Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

14 files changed, 10226 insertions, 0 deletions

diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
new file mode 100644
index 000000000..173dada21
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_ANALOGIX_ANX6345
+	tristate "Analogix ANX6345 bridge"
+	depends on OF
+	select DRM_ANALOGIX_DP
+	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_HELPER
+	select DRM_KMS_HELPER
+	select REGMAP_I2C
+	help
+	  ANX6345 is an ultra-low power Full-HD DisplayPort/eDP
+	  transmitter designed for portable devices. The
+	  ANX6345 transforms the LVTTL RGB output of an
+	  application processor to eDP or DisplayPort.
+
+config DRM_ANALOGIX_ANX78XX
+	tristate "Analogix ANX78XX bridge"
+	select DRM_ANALOGIX_DP
+	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_HELPER
+	select DRM_KMS_HELPER
+	select REGMAP_I2C
+	help
+	  ANX78XX is an ultra-low power Full-HD SlimPort transmitter
+	  designed for portable devices. The ANX78XX transforms
+	  the HDMI output of an application processor to MyDP
+	  or DisplayPort.
+
+config DRM_ANALOGIX_DP
+	tristate
+	depends on DRM
+
+config DRM_ANALOGIX_ANX7625
+	tristate "Analogix Anx7625 MIPI to DP interface support"
+	depends on DRM
+	depends on OF
+	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_HDCP_HELPER
+	select DRM_DISPLAY_HELPER
+	select DRM_DP_AUX_BUS
+	select DRM_MIPI_DSI
+	help
+	  ANX7625 is an ultra-low power 4K mobile HD transmitter
+	  designed for portable devices. It converts MIPI/DPI to
+	  DisplayPort1.3 4K.
diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
new file mode 100644
index 000000000..44da392bb
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
+obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
new file mode 100644
index 000000000..c9e35731e
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
@@ -0,0 +1,826 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ * Copyright(c) 2017, Icenowy Zheng <icenowy@aosc.io>
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix-i2c-dptx.h"
+#include "analogix-i2c-txcommon.h"
+
+#define POLL_DELAY		50000 /* us */
+#define POLL_TIMEOUT		5000000 /* us */
+
+#define I2C_IDX_DPTX		0
+#define I2C_IDX_TXCOM		1
+
+static const u8 anx6345_i2c_addresses[] = {
+	[I2C_IDX_DPTX]	= 0x70,
+	[I2C_IDX_TXCOM]	= 0x72,
+};
+#define I2C_NUM_ADDRESSES	ARRAY_SIZE(anx6345_i2c_addresses)
+
+struct anx6345 {
+	struct drm_dp_aux aux;
+	struct drm_bridge bridge;
+	struct i2c_client *client;
+	struct edid *edid;
+	struct drm_connector connector;
+	struct drm_panel *panel;
+	struct regulator *dvdd12;
+	struct regulator *dvdd25;
+	struct gpio_desc *gpiod_reset;
+	struct mutex lock;	/* protect EDID access */
+
+	/* I2C Slave addresses of ANX6345 are mapped as DPTX and SYS */
+	struct i2c_client *i2c_clients[I2C_NUM_ADDRESSES];
+	struct regmap *map[I2C_NUM_ADDRESSES];
+
+	u16 chipid;
+	u8 dpcd[DP_RECEIVER_CAP_SIZE];
+
+	bool powered;
+};
+
+static inline struct anx6345 *connector_to_anx6345(struct drm_connector *c)
+{
+	return container_of(c, struct anx6345, connector);
+}
+
+static inline struct anx6345 *bridge_to_anx6345(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct anx6345, bridge);
+}
+
+static int anx6345_set_bits(struct regmap *map, u8 reg, u8 mask)
+{
+	return regmap_update_bits(map, reg, mask, mask);
+}
+
+static int anx6345_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+	return regmap_update_bits(map, reg, mask, 0);
+}
+
+static ssize_t anx6345_aux_transfer(struct drm_dp_aux *aux,
+				    struct drm_dp_aux_msg *msg)
+{
+	struct anx6345 *anx6345 = container_of(aux, struct anx6345, aux);
+
+	return anx_dp_aux_transfer(anx6345->map[I2C_IDX_DPTX], msg);
+}
+
+static int anx6345_dp_link_training(struct anx6345 *anx6345)
+{
+	unsigned int value;
+	u8 dp_bw, dpcd[2];
+	int err;
+
+	err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+				 SP_POWERDOWN_CTRL_REG,
+				 SP_TOTAL_PD);
+	if (err)
+		return err;
+
+	err = drm_dp_dpcd_readb(&anx6345->aux, DP_MAX_LINK_RATE, &dp_bw);
+	if (err < 0)
+		return err;
+
+	switch (dp_bw) {
+	case DP_LINK_BW_1_62:
+	case DP_LINK_BW_2_7:
+		break;
+
+	default:
+		DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw);
+		return -EINVAL;
+	}
+
+	err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+			       SP_VIDEO_MUTE);
+	if (err)
+		return err;
+
+	err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+				 SP_VID_CTRL1_REG, SP_VIDEO_EN);
+	if (err)
+		return err;
+
+	/* Get DPCD info */
+	err = drm_dp_dpcd_read(&anx6345->aux, DP_DPCD_REV,
+			       &anx6345->dpcd, DP_RECEIVER_CAP_SIZE);
+	if (err < 0) {
+		DRM_ERROR("Failed to read DPCD: %d\n", err);
+		return err;
+	}
+
+	/* Clear channel x SERDES power down */
+	err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
+				 SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+	if (err)
+		return err;
+
+	/*
+	 * Power up the sink (DP_SET_POWER register is only available on DPCD
+	 * v1.1 and later).
+	 */
+	if (anx6345->dpcd[DP_DPCD_REV] >= 0x11) {
+		err = drm_dp_dpcd_readb(&anx6345->aux, DP_SET_POWER, &dpcd[0]);
+		if (err < 0) {
+			DRM_ERROR("Failed to read DP_SET_POWER register: %d\n",
+				  err);
+			return err;
+		}
+
+		dpcd[0] &= ~DP_SET_POWER_MASK;
+		dpcd[0] |= DP_SET_POWER_D0;
+
+		err = drm_dp_dpcd_writeb(&anx6345->aux, DP_SET_POWER, dpcd[0]);
+		if (err < 0) {
+			DRM_ERROR("Failed to power up DisplayPort link: %d\n",
+				  err);
+			return err;
+		}
+
+		/*
+		 * According to the DP 1.1 specification, a "Sink Device must
+		 * exit the power saving state within 1 ms" (Section 2.5.3.1,
+		 * Table 5-52, "Sink Control Field" (register 0x600).
+		 */
+		usleep_range(1000, 2000);
+	}
+
+	/* Possibly enable downspread on the sink */
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+			   SP_DP_DOWNSPREAD_CTRL1_REG, 0);
+	if (err)
+		return err;
+
+	if (anx6345->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) {
+		DRM_DEBUG("Enable downspread on the sink\n");
+		/* 4000PPM */
+		err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+				   SP_DP_DOWNSPREAD_CTRL1_REG, 8);
+		if (err)
+			return err;
+
+		err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL,
+					 DP_SPREAD_AMP_0_5);
+		if (err < 0)
+			return err;
+	} else {
+		err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 0);
+		if (err < 0)
+			return err;
+	}
+
+	/* Set the lane count and the link rate on the sink */
+	if (drm_dp_enhanced_frame_cap(anx6345->dpcd))
+		err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+				       SP_DP_SYSTEM_CTRL_BASE + 4,
+				       SP_ENHANCED_MODE);
+	else
+		err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
+					 SP_DP_SYSTEM_CTRL_BASE + 4,
+					 SP_ENHANCED_MODE);
+	if (err)
+		return err;
+
+	dpcd[0] = dp_bw;
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+			   SP_DP_MAIN_LINK_BW_SET_REG, dpcd[0]);
+	if (err)
+		return err;
+
+	dpcd[1] = drm_dp_max_lane_count(anx6345->dpcd);
+
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+			   SP_DP_LANE_COUNT_SET_REG, dpcd[1]);
+	if (err)
+		return err;
+
+	if (drm_dp_enhanced_frame_cap(anx6345->dpcd))
+		dpcd[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+	err = drm_dp_dpcd_write(&anx6345->aux, DP_LINK_BW_SET, dpcd,
+				sizeof(dpcd));
+
+	if (err < 0) {
+		DRM_ERROR("Failed to configure link: %d\n", err);
+		return err;
+	}
+
+	/* Start training on the source */
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_LT_CTRL_REG,
+			   SP_LT_EN);
+	if (err)
+		return err;
+
+	return regmap_read_poll_timeout(anx6345->map[I2C_IDX_DPTX],
+				       SP_DP_LT_CTRL_REG,
+				       value, !(value & SP_DP_LT_INPROGRESS),
+				       POLL_DELAY, POLL_TIMEOUT);
+}
+
+static int anx6345_tx_initialization(struct anx6345 *anx6345)
+{
+	int err, i;
+
+	/* FIXME: colordepth is hardcoded for now */
+	err = regmap_write(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL2_REG,
+			   SP_IN_BPC_6BIT << SP_IN_BPC_SHIFT);
+	if (err)
+		return err;
+
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_PLL_CTRL_REG, 0);
+	if (err)
+		return err;
+
+	err = regmap_write(anx6345->map[I2C_IDX_TXCOM],
+			   SP_ANALOG_DEBUG1_REG, 0);
+	if (err)
+		return err;
+
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+			   SP_DP_LINK_DEBUG_CTRL_REG,
+			   SP_NEW_PRBS7 | SP_M_VID_DEBUG);
+	if (err)
+		return err;
+
+	err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+			   SP_DP_ANALOG_POWER_DOWN_REG, 0);
+	if (err)
+		return err;
+
+	/* Force HPD */
+	err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+			       SP_DP_SYSTEM_CTRL_BASE + 3,
+			       SP_HPD_FORCE | SP_HPD_CTRL);
+	if (err)
+		return err;
+
+	for (i = 0; i < 4; i++) {
+		/* 4 lanes */
+		err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+				   SP_DP_LANE0_LT_CTRL_REG + i, 0);
+		if (err)
+			return err;
+	}
+
+	/* Reset AUX */
+	err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM],
+			       SP_RESET_CTRL2_REG, SP_AUX_RST);
+	if (err)
+		return err;
+
+	return anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+				 SP_RESET_CTRL2_REG, SP_AUX_RST);
+}
+
+static void anx6345_poweron(struct anx6345 *anx6345)
+{
+	int err;
+
+	/* Ensure reset is asserted before starting power on sequence */
+	gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
+	usleep_range(1000, 2000);
+
+	err = regulator_enable(anx6345->dvdd12);
+	if (err) {
+		DRM_ERROR("Failed to enable dvdd12 regulator: %d\n",
+			  err);
+		return;
+	}
+
+	/* T1 - delay between VDD12 and VDD25 should be 0-2ms */
+	usleep_range(1000, 2000);
+
+	err = regulator_enable(anx6345->dvdd25);
+	if (err) {
+		DRM_ERROR("Failed to enable dvdd25 regulator: %d\n",
+			  err);
+		return;
+	}
+
+	/* T2 - delay between RESETN and all power rail stable,
+	 * should be 2-5ms
+	 */
+	usleep_range(2000, 5000);
+
+	gpiod_set_value_cansleep(anx6345->gpiod_reset, 0);
+
+	/* Power on registers module */
+	anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+			 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+	anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+			   SP_REGISTER_PD | SP_TOTAL_PD);
+
+	if (anx6345->panel)
+		drm_panel_prepare(anx6345->panel);
+
+	anx6345->powered = true;
+}
+
+static void anx6345_poweroff(struct anx6345 *anx6345)
+{
+	int err;
+
+	gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
+	usleep_range(1000, 2000);
+
+	if (anx6345->panel)
+		drm_panel_unprepare(anx6345->panel);
+
+	err = regulator_disable(anx6345->dvdd25);
+	if (err) {
+		DRM_ERROR("Failed to disable dvdd25 regulator: %d\n",
+			  err);
+		return;
+	}
+
+	usleep_range(5000, 10000);
+
+	err = regulator_disable(anx6345->dvdd12);
+	if (err) {
+		DRM_ERROR("Failed to disable dvdd12 regulator: %d\n",
+			  err);
+		return;
+	}
+
+	usleep_range(1000, 2000);
+
+	anx6345->powered = false;
+}
+
+static int anx6345_start(struct anx6345 *anx6345)
+{
+	int err;
+
+	if (!anx6345->powered)
+		anx6345_poweron(anx6345);
+
+	/* Power on needed modules */
+	err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+				SP_POWERDOWN_CTRL_REG,
+				SP_VIDEO_PD | SP_LINK_PD);
+
+	err = anx6345_tx_initialization(anx6345);
+	if (err) {
+		DRM_ERROR("Failed eDP transmitter initialization: %d\n", err);
+		anx6345_poweroff(anx6345);
+		return err;
+	}
+
+	err = anx6345_dp_link_training(anx6345);
+	if (err) {
+		DRM_ERROR("Failed link training: %d\n", err);
+		anx6345_poweroff(anx6345);
+		return err;
+	}
+
+	/*
+	 * This delay seems to help keep the hardware in a good state. Without
+	 * it, there are times where it fails silently.
