From: CK Hu ck.hu@mediatek.com
This patch add a drm encoder/connector driver for the MIPI DSI function block of the Mediatek display subsystem and a phy driver for the MIPI TX D-PHY control module.
Signed-off-by: Jitao Shi jitao.shi@mediatek.com Signed-off-by: Philipp Zabel p.zabel@pengutronix.de --- Changes since v15: - use div_u64 to avoid "__aeabi_uldivmod undefined" error when building as module --- drivers/gpu/drm/mediatek/Kconfig | 2 + drivers/gpu/drm/mediatek/Makefile | 4 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 + drivers/gpu/drm/mediatek/mtk_drm_drv.h | 2 + drivers/gpu/drm/mediatek/mtk_dsi.c | 927 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 463 ++++++++++++++++ 6 files changed, 1399 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/mediatek/mtk_dsi.c create mode 100644 drivers/gpu/drm/mediatek/mtk_mipi_tx.c
diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig index 30e5371..eeefc97 100644 --- a/drivers/gpu/drm/mediatek/Kconfig +++ b/drivers/gpu/drm/mediatek/Kconfig @@ -4,6 +4,8 @@ config DRM_MEDIATEK depends on ARCH_MEDIATEK || (ARM && COMPILE_TEST) select DRM_GEM_CMA_HELPER select DRM_KMS_HELPER + select DRM_MIPI_DSI + select DRM_PANEL select IOMMU_DMA select MEMORY select MTK_SMI diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile index d4bde7c..e781db5a 100644 --- a/drivers/gpu/drm/mediatek/Makefile +++ b/drivers/gpu/drm/mediatek/Makefile @@ -6,6 +6,8 @@ mediatek-drm-y := mtk_disp_ovl.o \ mtk_drm_drv.o \ mtk_drm_fb.o \ mtk_drm_gem.o \ - mtk_drm_plane.o + mtk_drm_plane.o \ + mtk_dsi.o \ + mtk_mipi_tx.o
obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 4aa09a1..20b178d 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -517,6 +517,8 @@ static struct platform_driver * const mtk_drm_drivers[] = { &mtk_ddp_driver, &mtk_disp_ovl_driver, &mtk_disp_rdma_driver, + &mtk_dsi_driver, + &mtk_mipi_tx_driver, };
static int __init mtk_drm_init(void) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h index 27dc8fa..ac6c92b 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h @@ -53,5 +53,7 @@ struct mtk_drm_private { extern struct platform_driver mtk_ddp_driver; extern struct platform_driver mtk_disp_ovl_driver; extern struct platform_driver mtk_disp_rdma_driver; +extern struct platform_driver mtk_dsi_driver; +extern struct platform_driver mtk_mipi_tx_driver;
#endif /* MTK_DRM_DRV_H */ diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c new file mode 100644 index 0000000..54e8ff5 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -0,0 +1,927 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_graph.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <video/videomode.h> + +#include "mtk_drm_ddp_comp.h" + +#define DSI_VIDEO_FIFO_DEPTH (1920 / 4) +#define DSI_HOST_FIFO_DEPTH 64 + +#define DSI_START 0x00 + +#define DSI_CON_CTRL 0x10 +#define DSI_RESET BIT(0) +#define DSI_EN BIT(1) + +#define DSI_MODE_CTRL 0x14 +#define MODE (3) +#define CMD_MODE 0 +#define SYNC_PULSE_MODE 1 +#define SYNC_EVENT_MODE 2 +#define BURST_MODE 3 +#define FRM_MODE BIT(16) +#define MIX_MODE BIT(17) + +#define DSI_TXRX_CTRL 0x18 +#define VC_NUM (2 << 0) +#define LANE_NUM (0xf << 2) +#define DIS_EOT BIT(6) +#define NULL_EN BIT(7) +#define TE_FREERUN BIT(8) +#define EXT_TE_EN BIT(9) +#define EXT_TE_EDGE BIT(10) +#define MAX_RTN_SIZE (0xf << 12) +#define HSTX_CKLP_EN BIT(16) + +#define DSI_PSCTRL 0x1c +#define DSI_PS_WC 0x3fff +#define DSI_PS_SEL (3 << 16) +#define PACKED_PS_16BIT_RGB565 (0 << 16) +#define LOOSELY_PS_18BIT_RGB666 (1 << 16) +#define PACKED_PS_18BIT_RGB666 (2 << 16) +#define PACKED_PS_24BIT_RGB888 (3 << 16) + +#define DSI_VSA_NL 0x20 +#define DSI_VBP_NL 0x24 +#define DSI_VFP_NL 0x28 +#define DSI_VACT_NL 0x2C +#define DSI_HSA_WC 0x50 +#define DSI_HBP_WC 0x54 +#define DSI_HFP_WC 0x58 + +#define DSI_HSTX_CKL_WC 0x64 + +#define DSI_PHY_LCCON 0x104 +#define LC_HS_TX_EN BIT(0) +#define LC_ULPM_EN BIT(1) +#define LC_WAKEUP_EN BIT(2) + +#define DSI_PHY_LD0CON 0x108 +#define LD0_HS_TX_EN BIT(0) +#define LD0_ULPM_EN BIT(1) +#define LD0_WAKEUP_EN BIT(2) + +#define DSI_PHY_TIMECON0 0x110 +#define LPX (0xff << 0) +#define HS_PRPR (0xff << 8) +#define HS_ZERO (0xff << 16) +#define HS_TRAIL (0xff << 24) + +#define DSI_PHY_TIMECON1 0x114 +#define TA_GO (0xff << 0) +#define TA_SURE (0xff << 8) +#define TA_GET (0xff << 16) +#define DA_HS_EXIT (0xff << 24) + +#define DSI_PHY_TIMECON2 0x118 +#define CONT_DET (0xff << 0) +#define CLK_ZERO (0xff << 16) +#define CLK_TRAIL (0xff << 24) + +#define