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From: Chris Zhong <zyw@rock-chips.com>
To: dianders@chromium.org, tfiga@chromium.org, heiko@sntech.de,
	yzq@rock-chips.com, groeck@chromium.org
Subject: [v2 PATCH 4/4] drm/rockchip: cdn-dp: add cdn DP support for rk3399
Date: Mon, 13 Jun 2016 17:39:49 +0800
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Add support for cdn DP controller which is embedded in the rk3399
SoCs. The DP is compliant with DisplayPort Specification,
Version 1.3, This IP is compatible with the rockchip type-c PHY IP.
There is a uCPU in DP controller, it need a firmware to work,
please put the firmware file to /lib/firmware/cdn/dptx.bin. The
uCPU in charge of aux communication and link training, the host use
mailbox to communicate with the ucpu.
The dclk pin_pol of vop must not be invert for DP.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v2:
- Alphabetic order
- remove excess error message
- use define clk_rate
- check all return value
- remove dev_set_name(dp->dev, "cdn-dp");
- use schedule_delayed_work
- remove never-called functions
- remove some unnecessary ()

Changes in v1:
- use extcon API
- use hdmi-codec for the DP Asoc
- do not initialize the "ret"
- printk a err log when drm_of_encoder_active_endpoint_id
- modify the dclk pin_pol to a single line

 drivers/gpu/drm/rockchip/Kconfig            |   9 +
 drivers/gpu/drm/rockchip/Makefile           |   1 +
 drivers/gpu/drm/rockchip/cdn-dp-core.c      | 694 +++++++++++++++++++++++++++
 drivers/gpu/drm/rockchip/cdn-dp-core.h      | 108 +++++
 drivers/gpu/drm/rockchip/cdn-dp-reg.c       | 717 ++++++++++++++++++++++++++++
 drivers/gpu/drm/rockchip/cdn-dp-reg.h       | 404 ++++++++++++++++
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c |   6 +-
 drivers/gpu/drm/rockchip/rockchip_drm_vop.h |   2 +
 drivers/gpu/drm/rockchip/rockchip_vop_reg.c |   2 +
 9 files changed, 1942 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-core.c
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-core.h
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-reg.c
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-reg.h

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index d30bdc3..20da9a8 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -25,6 +25,15 @@ config ROCKCHIP_ANALOGIX_DP
 	  for the Analogix Core DP driver. If you want to enable DP
 	  on RK3288 based SoC, you should selet this option.
 
+config ROCKCHIP_CDN_DP
+        tristate "Rockchip cdn DP"
+        depends on DRM_ROCKCHIP
+        help
+	  This selects support for Rockchip SoC specific extensions
+	  for the cdn Dp driver. If you want to enable Dp on
+	  RK3399 based SoC, you should selet this
+	  option.
+
 config ROCKCHIP_DW_HDMI
         tristate "Rockchip specific extensions for Synopsys DW HDMI"
         depends on DRM_ROCKCHIP
diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
index 05d0713..abdecd5 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -7,6 +7,7 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
 rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 
 obj-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
+obj-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
 obj-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
 obj-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
 obj-$(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
new file mode 100644
index 0000000..4e7f036
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -0,0 +1,694 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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_dp_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/extcon.h>
+#include <linux/firmware.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/mfd/syscon.h>
+#include <linux/phy/phy-rockchip-typec.h>
+
+#include <sound/hdmi-codec.h>
+
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#include "cdn-dp-reg.h"
+#include "cdn-dp-core.h"
+#include "rockchip_drm_vop.h"
+
+#define connector_to_dp(c) \
+		container_of(c, struct cdn_dp_device, connector)
+
+#define encoder_to_dp(c) \
+		container_of(c, struct cdn_dp_device, encoder)
+
+/* dp grf register offset */
+#define DP_VOP_SEL		0x6224
+#define DP_SEL_VOP_LIT		BIT(12)
+#define DP_CLK_RATE		200000000
+#define WAIT_HPD_STABLE		1000
+
+static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
+{
+	int ret;
+
+	ret = clk_prepare_enable(dp->pclk);
+	if (ret < 0) {
+		dev_err(dp->dev, "cannot enable dp pclk %d\n", ret);
+		goto err_pclk;
+	}
+
+	ret = clk_prepare_enable(dp->core_clk);
+	if (ret < 0) {
+		dev_err(dp->dev, "cannot enable core_clk %d\n", ret);
+		goto err_core_clk;
+	}
+
+	ret = clk_set_rate(dp->core_clk, DP_CLK_RATE);
+	if (ret < 0) {
+		dev_err(dp->dev, "cannot set dp core clk to %d %d\n",
+			DP_CLK_RATE, ret);
+		goto err_set_rate;
+	}
+
+	/* notice fw the clk freq value */
+	cdn_dp_set_fw_clk(dp, DP_CLK_RATE);
+
+	return 0;
+
+err_set_rate:
+	clk_disable_unprepare(dp->core_clk);
+err_core_clk:
+	clk_disable_unprepare(dp->pclk);
+err_pclk:
+	return ret;
+}
+
+static enum drm_connector_status
+cdn_dp_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct cdn_dp_device *dp = connector_to_dp(connector);
+
+	return dp->hpd_status ? connector_status_connected :
+				connector_status_disconnected;
+}
+
+static void cdn_dp_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
+	.dpms = drm_atomic_helper_connector_dpms,
+	.detect = cdn_dp_connector_detect,
+	.destroy = cdn_dp_connector_destroy,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.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 int cdn_dp_connector_get_modes(struct drm_connector *connector)
+{
+	struct cdn_dp_device *dp = connector_to_dp(connector);
+	struct edid *edid;
+
+	if (!dp->fw_loaded)
+		return 0;
+
+	edid = drm_do_get_edid(connector, cdn_dp_get_edid_block, dp);
+	if (edid) {
+		dev_dbg(dp->dev, "got edid: width[%d] x height[%d]\n",
+			edid->width_cm, edid->height_cm);
+
+		dp->sink_has_audio = drm_detect_monitor_audio(edid);
+		drm_mode_connector_update_edid_property(connector, edid);
+		drm_add_edid_modes(connector, edid);
+		/* Store the ELD */
+		drm_edid_to_eld(connector, edid);
+		kfree(edid);
+	} else {
+		dev_dbg(dp->dev, "failed to get edid\n");
+	}
+
+	return 0;
+}
+
+static struct drm_encoder *
+	cdn_dp_connector_best_encoder(struct drm_connector *connector)
+{
+	struct cdn_dp_device *dp = connector_to_dp(connector);
+
+	return &dp->encoder;
+}
+
+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;
+	long requested = mode->clock * display_info->bpc * 3 / 1000;
+	long actual, rate;
+
+	rate = drm_dp_bw_code_to_link_rate(dp->link.rate);
+	actual = rate * dp->link.num_lanes / 100;
+
+	/* efficiency is about 0.8 */
+	actual = actual * 8 / 10;
+
+	if (requested > actual) {
+		dev_dbg(dp->dev, "requested=%ld, actual=%ld, clock=%d, bpc= %d\n",
+			requested, actual, mode->clock, display_info->bpc);
+		return MODE_H_ILLEGAL;
+	}
+
+	return MODE_OK;
+}
+
+static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
+	.get_modes = cdn_dp_connector_get_modes,
+	.best_encoder = cdn_dp_connector_best_encoder,
+	.mode_valid = cdn_dp_connector_mode_valid,
+};
+
+static void cdn_dp_commit(struct drm_encoder *encoder)
+{
+	struct cdn_dp_device *dp = encoder_to_dp(encoder);
+
+	if (cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE))
+		return;
+
+	if (cdn_dp_config_video(dp)) {
+		dev_err(dp->dev, "unable to config video\n");
+		return;
+	}
+
+	if (cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID))
+		return;
+
+	dp->dpms_mode = DRM_MODE_DPMS_ON;
+}
+
+static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
