struct drm_bridge *bridge) +{ + struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge); + + cdns_mhdp_set_video_status(mhdp, 0); + + drm_dp_link_power_down(&mhdp->aux, &mhdp->link); +} + +static void cdns_mhdp_enable(struct drm_bridge *bridge) +{ + struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge); + struct drm_display_mode *mode; + struct drm_display_info *disp_info = &mhdp->connector.display_info; + enum pixel_format pxlfmt; + int pxlclock; + unsigned int rate, tu_size = 30, vs, vs_f, bpp, required_bandwidth, + available_bandwidth, dp_framer_sp = 0, msa_horizontal_1, + msa_vertical_1, bnd_hsync2vsync, hsync2vsync_pol_ctrl, + misc0 = 0, misc1 = 0, line_thresh = 0, pxl_repr, + front_porch, back_porch, msa_h0, msa_v0, hsync, vsync, + dp_vertical_1, line_thresh1, line_thresh2; + u32 resp; + + unsigned int size = DP_RECEIVER_CAP_SIZE, dp_framer_global_config, + video_mode, training_interval_us; + u8 reg0[size], reg8, amp[2]; + + mode = &bridge->encoder->crtc->state->adjusted_mode; + pxlclock = mode->crtc_clock; + + /* + * Upon power-on reset/device disconnection: [2:0] bits should be 0b001 + * and [7:5] bits 0b000. + */ + drm_dp_dpcd_writeb(&mhdp->aux, DP_SET_POWER, 1); + + drm_dp_link_probe(&mhdp->aux, &mhdp->link); + + dev_dbg(mhdp->dev, "Set sink device power state via DPCD\n"); + drm_dp_link_power_up(&mhdp->aux, &mhdp->link); + /* FIXME (CDNS): do we have to wait for 100ms before going on? */ + mdelay(100); + + mhdp->sink.link_rate = mhdp->link.rate; + mhdp->sink.lanes_cnt = mhdp->link.num_lanes; + mhdp->sink.enhanced = !!(mhdp->link.capabilities & + DP_LINK_CAP_ENHANCED_FRAMING); + + drm_dp_dpcd_read(&mhdp->aux, DP_DPCD_REV, reg0, size); + + mhdp->sink.pattern_supp = CDNS_SUPPORT_TPS(1) | CDNS_SUPPORT_TPS(2); + if (drm_dp_tps3_supported(reg0)) + mhdp->sink.pattern_supp |= CDNS_SUPPORT_TPS(3); + if (drm_dp_tps4_supported(reg0)) + mhdp->sink.pattern_supp |= CDNS_SUPPORT_TPS(4); + + mhdp->sink.fast_link = !!(reg0[DP_MAX_DOWNSPREAD] & + DP_NO_AUX_HANDSHAKE_LINK_TRAINING); + + mhdp->link.rate = max_link_rate(mhdp->host, mhdp->sink); + mhdp->link.num_lanes = min_t(u8, mhdp->sink.lanes_cnt, + mhdp->host.lanes_cnt & GENMASK(2, 0)); + + reg8 = reg0[DP_TRAINING_AUX_RD_INTERVAL] & + DP_TRAINING_AUX_RD_MASK; + switch (reg8) { + case 0: + training_interval_us = 400; + break; + case 1: + case 2: + case 3: + case 4: + training_interval_us = 4000 << (reg8 - 1); + break; + default: + dev_err(mhdp->dev, + "wrong training interval returned by DPCD: %d\n", reg8); + return; + } + + cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); + + dp_framer_global_config = be32_to_cpu(resp); + + video_mode = !