+	 */
+	usleep_range(10000, 15000);
+
+	return 0;
+}
+
+static int anx6345_config_dp_output(struct anx6345 *anx6345)
+{
+	int err;
+
+	err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+				 SP_VIDEO_MUTE);
+	if (err)
+		return err;
+
+	/* Enable DP output */
+	err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+			       SP_VIDEO_EN);
+	if (err)
+		return err;
+
+	/* Force stream valid */
+	return anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+			       SP_DP_SYSTEM_CTRL_BASE + 3,
+			       SP_STRM_FORCE | SP_STRM_CTRL);
+}
+
+static int anx6345_get_downstream_info(struct anx6345 *anx6345)
+{
+	u8 value;
+	int err;
+
+	err = drm_dp_dpcd_readb(&anx6345->aux, DP_SINK_COUNT, &value);
+	if (err < 0) {
+		DRM_ERROR("Get sink count failed %d\n", err);
+		return err;
+	}
+
+	if (!DP_GET_SINK_COUNT(value)) {
+		DRM_ERROR("Downstream disconnected\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int anx6345_get_modes(struct drm_connector *connector)
+{
+	struct anx6345 *anx6345 = connector_to_anx6345(connector);
+	int err, num_modes = 0;
+	bool power_off = false;
+
+	mutex_lock(&anx6345->lock);
+
+	if (!anx6345->edid) {
+		if (!anx6345->powered) {
+			anx6345_poweron(anx6345);
+			power_off = true;
+		}
+
+		err = anx6345_get_downstream_info(anx6345);
+		if (err) {
+			DRM_ERROR("Failed to get downstream info: %d\n", err);
+			goto unlock;
+		}
+
+		anx6345->edid = drm_get_edid(connector, &anx6345->aux.ddc);
+		if (!anx6345->edid)
+			DRM_ERROR("Failed to read EDID from panel\n");
+
+		err = drm_connector_update_edid_property(connector,
+							 anx6345->edid);
+		if (err) {
+			DRM_ERROR("Failed to update EDID property: %d\n", err);
+			goto unlock;
+		}
+	}
+
+	num_modes += drm_add_edid_modes(connector, anx6345->edid);
+
+	/* Driver currently supports only 6bpc */
+	connector->display_info.bpc = 6;
+
+unlock:
+	if (power_off)
+		anx6345_poweroff(anx6345);
+
+	mutex_unlock(&anx6345->lock);
+
+	if (!num_modes && anx6345->panel)
+		num_modes += drm_panel_get_modes(anx6345->panel, connector);
+
+	return num_modes;
+}
+
+static const struct drm_connector_helper_funcs anx6345_connector_helper_funcs = {
+	.get_modes = anx6345_get_modes,
+};
+
+static void
+anx6345_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs anx6345_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = anx6345_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int anx6345_bridge_attach(struct drm_bridge *bridge,
+				 enum drm_bridge_attach_flags flags)
+{
+	struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+	int err;
+
+	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+		DRM_ERROR("Fix bridge driver to make connector optional!");
+		return -EINVAL;
+	}
+
+	if (!bridge->encoder) {
+		DRM_ERROR("Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	/* Register aux channel */
+	anx6345->aux.name = "DP-AUX";
+	anx6345->aux.dev = &anx6345->client->dev;
+	anx6345->aux.drm_dev = bridge->dev;
+	anx6345->aux.transfer = anx6345_aux_transfer;
+
+	err = drm_dp_aux_register(&anx6345->aux);
+	if (err < 0) {
+		DRM_ERROR("Failed to register aux channel: %d\n", err);
+		return err;
+	}
+
+	err = drm_connector_init(bridge->dev, &anx6345->connector,
+				 &anx6345_connector_funcs,
+				 DRM_MODE_CONNECTOR_eDP);
+	if (err) {
+		DRM_ERROR("Failed to initialize connector: %d\n", err);
+		goto aux_unregister;
+	}
+
+	drm_connector_helper_add(&anx6345->connector,
+				 &anx6345_connector_helper_funcs);
+
+	anx6345->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+	err = drm_connector_attach_encoder(&anx6345->connector,
+					   bridge->encoder);
+	if (err) {
+		DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
+		goto connector_cleanup;
+	}
+
+	err = drm_connector_register(&anx6345->connector);
+	if (err) {
+		DRM_ERROR("Failed to register connector: %d\n", err);
+		goto connector_cleanup;
+	}
+
+	return 0;
+connector_cleanup:
+	drm_connector_cleanup(&anx6345->connector);
+aux_unregister:
+	drm_dp_aux_unregister(&anx6345->aux);
+	return err;
+}
+
+static void anx6345_bridge_detach(struct drm_bridge *bridge)
+{
+	drm_dp_aux_unregister(&bridge_to_anx6345(bridge)->aux);
+}
+
+static enum drm_mode_status
+anx6345_bridge_mode_valid(struct drm_bridge *bridge,
+			  const struct drm_display_info *info,
+			  const struct drm_display_mode *mode)
+{
+	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+		return MODE_NO_INTERLACE;
+
+	/* Max 1200p at 5.4 Ghz, one lane */
+	if (mode->clock > 154000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static void anx6345_bridge_disable(struct drm_bridge *bridge)
+{
+	struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+
+	/* Power off all modules except configuration registers access */
+	anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+			 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+	if (anx6345->panel)
+		drm_panel_disable(anx6345->panel);
+
+	if (anx6345->powered)
+		anx6345_poweroff(anx6345);
+}
+
+static void anx6345_bridge_enable(struct drm_bridge *bridge)
+{
+	struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+	int err;
+
+	if (anx6345->panel)
+		drm_panel_enable(anx6345->panel);
+
+	err = anx6345_start(anx6345);
+	if (err) {
+		DRM_ERROR("Failed to initialize: %d\n", err);
+		return;
+	}
+
+	err = anx6345_config_dp_output(anx6345);
+	if (err)
+		DRM_ERROR("Failed to enable DP output: %d\n", err);
+}
+
+static const struct drm_bridge_funcs anx6345_bridge_funcs = {
+	.attach = anx6345_bridge_attach,
+	.detach = anx6345_bridge_detach,
+	.mode_valid = anx6345_bridge_mode_valid,
+	.disable = anx6345_bridge_disable,
+	.enable = anx6345_bridge_enable,
+};
+
+static void unregister_i2c_dummy_clients(struct anx6345 *anx6345)
+{
+	unsigned int i;
+
+	for (i = 1; i < ARRAY_SIZE(anx6345->i2c_clients); i++)
+		if (anx6345->i2c_clients[i] &&
+		    anx6345->i2c_clients[i]->addr != anx6345->client->addr)
+			i2c_unregister_device(anx6345->i2c_clients[i]);
+}
+
+static const struct regmap_config anx6345_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xff,
+	.cache_type = REGCACHE_NONE,
+};
+
+static const u16 anx6345_chipid_list[] = {
+	0x6345,
+};
+
+static bool anx6345_get_chip_id(struct anx6345 *anx6345)
+{
+	unsigned int i, idl, idh, version;
+
+	if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDL_REG, &idl))
+		return false;
+
+	if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDH_REG, &idh))
+		return false;
+
+	anx6345->chipid = (u8)idl | ((u8)idh << 8);
+
+	if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_VERSION_REG,
+			&version))
+		return false;
+
+	for (i = 0; i < ARRAY_SIZE(anx6345_chipid_list); i++) {
+		if (anx6345->chipid == anx6345_chipid_list[i]) {
+			DRM_INFO("Found ANX%x (ver. %d) eDP Transmitter\n",
+				 anx6345->chipid, version);
+			return true;
+		}
+	}
+
+	DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
+		  anx6345->chipid, version);
+
+	return false;
+}
+
+static int anx6345_i2c_probe(struct i2c_client *client)
+{
+	struct anx6345 *anx6345;
+	struct device *dev;
+	int i, err;
+
+	anx6345 = devm_kzalloc(&client->dev, sizeof(*anx6345), GFP_KERNEL);
+	if (!anx6345)
+		return -ENOMEM;
+
+	mutex_init(&anx6345->lock);
+
+	anx6345->bridge.of_node = client->dev.of_node;
+
+	anx6345->client = client;
+	i2c_set_clientdata(client, anx6345);
+
+	dev = &anx6345->client->dev;
+
+	err = drm_of_find_panel_or_bridge(client->dev.of_node, 1, 0,
+					  &anx6345->panel, NULL);
+	if (err == -EPROBE_DEFER)
+		return err;
+
+	if (err)
+		DRM_DEBUG("No panel found\n");
+
+	/* 1.2V digital core power regulator  */
+	anx6345->dvdd12 = devm_regulator_get(dev, "dvdd12");
+	if (IS_ERR(anx6345->dvdd12)) {
+		if (PTR_ERR(anx6345->dvdd12) != -EPROBE_DEFER)
+			DRM_ERROR("Failed to get dvdd12 supply (%ld)\n",
+				  PTR_ERR(anx6345->dvdd12));
+		return PTR_ERR(anx6345->dvdd12);
+	}
+
+	/* 2.5V digital core power regulator  */
+	anx6345->dvdd25 = devm_regulator_get(dev, "dvdd25");