DSI_PHY_TIMECON3 0x11c +#define CLK_HS_PRPR (0xff << 0) +#define CLK_HS_POST (0xff << 8) +#define CLK_HS_EXIT (0xff << 16) + +#define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0)) + +struct phy; + +struct mtk_dsi { + struct mtk_ddp_comp ddp_comp; + struct device *dev; + struct mipi_dsi_host host; + struct drm_encoder encoder; + struct drm_connector conn; + struct drm_panel *panel; + struct drm_bridge *bridge; + struct phy *phy; + + void __iomem *regs; + + struct clk *engine_clk; + struct clk *digital_clk; + struct clk *hs_clk; + + u32 data_rate; + + unsigned long mode_flags; + enum mipi_dsi_pixel_format format; + unsigned int lanes; + struct videomode vm; + int refcount; + bool enabled; +}; + +static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) +{ + return container_of(e, struct mtk_dsi, encoder); +} + +static inline struct mtk_dsi *connector_to_dsi(struct drm_connector *c) +{ + return container_of(c, struct mtk_dsi, conn); +} + +static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h) +{ + return container_of(h, struct mtk_dsi, host); +} + +static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data) +{ + u32 temp = readl(dsi->regs + offset); + + writel((temp & ~mask) | (data & mask), dsi->regs + offset); +} + +static void dsi_phy_timconfig(struct mtk_dsi *dsi) +{ + u32 timcon0, timcon1, timcon2, timcon3; + unsigned int ui, cycle_time; + unsigned int lpx; + + ui = 1000 / dsi->data_rate + 0x01; + cycle_time = 8000 / dsi->data_rate + 0x01; + lpx = 5; + + timcon0 = (8 << 24) | (0xa << 16) | (0x6 << 8) | lpx; + timcon1 = (7 << 24) | (5 * lpx << 16) | ((3 * lpx) / 2) << 8 | + (4 * lpx); + timcon2 = ((NS_TO_CYCLE(0x64, cycle_time) + 0xa) << 24) | + (NS_TO_CYCLE(0x150, cycle_time) << 16); + timcon3 = (2 * lpx) << 16 | NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8 | + NS_TO_CYCLE(0x40, cycle_time); + + writel(timcon0, dsi->regs + DSI_PHY_TIMECON0); + writel(timcon1, dsi->regs + DSI_PHY_TIMECON1); + writel(timcon2, dsi->regs + DSI_PHY_TIMECON2); + writel(timcon3, dsi->regs + DSI_PHY_TIMECON3); +} + +static void mtk_dsi_enable(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN); +} + +static void mtk_dsi_disable(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0); +} + +static void mtk_dsi_reset(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET); + mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0); +} + +static int mtk_dsi_poweron(struct mtk_dsi *dsi) +{ + struct device *dev = dsi->dev; + int ret; + + if (++dsi->refcount != 1) + return 0; + + /** + * data_rate = (pixel_clock / 1000) * pixel_dipth * mipi_ratio; + * pixel_clock unit is Khz, data_rata unit is MHz, so need divide 1000. + * mipi_ratio is mipi clk coefficient for balance the pixel clk in mipi. + * we set mipi_ratio is 1.05. + */ + dsi->data_rate = dsi->vm.pixelclock * 3 * 21 / (1 * 1000 * 10); + + ret = clk_set_rate(dsi->hs_clk, dsi->data_rate * 1000000); + if (ret < 0) { + dev_err(dev, "Failed to set data rate: %d\n", ret); + goto err_refcount; + } + + phy_power_on(dsi->phy); + + ret = clk_prepare_enable(dsi->engine_clk); + if (ret < 0) { + dev_err(dev, "Failed to enable engine clock: %d\n", ret); + goto err_phy_power_off; + } + + ret = clk_prepare_enable(dsi->digital_clk); + if (ret < 0) { + dev_err(dev, "Failed to enable digital clock: %d\n", ret); + goto err_disable_engine_clk; + } + + mtk_dsi_enable(dsi); + mtk_dsi_reset(dsi); + dsi_phy_timconfig(dsi); + + return 0; + +err_disable_engine_clk: + clk_disable_unprepare(dsi->engine_clk); +err_phy_power_off: + phy_power_off(dsi->phy); +err_refcount: + dsi->refcount--; + return ret; +} + +static void dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0); + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0); +} + +static void dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0); + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN); + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0); +} + +static void dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0); + mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0); +} + +static void dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0); + mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN); + mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0); +} + +static bool dsi_clk_hs_state(struct mtk_dsi *dsi) +{ + u32 tmp_reg1; + + tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON); + return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false; +} + +static void dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter) +{ + if (enter && !dsi_clk_hs_state(dsi)) + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN); + else if (!enter && dsi_clk_hs_state(dsi)) + mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0); +} + +static void dsi_set_mode(struct mtk_dsi *dsi) +{ + u32 vid_mode = CMD_MODE; + + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { + vid_mode = SYNC_PULSE_MODE; + + if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) && + !