[mirror_ubuntu-disco-kernel.git] / drivers / gpu / drm / rockchip / analogix_dp-rockchip.c

/*
 * 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;

	const struct rockchip_dp_chip_data *data;

	struct analogix_dp_device *adp;
	struct analogix_dp_plat_data plat_data;
};

static int analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
{
	struct rockchip_dp_device *dp = to_dp(encoder);
	int ret;

	if (!analogix_dp_psr_enabled(dp->adp))
		return 0;

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

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

	if (enabled)
		return analogix_dp_enable_psr(dp->adp);
	else
		return analogix_dp_disable_psr(dp->adp);
}

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;

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

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

	return rockchip_drm_psr_activate(&dp->encoder);
}

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

	ret = rockchip_drm_psr_deactivate(&dp->encoder);
	if (ret != 0)
		return ret;

	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;

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

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

	ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
	if (ret != 0)
		DRM_DEV_ERROR(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);

	/*
	 * 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;

	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 struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

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

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

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

	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;

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

	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;

	ret = rockchip_drm_psr_register(&dp->encoder, analogix_dp_psr_set);
	if (ret < 0)
		goto err_cleanup_encoder;

	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
	if (IS_ERR(dp->adp)) {
		ret = PTR_ERR(dp->adp);
		goto err_unreg_psr;
	}

	return 0;
err_unreg_psr:
	rockchip_drm_psr_unregister(&dp->encoder);
err_cleanup_encoder:
	dp->encoder.funcs->destroy(&dp->encoder);
	return ret;
}

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

	analogix_dp_unbind(dp->adp);
	rockchip_drm_psr_unregister(&dp->encoder);
	dp->encoder.funcs->destroy(&dp->encoder);
}

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 drm_panel *panel = NULL;
	struct rockchip_dp_device *dp;
	int ret;

	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);
	if (ret < 0)
		return ret;

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

	dp->dev = dev;
	dp->plat_data.panel = panel;

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

	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;
}

#ifdef CONFIG_PM_SLEEP
static int rockchip_dp_suspend(struct device *dev)
{
	struct rockchip_dp_device *dp = dev_get_drvdata(dev);

	return analogix_dp_suspend(dp->adp);
}

static int rockchip_dp_resume(struct device *dev)
{
	struct rockchip_dp_device *dp = dev_get_drvdata(dev);

	return analogix_dp_resume(dp->adp);
}
#endif

static const struct dev_pm_ops rockchip_dp_pm_ops = {
#ifdef CONFIG_PM_SLEEP
	.suspend = rockchip_dp_suspend,
	.resume_early = rockchip_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);