+	if (IS_ERR(anx6345->dvdd25)) {
+		if (PTR_ERR(anx6345->dvdd25) != -EPROBE_DEFER)
+			DRM_ERROR("Failed to get dvdd25 supply (%ld)\n",
+				  PTR_ERR(anx6345->dvdd25));
+		return PTR_ERR(anx6345->dvdd25);
+	}
+
+	/* GPIO for chip reset */
+	anx6345->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(anx6345->gpiod_reset)) {
+		DRM_ERROR("Reset gpio not found\n");
+		return PTR_ERR(anx6345->gpiod_reset);
+	}
+
+	/* Map slave addresses of ANX6345 */
+	for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
+		if (anx6345_i2c_addresses[i] >> 1 != client->addr)
+			anx6345->i2c_clients[i] = i2c_new_dummy_device(client->adapter,
+						anx6345_i2c_addresses[i] >> 1);
+		else
+			anx6345->i2c_clients[i] = client;
+
+		if (IS_ERR(anx6345->i2c_clients[i])) {
+			err = PTR_ERR(anx6345->i2c_clients[i]);
+			DRM_ERROR("Failed to reserve I2C bus %02x\n",
+				  anx6345_i2c_addresses[i]);
+			goto err_unregister_i2c;
+		}
+
+		anx6345->map[i] = devm_regmap_init_i2c(anx6345->i2c_clients[i],
+						       &anx6345_regmap_config);
+		if (IS_ERR(anx6345->map[i])) {
+			err = PTR_ERR(anx6345->map[i]);
+			DRM_ERROR("Failed regmap initialization %02x\n",
+				  anx6345_i2c_addresses[i]);
+			goto err_unregister_i2c;
+		}
+	}
+
+	/* Look for supported chip ID */
+	anx6345_poweron(anx6345);
+	if (anx6345_get_chip_id(anx6345)) {
+		anx6345->bridge.funcs = &anx6345_bridge_funcs;
+		drm_bridge_add(&anx6345->bridge);
+
+		return 0;
+	} else {
+		anx6345_poweroff(anx6345);
+		err = -ENODEV;
+	}
+
+err_unregister_i2c:
+	unregister_i2c_dummy_clients(anx6345);
+	return err;
+}
+
+static void anx6345_i2c_remove(struct i2c_client *client)
+{
+	struct anx6345 *anx6345 = i2c_get_clientdata(client);
+
+	drm_bridge_remove(&anx6345->bridge);
+
+	unregister_i2c_dummy_clients(anx6345);
+
+	kfree(anx6345->edid);
+
+	mutex_destroy(&anx6345->lock);
+}
+
+static const struct i2c_device_id anx6345_id[] = {
+	{ "anx6345", 0 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, anx6345_id);
+
+static const struct of_device_id anx6345_match_table[] = {
+	{ .compatible = "analogix,anx6345", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, anx6345_match_table);
+
+static struct i2c_driver anx6345_driver = {
+	.driver = {
+		   .name = "anx6345",
+		   .of_match_table = anx6345_match_table,
+		  },
+	.probe = anx6345_i2c_probe,
+	.remove = anx6345_i2c_remove,
+	.id_table = anx6345_id,
+};
+module_i2c_driver(anx6345_driver);
+
+MODULE_DESCRIPTION("ANX6345 eDP Transmitter driver");
+MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
new file mode 100644
index 000000000..800555aef
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
@@ -0,0 +1,1398 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix-anx78xx.h"
+
+#define I2C_NUM_ADDRESSES	5
+#define I2C_IDX_TX_P0		0
+#define I2C_IDX_TX_P1		1
+#define I2C_IDX_TX_P2		2
+#define I2C_IDX_RX_P0		3
+#define I2C_IDX_RX_P1		4
+
+#define XTAL_CLK		270 /* 27M */
+
+static const u8 anx7808_i2c_addresses[] = {
+	[I2C_IDX_TX_P0] = 0x78,
+	[I2C_IDX_TX_P1] = 0x7a,
+	[I2C_IDX_TX_P2] = 0x72,
+	[I2C_IDX_RX_P0] = 0x7e,
+	[I2C_IDX_RX_P1] = 0x80,
+};
+
+static const u8 anx781x_i2c_addresses[] = {
+	[I2C_IDX_TX_P0] = 0x70,
+	[I2C_IDX_TX_P1] = 0x7a,
+	[I2C_IDX_TX_P2] = 0x72,
+	[I2C_IDX_RX_P0] = 0x7e,
+	[I2C_IDX_RX_P1] = 0x80,
+};
+
+struct anx78xx_platform_data {
+	struct regulator *dvdd10;
+	struct gpio_desc *gpiod_hpd;
+	struct gpio_desc *gpiod_pd;
+	struct gpio_desc *gpiod_reset;
+
+	int hpd_irq;
+	int intp_irq;
+};
+
+struct anx78xx {
+	struct drm_dp_aux aux;
+	struct drm_bridge bridge;
+	struct i2c_client *client;
+	struct edid *edid;
+	struct drm_connector connector;
+	struct anx78xx_platform_data pdata;
+	struct mutex lock;
+
+	/*
+	 * I2C Slave addresses of ANX7814 are mapped as TX_P0, TX_P1, TX_P2,
+	 * RX_P0 and RX_P1.
+	 */
+	struct i2c_client *i2c_dummy[I2C_NUM_ADDRESSES];
+	struct regmap *map[I2C_NUM_ADDRESSES];
+
+	u16 chipid;
+	u8 dpcd[DP_RECEIVER_CAP_SIZE];
+
+	bool powered;
+};
+
+static inline struct anx78xx *connector_to_anx78xx(struct drm_connector *c)
+{
+	return container_of(c, struct anx78xx, connector);
+}
+
+static inline struct anx78xx *bridge_to_anx78xx(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct anx78xx, bridge);
+}
+
+static int anx78xx_set_bits(struct regmap *map, u8 reg, u8 mask)
+{
+	return regmap_update_bits(map, reg, mask, mask);
+}
+
+static int anx78xx_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+	return regmap_update_bits(map, reg, mask, 0);
+}
+
+static ssize_t anx78xx_aux_transfer(struct drm_dp_aux *aux,
+				    struct drm_dp_aux_msg *msg)
+{
+	struct anx78xx *anx78xx = container_of(aux, struct anx78xx, aux);
+	return anx_dp_aux_transfer(anx78xx->map[I2C_IDX_TX_P0], msg);
+}
+
+static int anx78xx_set_hpd(struct anx78xx *anx78xx)
+{
+	int err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+				 SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+			       SP_HPD_OUT);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_clear_hpd(struct anx78xx *anx78xx)
+{
+	int err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+				 SP_HPD_OUT);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+			       SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const struct reg_sequence tmds_phy_initialization[] = {
+	{ SP_TMDS_CTRL_BASE +  1, 0x90 },
+	{ SP_TMDS_CTRL_BASE +  2, 0xa9 },
+	{ SP_TMDS_CTRL_BASE +  6, 0x92 },
+	{ SP_TMDS_CTRL_BASE +  7, 0x80 },
+	{ SP_TMDS_CTRL_BASE + 20, 0xf2 },
+	{ SP_TMDS_CTRL_BASE + 22, 0xc4 },
+	{ SP_TMDS_CTRL_BASE + 23, 0x18 },
+};
+
+static int anx78xx_rx_initialization(struct anx78xx *anx78xx)
+{
+	int err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+			   SP_AUD_MUTE | SP_VID_MUTE);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_CHIP_CTRL_REG,
+			       SP_MAN_HDMI5V_DET | SP_PLLLOCK_CKDT_EN |
+			       SP_DIGITAL_CKDT_EN);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+			       SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
+			       SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
+	if (err)
+		return err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+				 SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
+				 SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
+	if (err)
+		return err;
+
+	/* Sync detect change, GP set mute */
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+			       SP_AUD_EXCEPTION_ENABLE_BASE + 1, BIT(5) |
+			       BIT(6));
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+			       SP_AUD_EXCEPTION_ENABLE_BASE + 3,
+			       SP_AEC_EN21);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_AUDVID_CTRL_REG,
+			       SP_AVC_EN | SP_AAC_OE | SP_AAC_EN);
+	if (err)
+		return err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+				 SP_SYSTEM_POWER_DOWN1_REG, SP_PWDN_CTRL);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+			       SP_VID_DATA_RANGE_CTRL_REG, SP_R2Y_INPUT_LIMIT);
+	if (err)
+		return err;
+
+	/* Enable DDC stretch */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_DP_EXTRA_I2C_DEV_ADDR_REG, SP_I2C_EXTRA_ADDR);
+	if (err)
+		return err;
+
+	/* TMDS phy initialization */
+	err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_RX_P0],
+				     tmds_phy_initialization,
+				     ARRAY_SIZE(tmds_phy_initialization));
+	if (err)
+		return err;
+
+	err = anx78xx_clear_hpd(anx78xx);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const u8 dp_tx_output_precise_tune_bits[20] = {
+	0x01, 0x03, 0x07, 0x7f, 0x71, 0x6b, 0x7f,
+	0x73, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00,
+	0x0c, 0x42, 0x1e, 0x3e, 0x72, 0x7e,
+};
+
+static int anx78xx_link_phy_initialization(struct anx78xx *anx78xx)
+{
+	int err;
+
+	/*
+	 * REVISIT : It is writing to a RESERVED bits in Analog Control 0
+	 * register.
+	 */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_ANALOG_CTRL0_REG,
+			   0x02);
+	if (err)
+		return err;
+
+	/*
+	 * Write DP TX output emphasis precise tune bits.