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)) + vid_mode = BURST_MODE; + } + + writel(vid_mode, dsi->regs + DSI_MODE_CTRL); +} + +static void dsi_ps_control_vact(struct mtk_dsi *dsi) +{ + struct videomode *vm = &dsi->vm; + u32 dsi_buf_bpp, ps_wc; + u32 ps_bpp_mode; + + if (dsi->format == MIPI_DSI_FMT_RGB565) + dsi_buf_bpp = 2; + else + dsi_buf_bpp = 3; + + ps_wc = vm->hactive * dsi_buf_bpp; + ps_bpp_mode = ps_wc; + + switch (dsi->format) { + case MIPI_DSI_FMT_RGB888: + ps_bpp_mode |= PACKED_PS_24BIT_RGB888; + break; + case MIPI_DSI_FMT_RGB666: + ps_bpp_mode |= PACKED_PS_18BIT_RGB666; + break; + case MIPI_DSI_FMT_RGB666_PACKED: + ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666; + break; + case MIPI_DSI_FMT_RGB565: + ps_bpp_mode |= PACKED_PS_16BIT_RGB565; + break; + } + + writel(vm->vactive, dsi->regs + DSI_VACT_NL); + writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL); + writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC); +} + +static void dsi_rxtx_control(struct mtk_dsi *dsi) +{ + u32 tmp_reg; + + switch (dsi->lanes) { + case 1: + tmp_reg = 1 << 2; + break; + case 2: + tmp_reg = 3 << 2; + break; + case 3: + tmp_reg = 7 << 2; + break; + case 4: + tmp_reg = 0xf << 2; + break; + default: + tmp_reg = 0xf << 2; + break; + } + + writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL); +} + +static void dsi_ps_control(struct mtk_dsi *dsi) +{ + unsigned int dsi_tmp_buf_bpp; + u32 tmp_reg; + + switch (dsi->format) { + case MIPI_DSI_FMT_RGB888: + tmp_reg = PACKED_PS_24BIT_RGB888; + dsi_tmp_buf_bpp = 3; + break; + case MIPI_DSI_FMT_RGB666: + tmp_reg = LOOSELY_PS_18BIT_RGB666; + dsi_tmp_buf_bpp = 3; + break; + case MIPI_DSI_FMT_RGB666_PACKED: + tmp_reg = PACKED_PS_18BIT_RGB666; + dsi_tmp_buf_bpp = 3; + break; + case MIPI_DSI_FMT_RGB565: + tmp_reg = PACKED_PS_16BIT_RGB565; + dsi_tmp_buf_bpp = 2; + break; + default: + tmp_reg = PACKED_PS_24BIT_RGB888; + dsi_tmp_buf_bpp = 3; + break; + } + + tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC; + writel(tmp_reg, dsi->regs + DSI_PSCTRL); +} + +static void dsi_config_vdo_timing(struct mtk_dsi *dsi) +{ + unsigned int horizontal_sync_active_byte; + unsigned int horizontal_backporch_byte; + unsigned int horizontal_frontporch_byte; + unsigned int dsi_tmp_buf_bpp; + + struct videomode *vm = &dsi->vm; + + if (dsi->format == MIPI_DSI_FMT_RGB565) + dsi_tmp_buf_bpp = 2; + else + dsi_tmp_buf_bpp = 3; + + writel(vm->vsync_len, dsi->regs + DSI_VSA_NL); + writel(vm->vback_porch, dsi->regs + DSI_VBP_NL); + writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL); + writel(vm->vactive, dsi->regs + DSI_VACT_NL); + + horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10); + + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) + horizontal_backporch_byte = + (vm->hback_porch * dsi_tmp_buf_bpp - 10); + else + horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) * + dsi_tmp_buf_bpp - 10); + + horizontal_frontporch_byte = (vm->hfront_porch * dsi_tmp_buf_bpp - 12); + + writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC); + writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC); + writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC); + + dsi_ps_control(dsi); +} + +static void mtk_dsi_start(struct mtk_dsi *dsi) +{ + writel(0, dsi->regs + DSI_START); + writel(1, dsi->regs + DSI_START); +} + +static void mtk_dsi_poweroff(struct mtk_dsi *dsi) +{ + if (WARN_ON(dsi->refcount == 0)) + return; + + if (--dsi->refcount != 0) + return; + + dsi_lane0_ulp_mode_enter(dsi); + dsi_clk_ulp_mode_enter(dsi); + + mtk_dsi_disable(dsi); + + clk_disable_unprepare(dsi->engine_clk); + clk_disable_unprepare(dsi->digital_clk); + + phy_power_off(dsi->phy); +} + +static void mtk_output_dsi_enable(struct mtk_dsi *dsi) +{ + int ret; + + if (dsi->enabled) + return; + + if (dsi->panel) { + if (drm_panel_prepare(dsi->panel)) { + DRM_ERROR("failed to setup the panel\n"); + return; + } + } + + ret = mtk_dsi_poweron(dsi); + if (ret < 0) { + DRM_ERROR("failed to power on