drivers/gpu/drm/rockchip/analogix_dp-rockchip.c - arm/linux - Git at Google

 /*
  * Rockchip SoC DP (Display Port) interface driver.
  *
  * Copyright (C) Fuzhou Rockchip Electronics Co., Ltd.
  * Author: Andy Yan <andy.yan@rock-chips.com>
  *         Yakir Yang <ykk@rock-chips.com>
  *         Jeff Chen <jeff.chen@rock-chips.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.
  */

 #include <linux/component.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/clk.h>

 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>

 #include <video/of_videomode.h>
 #include <video/videomode.h>

 #include <drm/bridge/analogix_dp.h>

 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_psr.h"
 #include "rockchip_drm_vop.h"

 #define RK3288_GRF_SOC_CON6		0x25c
 #define RK3288_EDP_LCDC_SEL		BIT(5)
 #define RK3399_GRF_SOC_CON20		0x6250
 #define RK3399_EDP_LCDC_SEL		BIT(5)

 #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)

 #define PSR_WAIT_LINE_FLAG_TIMEOUT_MS	100

 #define to_dp(nm)	container_of(nm, struct rockchip_dp_device, nm)

 /**
  * struct rockchip_dp_chip_data - splite the grf setting of kind of chips
  * @lcdsel_grf_reg: grf register offset of lcdc select
  * @lcdsel_big: reg value of selecting vop big for eDP
  * @lcdsel_lit: reg value of selecting vop little for eDP
  * @chip_type: specific chip type
  */
 struct rockchip_dp_chip_data {
 	u32	lcdsel_grf_reg;
 	u32	lcdsel_big;
 	u32	lcdsel_lit;
 	u32	chip_type;
 };

 struct rockchip_dp_device {
 	struct drm_device        *drm_dev;
 	struct device            *dev;
 	struct drm_encoder       encoder;
 	struct drm_display_mode  mode;

 	struct clk               *pclk;
 	struct clk               *grfclk;
 	struct regmap            *grf;
 	struct reset_control     *rst;

 	struct work_struct	 psr_work;
 	spinlock_t		 psr_lock;
 	unsigned int             psr_state;

 	const struct rockchip_dp_chip_data *data;

 	struct analogix_dp_plat_data plat_data;
 };

 static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
 {
 	struct rockchip_dp_device *dp = to_dp(encoder);
 	unsigned long flags;

 	if (!analogix_dp_psr_supported(dp->dev))
 		return;

 	dev_dbg(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");

 	spin_lock_irqsave(&dp->psr_lock, flags);
 	if (enabled)
 		dp->psr_state = EDP_VSC_PSR_STATE_ACTIVE;
 	else
 		dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;

 	schedule_work(&dp->psr_work);
 	spin_unlock_irqrestore(&dp->psr_lock, flags);
 }

 static void analogix_dp_psr_work(struct work_struct *work)
 {
 	struct rockchip_dp_device *dp =
 				container_of(work, typeof(*dp), psr_work);
 	struct drm_crtc *crtc = dp->encoder.crtc;
 	int psr_state = dp->psr_state;
 	int vact_end;
 	int ret;
 	unsigned long flags;

 	if (!crtc)
 		return;

 	vact_end = crtc->mode.vtotal - crtc->mode.vsync_start + crtc->mode.vdisplay;

 	ret = rockchip_drm_wait_line_flag(dp->encoder.crtc, vact_end,
 					  PSR_WAIT_LINE_FLAG_TIMEOUT_MS);
 	if (ret) {
 		dev_err(dp->dev, "line flag interrupt did not arrive\n");
 		return;
 	}

 	spin_lock_irqsave(&dp->psr_lock, flags);
 	if (psr_state == EDP_VSC_PSR_STATE_ACTIVE)
 		analogix_dp_enable_psr(dp->dev);
 	else
 		analogix_dp_disable_psr(dp->dev);
 	spin_unlock_irqrestore(&dp->psr_lock, flags);
 }