+				    struct drm_display_mode *mode,
+				    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 rockchip_crtc_state *state;
+	struct video_info *video = &dp->video_info;
+	int ret, val;
+
+	switch (display_info->bpc) {
+	case 16:
+	case 12:
+	case 10:
+		video->color_depth = 10;
+		break;
+	case 6:
+		video->color_depth = 6;
+		break;
+	default:
+		video->color_depth = 8;
+		break;
+	}
+
+	video->color_fmt = PXL_RGB;
+
+	video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
+	video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
+
+	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
+	if (ret < 0) {
+		dev_err(dp->dev, "Could not get vop id, %d", ret);
+		return;
+	}
+
+	state = to_rockchip_crtc_state(encoder->crtc->state);
+	if (ret) {
+		val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
+		state->output_mode = ROCKCHIP_OUT_MODE_P888;
+	} else {
+		val = DP_SEL_VOP_LIT << 16;
+		state->output_mode = ROCKCHIP_OUT_MODE_AAAA;
+	}
+	ret = regmap_write(dp->grf, DP_VOP_SEL, val);
+	if (ret != 0)
+		dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
+
+	memcpy(&dp->mode, adjusted, sizeof(*mode));
+}
+
+static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
+{
+	struct cdn_dp_device *dp = encoder_to_dp(encoder);
+
+	if (dp->dpms_mode != DRM_MODE_DPMS_ON)
+		cdn_dp_commit(encoder);
+}
+
+static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
+{
+	struct cdn_dp_device *dp = encoder_to_dp(encoder);
+
+	if (dp->dpms_mode != DRM_MODE_DPMS_OFF) {
+		cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
+		dp->dpms_mode = DRM_MODE_DPMS_OFF;
+	}
+}
+
+static int
+cdn_dp_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);
+
+	s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
+	s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
+
+	return 0;
+}
+
+static struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
+	.mode_set = cdn_dp_encoder_mode_set,
+	.enable = cdn_dp_encoder_enable,
+	.disable = cdn_dp_encoder_disable,
+	.atomic_check = cdn_dp_encoder_atomic_check,
+};
+
+static struct drm_encoder_funcs cdn_dp_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
+{
+	int ret;
+	const u32 *iram_data, *dram_data;
+	const struct firmware *fw;
+	const struct cdn_firmware_header *hdr;
+
+	if (dp->fw_loaded)
+		return 0;
+
+	ret = request_firmware(&fw, "cdn/dptx.bin", dp->dev);
+	if (ret < 0) {
+		dev_err(dp->dev, "failed to request firmware %d\n", ret);
+		return ret;
+	}
+
+	hdr = (struct cdn_firmware_header *)fw->data;
+	if (fw->size != le32_to_cpu(hdr->size_bytes))
+		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);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_active(dp, true);
+	if (ret) {
+		dev_err(dp->dev, "active ucpu failed: %d\n", ret);
+		return ret;
+	}
+
+	return cdn_dp_event_config(dp);
+}
+
+static int cdn_dp_init(struct cdn_dp_device *dp)
+{
+	struct device *dev = dp->dev;
+	struct device_node *np = dev->of_node;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct resource *res;
+	int ret;
+
+	dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+	if (IS_ERR(dp->grf)) {
+		dev_err(dev, "cdn-dp needs rockchip,grf property\n");
+		return PTR_ERR(dp->grf);
+	}
+
+	dp->irq = platform_get_irq(pdev, 0);
+	if (dp->irq < 0) {
+		dev_err(dev, "cdn-dp can not get irq\n");
+		return dp->irq;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dp->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dp->regs)) {
+		dev_err(dev, "ioremap reg failed\n");
+		return PTR_ERR(dp->regs);
+	}
+
+	dp->core_clk = devm_clk_get(dev, "core_clk");
+	if (IS_ERR(dp->core_clk)) {
+		dev_err(dev, "cannot get core_clk_dp\n");
+		return PTR_ERR(dp->core_clk);
+	}
+
+	dp->pclk = devm_clk_get(dev, "pclk");
+	if (IS_ERR(dp->pclk)) {
+		dev_err(dev, "cannot get pclk\n");
+		return PTR_ERR(dp->pclk);
+	}
+
+	dp->spdif_clk = devm_clk_get(dev, "spdif");
+	if (IS_ERR(dp->spdif_clk)) {
+		dev_err(dev, "cannot get spdif_clk\n");
+		return PTR_ERR(dp->spdif_clk);
+	}
+
+	dp->dpms_mode = DRM_MODE_DPMS_OFF;
+
+	ret = cdn_dp_clk_enable(dp);
+	if (ret < 0)
+		return ret;
+
+	dp_clock_reset_seq(dp);
+
+	return 0;
+}
+
+static int cdn_dp_audio_hw_params(struct device *dev,
+				  struct hdmi_codec_daifmt *daifmt,
+				  struct hdmi_codec_params *params)
+{
+	struct cdn_dp_device *dp = dev_get_drvdata(dev);
+	int ret;
+	struct audio_info audio = {
+		.sample_width = params->sample_width,
+		.sample_rate = params->sample_rate,
+		.channels = params->channels,
+	};
+
+	if (!dp->encoder.crtc)
+		return -ENODEV;
+
+	switch (daifmt->fmt) {
+	case HDMI_I2S:
+		audio.format = AFMT_I2S;
+		break;
+	case HDMI_SPDIF:
+		audio.format = AFMT_SPDIF;
+		break;
+	default:
+		dev_err(dev, "%s: Invalid format %d\n", __func__, daifmt->fmt);
+		return -EINVAL;
+	}
+
+	ret = cdn_dp_audio_config_set(dp, &audio);
+	if (!ret)
+		dp->audio_info = audio;
+
+	return ret;
+}
+
+static void cdn_dp_audio_shutdown(struct device *dev)
+{
+	struct cdn_dp_device *dp = dev_get_drvdata(dev);
+	int ret = cdn_dp_audio_stop(dp, &dp->audio_info);
+
+	if (!ret)
+		dp->audio_info.format = AFMT_UNUSED;
+}
+
+static int cdn_dp_audio_digital_mute(struct device *dev, bool enable)
+{
+	struct cdn_dp_device *dp = dev_get_drvdata(dev);
+
+	return cdn_dp_audio_mute(dp, enable);
+}
+
+static int cdn_dp_audio_get_eld(struct device *dev, uint8_t *buf, size_t len)
+{
+	struct cdn_dp_device *dp = dev_get_drvdata(dev);
+	struct drm_mode_config *config = &dp->encoder.dev->mode_config;
+	struct drm_connector *connector;
+	int ret = -ENODEV;
+
+	mutex_lock(&config->mutex);
+	list_for_each_entry(connector, &config->connector_list, head) {
+		if (&dp->encoder == connector->encoder) {
+			memcpy(buf, connector->eld,
+			       min(sizeof(connector->eld), len));
+			ret = 0;
+		}
+	}
+	mutex_unlock(&config->mutex);
+
+	return ret;
+}
+
+static const struct hdmi_codec_ops audio_codec_ops = {
+	.hw_params = cdn_dp_audio_hw_params,
+	.audio_shutdown = cdn_dp_audio_shutdown,
+	.digital_mute = cdn_dp_audio_digital_mute,
+	.get_eld = cdn_dp_audio_get_eld,
+};
+
+static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
+				   struct device *dev)
+{
+	struct hdmi_codec_pdata codec_data = {
+		.i2s = 1,
+		.spdif = 1,
+		.ops = &audio_codec_ops,
+		.max_i2s_channels = 8,
+	};
+
+	dp->audio_pdev = platform_device_register_data(
+			 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+			 &codec_data, sizeof(codec_data));
+
+	return PTR_ERR_OR_ZERO(dp->audio_pdev);
+}
+
+static int cdn_dp_pd_event(struct notifier_block *nb,
+			   unsigned long event, void *priv)
+{
+	struct cdn_dp_device *dp;
+	struct extcon_dev *edev = priv;
+	int value = edev->state;
+	u8 map;
+
+	dp = container_of(nb, struct cdn_dp_device, event_nb);
+
+	map = GET_PIN_MAP(value);
+
+	/*
+	 * if the old state is not plugged, and the map is 0, the device is
+	 * certainly not DP.
+	 */
+	if (!map && !dp->plugged)
+		return 0;
+
+	dp->plugged = GET_PLUGGED(value);
+	dp->flip = GET_FLIP(value);
+
+	if (map & (PIN_MAP_B | PIN_MAP_D | PIN_MAP_F))
+		dp->cap_lanes = 2;
+	else
+		dp->cap_lanes = 4;
+
+	schedule_delayed_work(&dp->event_wq, msecs_to_jiffies(WAIT_HPD_STABLE));
+
+	return 0;
+}
+
+static void cdn_dp_pd_event_wq(struct work_struct *work)
+{
+	struct cdn_dp_device *dp;
+	int ret;
+
+	dp = container_of(work, struct cdn_dp_device, event_wq.work);
+
+	if (cdn_dp_firmware_init(dp))
+		return;
+
+	ret = cdn_dp_get_hpd_status(dp);
+	if (ret <= 0) {
+		/* read hpd status failed, or the hpd does not exist. */
+		dp->hpd_status = false;
+		drm_helper_hpd_irq_event(dp->drm_dev);
+		return;
+	}
+
+	/*
+	 * Set the capability and start the training process once
+	 * the hpd is detected.