+	 */
+	err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P1],
+				SP_DP_TX_LT_CTRL0_REG,
+				dp_tx_output_precise_tune_bits,
+				ARRAY_SIZE(dp_tx_output_precise_tune_bits));
+
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_xtal_clk_sel(struct anx78xx *anx78xx)
+{
+	unsigned int value;
+	int err;
+
+	err = regmap_update_bits(anx78xx->map[I2C_IDX_TX_P2],
+				 SP_ANALOG_DEBUG2_REG,
+				 SP_XTAL_FRQ | SP_FORCE_SW_OFF_BYPASS,
+				 SP_XTAL_FRQ_27M);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL3_REG,
+			   XTAL_CLK & SP_WAIT_COUNTER_7_0_MASK);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL4_REG,
+			   ((XTAL_CLK & 0xff00) >> 2) | (XTAL_CLK / 10));
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_I2C_GEN_10US_TIMER0_REG, XTAL_CLK & 0xff);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_I2C_GEN_10US_TIMER1_REG,
+			   (XTAL_CLK & 0xff00) >> 8);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_MISC_CTRL_REG,
+			   XTAL_CLK / 10 - 1);
+	if (err)
+		return err;
+
+	err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
+			  SP_HDMI_US_TIMER_CTRL_REG,
+			  &value);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_RX_P0],
+			   SP_HDMI_US_TIMER_CTRL_REG,
+			   (value & SP_MS_TIMER_MARGIN_10_8_MASK) |
+			   ((((XTAL_CLK / 10) >> 1) - 2) << 3));
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const struct reg_sequence otp_key_protect[] = {
+	{ SP_OTP_KEY_PROTECT1_REG, SP_OTP_PSW1 },
+	{ SP_OTP_KEY_PROTECT2_REG, SP_OTP_PSW2 },
+	{ SP_OTP_KEY_PROTECT3_REG, SP_OTP_PSW3 },
+};
+
+static int anx78xx_tx_initialization(struct anx78xx *anx78xx)
+{
+	int err;
+
+	/* Set terminal resistor to 50 ohm */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL2_REG,
+			   0x30);
+	if (err)
+		return err;
+
+	/* Enable aux double diff output */
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_AUX_CH_CTRL2_REG, 0x08);
+	if (err)
+		return err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+				 SP_DP_HDCP_CTRL_REG, SP_AUTO_EN |
+				 SP_AUTO_START);
+	if (err)
+		return err;
+
+	err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_TX_P0],
+				     otp_key_protect,
+				     ARRAY_SIZE(otp_key_protect));
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_HDCP_KEY_COMMAND_REG, SP_DISABLE_SYNC_HDCP);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL8_REG,
+			   SP_VID_VRES_TH);
+	if (err)
+		return err;
+
+	/*
+	 * DP HDCP auto authentication wait timer (when downstream starts to
+	 * auth, DP side will wait for this period then do auth automatically)
+	 */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_HDCP_AUTO_TIMER_REG,
+			   0x00);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_HDCP_CTRL_REG, SP_LINK_POLLING);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_LINK_DEBUG_CTRL_REG, SP_M_VID_DEBUG);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2],
+			       SP_ANALOG_DEBUG2_REG, SP_POWERON_TIME_1P5MS);
+	if (err)
+		return err;
+
+	err = anx78xx_xtal_clk_sel(anx78xx);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_DEFER_CTRL_REG,
+			   SP_DEFER_CTRL_EN | 0x0c);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_POLLING_CTRL_REG,
+			       SP_AUTO_POLLING_DISABLE);
+	if (err)
+		return err;
+
+	/*
+	 * Short the link integrity check timer to speed up bstatus
+	 * polling for HDCP CTS item 1A-07
+	 */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_HDCP_LINK_CHECK_TIMER_REG, 0x1d);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_MISC_CTRL_REG, SP_EQ_TRAINING_LOOP);
+	if (err)
+		return err;
+
+	/* Power down the main link by default */
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+	if (err)
+		return err;
+
+	err = anx78xx_link_phy_initialization(anx78xx);
+	if (err)
+		return err;
+
+	/* Gen m_clk with downspreading */
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_DP_M_CALCULATION_CTRL_REG, SP_M_GEN_CLK_SEL);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_enable_interrupts(struct anx78xx *anx78xx)
+{
+	int err;
+
+	/*
+	 * BIT0: INT pin assertion polarity: 1 = assert high
+	 * BIT1: INT pin output type: 0 = push/pull
+	 */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_INT_CTRL_REG, 0x01);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
+			   SP_COMMON_INT_MASK4_REG, SP_HPD_LOST | SP_HPD_PLUG);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_MASK1_REG,
+			   SP_TRAINING_FINISH);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_MASK1_REG,
+			   SP_CKDT_CHG | SP_SCDT_CHG);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static void anx78xx_poweron(struct anx78xx *anx78xx)
+{
+	struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+	int err;
+
+	if (WARN_ON(anx78xx->powered))
+		return;
+
+	if (pdata->dvdd10) {
+		err = regulator_enable(pdata->dvdd10);
+		if (err) {
+			DRM_ERROR("Failed to enable DVDD10 regulator: %d\n",
+				  err);
+			return;
+		}
+
+		usleep_range(1000, 2000);
+	}
+
+	gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
+	usleep_range(1000, 2000);
+
+	gpiod_set_value_cansleep(pdata->gpiod_pd, 0);
+	usleep_range(1000, 2000);
+
+	gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
+
+	/* Power on registers module */
+	anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+			 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+	anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+			   SP_REGISTER_PD | SP_TOTAL_PD);
+
+	anx78xx->powered = true;
+}
+
+static void anx78xx_poweroff(struct anx78xx *anx78xx)
+{
+	struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+	int err;
+
+	if (WARN_ON(!anx78xx->powered))
+		return;
+
+	gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
+	usleep_range(1000, 2000);
+
+	gpiod_set_value_cansleep(pdata->gpiod_pd, 1);
+	usleep_range(1000, 2000);
+
+	if (pdata->dvdd10) {
+		err = regulator_disable(pdata->dvdd10);
+		if (err) {
+			DRM_ERROR("Failed to disable DVDD10 regulator: %d\n",
+				  err);
+			return;
+		}
+
+		usleep_range(1000, 2000);
+	}
+
+	anx78xx->powered = false;
+}
+
+static int anx78xx_start(struct anx78xx *anx78xx)
+{
+	int err;
+
+	/* Power on all modules */
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+				 SP_POWERDOWN_CTRL_REG,
+				 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD |
+				 SP_LINK_PD);
+
+	err = anx78xx_enable_interrupts(anx78xx);
+	if (err) {
+		DRM_ERROR("Failed to enable interrupts: %d\n", err);
+		goto err_poweroff;
+	}
+
+	err = anx78xx_rx_initialization(anx78xx);
+	if (err) {
+		DRM_ERROR("Failed receiver initialization: %d\n", err);
+		goto err_poweroff;
+	}
+
+	err = anx78xx_tx_initialization(anx78xx);
+	if (err) {
+		DRM_ERROR("Failed transmitter initialization: %d\n", err);
+		goto err_poweroff;
+	}
+
+	/*
+	 * This delay seems to help keep the hardware in a good state. Without
+	 * it, there are times where it fails silently.
+	 */
+	usleep_range(10000, 15000);
+
+	return 0;
+
+err_poweroff:
+	DRM_ERROR("Failed SlimPort transmitter initialization: %d\n", err);
+	anx78xx_poweroff(anx78xx);
+
+	return err;
+}
+
+static int anx78xx_init_pdata(struct anx78xx *anx78xx)
+{
+	struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+	struct device *dev = &anx78xx->client->dev;
+
+	/* 1.0V digital core power regulator  */
+	pdata->dvdd10 = devm_regulator_get(dev, "dvdd10");
+	if (IS_ERR(pdata->dvdd10)) {
+		if (PTR_ERR(pdata->dvdd10) != -EPROBE_DEFER)
+			DRM_ERROR("DVDD10 regulator not found\n");
+
+		return PTR_ERR(pdata->dvdd10);
+	}
+
+	/* GPIO for HPD */
+	pdata->gpiod_hpd = devm_gpiod_get(dev, "hpd", GPIOD_IN);
+	if (IS_ERR(pdata->gpiod_hpd))
+		return PTR_ERR(pdata->gpiod_hpd);
+
+	/* GPIO for chip power down */
+	pdata->gpiod_pd = devm_gpiod_get(dev, "pd", GPIOD_OUT_HIGH);
+	if (IS_ERR(pdata->gpiod_pd))
+		return PTR_ERR(pdata->gpiod_pd);
+
+	/* GPIO for chip reset */
+	pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+
+	return PTR_ERR_OR_ZERO(pdata->gpiod_reset);
+}
+
+static int anx78xx_dp_link_training(struct anx78xx *anx78xx)
+{
+	u8 dp_bw, dpcd[2];
+	int err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+			   0x0);
+	if (err)
+		return err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+				 SP_POWERDOWN_CTRL_REG,
+				 SP_TOTAL_PD);
+	if (err)
+		return err;
+
+	err = drm_dp_dpcd_readb(&anx78xx->aux, DP_MAX_LINK_RATE, &dp_bw);
+	if (err < 0)
+		return err;
+
+	switch (dp_bw) {
+	case DP_LINK_BW_1_62:
+	case DP_LINK_BW_2_7:
+	case DP_LINK_BW_5_4:
+		break;
+
+	default:
+		DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw);
+		return -EINVAL;
+	}
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+			       SP_VIDEO_MUTE);
+	if (err)
+		return err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+				 SP_VID_CTRL1_REG, SP_VIDEO_EN);
+	if (err)
+		return err;
+
+	/* Get DPCD info */
+	err = drm_dp_dpcd_read(&anx78xx->aux, DP_DPCD_REV,
+			       &anx78xx->dpcd, DP_RECEIVER_CAP_SIZE);
+	if (err < 0) {
+		DRM_ERROR("Failed to read DPCD: %d\n", err);
+		return err;
+	}
+
+	/* Clear channel x SERDES power down */
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+				 SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+	if (err)
+		return err;
+
+	/*
+	 * Power up the sink (DP_SET_POWER register is only available on DPCD
+	 * v1.1 and later).
+	 */
+	if (anx78xx->dpcd[DP_DPCD_REV] >= 0x11) {
+		err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SET_POWER, &dpcd[0]);
+		if (err < 0) {
+			DRM_ERROR("Failed to read DP_SET_POWER register: %d\n",
+				  err);
+			return err;
+		}
+
+		dpcd[0] &= ~DP_SET_POWER_MASK;
+		dpcd[0] |= DP_SET_POWER_D0;
+
+		err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_SET_POWER, dpcd[0]);
+		if (err < 0) {
+			DRM_ERROR("Failed to power up DisplayPort link: %d\n",
+				  err);
+			return err;
+		}
+
+		/*
+		 * According to the DP 1.1 specification, a "Sink Device must
+		 * exit the power saving state within 1 ms" (Section 2.5.3.1,
+		 * Table 5-52, "Sink Control Field" (register 0x600).