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),
	},
};
Commit	Line	Data
	1	/*
	2	* Rockchip SoC DP (Display Port) interface driver.
	3	*
	4	* Copyright (C) Fuzhou Rockchip Electronics Co., Ltd.
	5	* Author: Andy Yan <andy.yan@rock-chips.com>
	6	* Yakir Yang <ykk@rock-chips.com>
	7	* Jeff Chen <jeff.chen@rock-chips.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*/
	14
	15	#include <linux/component.h>
	16	#include <linux/mfd/syscon.h>
	17	#include <linux/of_device.h>
	18	#include <linux/of_graph.h>
	19	#include <linux/regmap.h>
	20	#include <linux/reset.h>
	21	#include <linux/clk.h>
	22
	23	#include <drm/drmP.h>
	24	#include <drm/drm_crtc_helper.h>
	25	#include <drm/drm_dp_helper.h>
	26	#include <drm/drm_of.h>
	27	#include <drm/drm_panel.h>
	28
	29	#include <video/of_videomode.h>
	30	#include <video/videomode.h>
	31
	32	#include <drm/bridge/analogix_dp.h>
	33
	34	#include "rockchip_drm_drv.h"
	35	#include "rockchip_drm_psr.h"
	36	#include "rockchip_drm_vop.h"
	37
	38	#define RK3288_GRF_SOC_CON6 0x25c
	39	#define RK3288_EDP_LCDC_SEL BIT(5)
	40	#define RK3399_GRF_SOC_CON20 0x6250
	41	#define RK3399_EDP_LCDC_SEL BIT(5)
	42
	43	#define HIWORD_UPDATE(val, mask) (val \| (mask) << 16)
	44
	45	#define PSR_WAIT_LINE_FLAG_TIMEOUT_MS 100
	46
	47	#define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm)
	48
	49	/**
	50	* struct rockchip_dp_chip_data - splite the grf setting of kind of chips
	51	* @lcdsel_grf_reg: grf register offset of lcdc select
	52	* @lcdsel_big: reg value of selecting vop big for eDP
	53	* @lcdsel_lit: reg value of selecting vop little for eDP
	54	* @chip_type: specific chip type
	55	*/
	56	struct rockchip_dp_chip_data {
	57	u32 lcdsel_grf_reg;
	58	u32 lcdsel_big;
	59	u32 lcdsel_lit;
	60	u32 chip_type;
	61	};
	62
	63	struct rockchip_dp_device {
	64	struct drm_device *drm_dev;
	65	struct device *dev;
	66	struct drm_encoder encoder;
	67	struct drm_display_mode mode;
	68
	69	struct clk *pclk;
	70	struct clk *grfclk;
	71	struct regmap *grf;
	72	struct reset_control *rst;
	73
	74	const struct rockchip_dp_chip_data *data;
	75
	76	struct analogix_dp_device *adp;
	77	struct analogix_dp_plat_data plat_data;
	78	};
	79
	80	static int analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
	81	{
	82	struct rockchip_dp_device *dp = to_dp(encoder);
	83	int ret;
	84
	85	if (!analogix_dp_psr_enabled(dp->adp))
	86	return 0;
	87
	88	DRM_DEV_DEBUG(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");
	89
	90	ret = rockchip_drm_wait_vact_end(dp->encoder.crtc,
	91	PSR_WAIT_LINE_FLAG_TIMEOUT_MS);
	92	if (ret) {
	93	DRM_DEV_ERROR(dp->dev, "line flag interrupt did not arrive\n");
	94	return -ETIMEDOUT;
	95	}
	96
	97	if (enabled)
	98	return analogix_dp_enable_psr(dp->adp);
	99	else
	100	return analogix_dp_disable_psr(dp->adp);
	101	}
	102
	103	static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
	104	{
	105	reset_control_assert(dp->rst);
	106	usleep_range(10, 20);
	107	reset_control_deassert(dp->rst);
	108
	109	return 0;
	110	}
	111
	112	static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
	113	{
	114	struct rockchip_dp_device *dp = to_dp(plat_data);
	115	int ret;
	116
	117	ret = clk_prepare_enable(dp->pclk);
	118	if (ret < 0) {
	119	DRM_DEV_ERROR(dp->dev, "failed to enable pclk %d\n", ret);
	120	return ret;
	121	}
	122
	123	ret = rockchip_dp_pre_init(dp);
	124	if (ret < 0) {
	125	DRM_DEV_ERROR(dp->dev, "failed to dp pre init %d\n", ret);
	126	clk_disable_unprepare(dp->pclk);
	127	return ret;
	128	}
	129
	130	return rockchip_drm_psr_activate(&dp->encoder);
	131	}
	132
	133	static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
	134	{
	135	struct rockchip_dp_device *dp = to_dp(plat_data);
	136	int ret;
	137
	138	ret = rockchip_drm_psr_deactivate(&dp->encoder);
	139	if (ret != 0)
	140	return ret;
	141
	142	clk_disable_unprepare(dp->pclk);
	143
	144	return 0;
	145	}
	146
	147	static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
	148	struct drm_connector *connector)
	149	{
	150	struct drm_display_info *di = &connector->display_info;
	151	/* VOP couldn't output YUV video format for eDP rightly */
	152	u32 mask = DRM_COLOR_FORMAT_YCRCB444 \| DRM_COLOR_FORMAT_YCRCB422;
	153
	154	if ((di->color_formats & mask)) {
	155	DRM_DEBUG_KMS("Swapping display color format from YUV to RGB\n");