(dp_framer_global_config & CDNS_DP_NO_VIDEO_MODE); + + if (dp_framer_global_config & CDNS_DP_FRAMER_EN) + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, + dp_framer_global_config & + ~CDNS_DP_FRAMER_EN); + + /* Spread AMP if required, enable 8b/10b coding */ + amp[0] = (mhdp->host.lanes_cnt & CDNS_SSC) ? DP_SPREAD_AMP_0_5 : 0; + amp[1] = DP_SET_ANSI_8B10B; + drm_dp_dpcd_write(&mhdp->aux, DP_DOWNSPREAD_CTRL, amp, 2); + + if (mhdp->host.fast_link & mhdp->sink.fast_link) { + /* FIXME: implement fastlink */ + dev_dbg(mhdp->dev, "fastlink\n"); + } else { + if (mhdp_link_training(mhdp, video_mode, + training_interval_us)) { + dev_err(mhdp->dev, "Link training failed. Exiting.\n"); + return; + } + } + + rate = mhdp->link.rate / 1000; + + /* FIXME: what about Y_ONLY? how is it handled in the kernel? */ + if (disp_info->color_formats & DRM_COLOR_FORMAT_YCRCB444) + pxlfmt = PIXEL_FORMAT_YCBCR_444; + else if (disp_info->color_formats & DRM_COLOR_FORMAT_YCRCB422) + pxlfmt = PIXEL_FORMAT_YCBCR_422; + else if (disp_info->color_formats & DRM_COLOR_FORMAT_YCRCB420) + pxlfmt = PIXEL_FORMAT_YCBCR_420; + else + pxlfmt = PIXEL_FORMAT_RGB; + + /* if YCBCR supported and stream not SD, use ITU709 */ + /* FIXME: handle ITU version with YCBCR420 when supported */ + if ((pxlfmt == PIXEL_FORMAT_YCBCR_444 || + pxlfmt == PIXEL_FORMAT_YCBCR_422) && mode->crtc_vdisplay >= 720) + misc0 = DP_YCBCR_COEFFICIENTS_ITU709; + + switch (pxlfmt) { + case PIXEL_FORMAT_RGB: + bpp = disp_info->bpc * 3; + pxl_repr = CDNS_DP_FRAMER_RGB << CDNS_DP_FRAMER_PXL_FORMAT; + misc0 |= DP_COLOR_FORMAT_RGB; + break; + case PIXEL_FORMAT_YCBCR_444: + bpp = disp_info->bpc * 3; + pxl_repr = CDNS_DP_FRAMER_YCBCR444 << CDNS_DP_FRAMER_PXL_FORMAT; + misc0 |= DP_COLOR_FORMAT_YCbCr444 | DP_TEST_DYNAMIC_RANGE_CEA; + break; + case PIXEL_FORMAT_YCBCR_422: + bpp = disp_info->bpc * 2; + pxl_repr = CDNS_DP_FRAMER_YCBCR422 << CDNS_DP_FRAMER_PXL_FORMAT; + misc0 |= DP_COLOR_FORMAT_YCbCr422 | DP_TEST_DYNAMIC_RANGE_CEA; + break; + case PIXEL_FORMAT_YCBCR_420: + bpp = disp_info->bpc * 3 / 2; + pxl_repr = CDNS_DP_FRAMER_YCBCR420 << CDNS_DP_FRAMER_PXL_FORMAT; + break; + default: + bpp = disp_info->bpc; + pxl_repr = CDNS_DP_FRAMER_Y_ONLY << CDNS_DP_FRAMER_PXL_FORMAT; + } + + switch (disp_info->bpc) { + case 6: + misc0 |= DP_TEST_BIT_DEPTH_6; + pxl_repr |= CDNS_DP_FRAMER_6_BPC; + break; + case 8: + misc0 |= DP_TEST_BIT_DEPTH_8; + pxl_repr |= CDNS_DP_FRAMER_8_BPC; + break; + case 10: + misc0 |= DP_TEST_BIT_DEPTH_10; + pxl_repr |= CDNS_DP_FRAMER_10_BPC; + break; + case 12: + misc0 |= DP_TEST_BIT_DEPTH_12; + pxl_repr |= CDNS_DP_FRAMER_12_BPC; + break; + case 16: + misc0 |= DP_TEST_BIT_DEPTH_16; + pxl_repr |= CDNS_DP_FRAMER_16_BPC; + break; + } + + /* find optimal tu_size */ + required_bandwidth = pxlclock * bpp / 8; + available_bandwidth = mhdp->link.num_lanes * rate; + do { + tu_size += 2; + + vs_f = tu_size * required_bandwidth / available_bandwidth; + vs = vs_f / 1000; + vs_f = vs_f % 1000; + /* + * FIXME (CDNS): downspreading? + * It's unused is what I've been told. + */ + } while ((vs == 1 || ((vs_f > 850 || vs_f < 100) && vs_f != 0) || + tu_size - vs < 2) && tu_size < 64); + + if (vs > 64) + return; + + bnd_hsync2vsync = CDNS_IP_BYPASS_V_INTERFACE; + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + bnd_hsync2vsync |= CDNS_IP_DET_INTERLACE_FORMAT; + + cdns_mhdp_reg_write(mhdp, CDNS_BND_HSYNC2VSYNC, bnd_hsync2vsync); + + if (mode->flags & DRM_MODE_FLAG_INTERLACE && + mode->flags & DRM_MODE_FLAG_PHSYNC) + hsync2vsync_pol_ctrl = CDNS_H2V_HSYNC_POL_ACTIVE_LOW | + CDNS_H2V_VSYNC_POL_ACTIVE_LOW; + else + hsync2vsync_pol_ctrl = 0; + + cdns_mhdp_reg_write(mhdp, CDNS_HSYNC2VSYNC_POL_CTRL, + hsync2vsync_pol_ctrl); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_TU, + CDNS_DP_FRAMER_TU_VS(vs) | + CDNS_DP_FRAMER_TU_SIZE(tu_size) | + CDNS_DP_FRAMER_TU_CNT_RST_EN); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_PXL_REPR, pxl_repr); + + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + dp_framer_sp |= CDNS_DP_FRAMER_INTERLACE; + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + dp_framer_sp |= CDNS_DP_FRAMER_HSYNC_POL_LOW; + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + dp_framer_sp |= CDNS_DP_FRAMER_VSYNC_POL_LOW; + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_SP, dp_framer_sp); + + front_porch = mode->crtc_hsync_start - mode->crtc_hdisplay; + back_porch = mode->crtc_htotal - mode->crtc_hsync_end; + cdns_mhdp_reg_write(mhdp, CDNS_DP_FRONT_BACK_PORCH, + CDNS_DP_FRONT_PORCH(front_porch) | + CDNS_DP_BACK_PORCH(back_porch)); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_BYTE_COUNT, + mode->crtc_hdisplay * bpp / 8); + + msa_h0 = mode->crtc_htotal - mode->crtc_hsync_start; + cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_0, + CDNS_DP_MSAH0_H_TOTAL(mode->crtc_htotal) | + CDNS_DP_MSAH0_HSYNC_START(msa_h0)); + + hsync = mode->crtc_hsync_end - mode->crtc_hsync_start; + msa_horizontal_1 = CDNS_DP_MSAH1_HSYNC_WIDTH(hsync) | + CDNS_DP_MSAH1_HDISP_WIDTH(mode->crtc_hdisplay); + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + msa_horizontal_1 |= CDNS_DP_MSAH1_HSYNC_POL_LOW; + cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_1, + msa_horizontal_1); + + msa_v0 = mode->crtc_vtotal - mode->crtc_vsync_start; + cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_0, + CDNS_DP_MSAV0_V_TOTAL(mode->crtc_vtotal) | + CDNS_DP_MSAV0_VSYNC_START(msa_v0)); + + vsync = mode->crtc_vsync_end - mode->crtc_vsync_start; + msa_vertical_1 = CDNS_DP_MSAV1_VSYNC_WIDTH(vsync) | + CDNS_DP_MSAV1_VDISP_WIDTH(mode->crtc_vdisplay); + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + msa_vertical_1 |= CDNS_DP_MSAV1_VSYNC_POL_LOW; + cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_1, msa_vertical_1); + + if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && + mode->crtc_vtotal % 2 == 0) + misc1 = DP_TEST_INTERLACED; + if (pxlfmt == PIXEL_FORMAT_Y_ONLY) + misc1 |= CDNS_DP_TEST_COLOR_FORMAT_RAW_Y_ONLY; + /* FIXME: use VSC SDP for Y420 */ + /* FIXME: (CDNS) no code for Y420 in bare metal test */ + if (pxlfmt == PIXEL_FORMAT_YCBCR_420) + misc1 = CDNS_DP_TEST_VSC_SDP; + + cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_MISC, misc0 | (misc1 << 8)); + + /* FIXME: to be changed if MST mode */ + cdns_mhdp_reg_write(mhdp, CDNS_DP_STREAM_CONFIG, 1); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_HORIZONTAL, + CDNS_DP_H_HSYNC_WIDTH(hsync) | + CDNS_DP_H_H_TOTAL(mode->crtc_hdisplay)); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_0, + CDNS_DP_V0_VHEIGHT(mode->crtc_vdisplay) | + CDNS_DP_V0_VSTART(msa_v0)); + + dp_vertical_1 = CDNS_DP_V1_VTOTAL(mode->crtc_vtotal); + if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && + mode->crtc_vtotal % 2 == 0) + dp_vertical_1 |= CDNS_DP_V1_VTOTAL_EVEN; + + cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_1, dp_vertical_1); + + cdns_mhdp_reg_write_bit(mhdp, CDNS_DP_VB_ID, 2, 1, + (mode->flags & DRM_MODE_FLAG_INTERLACE) ? + CDNS_DP_VB_ID_INTERLACED : 0); + + line_thresh1 = ((vs + 1) << 5) * 8 / bpp; + line_thresh2 = (pxlclock << 5) / 1000 / rate * (vs + 1) - (1 << 5); + line_thresh = line_thresh1 - line_thresh2 / mhdp->link.num_lanes; + line_thresh = (line_thresh >> 5) + 2; + cdns_mhdp_reg_write(mhdp, CDNS_DP_LINE_THRESH, + line_thresh & GENMASK(5, 0)); + + cdns_mhdp_reg_write(mhdp, CDNS_DP_RATE_GOVERNOR_STATUS, + CDNS_DP_RG_TU_VS_DIFF((tu_size - vs > 3) ? + 0 : tu_size - vs)); + + cdns_mhdp_set_video_status(mhdp, 1); +} + +static const struct drm_bridge_funcs cdns_mhdp_bridge_funcs = { + .enable = cdns_mhdp_enable, + .disable = cdns_mhdp_disable, + .attach = cdns_mhdp_attach, +}; + +static int load_firmware(struct cdns_mhdp_device *mhdp, const char *name, + unsigned int addr) +{ + const struct firmware *fw; + int ret; + + ret = request_firmware(&fw, name, mhdp->dev); + if (ret) { + dev_err(mhdp->dev, "failed to load firmware (%s), ret: %d\n", + name, ret); + return ret; + } + + memcpy_toio(mhdp->regs + addr, fw->data, fw->size); + + release_firmware(fw); + + return 0; +} + +static int mhdp_probe(struct platform_device *pdev) +{ + struct resource *regs; + struct cdns_mhdp_device *mhdp; + struct clk *clk; + int ret; + unsigned int reg; + unsigned long rate; + + mhdp = devm_kzalloc(&pdev->dev, sizeof(struct cdns_mhdp_device), + GFP_KERNEL); + if (!mhdp) + return -ENOMEM; + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "couldn't get clk: %ld\n", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + mhdp->dev = &pdev->dev; + dev_set_drvdata(&pdev->dev, mhdp); + + drm_dp_aux_init(&mhdp->aux); + mhdp->aux.dev = &pdev->dev; + mhdp->aux.transfer = mhdp_transfer; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mhdp->regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(mhdp->regs)) + return PTR_ERR(mhdp->regs); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 1); + mhdp->dbg_regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(mhdp->dbg_regs)) + return PTR_ERR(mhdp->dbg_regs); + + platform_set_drvdata(pdev, mhdp); + + ret = load_firmware(mhdp, IRAM_FW_NAME, CDNS_MHDP_IMEM); + if (ret) + return ret; + + ret = load_firmware(mhdp, DRAM_FW_NAME, CDNS_MHDP_DMEM); + if (ret) + return ret; + + rate = clk_get_rate(clk); + writel(rate % 1000000, mhdp->regs + CDNS_SW_CLK_L); + writel(rate / 1000000, mhdp->regs + CDNS_SW_CLK_H); + + /* Leave debug mode */ + writel(0, mhdp->regs + CDNS_APB_CTRL); + + /* + * Wait for the KEEP_ALIVE "message" on the first 8 bits. + * Updated each sched "tick" (~2ms) + */ + ret = readl_poll_timeout(mhdp->regs + CDNS_KEEP_ALIVE, reg, + reg & CDNS_KEEP_ALIVE_MASK, 500, + CDNS_KEEP_ALIVE_TIMEOUT); + if (ret) { + dev_err(&pdev->dev, + "device didn't give any life sign: reg %d\n", reg); + return -EIO; + } + + /* + * FIXME (CDNS): how are the characteristics/features of the host + * defined? Will they be always hardcoded? + */ + /* FIXME: link rate 2.7; num_lanes = 2, */ + /* FIXME: read capabilities from PHY */ + mhdp->host.link_rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4); + mhdp->host.lanes_cnt = CDNS_LANE_4 | CDNS_SCRAMBLER; + mhdp->host.volt_swing = CDNS_VOLT_SWING(3); + mhdp->host.pre_emphasis = CDNS_PRE_EMPHASIS(2); + mhdp->host.pattern_supp = CDNS_SUPPORT_TPS(1) | + CDNS_SUPPORT_TPS(2) | CDNS_SUPPORT_TPS(3) | + CDNS_SUPPORT_TPS(4); + mhdp->host.fast_link = 0; + mhdp->host.lane_mapping = CDNS_LANE_MAPPING_FLIPPED; + mhdp->host.enhanced = true; + + mhdp->bridge.of_node = pdev->dev.of_node; + mhdp->bridge.funcs = &cdns_mhdp_bridge_funcs; + + /* Init events to 0 as it's not cleared by FW at boot but on read */ + readl(mhdp->regs + CDNS_SW_EVENT0); + readl(mhdp->regs + CDNS_SW_EVENT1); + readl(mhdp->regs + CDNS_SW_EVENT2); + readl(mhdp->regs + CDNS_SW_EVENT3); + + /* Activate uCPU */ + ret = cdns_mhdp_set_firmware_active(mhdp, true); + if (ret) { + dev_err(mhdp->dev, "Failed to activate DP\n"); + return ret; + } + + /* Loop over HDP change */ + /* + * FIXME: does not work when put in mhdp_bridge_enable. + * Where should we put it? + */ + /* Is it still needed with use of mb message HPD STATUS? */ + ret = readl_poll_timeout(mhdp->regs + CDNS_SW_EVENT0, reg, + reg & CDNS_DPTX_HPD, 500, + CDNS_SW_EVENT0_TIMEOUT); + if (ret) { + dev_err(mhdp->dev, "no HPD received %d\n", reg); + return -ENODEV; + } + + drm_bridge_add(&mhdp->bridge); + + return 0; +} + +MODULE_FIRMWARE(IRAM_FW_NAME); +MODULE_FIRMWARE(DRAM_FW_NAME); + +static int mhdp_remove(struct platform_device *pdev) +{ + struct cdns_mhdp_device *mhdp = dev_get_drvdata(&pdev->dev); + int ret; + + drm_bridge_remove(&mhdp->bridge); + + ret = cdns_mhdp_set_firmware_active(mhdp, false); + if (ret) { + dev_err(mhdp->dev, "Failed to de-activate DP\n"); + return ret; + } + + /* FIXME: check for missing functions */ + + return 0; +} + +static struct platform_driver mhdp_driver = { + .driver = { + .name = "cdns-mhdp", + .of_match_table = of_match_ptr(mhdp_ids), + }, + .probe = mhdp_probe, + .remove = mhdp_remove, +}; +module_platform_driver(mhdp_driver); + +MODULE_AUTHOR("Quentin Schulz quentin.schulz@free-electrons.com"); +MODULE_DESCRIPTION("Cadence MHDP DP bridge driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:cdns-mhdp");

-- 2.17.1

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Damian Kos
Rob Herring