+		 */
+		usleep_range(1000, 2000);
+	}
+
+	/* Possibly enable downspread on the sink */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_DP_DOWNSPREAD_CTRL1_REG, 0);
+	if (err)
+		return err;
+
+	if (anx78xx->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) {
+		DRM_DEBUG("Enable downspread on the sink\n");
+		/* 4000PPM */
+		err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+				   SP_DP_DOWNSPREAD_CTRL1_REG, 8);
+		if (err)
+			return err;
+
+		err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL,
+					 DP_SPREAD_AMP_0_5);
+		if (err < 0)
+			return err;
+	} else {
+		err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL, 0);
+		if (err < 0)
+			return err;
+	}
+
+	/* Set the lane count and the link rate on the sink */
+	if (drm_dp_enhanced_frame_cap(anx78xx->dpcd))
+		err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+				       SP_DP_SYSTEM_CTRL_BASE + 4,
+				       SP_ENHANCED_MODE);
+	else
+		err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+					 SP_DP_SYSTEM_CTRL_BASE + 4,
+					 SP_ENHANCED_MODE);
+	if (err)
+		return err;
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+			   SP_DP_MAIN_LINK_BW_SET_REG,
+			   anx78xx->dpcd[DP_MAX_LINK_RATE]);
+	if (err)
+		return err;
+
+	dpcd[1] = drm_dp_max_lane_count(anx78xx->dpcd);
+
+	if (drm_dp_enhanced_frame_cap(anx78xx->dpcd))
+		dpcd[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+	err = drm_dp_dpcd_write(&anx78xx->aux, DP_LINK_BW_SET, dpcd,
+				sizeof(dpcd));
+	if (err < 0) {
+		DRM_ERROR("Failed to configure link: %d\n", err);
+		return err;
+	}
+
+	/* Start training on the source */
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_LT_CTRL_REG,
+			   SP_LT_EN);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_config_dp_output(struct anx78xx *anx78xx)
+{
+	int err;
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+				 SP_VIDEO_MUTE);
+	if (err)
+		return err;
+
+	/* Enable DP output */
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+			       SP_VIDEO_EN);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_send_video_infoframe(struct anx78xx *anx78xx,
+					struct hdmi_avi_infoframe *frame)
+{
+	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
+	int err;
+
+	err = hdmi_avi_infoframe_pack(frame, buffer, sizeof(buffer));
+	if (err < 0) {
+		DRM_ERROR("Failed to pack AVI infoframe: %d\n", err);
+		return err;
+	}
+
+	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+				 SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
+	if (err)
+		return err;
+
+	err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P2],
+				SP_INFOFRAME_AVI_DB1_REG, buffer,
+				frame->length);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_UD);
+	if (err)
+		return err;
+
+	err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+			       SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int anx78xx_get_downstream_info(struct anx78xx *anx78xx)
+{
+	u8 value;
+	int err;
+
+	err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SINK_COUNT, &value);
+	if (err < 0) {
+		DRM_ERROR("Get sink count failed %d\n", err);
+		return err;
+	}
+
+	if (!DP_GET_SINK_COUNT(value)) {
+		DRM_ERROR("Downstream disconnected\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int anx78xx_get_modes(struct drm_connector *connector)
+{
+	struct anx78xx *anx78xx = connector_to_anx78xx(connector);
+	int err, num_modes = 0;
+
+	if (WARN_ON(!anx78xx->powered))
+		return 0;
+
+	if (anx78xx->edid)
+		return drm_add_edid_modes(connector, anx78xx->edid);
+
+	mutex_lock(&anx78xx->lock);
+
+	err = anx78xx_get_downstream_info(anx78xx);
+	if (err) {
+		DRM_ERROR("Failed to get downstream info: %d\n", err);
+		goto unlock;
+	}
+
+	anx78xx->edid = drm_get_edid(connector, &anx78xx->aux.ddc);
+	if (!anx78xx->edid) {
+		DRM_ERROR("Failed to read EDID\n");
+		goto unlock;
+	}
+
+	err = drm_connector_update_edid_property(connector,
+						 anx78xx->edid);
+	if (err) {
+		DRM_ERROR("Failed to update EDID property: %d\n", err);
+		goto unlock;
+	}
+
+	num_modes = drm_add_edid_modes(connector, anx78xx->edid);
+
+unlock:
+	mutex_unlock(&anx78xx->lock);
+
+	return num_modes;
+}
+
+static const struct drm_connector_helper_funcs anx78xx_connector_helper_funcs = {
+	.get_modes = anx78xx_get_modes,
+};
+
+static enum drm_connector_status anx78xx_detect(struct drm_connector *connector,
+						bool force)
+{
+	struct anx78xx *anx78xx = connector_to_anx78xx(connector);
+
+	if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
+		return connector_status_disconnected;
+
+	return connector_status_connected;
+}
+
+static const struct drm_connector_funcs anx78xx_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.detect = anx78xx_detect,
+	.destroy = drm_connector_cleanup,
+	.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 anx78xx_bridge_attach(struct drm_bridge *bridge,
+				 enum drm_bridge_attach_flags flags)
+{
+	struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+	int err;
+
+	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+		DRM_ERROR("Fix bridge driver to make connector optional!");
+		return -EINVAL;
+	}
+
+	if (!bridge->encoder) {
+		DRM_ERROR("Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	/* Register aux channel */
+	anx78xx->aux.name = "DP-AUX";
+	anx78xx->aux.dev = &anx78xx->client->dev;
+	anx78xx->aux.drm_dev = bridge->dev;
+	anx78xx->aux.transfer = anx78xx_aux_transfer;
+
+	err = drm_dp_aux_register(&anx78xx->aux);
+	if (err < 0) {
+		DRM_ERROR("Failed to register aux channel: %d\n", err);
+		return err;
+	}
+
+	err = drm_connector_init(bridge->dev, &anx78xx->connector,
+				 &anx78xx_connector_funcs,
+				 DRM_MODE_CONNECTOR_DisplayPort);
+	if (err) {
+		DRM_ERROR("Failed to initialize connector: %d\n", err);
+		goto aux_unregister;
+	}
+
+	drm_connector_helper_add(&anx78xx->connector,
+				 &anx78xx_connector_helper_funcs);
+
+	anx78xx->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+	err = drm_connector_attach_encoder(&anx78xx->connector,
+					   bridge->encoder);
+	if (err) {
+		DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
+		goto connector_cleanup;
+	}
+
+	err = drm_connector_register(&anx78xx->connector);
+	if (err) {
+		DRM_ERROR("Failed to register connector: %d\n", err);
+		goto connector_cleanup;
+	}
+
+	return 0;
+connector_cleanup:
+	drm_connector_cleanup(&anx78xx->connector);
+aux_unregister:
+	drm_dp_aux_unregister(&anx78xx->aux);
+	return err;
+}
+
+static void anx78xx_bridge_detach(struct drm_bridge *bridge)
+{
+	drm_dp_aux_unregister(&bridge_to_anx78xx(bridge)->aux);
+}
+
+static enum drm_mode_status
+anx78xx_bridge_mode_valid(struct drm_bridge *bridge,
+			  const struct drm_display_info *info,
+			  const struct drm_display_mode *mode)
+{
+	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+		return MODE_NO_INTERLACE;
+
+	/* Max 1200p at 5.4 Ghz, one lane */
+	if (mode->clock > 154000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static void anx78xx_bridge_disable(struct drm_bridge *bridge)
+{
+	struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+
+	/* Power off all modules except configuration registers access */
+	anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+			 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+}
+
+static void anx78xx_bridge_mode_set(struct drm_bridge *bridge,
+				const struct drm_display_mode *mode,
+				const struct drm_display_mode *adjusted_mode)
+{
+	struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+	struct hdmi_avi_infoframe frame;
+	int err;
+
+	if (WARN_ON(!anx78xx->powered))
+		return;
+
+	mutex_lock(&anx78xx->lock);
+
+	err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
+						       &anx78xx->connector,
+						       adjusted_mode);
+	if (err) {
+		DRM_ERROR("Failed to setup AVI infoframe: %d\n", err);
+		goto unlock;
+	}
+
+	err = anx78xx_send_video_infoframe(anx78xx, &frame);
+	if (err)
+		DRM_ERROR("Failed to send AVI infoframe: %d\n", err);
+
+unlock:
+	mutex_unlock(&anx78xx->lock);
+}
+
+static void anx78xx_bridge_enable(struct drm_bridge *bridge)
+{
+	struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+	int err;
+
+	err = anx78xx_start(anx78xx);
+	if (err) {
+		DRM_ERROR("Failed to initialize: %d\n", err);
+		return;
+	}
+
+	err = anx78xx_set_hpd(anx78xx);
+	if (err)
+		DRM_ERROR("Failed to set HPD: %d\n", err);
+}
+
+static const struct drm_bridge_funcs anx78xx_bridge_funcs = {
+	.attach = anx78xx_bridge_attach,
+	.detach = anx78xx_bridge_detach,
+	.mode_valid = anx78xx_bridge_mode_valid,
+	.disable = anx78xx_bridge_disable,
+	.mode_set = anx78xx_bridge_mode_set,
+	.enable = anx78xx_bridge_enable,
+};
+
+static irqreturn_t anx78xx_hpd_threaded_handler(int irq, void *data)
+{
+	struct anx78xx *anx78xx = data;
+	int err;
+
+	if (anx78xx->powered)
+		return IRQ_HANDLED;
+
+	mutex_lock(&anx78xx->lock);
+
+	/* Cable is pulled, power on the chip */
+	anx78xx_poweron(anx78xx);