+	 */
+	ret = cdn_dp_set_host_cap(dp);
+	if (ret) {
+		dev_err(dp->dev, "set host capabilities failed\n");
+		return;
+	}
+
+	ret = cdn_dp_training_start(dp);
+	if (ret) {
+		dev_err(dp->dev, "hw lt err:%d\n", ret);
+		return;
+	}
+
+	ret = cdn_dp_get_lt_status(dp);
+	if (ret) {
+		dev_err(dp->dev, "hw lt get status failed\n");
+		return;
+	}
+
+	dev_info(dp->dev, "rate:%d, lanes:%d\n",
+		 dp->link.rate, dp->link.num_lanes);
+
+	dp->hpd_status = true;
+	drm_helper_hpd_irq_event(dp->drm_dev);
+}
+
+static int cdn_dp_bind(struct device *dev, struct device *master,
+		       void *data)
+{
+	struct cdn_dp_device *dp = dev_get_drvdata(dev);
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	struct drm_device *drm_dev = data;
+	int ret;
+
+	ret = cdn_dp_init(dp);
+	if (ret < 0)
+		return ret;
+
+	dp->drm_dev = drm_dev;
+
+	encoder = &dp->encoder;
+
+	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, &cdn_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, &cdn_dp_encoder_helper_funcs);
+
+	connector = &dp->connector;
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+	connector->dpms = DRM_MODE_DPMS_OFF;
+
+	ret = drm_connector_init(drm_dev, connector,
+				 &cdn_dp_atomic_connector_funcs,
+				 DRM_MODE_CONNECTOR_DisplayPort);
+	if (ret) {
+		DRM_ERROR("failed to initialize connector with drm\n");
+		goto err_free_encoder;
+	}
+
+	drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
+
+	ret = drm_mode_connector_attach_encoder(connector, encoder);
+	if (ret) {
+		DRM_ERROR("failed to attach connector and encoder\n");
+		goto err_free_connector;
+	}
+
+	cdn_dp_audio_codec_init(dp, dev);
+
+	dp->event_nb.notifier_call = cdn_dp_pd_event;
+	INIT_DELAYED_WORK(&dp->event_wq, cdn_dp_pd_event_wq);
+	ret = extcon_register_notifier(dp->extcon, EXTCON_USB,
+				       &dp->event_nb);
+	if (ret) {
+		dev_err(dev, "regitster notifer failed\n");
+		return ret;
+	}
+
+	return 0;
+
+err_free_connector:
+	drm_connector_cleanup(connector);
+err_free_encoder:
+	drm_encoder_cleanup(encoder);
+	return ret;
+}
+
+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;
+
+	platform_device_unregister(dp->audio_pdev);
+	cdn_dp_encoder_disable(encoder);
+	encoder->funcs->destroy(encoder);
+	drm_connector_unregister(&dp->connector);
+	drm_connector_cleanup(&dp->connector);
+	drm_encoder_cleanup(encoder);
+
+	extcon_unregister_notifier(dp->extcon, EXTCON_USB,
+				   &dp->event_nb);
+}
+
+static const struct component_ops cdn_dp_component_ops = {
+	.bind = cdn_dp_bind,
+	.unbind = cdn_dp_unbind,
+};
+
+static int cdn_dp_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct cdn_dp_device *dp;
+
+	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
+	if (!dp)
+		return -ENOMEM;
+	dp->dev = dev;
+
+	dp->extcon = extcon_get_edev_by_phandle(dev, 0);
+	if (IS_ERR(dp->extcon)) {
+		if (PTR_ERR(dp->extcon) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(dev, "Invalid or missing extcon\n");
+		return PTR_ERR(dp->extcon);
+	}
+
+	dev_set_drvdata(dev, dp);
+
+	return component_add(dev, &cdn_dp_component_ops);
+}
+
+static int cdn_dp_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &cdn_dp_component_ops);
+
+	return 0;
+}
+
+static const struct of_device_id cdn_dp_dt_ids[] = {
+	{.compatible = "rockchip,cdn-dp",},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
+
+static struct platform_driver cdn_dp_driver = {
+	.probe = cdn_dp_probe,
+	.remove = cdn_dp_remove,
+	.driver = {
+		   .name = "cdn-dp",
+		   .owner = THIS_MODULE,
+		   .of_match_table = of_match_ptr(cdn_dp_dt_ids),
+	},
+};
+
+module_platform_driver(cdn_dp_driver);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_DESCRIPTION("cdn DP Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h b/drivers/gpu/drm/rockchip/cdn-dp-core.h
new file mode 100644
index 0000000..aa63520
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2016 Chris Zhong <zyw@rock-chips.com>
+ * Copyright (C) 2016 ROCKCHIP, Inc.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#ifndef _ROCKCHIP_EDP_CORE_H
+#define _ROCKCHIP_EDP_CORE_H
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_panel.h>
+#include "rockchip_drm_drv.h"
+#include "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;
+};
+
+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 */
+	u32 iram_size; /* size of iram */
+	u32 dram_size; /* size of dram */
+};
+
+struct cdn_dp_device {
+	struct device *dev;
+	struct drm_device *drm_dev;
+	struct drm_connector connector;
+	struct drm_encoder encoder;
+	struct drm_display_mode mode;
+	struct platform_device *audio_pdev;
+
+	const struct firmware *fw;	/* cdn dp firmware */
+	unsigned int fw_version;	/* cdn fw version */
+	bool fw_loaded;
+	void __iomem *regs;
+	struct regmap *grf;
+	unsigned int irq;
+	struct clk *core_clk;
+	struct clk *pclk;
+	struct clk *spdif_clk;
+	struct audio_info audio_info;
+	struct video_info video_info;
+	struct extcon_dev	*extcon;
+	struct notifier_block	event_nb;
+	struct delayed_work	event_wq;
+
+	bool plugged;
+	bool hpd_status;
+	int cap_lanes;
+	bool flip;
+
+	int dpms_mode;
+	struct drm_dp_link link;
+	bool sink_has_audio;
+};
+
+void dp_clock_reset_seq(struct cdn_dp_device *dp);
+
+void cdn_dp_set_fw_clk(struct cdn_dp_device *dp, int 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_active(struct cdn_dp_device *dp, bool enable);
+int cdn_dp_set_host_cap(struct cdn_dp_device *dp);
+int cdn_dp_event_config(struct cdn_dp_device *dp);
+int 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);
+int cdn_dp_get_edid_block(void *dp, u8 *edid,
+			  unsigned int block, size_t length);
+int cdn_dp_training_start(struct cdn_dp_device *dp);
+int cdn_dp_get_lt_status(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_set(struct cdn_dp_device *dp, struct audio_info *audio);
+
+#endif  /* _ROCKCHIP_EDP_CORE_H */
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.c b/drivers/gpu/drm/rockchip/cdn-dp-reg.c
new file mode 100644
index 0000000..82277bb
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-reg.c
@@ -0,0 +1,717 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/reset.h>
+
+#include "cdn-dp-core.h"
+#include "cdn-dp-reg.h"
+
+#define FW_ALIVE_TIMEOUT_US		1000000
+#define MAILBOX_TIMEOUT_US		5000000
+
+void cdn_dp_set_fw_clk(struct cdn_dp_device *dp, int clk)
+{
+	writel(clk / 1000000, dp->regs + SW_CLK_H);
+}
+
+void dp_clock_reset_seq(struct cdn_dp_device *dp)
+{
+	writel(0xfff, dp->regs + SOURCE_DPTX_CAR);
+	writel(0x7, dp->regs + SOURCE_PHY_CAR);
+	writel(0xf, dp->regs + SOURCE_PKT_CAR);
+	writel(0xff, dp->regs + SOURCE_AIF_CAR);
+	writel(0xf, dp->regs + SOURCE_CIPHER_CAR);
+	writel(0x3, dp->regs + SOURCE_CRYPTO_CAR);
+	writel(0, dp->regs + APB_INT_MASK);
+}
+
+static int cdn_dp_mailbox_read(struct cdn_dp_device *dp)
+{
+	int val, ret;
+
+	if (!dp->fw_loaded)
+		return 0;
+
+	ret = readx_poll_timeout(readl, dp->regs + MAILBOX_EMPTY_ADDR,
+				 val, !val, 1000, MAILBOX_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dp->dev, "failed to read mailbox, keep alive = %x\n",
+			readl(dp->regs + KEEP_ALIVE));
+		return ret;
+	}
+
+	return readl(dp->regs + MAILBOX0_RD_DATA) & 0xff;
+}
+
+static int cdp_dp_mailbox_write(struct cdn_dp_device *dp, u8 val)
+{
+	int ret, full;
+
+	if (!dp->fw_loaded)
+		return 0;
+
+	ret = readx_poll_timeout(readl, dp->regs + MAILBOX_FULL_ADDR,
+				 full, !full, 1000, MAILBOX_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dp->dev, "mailbox is full, keep alive = %x\n",
+			readl(dp->regs + KEEP_ALIVE));
+		return ret;
+	}
+
+	writel(val, dp->regs + MAILBOX0_WR_DATA);
+
+	return 0;
+}
+
+static int cdn_dp_mailbox_response(struct cdn_dp_device *dp, u8 module_id,
+				   u8 opcode, u8 *buff, u8 buff_size)
+{
+	int ret, i = 0;
+	u8 header[4];
+
+	/* read the header of the message */
+	while (i < 4) {
+		ret = cdn_dp_mailbox_read(dp);
+		if (ret < 0)
+			return ret;
+
+		header[i++] = ret;
+	}
+
+	if (opcode != header[0] || module_id != header[1] ||
+	    buff_size != ((header[2] << 8) | header[3])) {
+		dev_err(dp->dev, "mailbox response failed");
+
+		/*
+		 * If the message in mailbox is not what we want, we need to
+		 * clear the mailbox by read.