 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
 {
 	reset_control_assert(dp->rst);
 	usleep_range(10, 20);
 	reset_control_deassert(dp->rst);

 	return 0;
 }

 static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
 {
 	struct rockchip_dp_device *dp = to_dp(plat_data);
 	int ret;

 	cancel_work_sync(&dp->psr_work);

 	ret = clk_prepare_enable(dp->pclk);
 	if (ret < 0) {
 		dev_err(dp->dev, "failed to enable pclk %d\n", ret);
 		return ret;
 	}

 	ret = rockchip_dp_pre_init(dp);
 	if (ret < 0) {
 		dev_err(dp->dev, "failed to dp pre init %d\n", ret);
 		clk_disable_unprepare(dp->pclk);
 		return ret;
 	}

 	return 0;
 }

 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 {
 	struct rockchip_dp_device *dp = to_dp(plat_data);

 	clk_disable_unprepare(dp->pclk);

 	return 0;
 }

 static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
 				 struct drm_connector *connector)
 {
 	struct drm_display_info *di = &connector->display_info;
 	/* VOP couldn't output YUV video format for eDP rightly */
 	u32 mask = DRM_COLOR_FORMAT_YCRCB444 | DRM_COLOR_FORMAT_YCRCB422;

 	if ((di->color_formats & mask)) {
 		DRM_DEBUG_KMS("Swapping display color format from YUV to RGB\n");
 		di->color_formats &= ~mask;
 		di->color_formats |= DRM_COLOR_FORMAT_RGB444;
 		di->bpc = 8;
 	}

 	return 0;
 }

 static bool
 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 				   const struct drm_display_mode *mode,
 				   struct drm_display_mode *adjusted_mode)
 {
 	/* do nothing */
 	return true;
 }

 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
 					     struct drm_display_mode *mode,
 					     struct drm_display_mode *adjusted)
 {
 	/* do nothing */
 }

 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
 {
 	struct rockchip_dp_device *dp = to_dp(encoder);
 	int ret;
 	u32 val;

 	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
 	if (ret < 0)
 		return;

 	if (ret)
 		val = dp->data->lcdsel_lit;
 	else
 		val = dp->data->lcdsel_big;

 	dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");

 	ret = clk_prepare_enable(dp->grfclk);
 	if (ret < 0) {
 		dev_err(dp->dev, "failed to enable grfclk %d\n", ret);
 		return;
 	}

 	ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
 	if (ret != 0)
 		dev_err(dp->dev, "Could not write to GRF: %d\n", ret);

 	clk_disable_unprepare(dp->grfclk);
 }

 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
 {
 	/* do nothing */
 }

 static int
 rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
 				      struct drm_crtc_state *crtc_state,
 				      struct drm_connector_state *conn_state)
 {
 	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 	struct rockchip_dp_device *dp = to_dp(encoder);
 	int ret;

 	/*
 	 * The hardware IC designed that VOP must output the RGB10 video
 	 * format to eDP controller, and if eDP panel only support RGB8,
 	 * then eDP controller should cut down the video data, not via VOP
 	 * controller, that's why we need to hardcode the VOP output mode
 	 * to RGA10 here.
 	 */

 	s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 	s->output_type = DRM_MODE_CONNECTOR_eDP;
 	if (dp->data->chip_type == RK3399_EDP) {
 		/*
 		 * For RK3399, VOP Lit must code the out mode to RGB888,
 		 * VOP Big must code the out mode to RGB10.
 		 */
 		ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node,
 							encoder);
 		if (ret > 0)
 			s->output_mode = ROCKCHIP_OUT_MODE_P888;
 	}

 	return 0;
 }

 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
 	.mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
 	.mode_set = rockchip_dp_drm_encoder_mode_set,
 	.enable = rockchip_dp_drm_encoder_enable,
 	.disable = rockchip_dp_drm_encoder_nop,
 	.atomic_check = rockchip_dp_drm_encoder_atomic_check,
 };

 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
 }

 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
 	.destroy = rockchip_dp_drm_encoder_destroy,
 };

 static int rockchip_dp_init(struct rockchip_dp_device *dp)
 {
 	struct device *dev = dp->dev;
 	struct device_node *np = dev->of_node;
 	int ret;

 	dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 	if (IS_ERR(dp->grf)) {
 		dev_err(dev, "failed to get rockchip,grf property\n");
 		return PTR_ERR(dp->grf);
 	}