dsi\n"); + return; + } + + dsi_rxtx_control(dsi); + + dsi_clk_ulp_mode_leave(dsi); + dsi_lane0_ulp_mode_leave(dsi); + dsi_clk_hs_mode(dsi, 0); + dsi_set_mode(dsi); + + dsi_ps_control_vact(dsi); + dsi_config_vdo_timing(dsi); + + dsi_set_mode(dsi); + dsi_clk_hs_mode(dsi, 1); + + mtk_dsi_start(dsi); + + dsi->enabled = true; +} + +static void mtk_output_dsi_disable(struct mtk_dsi *dsi) +{ + if (!dsi->enabled) + return; + + if (dsi->panel) { + if (drm_panel_disable(dsi->panel)) { + DRM_ERROR("failed to disable the panel\n"); + return; + } + } + + mtk_dsi_poweroff(dsi); + + dsi->enabled = false; +} + +static void mtk_dsi_encoder_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = { + .destroy = mtk_dsi_encoder_destroy, +}; + +static bool mtk_dsi_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void mtk_dsi_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + struct mtk_dsi *dsi = encoder_to_dsi(encoder); + + dsi->vm.pixelclock = adjusted->clock; + dsi->vm.hactive = adjusted->hdisplay; + dsi->vm.hback_porch = adjusted->htotal - adjusted->hsync_end; + dsi->vm.hfront_porch = adjusted->hsync_start - adjusted->hdisplay; + dsi->vm.hsync_len = adjusted->hsync_end - adjusted->hsync_start; + + dsi->vm.vactive = adjusted->vdisplay; + dsi->vm.vback_porch = adjusted->vtotal - adjusted->vsync_end; + dsi->vm.vfront_porch = adjusted->vsync_start - adjusted->vdisplay; + dsi->vm.vsync_len = adjusted->vsync_end - adjusted->vsync_start; +} + +static void mtk_dsi_encoder_disable(struct drm_encoder *encoder) +{ + struct mtk_dsi *dsi = encoder_to_dsi(encoder); + + mtk_output_dsi_disable(dsi); +} + +static void mtk_dsi_encoder_enable(struct drm_encoder *encoder) +{ + struct mtk_dsi *dsi = encoder_to_dsi(encoder); + + mtk_output_dsi_enable(dsi); +} + +static enum drm_connector_status mtk_dsi_connector_detect( + struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static void mtk_dsi_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static int mtk_dsi_connector_get_modes(struct drm_connector *connector) +{ + struct mtk_dsi *dsi = connector_to_dsi(connector); + + return drm_panel_get_modes(dsi->panel); +} + +static struct drm_encoder *mtk_dsi_connector_best_encoder( + struct drm_connector *connector) +{ + struct mtk_dsi *dsi = connector_to_dsi(connector); + + return &dsi->encoder; +} + +static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = { + .mode_fixup = mtk_dsi_encoder_mode_fixup, + .mode_set = mtk_dsi_encoder_mode_set, + .disable = mtk_dsi_encoder_disable, + .enable = mtk_dsi_encoder_enable, +}; + +static const struct drm_connector_funcs mtk_dsi_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = mtk_dsi_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = mtk_dsi_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_connector_helper_funcs + mtk_dsi_connector_helper_funcs = { + .get_modes = mtk_dsi_connector_get_modes, + .best_encoder = mtk_dsi_connector_best_encoder, +}; + +static int mtk_drm_attach_bridge(struct drm_bridge *bridge, + struct drm_encoder *encoder) +{ + int ret; + + if (!bridge) + return -ENOENT; + + encoder->bridge = bridge; + bridge->encoder = encoder; + ret = drm_bridge_attach(encoder->dev, bridge); + if (ret) { + DRM_ERROR("Failed to attach bridge to drm\n"); + encoder->bridge = NULL; + bridge->encoder = NULL; + } + + return ret; +} + +static int mtk_dsi_create_connector(struct drm_device *drm, struct mtk_dsi *dsi) +{ + int ret; + + ret = drm_connector_init(drm, &dsi->conn, &mtk_dsi_connector_funcs, + DRM_MODE_CONNECTOR_DSI); + if (ret) { + DRM_ERROR("Failed to connector init to drm\n"); + return ret; + } + + drm_connector_helper_add(&dsi->conn, &mtk_dsi_connector_helper_funcs); + + ret = drm_connector_register(&dsi->conn); + if (ret) { + DRM_ERROR("Failed to connector register to drm\n"); + goto err_connector_cleanup; + } + + dsi->conn.dpms = DRM_MODE_DPMS_OFF; + drm_mode_connector_attach_encoder(&dsi->conn, &dsi->encoder); + + if (dsi->panel) { + ret = drm_panel_attach(dsi->panel, &dsi->conn); + if (ret) { + DRM_ERROR("Failed to attach panel to drm\n"); + goto err_connector_unregister; + } + } + + return 0; + +err_connector_unregister: + drm_connector_unregister(&dsi->conn); +err_connector_cleanup: + drm_connector_cleanup(&dsi->conn); + return ret; +} + +static int mtk_dsi_create_conn_enc(struct drm_device *drm, struct mtk_dsi *dsi) +{ + int ret; + + ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs, + DRM_MODE_ENCODER_DSI, NULL); + if (ret) { + DRM_ERROR("Failed to encoder init to