+		 */
+		i = (header[2] << 8) | header[3];
+		while (i--)
+			if (cdn_dp_mailbox_read(dp) < 0)
+				break;
+
+		return -EINVAL;
+	}
+
+	i = 0;
+	while (i < buff_size) {
+		ret = cdn_dp_mailbox_read(dp);
+		if (ret < 0)
+			return ret;
+
+		buff[i++] = ret;
+	}
+
+	return 0;
+}
+
+static int cdn_dp_mailbox_send(struct cdn_dp_device *dp, u8 module_id,
+			       u8 opcode, u16 size, u8 *message)
+{
+	u8 header[4];
+	int ret, i;
+
+	header[0] = opcode;
+	header[1] = module_id;
+	header[2] = size >> 8;
+	header[3] = size & 0xff;
+
+	for (i = 0; i < 4; i++) {
+		ret = cdp_dp_mailbox_write(dp, header[i]);
+		if (ret)
+			return ret;
+	}
+
+	while (size--) {
+		ret = cdp_dp_mailbox_write(dp, *message++);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val)
+{
+	u8 msg[6];
+
+	msg[0] = (addr >> 8) & 0xff;
+	msg[1] = addr & 0xff;
+	msg[2] = (val >> 24) & 0xff;
+	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,
+				   ARRAY_SIZE(msg), msg);
+}
+
+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 i, reg, ret;
+
+	/* reset ucpu before load firmware*/
+	writel(APB_IRAM_PATH | APB_DRAM_PATH | APB_XT_RESET,
+	       dp->regs + APB_CTRL);
+
+	for (i = 0; i < i_size; i += 4)
+		writel(*i_mem++, dp->regs + ADDR_IMEM + i);
+
+	for (i = 0; i < d_size; i += 4)
+		writel(*d_mem++, dp->regs + ADDR_DMEM + i);
+
+	/* un-reset ucpu */
+	writel(0, dp->regs + APB_CTRL);
+
+	/* check the keep alive register to make sure fw working */
+	ret = readx_poll_timeout(readl, dp->regs + KEEP_ALIVE,
+				 reg, reg, 2000, FW_ALIVE_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dp->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;
+
+	dp->fw_loaded = 1;
+
+	return 0;
+}
+
+int cdn_dp_reg_write_bit(struct cdn_dp_device *dp, u16 addr, u8 start_bit,
+			 u8 bits_no, u32 val)
+{
+	u8 field[8];
+
+	field[0] = (addr >> 8) & 0xff;
+	field[1] = addr & 0xff;
+	field[2] = start_bit;
+	field[3] = bits_no;
+	field[4] = (val >> 24) & 0xff;
+	field[5] = (val >> 16) & 0xff;
+	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);
+}
+
+int cdn_dp_active(struct cdn_dp_device *dp, bool enable)
+{
+	u8 active = enable ? 1 : 0;
+	u8 resp;
+	int ret;
+
+	/* set firmware status, 1: avtive; 0: standby */
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_GENERAL,
+				  GENERAL_MAIN_CONTROL, 1, &active);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_mailbox_response(dp, MB_MODULE_ID_GENERAL,
+				      GENERAL_MAIN_CONTROL, &resp, 1);
+	if (ret)
+		return ret;
+
+	return resp ? 0 : -EINVAL;
+}
+
+int cdn_dp_set_host_cap(struct cdn_dp_device *dp)
+{
+	u8 msg[8];
+	int ret;
+
+	msg[0] = DP_LINK_BW_5_4;
+	msg[1] = dp->cap_lanes;
+	msg[2] = VOLTAGE_LEVEL_2;
+	msg[3] = PRE_EMPHASIS_LEVEL_3;
+	msg[4] = PRBS7 | D10_2 | TRAINING_PTN1 | TRAINING_PTN2;
+	msg[5] = FAST_LT_NOT_SUPPORT;
+	msg[6] = LANE_MAPPING_NORMAL;
+	msg[7] = ENHANCED;
+
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX,
+				  DPTX_SET_HOST_CAPABILITIES,
+				  ARRAY_SIZE(msg), msg);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_reg_write(dp, DP_AUX_SWAP_INVERSION_CONTROL,
+			       AUX_HOST_INVERT);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+int cdn_dp_event_config(struct cdn_dp_device *dp)
+{
+	u8 msg[5] = {0, 0, 0, 0, 0};
+
+	msg[0] = DPTX_EVENT_ENABLE_HPD | DPTX_EVENT_ENABLE_TRAINING;
+
+	return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_ENABLE_EVENT,
+				    ARRAY_SIZE(msg), msg);
+}
+
+int cdn_dp_get_event(struct cdn_dp_device *dp)
+{
+	return readl(dp->regs + SW_EVENTS0);
+}
+
+int cdn_dp_get_hpd_status(struct cdn_dp_device *dp)
+{
+	u8 status;
+	int ret;
+
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_HPD_STATE,
+				  0, NULL);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_mailbox_response(dp, MB_MODULE_ID_DP_TX,
+				      DPTX_HPD_STATE, &status, 1);
+	if (ret)
+		return ret;
+
+	return status;
+}
+
+int cdn_dp_get_edid_block(void *data, u8 *edid,
+			  unsigned int block, size_t length)
+{
+	struct cdn_dp_device *dp = data;
+	u8 msg[2], reg[EDID_DATA + EDID_BLOCK_SIZE];
+	int ret;
+
+	if (length != EDID_BLOCK_SIZE)
+		return -EINVAL;
+
+	msg[0] = block / 2;
+	msg[1] = block % 2;
+
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_GET_EDID,
+				  2, msg);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_mailbox_response(dp, MB_MODULE_ID_DP_TX,
+				      DPTX_GET_EDID, reg,
+				      EDID_DATA + EDID_BLOCK_SIZE);
+	if (ret)
+		return ret;
+
+	if (reg[EDID_LENGTH_BYTE] != EDID_BLOCK_SIZE ||
+	    reg[EDID_SEGMENT_BUMBER] != block / 2) {
+		dev_err(dp->dev, "edid block size err\n");
+		return -EINVAL;
+	}
+
+	memcpy(edid, &reg[EDID_DATA], EDID_BLOCK_SIZE);
+
+	return 0;
+}
+
+int cdn_dp_training_start(struct cdn_dp_device *dp)
+{
+	u8 msg, event[2];
+	unsigned long timeout;
+	int ret;
+
+	msg = LINK_TRAINING_RUN;
+
+	/* start training */
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_TRAINING_CONTROL,
+				  1, &msg);
+	if (ret)
+		return ret;
+
+	/* the whole training should finish in 500ms */
+	timeout = jiffies + msecs_to_jiffies(500);
+	while (1) {
+		msleep(20);
+		ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX,
+					  DPTX_READ_EVENT, 0, NULL);
+		if (ret)
+			return ret;
+
+		ret = cdn_dp_mailbox_response(dp, MB_MODULE_ID_DP_TX,
+					      DPTX_READ_EVENT, event, 2);
+		if (ret)
+			return ret;
+
+		if (event[1] & EQ_PHASE_FINISHED)
+			break;
+
+		if (time_after(jiffies, timeout))