 	dp->grfclk = devm_clk_get(dev, "grf");
 	if (PTR_ERR(dp->grfclk) == -ENOENT) {
 		dp->grfclk = NULL;
 	} else if (PTR_ERR(dp->grfclk) == -EPROBE_DEFER) {
 		return -EPROBE_DEFER;
 	} else if (IS_ERR(dp->grfclk)) {
 		dev_err(dev, "failed to get grf clock\n");
 		return PTR_ERR(dp->grfclk);
 	}

 	dp->pclk = devm_clk_get(dev, "pclk");
 	if (IS_ERR(dp->pclk)) {
 		dev_err(dev, "failed to get pclk property\n");
 		return PTR_ERR(dp->pclk);
 	}

 	dp->rst = devm_reset_control_get(dev, "dp");
 	if (IS_ERR(dp->rst)) {
 		dev_err(dev, "failed to get dp reset control\n");
 		return PTR_ERR(dp->rst);
 	}

 	ret = clk_prepare_enable(dp->pclk);
 	if (ret < 0) {
 		dev_err(dp->dev, "failed to enable pclk %d\n", ret);
 		return ret;
 	}

 	ret = rockchip_dp_pre_init(dp);
 	if (ret < 0) {
 		dev_err(dp->dev, "failed to pre init %d\n", ret);
 		clk_disable_unprepare(dp->pclk);
 		return ret;
 	}

 	return 0;
 }

 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
 {
 	struct drm_encoder *encoder = &dp->encoder;
 	struct drm_device *drm_dev = dp->drm_dev;
 	struct device *dev = dp->dev;
 	int ret;

 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
 							     dev->of_node);
 	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);

 	ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
 			       DRM_MODE_ENCODER_TMDS, NULL);
 	if (ret) {
 		DRM_ERROR("failed to initialize encoder with drm\n");
 		return ret;
 	}

 	drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);

 	return 0;
 }

 static int rockchip_dp_bind(struct device *dev, struct device *master,
 			    void *data)
 {
 	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
 	const struct rockchip_dp_chip_data *dp_data;
 	struct drm_device *drm_dev = data;
 	int ret;

 	/*
 	 * Just like the probe function said, we don't need the
 	 * device drvrate anymore, we should leave the charge to
 	 * analogix dp driver, set the device drvdata to NULL.
 	 */
 	dev_set_drvdata(dev, NULL);

 	dp_data = of_device_get_match_data(dev);
 	if (!dp_data)
 		return -ENODEV;

 	ret = rockchip_dp_init(dp);
 	if (ret < 0)
 		return ret;

 	dp->data = dp_data;
 	dp->drm_dev = drm_dev;

 	ret = rockchip_dp_drm_create_encoder(dp);
 	if (ret) {
 		DRM_ERROR("failed to create drm encoder\n");
 		return ret;
 	}

 	dp->plat_data.encoder = &dp->encoder;

 	dp->plat_data.dev_type = dp->data->chip_type;
 	dp->plat_data.power_on = rockchip_dp_poweron;
 	dp->plat_data.power_off = rockchip_dp_powerdown;
 	dp->plat_data.get_modes = rockchip_dp_get_modes;

 	spin_lock_init(&dp->psr_lock);
 	dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;
 	INIT_WORK(&dp->psr_work, analogix_dp_psr_work);

 	rockchip_drm_psr_register(&dp->encoder, analogix_dp_psr_set);

 	return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
 }

 static void rockchip_dp_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
 	struct rockchip_dp_device *dp = dev_get_drvdata(dev);

 	rockchip_drm_psr_unregister(&dp->encoder);

 	return analogix_dp_unbind(dev, master, data);
 }

 static const struct component_ops rockchip_dp_component_ops = {
 	.bind = rockchip_dp_bind,
 	.unbind = rockchip_dp_unbind,
 };

 static int rockchip_dp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *panel_node, *port, *endpoint;
 	struct drm_panel *panel = NULL;
 	struct rockchip_dp_device *dp;

 	port = of_graph_get_port_by_id(dev->of_node, 1);
 	if (port) {
 		endpoint = of_get_child_by_name(port, "endpoint");
 		of_node_put(port);
 		if (!endpoint) {
 			dev_err(dev, "no output endpoint found\n");
 			return -EINVAL;
 		}

 		panel_node = of_graph_get_remote_port_parent(endpoint);
 		of_node_put(endpoint);
 		if (!panel_node) {
 			dev_err(dev, "no output node found\n");
 			return -EINVAL;
 		}

 		panel = of_drm_find_panel(panel_node);
 		of_node_put(panel_node);
 		if (!panel)
 			return -EPROBE_DEFER;
 	}