drm\n"); + return ret; + } + drm_encoder_helper_add(&dsi->encoder, &mtk_dsi_encoder_helper_funcs); + + /* + * Currently display data paths are statically assigned to a crtc each. + * crtc 0 is OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 + */ + dsi->encoder.possible_crtcs = 1; + + /* If there's a bridge, attach to it and let it create the connector */ + ret = mtk_drm_attach_bridge(dsi->bridge, &dsi->encoder); + if (ret) { + /* Otherwise create our own connector and attach to a panel */ + ret = mtk_dsi_create_connector(drm, dsi); + if (ret) + goto err_encoder_cleanup; + } + + return 0; + +err_encoder_cleanup: + drm_encoder_cleanup(&dsi->encoder); + return ret; +} + +static void mtk_dsi_destroy_conn_enc(struct mtk_dsi *dsi) +{ + drm_encoder_cleanup(&dsi->encoder); + /* Skip connector cleanup if creation was delegated to the bridge */ + if (dsi->conn.dev) { + drm_connector_unregister(&dsi->conn); + drm_connector_cleanup(&dsi->conn); + } +} + +static void mtk_dsi_ddp_start(struct mtk_ddp_comp *comp) +{ + struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp); + + mtk_dsi_poweron(dsi); +} + +static void mtk_dsi_ddp_stop(struct mtk_ddp_comp *comp) +{ + struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp); + + mtk_dsi_poweroff(dsi); +} + +static const struct mtk_ddp_comp_funcs mtk_dsi_funcs = { + .start = mtk_dsi_ddp_start, + .stop = mtk_dsi_ddp_stop, +}; + +static int mtk_dsi_host_attach(struct mipi_dsi_host *host, + struct mipi_dsi_device *device) +{ + struct mtk_dsi *dsi = host_to_dsi(host); + + dsi->lanes = device->lanes; + dsi->format = device->format; + dsi->mode_flags = device->mode_flags; + + if (dsi->conn.dev) + drm_helper_hpd_irq_event(dsi->conn.dev); + + return 0; +} + +static int mtk_dsi_host_detach(struct mipi_dsi_host *host, + struct mipi_dsi_device *device) +{ + struct mtk_dsi *dsi = host_to_dsi(host); + + if (dsi->conn.dev) + drm_helper_hpd_irq_event(dsi->conn.dev); + + return 0; +} + +static const struct mipi_dsi_host_ops mtk_dsi_ops = { + .attach = mtk_dsi_host_attach, + .detach = mtk_dsi_host_detach, +}; + +static int mtk_dsi_bind(struct device *dev, struct device *master, void *data) +{ + int ret; + struct drm_device *drm = data; + struct mtk_dsi *dsi = dev_get_drvdata(dev); + + ret = mtk_ddp_comp_register(drm, &dsi->ddp_comp); + if (ret < 0) { + dev_err(dev, "Failed to register component %s: %d\n", + dev->of_node->full_name, ret); + return ret; + } + + ret = mipi_dsi_host_register(&dsi->host); + if (ret < 0) { + dev_err(dev, "failed to register DSI host: %d\n", ret); + goto err_ddp_comp_unregister; + } + + ret = mtk_dsi_create_conn_enc(drm, dsi); + if (ret) { + DRM_ERROR("Encoder create failed with %d\n", ret); + goto err_unregister; + } + + return 0; + +err_unregister: + mipi_dsi_host_unregister(&dsi->host); +err_ddp_comp_unregister: + mtk_ddp_comp_unregister(drm, &dsi->ddp_comp); + return ret; +} + +static void mtk_dsi_unbind(struct device *dev, struct device *master, + void *data) +{ + struct drm_device *drm = data; + struct mtk_dsi *dsi = dev_get_drvdata(dev); + + mtk_dsi_destroy_conn_enc(dsi); + mipi_dsi_host_unregister(&dsi->host); + mtk_ddp_comp_unregister(drm, &dsi->ddp_comp); +} + +static const struct component_ops mtk_dsi_component_ops = { + .bind = mtk_dsi_bind, + .unbind = mtk_dsi_unbind, +}; + +static int mtk_dsi_probe(struct platform_device *pdev) +{ + struct mtk_dsi *dsi; + struct device *dev = &pdev->dev; + struct device_node *remote_node, *endpoint; + struct resource *regs; + int comp_id; + int ret; + + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); + if (!dsi) + return -ENOMEM; + + dsi->host.ops = &mtk_dsi_ops; + dsi->host.dev = dev; + + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (endpoint) { + remote_node = of_graph_get_remote_port_parent(endpoint); + if (!remote_node) { + dev_err(dev, "No panel connected\n"); + return -ENODEV; + } + + dsi->bridge = of_drm_find_bridge(remote_node); + dsi->panel = of_drm_find_panel(remote_node); + of_node_put(remote_node); + if (!dsi->bridge && !dsi->panel) { + dev_info(dev, "Waiting for bridge or panel driver\n"); + return -EPROBE_DEFER; + } + } + + dsi->engine_clk = devm_clk_get(dev, "engine"); + if (IS_ERR(dsi->engine_clk)) { + ret = PTR_ERR(dsi->engine_clk); + dev_err(dev, "Failed to get engine clock: %d\n", ret); + return ret; + } + + dsi->digital_clk = devm_clk_get(dev, "digital"); + if (IS_ERR(dsi->digital_clk)) { + ret = PTR_ERR(dsi->digital_clk); + dev_err(dev, "Failed to get digital clock: %d\n", ret); + return