+			return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+int cdn_dp_get_lt_status(struct cdn_dp_device *dp)
+{
+	u8 status[10];
+	int ret;
+
+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_READ_LINK_STAT,
+				  0, NULL);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_mailbox_response(dp, MB_MODULE_ID_DP_TX,
+				      DPTX_READ_LINK_STAT, status, 10);
+	if (ret)
+		return ret;
+
+	dp->link.rate = status[0];
+	dp->link.num_lanes = status[1];
+
+	return 0;
+}
+
+int cdn_dp_set_video_status(struct cdn_dp_device *dp, int active)
+{
+	u8 msg;
+
+	msg = !!active;
+
+	return cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_SET_VIDEO,
+				   1, &msg);
+}
+
+static int cdn_dp_get_msa_misc(struct video_info *video,
+			       struct drm_display_mode *mode)
+{
+	u8 val0, val1;
+	u32 msa_misc;
+
+	switch (video->color_fmt) {
+	case PXL_RGB:
+	case Y_ONLY:
+		val0 = 0;
+		break;
+	case YCBCR_4_4_4:
+		val0 = 6;
+		break;
+	case YCBCR_4_2_2:
+		val0 = 5;
+		break;
+	case YCBCR_4_2_0:
+		val0 = 5;
+		break;
+	};
+
+	switch (video->color_depth) {
+	case 6:
+		val1 = 0;
+		break;
+	case 8:
+		val1 = 1;
+		break;
+	case 10:
+		val1 = 2;
+		break;
+	case 12:
+		val1 = 3;
+		break;
+	case 16:
+		val1 = 4;
+		break;
+	};
+
+	msa_misc = 2 * val0 + 32 * val1 +
+		   ((video->color_fmt == Y_ONLY) ? (1 << 14) : 0);
+
+	return msa_misc;
+}
+
+int cdn_dp_config_video(struct cdn_dp_device *dp)
+{
+	struct video_info *video = &dp->video_info;
+	struct drm_display_mode *mode = &dp->mode;
+	u32 val, link_rate;
+	u8 bit_per_pix;
+	int ret;
+
+	bit_per_pix = (video->color_fmt == YCBCR_4_2_2) ?
+		      (video->color_depth * 2) : (video->color_depth * 3);
+
+	val = VIF_BYPASS_INTERLACE;
+
+	ret = cdn_dp_reg_write(dp, BND_HSYNC2VSYNC, val);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_reg_write(dp, HSYNC2VSYNC_POL_CTRL, 0);
+	if (ret)
+		return ret;
+
+	link_rate = drm_dp_bw_code_to_link_rate(dp->link.rate) / 1000;
+
+	val = TU_SIZE * mode->clock * bit_per_pix;
+	val /= dp->link.num_lanes * link_rate * 8 * 1000;
+	if (mode->clock > 500000)
+		val++;
+	val += TU_SIZE << 8;
+
+	ret = cdn_dp_reg_write(dp, DP_FRAMER_TU, val);
+	if (ret)
+		return ret;
+
+	switch (video->color_depth) {
+	case 6:
+		val = BCS_6;
+		break;
+	case 8:
+		val = BCS_8;
+		break;
+	case 10:
+		val = BCS_10;
+		break;
+	case 12:
+		val = BCS_12;
+		break;
+	case 16:
+		val = BCS_16;
+		break;
+	};
+
+	val += video->color_fmt << 8;
+	ret = cdn_dp_reg_write(dp, DP_FRAMER_PXL_REPR, val);
+	if (ret)
+		return ret;
+
+	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);
+	if (ret)
+		return ret;
+
+	val = (mode->hsync_start - mode->hdisplay) << 16;
+	val |= mode->htotal - mode->hsync_end;
+	ret = cdn_dp_reg_write(dp, DP_FRONT_BACK_PORCH, val);
+	if (ret)
+		return ret;
+
+	val = mode->hdisplay * bit_per_pix / 8;
+	ret = cdn_dp_reg_write(dp, DP_BYTE_COUNT, val);
+	if (ret)
+		return ret;
+
+	val = mode->htotal | ((mode->htotal - mode->hsync_start) << 16);
+	ret = cdn_dp_reg_write(dp, MSA_HORIZONTAL_0, val);
+	if (ret)
+		return ret;
+
+	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);
+	if (ret)
+		return ret;
+
+	val = mode->vtotal;
+	val |= ((mode->vtotal - mode->vsync_start) << 16);
+
+	ret = cdn_dp_reg_write(dp, MSA_VERTICAL_0, val);
+	if (ret)
+		return ret;
+
+	val = mode->vsync_end - mode->vsync_start;
+	val |= mode->vdisplay << 16;
+	val |= (video->v_sync_polarity << 15);
+	ret = cdn_dp_reg_write(dp, MSA_VERTICAL_1, val);
+	if (ret)
+		return ret;
+
+	val = cdn_dp_get_msa_misc(video, mode);
+	ret = cdn_dp_reg_write(dp, MSA_MISC, val);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_reg_write(dp, STREAM_CONFIG, 1);
+	if (ret)
+		return ret;
+
+	val = mode->hsync_end - mode->hsync_start;
+	val |= (mode->hdisplay << 16);
+	ret = cdn_dp_reg_write(dp, DP_HORIZONTAL, val);
+	if (ret)
+		return ret;
+
+	val = mode->vtotal;
+	val -= (mode->vtotal - mode->vdisplay);
+	val |= (mode->vtotal - mode->vsync_start) << 16;
+
+	ret = cdn_dp_reg_write(dp, DP_VERTICAL_0, val);
+	if (ret)
+		return ret;
+
+	val = mode->vtotal;
+	ret = cdn_dp_reg_write(dp, DP_VERTICAL_1, val);
+	if (ret)
+		return ret;
+
+	val =  0;
+	return cdn_dp_reg_write_bit(dp, DP_VB_ID, 2, 1, val);
+}
+
+int cdn_dp_audio_stop(struct cdn_dp_device *dp, struct audio_info *audio)
+{
+	int ret = cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN(0));
+
+	if (ret)
+		return ret;
+
+	if (audio->format == AFMT_SPDIF)
+		clk_disable_unprepare(dp->spdif_clk);
+
+	return 0;
+}
+
+int cdn_dp_audio_mute(struct cdn_dp_device *dp, bool enable)
+{
+	return cdn_dp_reg_write_bit(dp, DP_VB_ID, 4, 1, enable);
+}
+
+int cdn_dp_audio_config_set(struct cdn_dp_device *dp, struct audio_info *audio)
+{
+	int lanes_param, i2s_port_en_val, val, i;
+	int ret;
+
+	if (audio->channels == 2 && dp->link.num_lanes == 1)
+		lanes_param = 1;
+	else if (audio->channels == 2)
+		lanes_param = 3;
+	else
+		lanes_param = 0;
+
+	if (audio->channels == 2)
+		i2s_port_en_val = 1;
+	else if (audio->channels == 4)
+		i2s_port_en_val = 3;
+	else
+		i2s_port_en_val = 0xf;
+
+	ret = cdn_dp_reg_write(dp, CM_LANE_CTRL, 0x8000);
+	if (ret)
+		return ret;
+
+	ret = cdn_dp_reg_write(dp, CM_CTRL, 0);
+	if (ret)
+		return ret;
+
+	if (audio->format == AFMT_I2S) {
+		writel(0x0, dp->regs + SPDIF_CTRL_ADDR);
+
+		writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL);
+
+		val = audio->channels - 1;
+		val |= (audio->channels / 2 - 1) << 5;