 	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
 	if (!dp)
 		return -ENOMEM;

 	dp->dev = dev;

 	dp->plat_data.panel = panel;

 	/*
 	 * We just use the drvdata until driver run into component
 	 * add function, and then we would set drvdata to null, so
 	 * that analogix dp driver could take charge of the drvdata.
 	 */
 	platform_set_drvdata(pdev, dp);

 	return component_add(dev, &rockchip_dp_component_ops);
 }

 static int rockchip_dp_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &rockchip_dp_component_ops);

 	return 0;
 }

 static const struct dev_pm_ops rockchip_dp_pm_ops = {
 #ifdef CONFIG_PM_SLEEP
 	.suspend = analogix_dp_suspend,
 	.resume_early = analogix_dp_resume,
 #endif
 };

 static const struct rockchip_dp_chip_data rk3399_edp = {
 	.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
 	.lcdsel_big = HIWORD_UPDATE(0, RK3399_EDP_LCDC_SEL),
 	.lcdsel_lit = HIWORD_UPDATE(RK3399_EDP_LCDC_SEL, RK3399_EDP_LCDC_SEL),
 	.chip_type = RK3399_EDP,
 };

 static const struct rockchip_dp_chip_data rk3288_dp = {
 	.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
 	.lcdsel_big = HIWORD_UPDATE(0, RK3288_EDP_LCDC_SEL),
 	.lcdsel_lit = HIWORD_UPDATE(RK3288_EDP_LCDC_SEL, RK3288_EDP_LCDC_SEL),
 	.chip_type = RK3288_DP,
 };

 static const struct of_device_id rockchip_dp_dt_ids[] = {
 	{.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
 	{.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
 	{}
 };
 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);

 static struct platform_driver rockchip_dp_driver = {
 	.probe = rockchip_dp_probe,
 	.remove = rockchip_dp_remove,
 	.driver = {
 		   .name = "rockchip-dp",
 		   .pm = &rockchip_dp_pm_ops,
 		   .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
 	},
 };

 module_platform_driver(rockchip_dp_driver);

 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
 MODULE_LICENSE("GPL v2");
	/*
	* Rockchip SoC DP (Display Port) interface driver.
	*
	* Copyright (C) Fuzhou Rockchip Electronics Co., Ltd.
	* Author: Andy Yan <andy.yan@rock-chips.com>
	* Yakir Yang <ykk@rock-chips.com>
	* Jeff Chen <jeff.chen@rock-chips.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*/

	#include <linux/component.h>
	#include <linux/mfd/syscon.h>
	#include <linux/of_device.h>
	#include <linux/of_graph.h>
	#include <linux/regmap.h>
	#include <linux/reset.h>
	#include <linux/clk.h>

	#include <drm/drmP.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_dp_helper.h>
	#include <drm/drm_of.h>
	#include <drm/drm_panel.h>

	#include <video/of_videomode.h>
	#include <video/videomode.h>

	#include <drm/bridge/analogix_dp.h>

	#include "rockchip_drm_drv.h"
	#include "rockchip_drm_psr.h"
	#include "rockchip_drm_vop.h"

	#define RK3288_GRF_SOC_CON6 0x25c
	#define RK3288_EDP_LCDC_SEL BIT(5)
	#define RK3399_GRF_SOC_CON20 0x6250
	#define RK3399_EDP_LCDC_SEL BIT(5)

	#define HIWORD_UPDATE(val, mask) (val \| (mask) << 16)

	#define PSR_WAIT_LINE_FLAG_TIMEOUT_MS 100

	#define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm)