+
+	err = anx78xx_enable_interrupts(anx78xx);
+	if (err)
+		DRM_ERROR("Failed to enable interrupts: %d\n", err);
+
+	mutex_unlock(&anx78xx->lock);
+
+	return IRQ_HANDLED;
+}
+
+static int anx78xx_handle_dp_int_1(struct anx78xx *anx78xx, u8 irq)
+{
+	int err;
+
+	DRM_DEBUG_KMS("Handle DP interrupt 1: %02x\n", irq);
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
+			   irq);
+	if (err)
+		return err;
+
+	if (irq & SP_TRAINING_FINISH) {
+		DRM_DEBUG_KMS("IRQ: hardware link training finished\n");
+		err = anx78xx_config_dp_output(anx78xx);
+	}
+
+	return err;
+}
+
+static bool anx78xx_handle_common_int_4(struct anx78xx *anx78xx, u8 irq)
+{
+	bool event = false;
+	int err;
+
+	DRM_DEBUG_KMS("Handle common interrupt 4: %02x\n", irq);
+
+	err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
+			   SP_COMMON_INT_STATUS4_REG, irq);
+	if (err) {
+		DRM_ERROR("Failed to write SP_COMMON_INT_STATUS4 %d\n", err);
+		return event;
+	}
+
+	if (irq & SP_HPD_LOST) {
+		DRM_DEBUG_KMS("IRQ: Hot plug detect - cable is pulled out\n");
+		event = true;
+		anx78xx_poweroff(anx78xx);
+		/* Free cached EDID */
+		kfree(anx78xx->edid);
+		anx78xx->edid = NULL;
+	} else if (irq & SP_HPD_PLUG) {
+		DRM_DEBUG_KMS("IRQ: Hot plug detect - cable plug\n");
+		event = true;
+	}
+
+	return event;
+}
+
+static void anx78xx_handle_hdmi_int_1(struct anx78xx *anx78xx, u8 irq)
+{
+	unsigned int value;
+	int err;
+
+	DRM_DEBUG_KMS("Handle HDMI interrupt 1: %02x\n", irq);
+
+	err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
+			   irq);
+	if (err) {
+		DRM_ERROR("Write HDMI int 1 failed: %d\n", err);
+		return;
+	}
+
+	if ((irq & SP_CKDT_CHG) || (irq & SP_SCDT_CHG)) {
+		DRM_DEBUG_KMS("IRQ: HDMI input detected\n");
+
+		err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
+				  SP_SYSTEM_STATUS_REG, &value);
+		if (err) {
+			DRM_ERROR("Read system status reg failed: %d\n", err);
+			return;
+		}
+
+		if (!(value & SP_TMDS_CLOCK_DET)) {
+			DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI clock ***\n");
+			return;
+		}
+
+		if (!(value & SP_TMDS_DE_DET)) {
+			DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI signal ***\n");
+			return;
+		}
+
+		err = anx78xx_dp_link_training(anx78xx);
+		if (err)
+			DRM_ERROR("Failed to start link training: %d\n", err);
+	}
+}
+
+static irqreturn_t anx78xx_intp_threaded_handler(int unused, void *data)
+{
+	struct anx78xx *anx78xx = data;
+	bool event = false;
+	unsigned int irq;
+	int err;
+
+	mutex_lock(&anx78xx->lock);
+
+	err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
+			  &irq);
+	if (err) {
+		DRM_ERROR("Failed to read DP interrupt 1 status: %d\n", err);
+		goto unlock;
+	}
+
+	if (irq)
+		anx78xx_handle_dp_int_1(anx78xx, irq);
+
+	err = regmap_read(anx78xx->map[I2C_IDX_TX_P2],
+			  SP_COMMON_INT_STATUS4_REG, &irq);
+	if (err) {
+		DRM_ERROR("Failed to read common interrupt 4 status: %d\n",
+			  err);
+		goto unlock;
+	}
+
+	if (irq)
+		event = anx78xx_handle_common_int_4(anx78xx, irq);
+
+	/* Make sure we are still powered after handle HPD events */
+	if (!anx78xx->powered)
+		goto unlock;
+
+	err = regmap_read(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
+			  &irq);
+	if (err) {
+		DRM_ERROR("Failed to read HDMI int 1 status: %d\n", err);
+		goto unlock;
+	}
+
+	if (irq)
+		anx78xx_handle_hdmi_int_1(anx78xx, irq);
+
+unlock:
+	mutex_unlock(&anx78xx->lock);
+
+	if (event)
+		drm_helper_hpd_irq_event(anx78xx->connector.dev);
+
+	return IRQ_HANDLED;
+}
+
+static void unregister_i2c_dummy_clients(struct anx78xx *anx78xx)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(anx78xx->i2c_dummy); i++)
+		i2c_unregister_device(anx78xx->i2c_dummy[i]);
+}
+
+static const struct regmap_config anx78xx_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static const u16 anx78xx_chipid_list[] = {
+	0x7808,
+	0x7812,
+	0x7814,
+	0x7818,
+};
+
+static int anx78xx_i2c_probe(struct i2c_client *client)
+{
+	struct anx78xx *anx78xx;
+	struct anx78xx_platform_data *pdata;
+	unsigned int i, idl, idh, version;
+	const u8 *i2c_addresses;
+	bool found = false;
+	int err;
+
+	anx78xx = devm_kzalloc(&client->dev, sizeof(*anx78xx), GFP_KERNEL);
+	if (!anx78xx)
+		return -ENOMEM;
+
+	pdata = &anx78xx->pdata;
+
+	mutex_init(&anx78xx->lock);
+
+#if IS_ENABLED(CONFIG_OF)
+	anx78xx->bridge.of_node = client->dev.of_node;
+#endif
+
+	anx78xx->client = client;
+	i2c_set_clientdata(client, anx78xx);
+
+	err = anx78xx_init_pdata(anx78xx);
+	if (err) {
+		if (err != -EPROBE_DEFER)
+			DRM_ERROR("Failed to initialize pdata: %d\n", err);
+
+		return err;
+	}
+
+	pdata->hpd_irq = gpiod_to_irq(pdata->gpiod_hpd);
+	if (pdata->hpd_irq < 0) {
+		DRM_ERROR("Failed to get HPD IRQ: %d\n", pdata->hpd_irq);
+		return -ENODEV;
+	}
+
+	pdata->intp_irq = client->irq;
+	if (!pdata->intp_irq) {
+		DRM_ERROR("Failed to get CABLE_DET and INTP IRQ\n");
+		return -ENODEV;
+	}
+
+	/* Map slave addresses of ANX7814 */
+	i2c_addresses = device_get_match_data(&client->dev);
+	for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
+		struct i2c_client *i2c_dummy;
+
+		i2c_dummy = i2c_new_dummy_device(client->adapter,
+						 i2c_addresses[i] >> 1);
+		if (IS_ERR(i2c_dummy)) {
+			err = PTR_ERR(i2c_dummy);
+			DRM_ERROR("Failed to reserve I2C bus %02x: %d\n",
+				  i2c_addresses[i], err);
+			goto err_unregister_i2c;
+		}
+
+		anx78xx->i2c_dummy[i] = i2c_dummy;
+		anx78xx->map[i] = devm_regmap_init_i2c(anx78xx->i2c_dummy[i],
+						       &anx78xx_regmap_config);
+		if (IS_ERR(anx78xx->map[i])) {
+			err = PTR_ERR(anx78xx->map[i]);
+			DRM_ERROR("Failed regmap initialization %02x\n",
+				  i2c_addresses[i]);
+			goto err_unregister_i2c;
+		}
+	}
+
+	/* Look for supported chip ID */
+	anx78xx_poweron(anx78xx);
+
+	err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDL_REG,
+			  &idl);
+	if (err)
+		goto err_poweroff;
+
+	err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDH_REG,
+			  &idh);
+	if (err)
+		goto err_poweroff;
+
+	anx78xx->chipid = (u8)idl | ((u8)idh << 8);
+
+	err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_VERSION_REG,
+			  &version);
+	if (err)
+		goto err_poweroff;
+
+	for (i = 0; i < ARRAY_SIZE(anx78xx_chipid_list); i++) {
+		if (anx78xx->chipid == anx78xx_chipid_list[i]) {
+			DRM_INFO("Found ANX%x (ver. %d) SlimPort Transmitter\n",
+				 anx78xx->chipid, version);
+			found = true;
+			break;
+		}
+	}
+
+	if (!found) {
+		DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
+			  anx78xx->chipid, version);
+		err = -ENODEV;
+		goto err_poweroff;
+	}
+
+	err = devm_request_threaded_irq(&client->dev, pdata->hpd_irq, NULL,
+					anx78xx_hpd_threaded_handler,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"anx78xx-hpd", anx78xx);
+	if (err) {
+		DRM_ERROR("Failed to request CABLE_DET threaded IRQ: %d\n",
+			  err);
+		goto err_poweroff;
+	}
+
+	err = devm_request_threaded_irq(&client->dev, pdata->intp_irq, NULL,
+					anx78xx_intp_threaded_handler,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"anx78xx-intp", anx78xx);
+	if (err) {
+		DRM_ERROR("Failed to request INTP threaded IRQ: %d\n", err);
+		goto err_poweroff;
+	}
+
+	anx78xx->bridge.funcs = &anx78xx_bridge_funcs;
+
+	drm_bridge_add(&anx78xx->bridge);
+
+	/* If cable is pulled out, just poweroff and wait for HPD event */
+	if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
+		anx78xx_poweroff(anx78xx);
+
+	return 0;
+
+err_poweroff:
+	anx78xx_poweroff(anx78xx);
+
+err_unregister_i2c:
+	unregister_i2c_dummy_clients(anx78xx);
+	return err;
+}
+
+static void anx78xx_i2c_remove(struct i2c_client *client)
+{
+	struct anx78xx *anx78xx = i2c_get_clientdata(client);
+
+	drm_bridge_remove(&anx78xx->bridge);
+
+	unregister_i2c_dummy_clients(anx78xx);
+
+	kfree(anx78xx->edid);
+}
+
+static const struct i2c_device_id anx78xx_id[] = {
+	{ "anx7814", 0 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, anx78xx_id);
+
+static const struct of_device_id anx78xx_match_table[] = {
+	{ .compatible = "analogix,anx7808", .data = anx7808_i2c_addresses },
+	{ .compatible = "analogix,anx7812", .data = anx781x_i2c_addresses },
+	{ .compatible = "analogix,anx7814", .data = anx781x_i2c_addresses },
+	{ .compatible = "analogix,anx7818", .data = anx781x_i2c_addresses },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, anx78xx_match_table);
+
+static struct i2c_driver anx78xx_driver = {
+	.driver = {
+		   .name = "anx7814",
+		   .of_match_table = anx78xx_match_table,
+		  },
+	.probe = anx78xx_i2c_probe,
+	.remove = anx78xx_i2c_remove,
+	.id_table = anx78xx_id,
+};
+module_i2c_driver(anx78xx_driver);
+
+MODULE_DESCRIPTION("ANX78xx SlimPort Transmitter driver");
+MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h
new file mode 100644
index 000000000..db2a2725a
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h
@@ -0,0 +1,249 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