+		val |= BIT(8);
+		val |= lanes_param << 11;
+		writel(val, dp->regs + SMPL2PKT_CNFG);
+
+		if (audio->sample_width == 16)
+			val = 0;
+		else if (audio->sample_width == 24)
+			val = 1 << 9;
+		else
+			val = 2 << 9;
+
+		val |= (audio->channels - 1) << 2;
+		val |= i2s_port_en_val << 17;
+		val |= 2 << 11;
+		writel(val, dp->regs + AUDIO_SRC_CNFG);
+
+		for (i = 0; i < (audio->channels + 1) / 2; i++) {
+			if (audio->sample_width == 16)
+				val = (0x08 << 8) | (0x08 << 20);
+			else if (audio->sample_width == 24)
+				val = (0x0b << 8) | (0x0b << 20);
+
+			val |= ((2 * i) << 4) | ((2 * i + 1) << 16);
+			writel(val, dp->regs + STTS_BIT_CH(i));
+		}
+
+		switch (audio->sample_rate) {
+		case 32000:
+			val = SAMPLING_FREQ(3) |
+			      ORIGINAL_SAMP_FREQ(0xc);
+			break;
+		case 44100:
+			val = SAMPLING_FREQ(0) |
+			      ORIGINAL_SAMP_FREQ(0xf);
+			break;
+		case 48000:
+			val = SAMPLING_FREQ(2) |
+			      ORIGINAL_SAMP_FREQ(0xd);
+			break;
+		case 88200:
+			val = SAMPLING_FREQ(8) |
+			      ORIGINAL_SAMP_FREQ(0x7);
+			break;
+		case 96000:
+			val = SAMPLING_FREQ(0xa) |
+			      ORIGINAL_SAMP_FREQ(5);
+			break;
+		case 176400:
+			val = SAMPLING_FREQ(0xc) |
+			      ORIGINAL_SAMP_FREQ(3);
+			break;
+		case 192000:
+			val = SAMPLING_FREQ(0xe) |
+			      ORIGINAL_SAMP_FREQ(1);
+			break;
+		}
+		val |= 4;
+		writel(val, dp->regs + COM_CH_STTS_BITS);
+
+		writel(2, dp->regs + SMPL2PKT_CNTL);
+		writel(2, dp->regs + AUDIO_SRC_CNTL);
+	} else {
+		val = 0x1F0707;
+		writel(val, dp->regs + SPDIF_CTRL_ADDR);
+
+		writel(SYNC_WR_TO_CH_ZERO, dp->regs + FIFO_CNTL);
+
+		val = 0x101 | (3 << 11);
+		writel(val, dp->regs + SMPL2PKT_CNFG);
+		writel(2, dp->regs + SMPL2PKT_CNTL);
+
+		val = 0x3F0707;
+		writel(val, dp->regs + SPDIF_CTRL_ADDR);
+	}
+
+	if (audio->format == AFMT_SPDIF) {
+		clk_prepare_enable(dp->spdif_clk);
+		clk_set_rate(dp->spdif_clk, 400000000);
+	}
+
+	return cdn_dp_reg_write(dp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN(1));
+}
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.h b/drivers/gpu/drm/rockchip/cdn-dp-reg.h
new file mode 100644
index 0000000..e775f12
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-reg.h
@@ -0,0 +1,404 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef _CDN_DP_REG_H
+#define _CDN_DP_REG_H
+
+#include <linux/bitops.h>
+
+#define ADDR_IMEM		0x10000
+#define ADDR_DMEM		0x20000
+
+/* APB CFG addr */
+#define APB_CTRL			0
+#define XT_INT_CTRL			0x04
+#define MAILBOX_FULL_ADDR		0x08
+#define MAILBOX_EMPTY_ADDR		0x0c
+#define MAILBOX0_WR_DATA		0x10
+#define MAILBOX0_RD_DATA		0x14
+#define KEEP_ALIVE			0x18
+#define VER_L				0x1c
+#define VER_H				0x20
+#define VER_LIB_L_ADDR			0x24
+#define VER_LIB_H_ADDR			0x28
+#define SW_DEBUG_L			0x2c
+#define SW_DEBUG_H			0x30
+#define MAILBOX_INT_MASK		0x34
+#define MAILBOX_INT_STATUS		0x38
+#define SW_CLK_L			0x3c
+#define SW_CLK_H			0x40
+#define SW_EVENTS0			0x44
+#define SW_EVENTS1			0x48
+#define SW_EVENTS2			0x4c
+#define SW_EVENTS3			0x50
+#define XT_OCD_CTRL			0x60
+#define APB_INT_MASK			0x6c
+#define APB_STATUS_MASK			0x70
+
+/* audio decoder addr */
+#define AUDIO_SRC_CNTL			0x30000
+#define AUDIO_SRC_CNFG			0x30004
+#define COM_CH_STTS_BITS		0x30008
+#define STTS_BIT_CH(x)			(0x3000c + ((x) << 2))
+#define SPDIF_CTRL_ADDR			0x3004c
+#define SPDIF_CH1_CS_3100_ADDR		0x30050
+#define SPDIF_CH1_CS_6332_ADDR		0x30054
+#define SPDIF_CH1_CS_9564_ADDR		0x30058
+#define SPDIF_CH1_CS_12796_ADDR		0x3005c
+#define SPDIF_CH1_CS_159128_ADDR	0x30060
+#define SPDIF_CH1_CS_191160_ADDR	0x30064
+#define SPDIF_CH2_CS_3100_ADDR		0x30068
+#define SPDIF_CH2_CS_6332_ADDR		0x3006c
+#define SPDIF_CH2_CS_9564_ADDR		0x30070
+#define SPDIF_CH2_CS_12796_ADDR		0x30074
+#define SPDIF_CH2_CS_159128_ADDR	0x30078
+#define SPDIF_CH2_CS_191160_ADDR	0x3007c
+#define SMPL2PKT_CNTL			0x30080
+#define SMPL2PKT_CNFG			0x30084
+#define FIFO_CNTL			0x30088
+#define FIFO_STTS			0x3008c
+
+/* source pif addr */
+#define SOURCE_PIF_WR_ADDR		0x30800
+#define SOURCE_PIF_WR_REQ		0x30804
+#define SOURCE_PIF_RD_ADDR		0x30808
+#define SOURCE_PIF_RD_REQ		0x3080c
+#define SOURCE_PIF_DATA_WR		0x30810
+#define SOURCE_PIF_DATA_RD		0x30814
+#define SOURCE_PIF_FIFO1_FLUSH		0x30818
+#define SOURCE_PIF_FIFO2_FLUSH		0x3081c
+#define SOURCE_PIF_STATUS		0x30820
+#define SOURCE_PIF_INTERRUPT_SOURCE	0x30824
+#define SOURCE_PIF_INTERRUPT_MASK	0x30828
+#define SOURCE_PIF_PKT_ALLOC_REG	0x3082c
+#define SOURCE_PIF_PKT_ALLOC_WR_EN	0x30830
+#define SOURCE_PIF_SW_RESET		0x30834
+
+/* bellow registers need access by mailbox */
+/* source car addr */
+#define SOURCE_HDTX_CAR			0x0900
+#define SOURCE_DPTX_CAR			0x0904
+#define SOURCE_PHY_CAR			0x0908
+#define SOURCE_CEC_CAR			0x090c
+#define SOURCE_CBUS_CAR			0x0910
+#define SOURCE_PKT_CAR			0x0918
+#define SOURCE_AIF_CAR			0x091c
+#define SOURCE_CIPHER_CAR		0x0920
+#define SOURCE_CRYPTO_CAR		0x0924
+
+/* clock meters addr */
+#define CM_CTRL				0x0a00
+#define CM_I2S_CTRL			0x0a04
+#define CM_SPDIF_CTRL			0x0a08
+#define CM_VID_CTRL			0x0a0c
+#define CM_LANE_CTRL			0x0a10
+#define I2S_NM_STABLE			0x0a14
+#define I2S_NCTS_STABLE			0x0a18
+#define SPDIF_NM_STABLE			0x0a1c
+#define SPDIF_NCTS_STABLE		0x0a20
+#define NMVID_MEAS_STABLE		0x0a24
+#define I2S_MEAS			0x0a40
+#define SPDIF_MEAS			0x0a80
+#define NMVID_MEAS			0x0ac0
+
+/* source vif addr */
+#define BND_HSYNC2VSYNC			0x0b00
+#define HSYNC2VSYNC_F1_L1		0x0b04