	/**
	* struct rockchip_dp_chip_data - splite the grf setting of kind of chips
	* @lcdsel_grf_reg: grf register offset of lcdc select
	* @lcdsel_big: reg value of selecting vop big for eDP
	* @lcdsel_lit: reg value of selecting vop little for eDP
	* @chip_type: specific chip type
	*/
	struct rockchip_dp_chip_data {
	u32 lcdsel_grf_reg;
	u32 lcdsel_big;
	u32 lcdsel_lit;
	u32 chip_type;
	};

	struct rockchip_dp_device {
	struct drm_device *drm_dev;
	struct device *dev;
	struct drm_encoder encoder;
	struct drm_display_mode mode;

	struct clk *pclk;
	struct clk *grfclk;
	struct regmap *grf;
	struct reset_control *rst;

	struct work_struct psr_work;
	spinlock_t psr_lock;
	unsigned int psr_state;

	const struct rockchip_dp_chip_data *data;

	struct analogix_dp_plat_data plat_data;
	};

	static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
	{
	struct rockchip_dp_device *dp = to_dp(encoder);
	unsigned long flags;

	if (!analogix_dp_psr_supported(dp->dev))
	return;

	dev_dbg(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");

	spin_lock_irqsave(&dp->psr_lock, flags);
	if (enabled)
	dp->psr_state = EDP_VSC_PSR_STATE_ACTIVE;
	else
	dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;

	schedule_work(&dp->psr_work);
	spin_unlock_irqrestore(&dp->psr_lock, flags);
	}

	static void analogix_dp_psr_work(struct work_struct *work)
	{
	struct rockchip_dp_device *dp =
	container_of(work, typeof(*dp), psr_work);
	struct drm_crtc *crtc = dp->encoder.crtc;
	int psr_state = dp->psr_state;
	int vact_end;
	int ret;
	unsigned long flags;

	if (!crtc)
	return;

	vact_end = crtc->mode.vtotal - crtc->mode.vsync_start + crtc->mode.vdisplay;

	ret = rockchip_drm_wait_line_flag(dp->encoder.crtc, vact_end,
	PSR_WAIT_LINE_FLAG_TIMEOUT_MS);
	if (ret) {
	dev_err(dp->dev, "line flag interrupt did not arrive\n");
	return;
	}

	spin_lock_irqsave(&dp->psr_lock, flags);
	if (psr_state == EDP_VSC_PSR_STATE_ACTIVE)
	analogix_dp_enable_psr(dp->dev);
	else
	analogix_dp_disable_psr(dp->dev);
	spin_unlock_irqrestore(&dp->psr_lock, flags);
	}

	static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
	{
	reset_control_assert(dp->rst);
	usleep_range(10, 20);
	reset_control_deassert(dp->rst);

	return 0;
	}

	static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
	{
	struct rockchip_dp_device *dp = to_dp(plat_data);
	int ret;

	cancel_work_sync(&dp->psr_work);

	ret = clk_prepare_enable(dp->pclk);
	if (ret < 0) {
	dev_err(dp->dev, "failed to enable pclk %d\n", ret);
	return ret;
	}

	ret = rockchip_dp_pre_init(dp);
	if (ret < 0) {
	dev_err(dp->dev, "failed to dp pre init %d\n", ret);
	clk_disable_unprepare(dp->pclk);
	return ret;
	}

	return 0;
	}

	static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
	{
	struct rockchip_dp_device *dp = to_dp(plat_data);

	clk_disable_unprepare(dp->pclk);

	return 0;
	}

	static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
	struct drm_connector *connector)
	{
	struct drm_display_info *di = &connector->display_info;
	/* VOP couldn't output YUV video format for eDP rightly */
	u32 mask = DRM_COLOR_FORMAT_YCRCB444 \| DRM_COLOR_FORMAT_YCRCB422;

	if ((di->color_formats & mask)) {
	DRM_DEBUG_KMS("Swapping display color format from YUV to RGB\n");
	di->color_formats &= ~mask;
	di->color_formats \|= DRM_COLOR_FORMAT_RGB444;
	di->bpc = 8;
	}

	return 0;
	}

	static bool
	rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
	const struct drm_display_mode *mode,
	struct drm_display_mode *adjusted_mode)
	{
	/* do nothing */
	return true;
	}

	static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
	struct drm_display_mode *mode,
	struct drm_display_mode *adjusted)
	{
	/* do nothing */
	}

	static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
	{
	struct rockchip_dp_device *dp = to_dp(encoder);
	int ret;
	u32 val;

	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
	if (ret < 0)
	return;

	if (ret)
	val = dp->data->lcdsel_lit;
	else
	val = dp->data->lcdsel_big;

	dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");

	ret = clk_prepare_enable(dp->grfclk);
	if (ret < 0) {
	dev_err(dp->dev, "failed to enable grfclk %d\n", ret);
	return;
	}

	ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
	if (ret != 0)
	dev_err(dp->dev, "Could not write to GRF: %d\n", ret);

	clk_disable_unprepare(dp->grfclk);
	}

	static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
	{
	/* do nothing */
	}

	static int
	rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
	struct drm_crtc_state *crtc_state,
	struct drm_connector_state *conn_state)
	{
	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
	struct rockchip_dp_device *dp = to_dp(encoder);
	int ret;

	/*
	* The hardware IC designed that VOP must output the RGB10 video
	* format to eDP controller, and if eDP panel only support RGB8,
	* then eDP controller should cut down the video data, not via VOP
	* controller, that's why we need to hardcode the VOP output mode
	* to RGA10 here.
	*/

	s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
	s->output_type = DRM_MODE_CONNECTOR_eDP;
	if (dp->data->chip_type == RK3399_EDP) {
	/*
	* For RK3399, VOP Lit must code the out mode to RGB888,
	* VOP Big must code the out mode to RGB10.
	*/
	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node,
	encoder);
	if (ret > 0)
	s->output_mode = ROCKCHIP_OUT_MODE_P888;
	}

	return 0;
	}

	static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
	.mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
	.mode_set = rockchip_dp_drm_encoder_mode_set,
	.enable = rockchip_dp_drm_encoder_enable,
	.disable = rockchip_dp_drm_encoder_nop,
	.atomic_check = rockchip_dp_drm_encoder_atomic_check,
	};

	static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
	{
	drm_encoder_cleanup(encoder);
	}

	static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
	.destroy = rockchip_dp_drm_encoder_destroy,
	};

	static int rockchip_dp_init(struct rockchip_dp_device *dp)
	{
	struct device *dev = dp->dev;
	struct device_node *np = dev->of_node;
	int ret;

	dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
	if (IS_ERR(dp->grf)) {
	dev_err(dev, "failed to get rockchip,grf property\n");
	return PTR_ERR(dp->grf);
	}

	dp->grfclk = devm_clk_get(dev, "grf");
	if (PTR_ERR(dp->grfclk) == -ENOENT) {
	dp->grfclk = NULL;
	} else if (PTR_ERR(dp->grfclk) == -EPROBE_DEFER) {
	return -EPROBE_DEFER;
	} else if (IS_ERR(dp->grfclk)) {
	dev_err(dev, "failed to get grf clock\n");
	return PTR_ERR(dp->grfclk);
	}

	dp->pclk = devm_clk_get(dev, "pclk");
	if (IS_ERR(dp->pclk)) {
	dev_err(dev, "failed to get pclk property\n");
	return PTR_ERR(dp->pclk);
	}

	dp->rst = devm_reset_control_get(dev, "dp");
	if (IS_ERR(dp->rst)) {
	dev_err(dev, "failed to get dp reset control\n");
	return PTR_ERR(dp->rst);
	}

	ret = clk_prepare_enable(dp->pclk);
	if (ret < 0) {
	dev_err(dp->dev, "failed to enable pclk %d\n", ret);
	return ret;
	}

	ret = rockchip_dp_pre_init(dp);
	if (ret < 0) {
	dev_err(dp->dev, "failed to pre init %d\n", ret);
	clk_disable_unprepare(dp->pclk);
	return ret;
	}

	return 0;
	}

	static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
	{
	struct drm_encoder *encoder = &dp->encoder;
	struct drm_device *drm_dev = dp->drm_dev;
	struct device *dev = dp->dev;
	int ret;

	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
	dev->of_node);
	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);

	ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
	DRM_MODE_ENCODER_TMDS, NULL);
	if (ret) {
	DRM_ERROR("failed to initialize encoder with drm\n");
	return ret;
	}

	drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);

	return 0;
	}

	static int rockchip_dp_bind(struct device dev, struct device master,
	void *data)
	{
	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
	const struct rockchip_dp_chip_data *dp_data;
	struct drm_device *drm_dev = data;
	int ret;