ret; + } + + dsi->hs_clk = devm_clk_get(dev, "hs"); + if (IS_ERR(dsi->hs_clk)) { + ret = PTR_ERR(dsi->hs_clk); + dev_err(dev, "Failed to get hs clock: %d\n", ret); + return ret; + } + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dsi->regs = devm_ioremap_resource(dev, regs); + if (IS_ERR(dsi->regs)) { + ret = PTR_ERR(dsi->regs); + dev_err(dev, "Failed to ioremap memory: %d\n", ret); + return ret; + } + + dsi->phy = devm_phy_get(dev, "dphy"); + if (IS_ERR(dsi->phy)) { + ret = PTR_ERR(dsi->phy); + dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret); + return ret; + } + + comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI); + if (comp_id < 0) { + dev_err(dev, "Failed to identify by alias: %d\n", comp_id); + return comp_id; + } + + ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id, + &mtk_dsi_funcs); + if (ret) { + dev_err(dev, "Failed to initialize component: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, dsi); + + return component_add(&pdev->dev, &mtk_dsi_component_ops); +} + +static int mtk_dsi_remove(struct platform_device *pdev) +{ + struct mtk_dsi *dsi = platform_get_drvdata(pdev); + + mtk_output_dsi_disable(dsi); + component_del(&pdev->dev, &mtk_dsi_component_ops); + + return 0; +} + +static const struct of_device_id mtk_dsi_of_match[] = { + { .compatible = "mediatek,mt8173-dsi" }, + { }, +}; + +struct platform_driver mtk_dsi_driver = { + .probe = mtk_dsi_probe, + .remove = mtk_dsi_remove, + .driver = { + .name = "mtk-dsi", + .of_match_table = mtk_dsi_of_match, + }, +}; diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c new file mode 100644 index 0000000..cf8f38d --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c @@ -0,0 +1,463 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/phy/phy.h> + +#define MIPITX_DSI_CON 0x00 +#define RG_DSI_LDOCORE_EN BIT(0) +#define RG_DSI_CKG_LDOOUT_EN BIT(1) +#define RG_DSI_BCLK_SEL (3 << 2) +#define RG_DSI_LD_IDX_SEL (7 << 4) +#define RG_DSI_PHYCLK_SEL (2 << 8) +#define RG_DSI_DSICLK_FREQ_SEL BIT(10) +#define RG_DSI_LPTX_CLMP_EN BIT(11) + +#define MIPITX_DSI_CLOCK_LANE 0x04 +#define MIPITX_DSI_DATA_LANE0 0x08 +#define MIPITX_DSI_DATA_LANE1 0x0c +#define MIPITX_DSI_DATA_LANE2 0x10 +#define MIPITX_DSI_DATA_LANE3 0x14 +#define RG_DSI_LNTx_LDOOUT_EN BIT(0) +#define RG_DSI_LNTx_CKLANE_EN BIT(1) +#define RG_DSI_LNTx_LPTX_IPLUS1 BIT(2) +#define RG_DSI_LNTx_LPTX_IPLUS2 BIT(3) +#define RG_DSI_LNTx_LPTX_IMINUS BIT(4) +#define RG_DSI_LNTx_LPCD_IPLUS BIT(5) +#define RG_DSI_LNTx_LPCD_IMINUS BIT(6) +#define RG_DSI_LNTx_RT_CODE (0xf << 8) + +#define MIPITX_DSI_TOP_CON 0x40 +#define RG_DSI_LNT_INTR_EN BIT(0) +#define RG_DSI_LNT_HS_BIAS_EN BIT(1) +#define RG_DSI_LNT_IMP_CAL_EN BIT(2) +#define RG_DSI_LNT_TESTMODE_EN BIT(3) +#define RG_DSI_LNT_IMP_CAL_CODE (0xf << 4) +#define RG_DSI_LNT_AIO_SEL (7 << 8) +#define RG_DSI_PAD_TIE_LOW_EN BIT(11) +#define RG_DSI_DEBUG_INPUT_EN BIT(12) +#define RG_DSI_PRESERVE (7 << 13) + +#define MIPITX_DSI_BG_CON 0x44 +#define RG_DSI_BG_CORE_EN BIT(0) +#define RG_DSI_BG_CKEN BIT(1) +#define RG_DSI_BG_DIV (0x3 << 2) +#define RG_DSI_BG_FAST_CHARGE BIT(4) +#define RG_DSI_VOUT_MSK (0x3ffff << 5) +#define RG_DSI_V12_SEL (7 << 5) +#define RG_DSI_V10_SEL (7 << 8) +#define RG_DSI_V072_SEL (7 << 11) +#define RG_DSI_V04_SEL (7 << 14) +#define RG_DSI_V032_SEL (7 << 17) +#define RG_DSI_V02_SEL (7 << 20) +#define RG_DSI_BG_R1_TRIM (0xf << 24) +#define RG_DSI_BG_R2_TRIM (0xf << 28) + +#define MIPITX_DSI_PLL_CON0 0x50 +#define RG_DSI_MPPLL_PLL_EN BIT(0) +#define RG_DSI_MPPLL_DIV_MSK (0x1ff << 1) +#define RG_DSI_MPPLL_PREDIV (3 << 1) +#define RG_DSI_MPPLL_TXDIV0 (3 << 3) +#define RG_DSI_MPPLL_TXDIV1 (3 << 5) +#define RG_DSI_MPPLL_POSDIV (7 << 7) +#define RG_DSI_MPPLL_MONVC_EN BIT(10) +#define RG_DSI_MPPLL_MONREF_EN BIT(11) +#define RG_DSI_MPPLL_VOD_EN BIT(12) + +#define MIPITX_DSI_PLL_CON1 0x54 +#define RG_DSI_MPPLL_SDM_FRA_EN BIT(0) +#define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1) +#define RG_DSI_MPPLL_SDM_SSC_EN BIT(2) +#define RG_DSI_MPPLL_SDM_SSC_PRD (0xffff << 16) + +#define MIPITX_DSI_PLL_CON2 0x58 + +#define MIPITX_DSI_PLL_PWR 0x68 +#define RG_DSI_MPPLL_SDM_PWR_ON BIT(0) +#define RG_DSI_MPPLL_SDM_ISO_EN BIT(1) +#define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8) + +#define MIPITX_DSI_SW_CTRL 0x80 +#define SW_CTRL_EN BIT(0) + +#define MIPITX_DSI_SW_CTRL_CON0 0x84 +#define SW_LNTC_LPTX_PRE_OE BIT(0) +#define SW_LNTC_LPTX_OE BIT(1) +#define SW_LNTC_LPTX_P BIT(2) +#define SW_LNTC_LPTX_N BIT(3) +#define