+#define HSYNC2VSYNC_F2_L1		0x0b08
+#define HSYNC2VSYNC_STATUS		0x0b0c
+#define HSYNC2VSYNC_POL_CTRL		0x0b10
+
+/* dptx phy addr */
+#define DP_TX_PHY_CONFIG_REG		0x2000
+#define DP_TX_PHY_STATUS_REG		0x2004
+#define DP_TX_PHY_SW_RESET		0x2008
+#define DP_TX_PHY_SCRAMBLER_SEED	0x200c
+#define DP_TX_PHY_TRAINING_01_04	0x2010
+#define DP_TX_PHY_TRAINING_05_08	0x2014
+#define DP_TX_PHY_TRAINING_09_10	0x2018
+#define TEST_COR			0x23fc
+
+/* dptx hpd addr */
+#define HPD_IRQ_DET_MIN_TIMER		0x2100
+#define HPD_IRQ_DET_MAX_TIMER		0x2104
+#define HPD_UNPLGED_DET_MIN_TIMER	0x2108
+#define HPD_STABLE_TIMER		0x210c
+#define HPD_FILTER_TIMER		0x2110
+#define HPD_EVENT_MASK			0x211c
+#define HPD_EVENT_DET			0x2120
+
+/* dpyx framer addr */
+#define DP_FRAMER_GLOBAL_CONFIG		0x2200
+#define DP_SW_RESET			0x2204
+#define DP_FRAMER_TU			0x2208
+#define DP_FRAMER_PXL_REPR		0x220c
+#define DP_FRAMER_SP			0x2210
+#define AUDIO_PACK_CONTROL		0x2214
+#define DP_VC_TABLE(x)			(0x2218 + ((x) << 2))
+#define DP_VB_ID			0x2258
+#define DP_MTPH_LVP_CONTROL		0x225c
+#define DP_MTPH_SYMBOL_VALUES		0x2260
+#define DP_MTPH_ECF_CONTROL		0x2264
+#define DP_MTPH_ACT_CONTROL		0x2268
+#define DP_MTPH_STATUS			0x226c
+#define DP_INTERRUPT_SOURCE		0x2270
+#define DP_INTERRUPT_MASK		0x2274
+#define DP_FRONT_BACK_PORCH		0x2278
+#define DP_BYTE_COUNT			0x227c
+
+/* dptx stream addr */
+#define MSA_HORIZONTAL_0		0x2280
+#define MSA_HORIZONTAL_1		0x2284
+#define MSA_VERTICAL_0			0x2288
+#define MSA_VERTICAL_1			0x228c
+#define MSA_MISC			0x2290
+#define STREAM_CONFIG			0x2294
+#define AUDIO_PACK_STATUS		0x2298
+#define VIF_STATUS			0x229c
+#define PCK_STUFF_STATUS_0		0x22a0
+#define PCK_STUFF_STATUS_1		0x22a4
+#define INFO_PACK_STATUS		0x22a8
+#define RATE_GOVERNOR_STATUS		0x22ac
+#define DP_HORIZONTAL			0x22b0
+#define DP_VERTICAL_0			0x22b4
+#define DP_VERTICAL_1			0x22b8
+#define DP_BLOCK_SDP			0x22bc
+
+/* dptx glbl addr */
+#define DPTX_LANE_EN			0x2300
+#define DPTX_ENHNCD			0x2304
+#define DPTX_INT_MASK			0x2308
+#define DPTX_INT_STATUS			0x230c
+
+/* dp aux addr */
+#define DP_AUX_HOST_CONTROL		0x2800
+#define DP_AUX_INTERRUPT_SOURCE		0x2804
+#define DP_AUX_INTERRUPT_MASK		0x2808
+#define DP_AUX_SWAP_INVERSION_CONTROL	0x280c
+#define DP_AUX_SEND_NACK_TRANSACTION	0x2810
+#define DP_AUX_CLEAR_RX			0x2814
+#define DP_AUX_CLEAR_TX			0x2818
+#define DP_AUX_TIMER_STOP		0x281c
+#define DP_AUX_TIMER_CLEAR		0x2820
+#define DP_AUX_RESET_SW			0x2824
+#define DP_AUX_DIVIDE_2M		0x2828
+#define DP_AUX_TX_PREACHARGE_LENGTH	0x282c
+#define DP_AUX_FREQUENCY_1M_MAX		0x2830
+#define DP_AUX_FREQUENCY_1M_MIN		0x2834
+#define DP_AUX_RX_PRE_MIN		0x2838
+#define DP_AUX_RX_PRE_MAX		0x283c
+#define DP_AUX_TIMER_PRESET		0x2840
+#define DP_AUX_NACK_FORMAT		0x2844
+#define DP_AUX_TX_DATA			0x2848
+#define DP_AUX_RX_DATA			0x284c
+#define DP_AUX_TX_STATUS		0x2850
+#define DP_AUX_RX_STATUS		0x2854
+#define DP_AUX_RX_CYCLE_COUNTER		0x2858
+#define DP_AUX_MAIN_STATES		0x285c
+#define DP_AUX_MAIN_TIMER		0x2860
+#define DP_AUX_AFE_OUT			0x2864
+
+/* crypto addr */
+#define CRYPTO_HDCP_REVISION		0x5800
+#define HDCP_CRYPTO_CONFIG		0x5804
+#define CRYPTO_INTERRUPT_SOURCE		0x5808
+#define CRYPTO_INTERRUPT_MASK		0x580c
+#define CRYPTO22_CONFIG			0x5818
+#define CRYPTO22_STATUS			0x581c
+#define SHA_256_DATA_IN			0x583c
+#define SHA_256_DATA_OUT_(x)		(0x5850 + ((x) << 2))
+#define AES_32_KEY_(x)			(0x5870 + ((x) << 2))
+#define AES_32_DATA_IN			0x5880
+#define AES_32_DATA_OUT_(x)		(0x5884 + ((x) << 2))
+#define CRYPTO14_CONFIG			0x58a0
+#define CRYPTO14_STATUS			0x58a4
+#define CRYPTO14_PRNM_OUT		0x58a8
+#define CRYPTO14_KM_0			0x58ac
+#define CRYPTO14_KM_1			0x58b0
+#define CRYPTO14_AN_0			0x58b4
+#define CRYPTO14_AN_1			0x58b8
+#define CRYPTO14_YOUR_KSV_0		0x58bc
+#define CRYPTO14_YOUR_KSV_1		0x58c0
+#define CRYPTO14_MI_0			0x58c4
+#define CRYPTO14_MI_1			0x58c8
+#define CRYPTO14_TI_0			0x58cc
+#define CRYPTO14_KI_0			0x58d0
+#define CRYPTO14_KI_1			0x58d4
+#define CRYPTO14_BLOCKS_NUM		0x58d8
+#define CRYPTO14_KEY_MEM_DATA_0		0x58dc
+#define CRYPTO14_KEY_MEM_DATA_1		0x58e0
+#define CRYPTO14_SHA1_MSG_DATA		0x58e4
+#define CRYPTO14_SHA1_V_VALUE_(x)	(0x58e8 + ((x) << 2))
+#define TRNG_CTRL			0x58fc
+#define TRNG_DATA_RDY			0x5900
+#define TRNG_DATA			0x5904
+
+/* cipher addr */
+#define HDCP_REVISION			0x60000
+#define INTERRUPT_SOURCE		0x60004
+#define INTERRUPT_MASK			0x60008
+#define HDCP_CIPHER_CONFIG		0x6000c
+#define AES_128_KEY_0			0x60010
+#define AES_128_KEY_1			0x60014
+#define AES_128_KEY_2			0x60018
+#define AES_128_KEY_3			0x6001c
+#define AES_128_RANDOM_0		0x60020
+#define AES_128_RANDOM_1		0x60024
+#define CIPHER14_KM_0			0x60028
+#define CIPHER14_KM_1			0x6002c
+#define CIPHER14_STATUS			0x60030
+#define CIPHER14_RI_PJ_STATUS		0x60034
+#define CIPHER_MODE			0x60038
+#define CIPHER14_AN_0			0x6003c
+#define CIPHER14_AN_1			0x60040
+#define CIPHER22_AUTH			0x60044
+#define CIPHER14_R0_DP_STATUS		0x60048
+#define CIPHER14_BOOTSTRAP		0x6004c
+
+#define APB_IRAM_PATH			BIT(2)
+#define APB_DRAM_PATH			BIT(1)
+#define APB_XT_RESET			BIT(0)
+
+/* mailbox */
+#define MB_OPCODE_ID			0
+#define MB_MODULE_ID			1
+#define MB_SIZE_MSB_ID			2
+#define MB_SIZE_LSB_ID			3
+#define MB_DATA_ID			4
+
+#define MB_MODULE_ID_DP_TX		0x01
+#define MB_MODULE_ID_HDCP_TX		0x07
+#define MB_MODULE_ID_HDCP_RX		0x08
+#define MB_MODULE_ID_HDCP_GENERAL	0x09
+#define MB_MODULE_ID_GENERAL		0x0a
+
+/* general opcode */