+ */
+
+#ifndef __ANX78xx_H
+#define __ANX78xx_H
+
+#include "analogix-i2c-dptx.h"
+#include "analogix-i2c-txcommon.h"
+
+/***************************************************************/
+/* Register definitions for RX_PO                              */
+/***************************************************************/
+
+/*
+ * System Control and Status
+ */
+
+/* Software Reset Register 1 */
+#define SP_SOFTWARE_RESET1_REG		0x11
+#define SP_VIDEO_RST			BIT(4)
+#define SP_HDCP_MAN_RST			BIT(2)
+#define SP_TMDS_RST			BIT(1)
+#define SP_SW_MAN_RST			BIT(0)
+
+/* System Status Register */
+#define SP_SYSTEM_STATUS_REG		0x14
+#define SP_TMDS_CLOCK_DET		BIT(1)
+#define SP_TMDS_DE_DET			BIT(0)
+
+/* HDMI Status Register */
+#define SP_HDMI_STATUS_REG		0x15
+#define SP_HDMI_AUD_LAYOUT		BIT(3)
+#define SP_HDMI_DET			BIT(0)
+#  define SP_DVI_MODE			0
+#  define SP_HDMI_MODE			1
+
+/* HDMI Mute Control Register */
+#define SP_HDMI_MUTE_CTRL_REG		0x16
+#define SP_AUD_MUTE			BIT(1)
+#define SP_VID_MUTE			BIT(0)
+
+/* System Power Down Register 1 */
+#define SP_SYSTEM_POWER_DOWN1_REG	0x18
+#define SP_PWDN_CTRL			BIT(0)
+
+/*
+ * Audio and Video Auto Control
+ */
+
+/* Auto Audio and Video Control register */
+#define SP_AUDVID_CTRL_REG		0x20
+#define SP_AVC_OE			BIT(7)
+#define SP_AAC_OE			BIT(6)
+#define SP_AVC_EN			BIT(1)
+#define SP_AAC_EN			BIT(0)
+
+/* Audio Exception Enable Registers */
+#define SP_AUD_EXCEPTION_ENABLE_BASE	(0x24 - 1)
+/* Bits for Audio Exception Enable Register 3 */
+#define SP_AEC_EN21			BIT(5)
+
+/*
+ * Interrupt
+ */
+
+/* Interrupt Status Register 1 */
+#define SP_INT_STATUS1_REG		0x31
+/* Bits for Interrupt Status Register 1 */
+#define SP_HDMI_DVI			BIT(7)
+#define SP_CKDT_CHG			BIT(6)
+#define SP_SCDT_CHG			BIT(5)
+#define SP_PCLK_CHG			BIT(4)
+#define SP_PLL_UNLOCK			BIT(3)
+#define SP_CABLE_PLUG_CHG		BIT(2)
+#define SP_SET_MUTE			BIT(1)
+#define SP_SW_INTR			BIT(0)
+/* Bits for Interrupt Status Register 2 */
+#define SP_HDCP_ERR			BIT(5)
+#define SP_AUDIO_SAMPLE_CHG		BIT(0)	/* undocumented */
+/* Bits for Interrupt Status Register 3 */
+#define SP_AUD_MODE_CHG			BIT(0)
+/* Bits for Interrupt Status Register 5 */
+#define SP_AUDIO_RCV			BIT(0)
+/* Bits for Interrupt Status Register 6 */
+#define SP_INT_STATUS6_REG		0x36
+#define SP_CTS_RCV			BIT(7)
+#define SP_NEW_AUD_PKT			BIT(4)
+#define SP_NEW_AVI_PKT			BIT(1)
+#define SP_NEW_CP_PKT			BIT(0)
+/* Bits for Interrupt Status Register 7 */
+#define SP_NO_VSI			BIT(7)
+#define SP_NEW_VS			BIT(4)
+
+/* Interrupt Mask 1 Status Registers */
+#define SP_INT_MASK1_REG		0x41
+
+/* HDMI US TIMER Control Register */
+#define SP_HDMI_US_TIMER_CTRL_REG	0x49
+#define SP_MS_TIMER_MARGIN_10_8_MASK	0x07
+
+/*
+ * TMDS Control
+ */
+
+/* TMDS Control Registers */
+#define SP_TMDS_CTRL_BASE		(0x50 - 1)
+/* Bits for TMDS Control Register 7 */
+#define SP_PD_RT			BIT(0)
+
+/*
+ * Video Control
+ */
+
+/* Video Status Register */
+#define SP_VIDEO_STATUS_REG		0x70
+#define SP_COLOR_DEPTH_MASK		0xf0
+#define SP_COLOR_DEPTH_SHIFT		4
+#  define SP_COLOR_DEPTH_MODE_LEGACY	0x00
+#  define SP_COLOR_DEPTH_MODE_24BIT	0x04
+#  define SP_COLOR_DEPTH_MODE_30BIT	0x05
+#  define SP_COLOR_DEPTH_MODE_36BIT	0x06
+#  define SP_COLOR_DEPTH_MODE_48BIT	0x07
+
+/* Video Data Range Control Register */
+#define SP_VID_DATA_RANGE_CTRL_REG	0x83
+#define SP_R2Y_INPUT_LIMIT		BIT(1)
+
+/* Pixel Clock High Resolution Counter Registers */
+#define SP_PCLK_HIGHRES_CNT_BASE	(0x8c - 1)
+
+/*
+ * Audio Control
+ */
+
+/* Number of Audio Channels Status Registers */
+#define SP_AUD_CH_STATUS_REG_NUM	6
+
+/* Audio IN S/PDIF Channel Status Registers */
+#define SP_AUD_SPDIF_CH_STATUS_BASE	0xc7
+
+/* Audio IN S/PDIF Channel Status Register 4 */
+#define SP_FS_FREQ_MASK			0x0f
+#  define SP_FS_FREQ_44100HZ		0x00
+#  define SP_FS_FREQ_48000HZ		0x02
+#  define SP_FS_FREQ_32000HZ		0x03
+#  define SP_FS_FREQ_88200HZ		0x08
+#  define SP_FS_FREQ_96000HZ		0x0a
+#  define SP_FS_FREQ_176400HZ		0x0c
+#  define SP_FS_FREQ_192000HZ		0x0e
+
+/*
+ * Micellaneous Control Block
+ */
+
+/* CHIP Control Register */
+#define SP_CHIP_CTRL_REG		0xe3
+#define SP_MAN_HDMI5V_DET		BIT(3)
+#define SP_PLLLOCK_CKDT_EN		BIT(2)
+#define SP_ANALOG_CKDT_EN		BIT(1)
+#define SP_DIGITAL_CKDT_EN		BIT(0)
+
+/* Packet Receiving Status Register */
+#define SP_PACKET_RECEIVING_STATUS_REG	0xf3
+#define SP_AVI_RCVD			BIT(5)
+#define SP_VSI_RCVD			BIT(1)
+
+/***************************************************************/
+/* Register definitions for RX_P1                              */
+/***************************************************************/
+
+/* HDCP BCAPS Shadow Register */
+#define SP_HDCP_BCAPS_SHADOW_REG	0x2a
+#define SP_BCAPS_REPEATER		BIT(5)
+
+/* HDCP Status Register */
+#define SP_RX_HDCP_STATUS_REG		0x3f
+#define SP_AUTH_EN			BIT(4)
+
+/*
+ * InfoFrame and Control Packet Registers
+ */
+
+/* AVI InfoFrame packet checksum */
+#define SP_AVI_INFOFRAME_CHECKSUM	0xa3
+
+/* AVI InfoFrame Registers */
+#define SP_AVI_INFOFRAME_DATA_BASE	0xa4
+
+#define SP_AVI_COLOR_F_MASK		0x60
+#define SP_AVI_COLOR_F_SHIFT		5
+
+/* Audio InfoFrame Registers */
+#define SP_AUD_INFOFRAME_DATA_BASE	0xc4
+#define SP_AUD_INFOFRAME_LAYOUT_MASK	0x0f
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet type code */
+#define SP_MPEG_VS_INFOFRAME_TYPE_REG	0xe0
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet length */
+#define SP_MPEG_VS_INFOFRAME_LEN_REG	0xe2
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet version number */
+#define SP_MPEG_VS_INFOFRAME_VER_REG	0xe1
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet content */
+#define SP_MPEG_VS_INFOFRAME_DATA_BASE	0xe4
+
+/* General Control Packet Register */
+#define SP_GENERAL_CTRL_PACKET_REG	0x9f
+#define SP_CLEAR_AVMUTE			BIT(4)
+#define SP_SET_AVMUTE			BIT(0)
+
+/***************************************************************/
+/* Register definitions for TX_P1                              */
+/***************************************************************/
+
+/* DP TX Link Training Control Register */
+#define SP_DP_TX_LT_CTRL0_REG		0x30
+
+/* PD 1.2 Lint Training 80bit Pattern Register */
+#define SP_DP_LT_80BIT_PATTERN0_REG	0x80
+#define SP_DP_LT_80BIT_PATTERN_REG_NUM	10
+
+/* Audio Interface Control Register 0 */
+#define SP_AUD_INTERFACE_CTRL0_REG	0x5f
+#define SP_AUD_INTERFACE_DISABLE	0x80
+
+/* Audio Interface Control Register 2 */
+#define SP_AUD_INTERFACE_CTRL2_REG	0x60
+#define SP_M_AUD_ADJUST_ST		0x04
+
+/* Audio Interface Control Register 3 */
+#define SP_AUD_INTERFACE_CTRL3_REG	0x62
+
+/* Audio Interface Control Register 4 */
+#define SP_AUD_INTERFACE_CTRL4_REG	0x67
+
+/* Audio Interface Control Register 5 */
+#define SP_AUD_INTERFACE_CTRL5_REG	0x68
+
+/* Audio Interface Control Register 6 */
+#define SP_AUD_INTERFACE_CTRL6_REG	0x69
+
+/* Firmware Version Register */
+#define SP_FW_VER_REG			0xb7
+
+#endif
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
new file mode 100644
index 000000000..b1e482994
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/regmap.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm.h>
+#include <drm/drm_print.h>
+
+#include "analogix-i2c-dptx.h"
+
+#define AUX_WAIT_TIMEOUT_MS	15
+#define AUX_CH_BUFFER_SIZE	16
+
+static int anx_i2c_dp_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+	return regmap_update_bits(map, reg, mask, 0);
+}
+
+static bool anx_dp_aux_op_finished(struct regmap *map_dptx)
+{
+	unsigned int value;
+	int err;
+
+	err = regmap_read(map_dptx, SP_DP_AUX_CH_CTRL2_REG, &value);
+	if (err < 0)
+		return false;
+
+	return (value & SP_AUX_EN) == 0;
+}
+
+static int anx_dp_aux_wait(struct regmap *map_dptx)
+{
+	unsigned long timeout;
+	unsigned int status;
+	int err;
+
+	timeout = jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1;
+
+	while (!anx_dp_aux_op_finished(map_dptx)) {
+		if (time_after(jiffies, timeout)) {
+			if (!anx_dp_aux_op_finished(map_dptx)) {
+				DRM_ERROR("Timed out waiting AUX to finish\n");
+				return -ETIMEDOUT;
+			}
+
+			break;
+		}
+
+		usleep_range(1000, 2000);
+	}
+
+	/* Read the AUX channel access status */
+	err = regmap_read(map_dptx, SP_AUX_CH_STATUS_REG, &status);
+	if (err < 0) {
+		DRM_ERROR("Failed to read from AUX channel: %d\n", err);
+		return err;
+	}
+
+	if (status & SP_AUX_STATUS) {
+		DRM_ERROR("Failed to wait for AUX channel (status: %02x)\n",
+			  status);
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int anx_dp_aux_address(struct regmap *map_dptx, unsigned int addr)
+{
+	int err;
+
+	err = regmap_write(map_dptx, SP_AUX_ADDR_7_0_REG, addr & 0xff);
+	if (err)
+		return err;
+
+	err = regmap_write(map_dptx, SP_AUX_ADDR_15_8_REG,
+			   (addr & 0xff00) >> 8);
+	if (err)
+		return err;
+
+	/*
+	 * DP AUX CH Address Register #2, only update bits[3:0]
+	 * [7:4] RESERVED
+	 * [3:0] AUX_ADDR[19:16], Register control AUX CH address.