SW_LNTC_HSTX_PRE_OE BIT(4) +#define SW_LNTC_HSTX_OE BIT(5) +#define SW_LNTC_HSTX_ZEROCLK BIT(6) +#define SW_LNT0_LPTX_PRE_OE BIT(7) +#define SW_LNT0_LPTX_OE BIT(8) +#define SW_LNT0_LPTX_P BIT(9) +#define SW_LNT0_LPTX_N BIT(10) +#define SW_LNT0_HSTX_PRE_OE BIT(11) +#define SW_LNT0_HSTX_OE BIT(12) +#define SW_LNT0_LPRX_EN BIT(13) +#define SW_LNT1_LPTX_PRE_OE BIT(14) +#define SW_LNT1_LPTX_OE BIT(15) +#define SW_LNT1_LPTX_P BIT(16) +#define SW_LNT1_LPTX_N BIT(17) +#define SW_LNT1_HSTX_PRE_OE BIT(18) +#define SW_LNT1_HSTX_OE BIT(19) +#define SW_LNT2_LPTX_PRE_OE BIT(20) +#define SW_LNT2_LPTX_OE BIT(21) +#define SW_LNT2_LPTX_P BIT(22) +#define SW_LNT2_LPTX_N BIT(23) +#define SW_LNT2_HSTX_PRE_OE BIT(24) +#define SW_LNT2_HSTX_OE BIT(25) + +struct mtk_mipi_tx { + struct device *dev; + void __iomem *regs; + unsigned int data_rate; + struct clk_hw pll_hw; + struct clk *pll; +}; + +static inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw) +{ + return container_of(hw, struct mtk_mipi_tx, pll_hw); +} + +static void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, + u32 bits) +{ + u32 temp = readl(mipi_tx->regs + offset); + + writel(temp & ~bits, mipi_tx->regs + offset); +} + +static void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, + u32 bits) +{ + u32 temp = readl(mipi_tx->regs + offset); + + writel(temp | bits, mipi_tx->regs + offset); +} + +static void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, + u32 mask, u32 data) +{ + u32 temp = readl(mipi_tx->regs + offset); + + writel((temp & ~mask) | (data & mask), mipi_tx->regs + offset); +} + +static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw) +{ + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); + unsigned int txdiv, txdiv0, txdiv1; + u64 pcw; + + dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate); + + if (mipi_tx->data_rate >= 500000000) { + txdiv = 1; + txdiv0 = 0; + txdiv1 = 0; + } else if (mipi_tx->data_rate >= 250000000) { + txdiv = 2; + txdiv0 = 1; + txdiv1 = 0; + } else if (mipi_tx->data_rate >= 125000000) { + txdiv = 4; + txdiv0 = 2; + txdiv1 = 0; + } else if (mipi_tx->data_rate > 62000000) { + txdiv = 8; + txdiv0 = 2; + txdiv1 = 1; + } else if (mipi_tx->data_rate >= 50000000) { + txdiv = 16; + txdiv0 = 2; + txdiv1 = 2; + } else { + return -EINVAL; + } + + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON, + RG_DSI_VOUT_MSK | + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN, + (4 << 20) | (4 << 17) | (4 << 14) | + (4 << 11) | (4 << 8) | (4 << 5) | + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN); + + usleep_range(30, 100); + + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON, + RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN, + (8 << 4) | RG_DSI_LNT_HS_BIAS_EN); + + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON, + RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN); + + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR, + RG_DSI_MPPLL_SDM_PWR_ON | + RG_DSI_MPPLL_SDM_ISO_EN, + RG_DSI_MPPLL_SDM_PWR_ON); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, + RG_DSI_MPPLL_PLL_EN); + + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0, + RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 | + RG_DSI_MPPLL_PREDIV, + (txdiv0 << 3) | (txdiv1 << 5)); + + /* + * PLL PCW config + * PCW bit 24~30 = integer part of pcw + * PCW bit 0~23 = fractional part of pcw + * pcw = data_Rate*4*txdiv/(Ref_clk*2); + * Post DIV =4, so need data_Rate*4 + * Ref_clk is 26MHz + */ + pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24, + 26000000); + writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2); + + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1, + RG_DSI_MPPLL_SDM_FRA_EN); + + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN); + + usleep_range(20, 100); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1, + RG_DSI_MPPLL_SDM_SSC_EN); + + return 0; +} + +static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw) +{ + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); + + dev_dbg(mipi_tx->dev, "unprepare\n"); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, + RG_DSI_MPPLL_PLL_EN); + + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR, + RG_DSI_MPPLL_SDM_ISO_EN | + RG_DSI_MPPLL_SDM_PWR_ON, + RG_DSI_MPPLL_SDM_ISO_EN); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON, + RG_DSI_LNT_HS_BIAS_EN); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON, + RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON, + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, + RG_DSI_MPPLL_DIV_MSK); +} + +static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + return clamp_val(rate, 50000000, 1250000000); +} + +static int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); + + dev_dbg(mipi_tx->dev, "set rate: %lu Hz\n", rate); + + mipi_tx->data_rate = rate; + + return 0; +} + +static unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); + + return mipi_tx->data_rate; +} + +static const struct clk_ops mtk_mipi_tx_pll_ops = { + .prepare = mtk_mipi_tx_pll_prepare, + .unprepare = mtk_mipi_tx_pll_unprepare, + .round_rate = mtk_mipi_tx_pll_round_rate, + .set_rate = mtk_mipi_tx_pll_set_rate, + .recalc_rate = mtk_mipi_tx_pll_recalc_rate, +}; + +static int mtk_mipi_tx_power_on_signal(struct phy *phy) +{ + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); + unsigned int reg; + + for (reg = MIPITX_DSI_CLOCK_LANE; + reg <= MIPITX_DSI_DATA_LANE3; reg += 4) + mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN); + + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON, + RG_DSI_PAD_TIE_LOW_EN); + + return 0; +} + +static int mtk_mipi_tx_power_on(struct phy *phy) +{ + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); + int ret; + + /* Power up core and enable PLL */ + ret = clk_prepare_enable(mipi_tx->pll); + if (ret < 0) + return ret; + + /* Enable DSI Lane LDO outputs, disable pad tie low */ + mtk_mipi_tx_power_on_signal(phy); + + return 0; +} + +static void mtk_mipi_tx_power_off_signal(struct phy *phy) +{ + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); + unsigned int reg; + + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON, + RG_DSI_PAD_TIE_LOW_EN); + + for (reg = MIPITX_DSI_CLOCK_LANE; + reg <= MIPITX_DSI_DATA_LANE3; reg += 4) + mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN); +} + +static int mtk_mipi_tx_power_off(struct phy *phy) +{ + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); + + /* Enable pad tie low, disable DSI Lane LDO outputs */ + mtk_mipi_tx_power_off_signal(phy); + + /* Disable PLL and power down core */ + clk_disable_unprepare(mipi_tx->pll); + + return 0; +} + +static const struct phy_ops mtk_mipi_tx_ops = { + .power_on = mtk_mipi_tx_power_on, + .power_off = mtk_mipi_tx_power_off, + .owner = THIS_MODULE, +}; + +static int mtk_mipi_tx_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_mipi_tx *mipi_tx; + struct resource *mem; + struct clk *ref_clk; + const char *ref_clk_name; + struct clk_init_data clk_init = { + .ops = &mtk_mipi_tx_pll_ops, + .num_parents = 1, + .parent_names = (const char * const *)&ref_clk_name, + .flags = CLK_SET_RATE_GATE, + }; + struct phy *phy; + struct phy_provider *phy_provider; + int ret; + + mipi_tx = devm_kzalloc(dev, sizeof(*mipi_tx), GFP_KERNEL); + if (!mipi_tx) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mipi_tx->regs = devm_ioremap_resource(dev, mem); + if (IS_ERR(mipi_tx->regs)) { + ret = PTR_ERR(mipi_tx->regs); + dev_err(dev, "Failed to get memory resource: %d\n", ret); + return ret; + } + + ref_clk = devm_clk_get(dev, NULL); + if (IS_ERR(ref_clk)) { + ret = PTR_ERR(ref_clk); + dev_err(dev, "Failed to get reference clock: %d\n", ret); + return ret; + } + ref_clk_name = __clk_get_name(ref_clk); + + ret = of_property_read_string(dev->of_node, "clock-output-names", + &clk_init.name); + if (ret < 0) { + dev_err(dev, "Failed to read clock-output-names: %d\n", ret); + return ret; + } + + mipi_tx->pll_hw.init = &clk_init; + mipi_tx->pll = devm_clk_register(dev, &mipi_tx->pll_hw); + if (IS_ERR(mipi_tx->pll)) { + ret = PTR_ERR(mipi_tx->pll); + dev_err(dev, "Failed to register PLL: %d\n", ret); + return ret; + } + + phy = devm_phy_create(dev, NULL, &mtk_mipi_tx_ops); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy); + dev_err(dev, "Failed to create MIPI D-PHY: %d\n", ret); + return ret; + } + phy_set_drvdata(phy, mipi_tx); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy_provider); + return ret; + } + + mipi_tx->dev = dev; + + return of_clk_add_provider(dev->of_node, of_clk_src_simple_get, + mipi_tx->pll); +} + +static int mtk_mipi_tx_remove(struct platform_device *pdev) +{ + of_clk_del_provider(pdev->dev.of_node); + return 0; +} + +static const struct of_device_id mtk_mipi_tx_match[] = { + { .compatible = "mediatek,mt8173-mipi-tx", }, + {}, +}; + +struct platform_driver mtk_mipi_tx_driver = { + .probe = mtk_mipi_tx_probe, + .remove = mtk_mipi_tx_remove, + .driver = { + .name = "mediatek-mipi-tx", + .of_match_table = mtk_mipi_tx_match, + }, +};