+#define GENERAL_MAIN_CONTROL            0x01
+#define GENERAL_TEST_ECHO               0x02
+#define GENERAL_BUS_SETTINGS            0x03
+#define GENERAL_TEST_ACCESS             0x04
+
+#define DPTX_SET_POWER_MNG			0x00
+#define DPTX_SET_HOST_CAPABILITIES		0x01
+#define DPTX_GET_EDID				0x02
+#define DPTX_READ_DPCD				0x03
+#define DPTX_WRITE_DPCD				0x04
+#define DPTX_ENABLE_EVENT			0x05
+#define DPTX_WRITE_REGISTER			0x06
+#define DPTX_READ_REGISTER			0x07
+#define DPTX_WRITE_FIELD			0x08
+#define DPTX_TRAINING_CONTROL			0x09
+#define DPTX_READ_EVENT				0x0a
+#define DPTX_READ_LINK_STAT			0x0b
+#define DPTX_SET_VIDEO				0x0c
+#define DPTX_SET_AUDIO				0x0d
+#define DPTX_GET_LAST_AUX_STAUS			0x0e
+#define DPTX_SET_LINK_BREAK_POINT		0x0f
+#define DPTX_FORCE_LANES			0x10
+#define DPTX_HPD_STATE				0x11
+
+#define DPTX_EVENT_ENABLE_HPD			BIT(0)
+#define DPTX_EVENT_ENABLE_TRAINING		BIT(1)
+
+#define LINK_TRAINING_NOT_ACTIVE		0
+#define LINK_TRAINING_RUN			1
+#define LINK_TRAINING_RESTART			2
+
+#define CONTROL_VIDEO_IDLE			0
+#define CONTROL_VIDEO_VALID			1
+
+#define VIF_BYPASS_INTERLACE			BIT(13)
+#define INTERLACE_FMT_DET			BIT(12)
+#define INTERLACE_DTCT_WIN			0x20
+
+#define DP_FRAMER_SP_INTERLACE_EN		BIT(2)
+#define DP_FRAMER_SP_HSP			BIT(1)
+#define DP_FRAMER_SP_VSP			BIT(0)
+
+/* capability */
+#define AUX_HOST_INVERT				3
+#define	FAST_LT_SUPPORT				1
+#define FAST_LT_NOT_SUPPORT			0
+#define LANE_MAPPING_NORMAL			0xe4
+#define LANE_MAPPING_FLIPPED			0x1b
+#define ENHANCED				1
+
+#define	FULL_LT_STARTED				BIT(0)
+#define FASE_LT_STARTED				BIT(1)
+#define CLK_RECOVERY_FINISHED			BIT(2)
+#define EQ_PHASE_FINISHED			BIT(3)
+#define FASE_LT_START_FINISHED			BIT(4)
+#define CLK_RECOVERY_FAILED			BIT(5)
+#define EQ_PHASE_FAILED				BIT(6)
+#define FASE_LT_FAILED				BIT(7)
+
+#define DPTX_HPD_EVENT				BIT(0)
+#define DPTX_TRAINING_EVENT			BIT(1)
+#define HDCP_TX_STATUS_EVENT			BIT(4)
+#define HDCP2_TX_IS_KM_STORED_EVENT		BIT(5)
+#define HDCP2_TX_STORE_KM_EVENT			BIT(6)
+#define HDCP_TX_IS_RECEIVER_ID_VALID_EVENT	BIT(7)
+
+#define EDID_LENGTH_BYTE			0
+#define EDID_SEGMENT_BUMBER			1
+#define EDID_DATA				2
+#define EDID_BLOCK_SIZE				128
+
+#define TU_SIZE					64
+
+/* audio */
+#define AUDIO_PACK_EN(x)			((x) << 8)
+#define SAMPLING_FREQ(x)			((x) << 16)
+#define ORIGINAL_SAMP_FREQ(x)			((x) << 24)
+#define SYNC_WR_TO_CH_ZERO			BIT(1)
+
+enum voltage_swing_level {
+	VOLTAGE_LEVEL_0,
+	VOLTAGE_LEVEL_1,
+	VOLTAGE_LEVEL_2,
+	VOLTAGE_LEVEL_3,
+};
+
+enum pre_emphasis_level {
+	PRE_EMPHASIS_LEVEL_0,
+	PRE_EMPHASIS_LEVEL_1,
+	PRE_EMPHASIS_LEVEL_2,
+	PRE_EMPHASIS_LEVEL_3,
+};
+
+enum pattern_set {
+	PRBS7		= BIT(0),
+	D10_2		= BIT(1),
+	TRAINING_PTN1	= BIT(2),
+	TRAINING_PTN2	= BIT(3),
+	DP_NONE		= BIT(4)
+};
+
+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,
+};
+
+enum VIC_COLOR_DEPTH {
+	BCS_6 = 0x1,
+	BCS_8 = 0x2,
+	BCS_10 = 0x4,
+	BCS_12 = 0x8,
+	BCS_16 = 0x10,
+};
+
+#endif /* _CDN_DP_REG_H */
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index edd7ec2..98302b3 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -969,7 +969,7 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
 		vop_dsp_hold_valid_irq_disable(vop);
 	}
 
-	pin_pol = 0x8;
+	pin_pol = (s->output_type == DRM_MODE_CONNECTOR_DisplayPort) ? 0 : 0x8;
 	pin_pol |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 0 : 1;
 	pin_pol |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? 0 : (1 << 1);
 	VOP_CTRL_SET(vop, pin_pol, pin_pol);
@@ -991,6 +991,10 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
 		VOP_CTRL_SET(vop, mipi_pin_pol, pin_pol);
 		VOP_CTRL_SET(vop, mipi_en, 1);
 		break;
+	case DRM_MODE_CONNECTOR_DisplayPort:
+		VOP_CTRL_SET(vop, dp_pin_pol, pin_pol);
+		VOP_CTRL_SET(vop, dp_en, 1);
+		break;
 	default:
 		DRM_ERROR("unsupport connector_type[%d]\n", s->output_type);
 	}
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index ff4f52e..50a045c 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -45,6 +45,7 @@ struct vop_ctrl {
 	struct vop_reg edp_en;
 	struct vop_reg hdmi_en;
 	struct vop_reg mipi_en;
+	struct vop_reg dp_en;
 	struct vop_reg out_mode;
 	struct vop_reg dither_down;
 	struct vop_reg dither_up;
@@ -53,6 +54,7 @@ struct vop_ctrl {
 	struct vop_reg hdmi_pin_pol;
 	struct vop_reg edp_pin_pol;
 	struct vop_reg mipi_pin_pol;
+	struct vop_reg dp_pin_pol;
 
 	struct vop_reg htotal_pw;
 	struct vop_reg hact_st_end;
diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
index 5b1ae1f..dcf172e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
+++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
@@ -281,6 +281,7 @@ static const struct vop_data rk3288_vop = {
 static const struct vop_ctrl rk3399_ctrl_data = {
 	.standby = VOP_REG(RK3399_SYS_CTRL, 0x1, 22),
 	.gate_en = VOP_REG(RK3399_SYS_CTRL, 0x1, 23),
+	.dp_en = VOP_REG(RK3399_SYS_CTRL, 0x1, 11),
 	.rgb_en = VOP_REG(RK3399_SYS_CTRL, 0x1, 12),
 	.hdmi_en = VOP_REG(RK3399_SYS_CTRL, 0x1, 13),
 	.edp_en = VOP_REG(RK3399_SYS_CTRL, 0x1, 14),
@@ -290,6 +291,7 @@ static const struct vop_ctrl rk3399_ctrl_data = {
 	.data_blank = VOP_REG(RK3399_DSP_CTRL0, 0x1, 19),
 	.out_mode = VOP_REG(RK3399_DSP_CTRL0, 0xf, 0),
 	.rgb_pin_pol = VOP_REG(RK3399_DSP_CTRL1, 0xf, 16),
+	.dp_pin_pol = VOP_REG(RK3399_DSP_CTRL1, 0xf, 16),
 	.hdmi_pin_pol = VOP_REG(RK3399_DSP_CTRL1, 0xf, 20),
 	.edp_pin_pol = VOP_REG(RK3399_DSP_CTRL1, 0xf, 24),
 	.mipi_pin_pol = VOP_REG(RK3399_DSP_CTRL1, 0xf, 28),