	156	di->color_formats &= ~mask;
	157	di->color_formats \|= DRM_COLOR_FORMAT_RGB444;
	158	di->bpc = 8;
	159	}
	160
	161	return 0;
	162	}
	163
	164	static bool
	165	rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
	166	const struct drm_display_mode *mode,
	167	struct drm_display_mode *adjusted_mode)
	168	{
	169	/* do nothing */
	170	return true;
	171	}
	172
	173	static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
	174	struct drm_display_mode *mode,
	175	struct drm_display_mode *adjusted)
	176	{
	177	/* do nothing */
	178	}
	179
	180	static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
	181	{
	182	struct rockchip_dp_device *dp = to_dp(encoder);
	183	int ret;
	184	u32 val;
	185
	186	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
	187	if (ret < 0)
	188	return;
	189
	190	if (ret)
	191	val = dp->data->lcdsel_lit;
	192	else
	193	val = dp->data->lcdsel_big;
	194
	195	DRM_DEV_DEBUG(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
	196
	197	ret = clk_prepare_enable(dp->grfclk);
	198	if (ret < 0) {
	199	DRM_DEV_ERROR(dp->dev, "failed to enable grfclk %d\n", ret);
	200	return;
	201	}
	202
	203	ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
	204	if (ret != 0)
	205	DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
	206
	207	clk_disable_unprepare(dp->grfclk);
	208	}
	209
	210	static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
	211	{
	212	/* do nothing */
	213	}
	214
	215	static int
	216	rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
	217	struct drm_crtc_state *crtc_state,
	218	struct drm_connector_state *conn_state)
	219	{
	220	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
	221
	222	/*
	223	* The hardware IC designed that VOP must output the RGB10 video
	224	* format to eDP controller, and if eDP panel only support RGB8,
	225	* then eDP controller should cut down the video data, not via VOP
	226	* controller, that's why we need to hardcode the VOP output mode
	227	* to RGA10 here.
	228	*/
	229
	230	s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
	231	s->output_type = DRM_MODE_CONNECTOR_eDP;
	232
	233	return 0;
	234	}
	235
	236	static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
	237	.mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
	238	.mode_set = rockchip_dp_drm_encoder_mode_set,
	239	.enable = rockchip_dp_drm_encoder_enable,
	240	.disable = rockchip_dp_drm_encoder_nop,
	241	.atomic_check = rockchip_dp_drm_encoder_atomic_check,
	242	};
	243
	244	static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
	245	.destroy = drm_encoder_cleanup,
	246	};
	247
	248	static int rockchip_dp_of_probe(struct rockchip_dp_device *dp)
	249	{
	250	struct device *dev = dp->dev;
	251	struct device_node *np = dev->of_node;
	252
	253	dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
	254	if (IS_ERR(dp->grf)) {
	255	DRM_DEV_ERROR(dev, "failed to get rockchip,grf property\n");
	256	return PTR_ERR(dp->grf);
	257	}
	258
	259	dp->grfclk = devm_clk_get(dev, "grf");
	260	if (PTR_ERR(dp->grfclk) == -ENOENT) {
	261	dp->grfclk = NULL;
	262	} else if (PTR_ERR(dp->grfclk) == -EPROBE_DEFER) {
	263	return -EPROBE_DEFER;
	264	} else if (IS_ERR(dp->grfclk)) {
	265	DRM_DEV_ERROR(dev, "failed to get grf clock\n");
	266	return PTR_ERR(dp->grfclk);
	267	}
	268
	269	dp->pclk = devm_clk_get(dev, "pclk");
	270	if (IS_ERR(dp->pclk)) {
	271	DRM_DEV_ERROR(dev, "failed to get pclk property\n");
	272	return PTR_ERR(dp->pclk);
	273	}
	274
	275	dp->rst = devm_reset_control_get(dev, "dp");
	276	if (IS_ERR(dp->rst)) {
	277	DRM_DEV_ERROR(dev, "failed to get dp reset control\n");
	278	return PTR_ERR(dp->rst);
	279	}
	280
	281	return 0;
	282	}
	283
	284	static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
	285	{
	286	struct drm_encoder *encoder = &dp->encoder;
	287	struct drm_device *drm_dev = dp->drm_dev;
	288	struct device *dev = dp->dev;
	289	int ret;
	290
	291	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
	292	dev->of_node);
	293	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
	294
	295	ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
	296	DRM_MODE_ENCODER_TMDS, NULL);
	297	if (ret) {
	298	DRM_ERROR("failed to initialize encoder with drm\n");
	299	return ret;
	300	}
	301
	302	drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
	303
	304	return 0;