	/*
	* Just like the probe function said, we don't need the
	* device drvrate anymore, we should leave the charge to
	* analogix dp driver, set the device drvdata to NULL.
	*/
	dev_set_drvdata(dev, NULL);

	dp_data = of_device_get_match_data(dev);
	if (!dp_data)
	return -ENODEV;

	ret = rockchip_dp_init(dp);
	if (ret < 0)
	return ret;

	dp->data = dp_data;
	dp->drm_dev = drm_dev;

	ret = rockchip_dp_drm_create_encoder(dp);
	if (ret) {
	DRM_ERROR("failed to create drm encoder\n");
	return ret;
	}

	dp->plat_data.encoder = &dp->encoder;

	dp->plat_data.dev_type = dp->data->chip_type;
	dp->plat_data.power_on = rockchip_dp_poweron;
	dp->plat_data.power_off = rockchip_dp_powerdown;
	dp->plat_data.get_modes = rockchip_dp_get_modes;

	spin_lock_init(&dp->psr_lock);
	dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;
	INIT_WORK(&dp->psr_work, analogix_dp_psr_work);

	rockchip_drm_psr_register(&dp->encoder, analogix_dp_psr_set);

	return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
	}

	static void rockchip_dp_unbind(struct device dev, struct device master,
	void *data)
	{
	struct rockchip_dp_device *dp = dev_get_drvdata(dev);

	rockchip_drm_psr_unregister(&dp->encoder);

	return analogix_dp_unbind(dev, master, data);
	}

	static const struct component_ops rockchip_dp_component_ops = {
	.bind = rockchip_dp_bind,
	.unbind = rockchip_dp_unbind,
	};

	static int rockchip_dp_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct device_node panel_node, port, *endpoint;
	struct drm_panel *panel = NULL;
	struct rockchip_dp_device *dp;

	port = of_graph_get_port_by_id(dev->of_node, 1);
	if (port) {
	endpoint = of_get_child_by_name(port, "endpoint");
	of_node_put(port);
	if (!endpoint) {
	dev_err(dev, "no output endpoint found\n");
	return -EINVAL;
	}

	panel_node = of_graph_get_remote_port_parent(endpoint);
	of_node_put(endpoint);
	if (!panel_node) {
	dev_err(dev, "no output node found\n");
	return -EINVAL;
	}

	panel = of_drm_find_panel(panel_node);
	of_node_put(panel_node);
	if (!panel)
	return -EPROBE_DEFER;
	}

	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
	if (!dp)
	return -ENOMEM;

	dp->dev = dev;

	dp->plat_data.panel = panel;

	/*
	* We just use the drvdata until driver run into component
	* add function, and then we would set drvdata to null, so
	* that analogix dp driver could take charge of the drvdata.
	*/
	platform_set_drvdata(pdev, dp);

	return component_add(dev, &rockchip_dp_component_ops);
	}

	static int rockchip_dp_remove(struct platform_device *pdev)
	{
	component_del(&pdev->dev, &rockchip_dp_component_ops);

	return 0;
	}

	static const struct dev_pm_ops rockchip_dp_pm_ops = {
	#ifdef CONFIG_PM_SLEEP
	.suspend = analogix_dp_suspend,
	.resume_early = analogix_dp_resume,
	#endif
	};

	static const struct rockchip_dp_chip_data rk3399_edp = {
	.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
	.lcdsel_big = HIWORD_UPDATE(0, RK3399_EDP_LCDC_SEL),
	.lcdsel_lit = HIWORD_UPDATE(RK3399_EDP_LCDC_SEL, RK3399_EDP_LCDC_SEL),
	.chip_type = RK3399_EDP,
	};

	static const struct rockchip_dp_chip_data rk3288_dp = {
	.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
	.lcdsel_big = HIWORD_UPDATE(0, RK3288_EDP_LCDC_SEL),
	.lcdsel_lit = HIWORD_UPDATE(RK3288_EDP_LCDC_SEL, RK3288_EDP_LCDC_SEL),
	.chip_type = RK3288_DP,
	};

	static const struct of_device_id rockchip_dp_dt_ids[] = {
	{.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
	{.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
	{}
	};
	MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);

	static struct platform_driver rockchip_dp_driver = {
	.probe = rockchip_dp_probe,
	.remove = rockchip_dp_remove,
	.driver = {
	.name = "rockchip-dp",
	.pm = &rockchip_dp_pm_ops,
	.of_match_table = of_match_ptr(rockchip_dp_dt_ids),
	},
	};

	module_platform_driver(rockchip_dp_driver);

	MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
	MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
	MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
	MODULE_LICENSE("GPL v2");