	305	}
	306
	307	static int rockchip_dp_bind(struct device dev, struct device master,
	308	void *data)
	309	{
	310	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
	311	const struct rockchip_dp_chip_data *dp_data;
	312	struct drm_device *drm_dev = data;
	313	int ret;
	314
	315	dp_data = of_device_get_match_data(dev);
	316	if (!dp_data)
	317	return -ENODEV;
	318
	319	dp->data = dp_data;
	320	dp->drm_dev = drm_dev;
	321
	322	ret = rockchip_dp_drm_create_encoder(dp);
	323	if (ret) {
	324	DRM_ERROR("failed to create drm encoder\n");
	325	return ret;
	326	}
	327
	328	dp->plat_data.encoder = &dp->encoder;
	329
	330	dp->plat_data.dev_type = dp->data->chip_type;
	331	dp->plat_data.power_on = rockchip_dp_poweron;
	332	dp->plat_data.power_off = rockchip_dp_powerdown;
	333	dp->plat_data.get_modes = rockchip_dp_get_modes;
	334
	335	ret = rockchip_drm_psr_register(&dp->encoder, analogix_dp_psr_set);
	336	if (ret < 0)
	337	goto err_cleanup_encoder;
	338
	339	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
	340	if (IS_ERR(dp->adp)) {
	341	ret = PTR_ERR(dp->adp);
	342	goto err_unreg_psr;
	343	}
	344
	345	return 0;
	346	err_unreg_psr:
	347	rockchip_drm_psr_unregister(&dp->encoder);
	348	err_cleanup_encoder:
	349	dp->encoder.funcs->destroy(&dp->encoder);
	350	return ret;
	351	}
	352
	353	static void rockchip_dp_unbind(struct device dev, struct device master,
	354	void *data)
	355	{
	356	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
	357
	358	analogix_dp_unbind(dp->adp);
	359	rockchip_drm_psr_unregister(&dp->encoder);
	360	dp->encoder.funcs->destroy(&dp->encoder);
	361	}
	362
	363	static const struct component_ops rockchip_dp_component_ops = {
	364	.bind = rockchip_dp_bind,
	365	.unbind = rockchip_dp_unbind,
	366	};
	367
	368	static int rockchip_dp_probe(struct platform_device *pdev)
	369	{
	370	struct device *dev = &pdev->dev;
	371	struct drm_panel *panel = NULL;
	372	struct rockchip_dp_device *dp;
	373	int ret;
	374
	375	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);
	376	if (ret < 0)
	377	return ret;
	378
	379	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
	380	if (!dp)
	381	return -ENOMEM;
	382
	383	dp->dev = dev;
	384	dp->plat_data.panel = panel;
	385
	386	ret = rockchip_dp_of_probe(dp);
	387	if (ret < 0)
	388	return ret;
	389
	390	platform_set_drvdata(pdev, dp);
	391
	392	return component_add(dev, &rockchip_dp_component_ops);
	393	}
	394
	395	static int rockchip_dp_remove(struct platform_device *pdev)
	396	{
	397	component_del(&pdev->dev, &rockchip_dp_component_ops);
	398
	399	return 0;
	400	}
	401
	402	#ifdef CONFIG_PM_SLEEP
	403	static int rockchip_dp_suspend(struct device *dev)
	404	{
	405	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
	406
	407	return analogix_dp_suspend(dp->adp);
	408	}
	409
	410	static int rockchip_dp_resume(struct device *dev)
	411	{
	412	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
	413
	414	return analogix_dp_resume(dp->adp);
	415	}
	416	#endif
	417
	418	static const struct dev_pm_ops rockchip_dp_pm_ops = {
	419	#ifdef CONFIG_PM_SLEEP
	420	.suspend = rockchip_dp_suspend,
	421	.resume_early = rockchip_dp_resume,
	422	#endif
	423	};
	424
	425	static const struct rockchip_dp_chip_data rk3399_edp = {
	426	.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
	427	.lcdsel_big = HIWORD_UPDATE(0, RK3399_EDP_LCDC_SEL),
	428	.lcdsel_lit = HIWORD_UPDATE(RK3399_EDP_LCDC_SEL, RK3399_EDP_LCDC_SEL),
	429	.chip_type = RK3399_EDP,
	430	};
	431
	432	static const struct rockchip_dp_chip_data rk3288_dp = {
	433	.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
	434	.lcdsel_big = HIWORD_UPDATE(0, RK3288_EDP_LCDC_SEL),
	435	.lcdsel_lit = HIWORD_UPDATE(RK3288_EDP_LCDC_SEL, RK3288_EDP_LCDC_SEL),
	436	.chip_type = RK3288_DP,
	437	};
	438
	439	static const struct of_device_id rockchip_dp_dt_ids[] = {
	440	{.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
	441	{.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
	442	{}
	443	};
	444	MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
	445
	446	struct platform_driver rockchip_dp_driver = {
	447	.probe = rockchip_dp_probe,
	448	.remove = rockchip_dp_remove,
	449	.driver = {
	450	.name = "rockchip-dp",
	451	.pm = &rockchip_dp_pm_ops,
	452	.of_match_table = of_match_ptr(rockchip_dp_dt_ids),
	453	},
	454	};