+	 */
+	err = regmap_update_bits(map_dptx, SP_AUX_ADDR_19_16_REG,
+				 SP_AUX_ADDR_19_16_MASK,
+				 (addr & 0xf0000) >> 16);
+
+	if (err)
+		return err;
+
+	return 0;
+}
+
+ssize_t anx_dp_aux_transfer(struct regmap *map_dptx,
+				struct drm_dp_aux_msg *msg)
+{
+	u8 ctrl1 = msg->request;
+	u8 ctrl2 = SP_AUX_EN;
+	u8 *buffer = msg->buffer;
+	int err;
+
+	/* The DP AUX transmit and receive buffer has 16 bytes. */
+	if (WARN_ON(msg->size > AUX_CH_BUFFER_SIZE))
+		return -E2BIG;
+
+	/* Zero-sized messages specify address-only transactions. */
+	if (msg->size < 1)
+		ctrl2 |= SP_ADDR_ONLY;
+	else	/* For non-zero-sized set the length field. */
+		ctrl1 |= (msg->size - 1) << SP_AUX_LENGTH_SHIFT;
+
+	if ((msg->size > 0) && ((msg->request & DP_AUX_I2C_READ) == 0)) {
+		/* When WRITE | MOT write values to data buffer */
+		err = regmap_bulk_write(map_dptx,
+					SP_DP_BUF_DATA0_REG, buffer,
+					msg->size);
+		if (err)
+			return err;
+	}
+
+	/* Write address and request */
+	err = anx_dp_aux_address(map_dptx, msg->address);
+	if (err)
+		return err;
+
+	err = regmap_write(map_dptx, SP_DP_AUX_CH_CTRL1_REG, ctrl1);
+	if (err)
+		return err;
+
+	/* Start transaction */
+	err = regmap_update_bits(map_dptx, SP_DP_AUX_CH_CTRL2_REG,
+				 SP_ADDR_ONLY | SP_AUX_EN, ctrl2);
+	if (err)
+		return err;
+
+	err = anx_dp_aux_wait(map_dptx);
+	if (err)
+		return err;
+
+	msg->reply = DP_AUX_I2C_REPLY_ACK;
+
+	if ((msg->size > 0) && (msg->request & DP_AUX_I2C_READ)) {
+		/* Read values from data buffer */
+		err = regmap_bulk_read(map_dptx,
+				       SP_DP_BUF_DATA0_REG, buffer,
+				       msg->size);
+		if (err)
+			return err;
+	}
+
+	err = anx_i2c_dp_clear_bits(map_dptx, SP_DP_AUX_CH_CTRL2_REG,
+				    SP_ADDR_ONLY);
+	if (err)
+		return err;
+
+	return msg->size;
+}
+EXPORT_SYMBOL_GPL(anx_dp_aux_transfer);
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
new file mode 100644
index 000000000..663c4bea6
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
@@ -0,0 +1,256 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#ifndef _ANALOGIX_I2C_DPTX_H_
+#define _ANALOGIX_I2C_DPTX_H_
+
+/***************************************************************/
+/* Register definitions for TX_P0                              */
+/***************************************************************/
+
+/* HDCP Status Register */
+#define SP_TX_HDCP_STATUS_REG		0x00
+#define SP_AUTH_FAIL			BIT(5)
+#define SP_AUTHEN_PASS			BIT(1)
+
+/* HDCP Control Register 0 */
+#define SP_HDCP_CTRL0_REG		0x01
+#define SP_RX_REPEATER			BIT(6)
+#define SP_RE_AUTH			BIT(5)
+#define SP_SW_AUTH_OK			BIT(4)
+#define SP_HARD_AUTH_EN			BIT(3)
+#define SP_HDCP_ENC_EN			BIT(2)
+#define SP_BKSV_SRM_PASS		BIT(1)
+#define SP_KSVLIST_VLD			BIT(0)
+/* HDCP Function Enabled */
+#define SP_HDCP_FUNCTION_ENABLED	(BIT(0) | BIT(1) | BIT(2) | BIT(3))
+
+/* HDCP Receiver BSTATUS Register 0 */
+#define	SP_HDCP_RX_BSTATUS0_REG		0x1b
+/* HDCP Receiver BSTATUS Register 1 */
+#define	SP_HDCP_RX_BSTATUS1_REG		0x1c
+
+/* HDCP Embedded "Blue Screen" Content Registers */
+#define SP_HDCP_VID0_BLUE_SCREEN_REG	0x2c
+#define SP_HDCP_VID1_BLUE_SCREEN_REG	0x2d
+#define SP_HDCP_VID2_BLUE_SCREEN_REG	0x2e
+
+/* HDCP Wait R0 Timing Register */
+#define SP_HDCP_WAIT_R0_TIME_REG	0x40
+
+/* HDCP Link Integrity Check Timer Register */
+#define SP_HDCP_LINK_CHECK_TIMER_REG	0x41
+
+/* HDCP Repeater Ready Wait Timer Register */
+#define SP_HDCP_RPTR_RDY_WAIT_TIME_REG	0x42
+
+/* HDCP Auto Timer Register */
+#define SP_HDCP_AUTO_TIMER_REG		0x51
+
+/* HDCP Key Status Register */
+#define SP_HDCP_KEY_STATUS_REG		0x5e
+
+/* HDCP Key Command Register */
+#define SP_HDCP_KEY_COMMAND_REG		0x5f
+#define SP_DISABLE_SYNC_HDCP		BIT(2)
+
+/* OTP Memory Key Protection Registers */
+#define SP_OTP_KEY_PROTECT1_REG		0x60
+#define SP_OTP_KEY_PROTECT2_REG		0x61
+#define SP_OTP_KEY_PROTECT3_REG		0x62
+#define SP_OTP_PSW1			0xa2
+#define SP_OTP_PSW2			0x7e
+#define SP_OTP_PSW3			0xc6
+
+/* DP System Control Registers */
+#define SP_DP_SYSTEM_CTRL_BASE		(0x80 - 1)
+/* Bits for DP System Control Register 2 */
+#define SP_CHA_STA			BIT(2)
+/* Bits for DP System Control Register 3 */
+#define SP_HPD_STATUS			BIT(6)
+#define SP_HPD_FORCE			BIT(5)
+#define SP_HPD_CTRL			BIT(4)
+#define SP_STRM_VALID			BIT(2)
+#define SP_STRM_FORCE			BIT(1)
+#define SP_STRM_CTRL			BIT(0)
+/* Bits for DP System Control Register 4 */
+#define SP_ENHANCED_MODE		BIT(3)
+
+/* DP Video Control Register */
+#define SP_DP_VIDEO_CTRL_REG		0x84
+#define SP_COLOR_F_MASK			0x06
+#define SP_COLOR_F_SHIFT		1
+#define SP_BPC_MASK			0xe0
+#define SP_BPC_SHIFT			5
+#  define SP_BPC_6BITS			0x00
+#  define SP_BPC_8BITS			0x01
+#  define SP_BPC_10BITS			0x02
+#  define SP_BPC_12BITS			0x03
+
+/* DP Audio Control Register */
+#define SP_DP_AUDIO_CTRL_REG		0x87
+#define SP_AUD_EN			BIT(0)
+
+/* 10us Pulse Generate Timer Registers */
+#define SP_I2C_GEN_10US_TIMER0_REG	0x88
+#define SP_I2C_GEN_10US_TIMER1_REG	0x89
+
+/* Packet Send Control Register */
+#define SP_PACKET_SEND_CTRL_REG		0x90
+#define SP_AUD_IF_UP			BIT(7)
+#define SP_AVI_IF_UD			BIT(6)
+#define SP_MPEG_IF_UD			BIT(5)
+#define SP_SPD_IF_UD			BIT(4)
+#define SP_AUD_IF_EN			BIT(3)
+#define SP_AVI_IF_EN			BIT(2)
+#define SP_MPEG_IF_EN			BIT(1)
+#define SP_SPD_IF_EN			BIT(0)
+
+/* DP HDCP Control Register */
+#define SP_DP_HDCP_CTRL_REG		0x92
+#define SP_AUTO_EN			BIT(7)
+#define SP_AUTO_START			BIT(5)
+#define SP_LINK_POLLING			BIT(1)
+
+/* DP Main Link Bandwidth Setting Register */
+#define SP_DP_MAIN_LINK_BW_SET_REG	0xa0
+#define SP_LINK_BW_SET_MASK		0x1f
+#define SP_INITIAL_SLIM_M_AUD_SEL	BIT(5)
+
+/* DP Lane Count Setting Register */
+#define SP_DP_LANE_COUNT_SET_REG	0xa1
+
+/* DP Training Pattern Set Register */
+#define SP_DP_TRAINING_PATTERN_SET_REG	0xa2
+
+/* DP Lane 0 Link Training Control Register */
+#define SP_DP_LANE0_LT_CTRL_REG		0xa3
+#define SP_TX_SW_SET_MASK		0x1b
+#define SP_MAX_PRE_REACH		BIT(5)
+#define SP_MAX_DRIVE_REACH		BIT(4)
+#define SP_PRE_EMP_LEVEL1		BIT(3)
+#define SP_DRVIE_CURRENT_LEVEL1		BIT(0)
+
+/* DP Link Training Control Register */
+#define SP_DP_LT_CTRL_REG		0xa8
+#define SP_DP_LT_INPROGRESS		0x80
+#define SP_LT_ERROR_TYPE_MASK		0x70
+#  define SP_LT_NO_ERROR		0x00
+#  define SP_LT_AUX_WRITE_ERROR		0x01
+#  define SP_LT_MAX_DRIVE_REACHED	0x02
+#  define SP_LT_WRONG_LANE_COUNT_SET	0x03
+#  define SP_LT_LOOP_SAME_5_TIME	0x04
+#  define SP_LT_CR_FAIL_IN_EQ		0x05
+#  define SP_LT_EQ_LOOP_5_TIME		0x06
+#define SP_LT_EN			BIT(0)
+
+/* DP CEP Training Control Registers */
+#define SP_DP_CEP_TRAINING_CTRL0_REG	0xa9
+#define SP_DP_CEP_TRAINING_CTRL1_REG	0xaa
+
+/* DP Debug Register 1 */
+#define SP_DP_DEBUG1_REG		0xb0
+#define SP_DEBUG_PLL_LOCK		BIT(4)
+#define SP_POLLING_EN			BIT(1)
+
+/* DP Polling Control Register */
+#define SP_DP_POLLING_CTRL_REG		0xb4
+#define SP_AUTO_POLLING_DISABLE		BIT(0)
+
+/* DP Link Debug Control Register */
+#define SP_DP_LINK_DEBUG_CTRL_REG	0xb8
+#define SP_M_VID_DEBUG			BIT(5)
+#define SP_NEW_PRBS7			BIT(4)
+#define SP_INSERT_ER			BIT(1)
+#define SP_PRBS31_EN			BIT(0)
+
+/* AUX Misc control Register */
+#define SP_AUX_MISC_CTRL_REG		0xbf
+
+/* DP PLL control Register */
+#define SP_DP_PLL_CTRL_REG		0xc7
+#define SP_PLL_RST			BIT(6)
+
+/* DP Analog Power Down Register */
+#define SP_DP_ANALOG_POWER_DOWN_REG	0xc8
+#define SP_CH0_PD			BIT(0)
+
+/* DP Misc Control Register */
+#define SP_DP_MISC_CTRL_REG		0xcd
+#define SP_EQ_TRAINING_LOOP		BIT(6)
+
+/* DP Extra I2C Device Address Register */
+#define SP_DP_EXTRA_I2C_DEV_ADDR_REG	0xce
+#define SP_I2C_STRETCH_DISABLE		BIT(7)
+
+#define SP_I2C_EXTRA_ADDR		0x50
+
+/* DP Downspread Control Register 1 */
+#define SP_DP_DOWNSPREAD_CTRL1_REG	0xd0
+
+/* DP M Value Calculation Control Register */
+#define SP_DP_M_CALCULATION_CTRL_REG	0xd9
+#define SP_M_GEN_CLK_SEL		BIT(0)
+
+/* AUX Channel Access Status Register */
+#define SP_AUX_CH_STATUS_REG		0xe0
+#define SP_AUX_STATUS			0x0f
+
+/* AUX Channel DEFER Control Register */
+#define SP_AUX_DEFER_CTRL_REG		0xe2
+#define SP_DEFER_CTRL_EN		BIT(7)
+
+/* DP Buffer Data Count Register */
+#define SP_BUF_DATA_COUNT_REG		0xe4
+#define SP_BUF_DATA_COUNT_MASK		0x1f
+#define SP_BUF_CLR			BIT(7)
+
+/* DP AUX Channel Control Register 1 */
+#define SP_DP_AUX_CH_CTRL1_REG		0xe5
+#define SP_AUX_TX_COMM_MASK		0x0f
+#define SP_AUX_LENGTH_MASK		0xf0
+#define SP_AUX_LENGTH_SHIFT		4
+
+/* DP AUX CH Address Register 0 */
+#define SP_AUX_ADDR_7_0_REG		0xe6
+
+/* DP AUX CH Address Register 1 */
+#define SP_AUX_ADDR_15_8_REG		0xe7
+
+/* DP AUX CH Address Register 2 */
+#define SP_AUX_ADDR_19_16_REG		0xe8
+#define SP_AUX_ADDR_19_16_MASK		0x0f
+
+/* DP AUX Channel Control Register 2 */
+#define SP_DP_AUX_CH_CTRL2_REG		0xe9
+#define SP_AUX_SEL_RXCM			BIT(6)
+#define SP_AUX_CHSEL			BIT(3)
+#define SP_AUX_PN_INV			BIT(2)
+#define SP_ADDR_ONLY			BIT(1)
+#define SP_AUX_EN			BIT(0)
+
+/* DP Video Stream Control InfoFrame Register */
+#define SP_DP_3D_VSC_CTRL_REG		0xea
+#define SP_INFO_FRAME_VSC_EN		BIT(0)
+
+/* DP Video Stream Data Byte 1 Register */
+#define SP_DP_VSC_DB1_REG		0xeb
+
+/* DP AUX Channel Control Register 3 */
+#define SP_DP_AUX_CH_CTRL3_REG		0xec
+#define SP_WAIT_COUNTER_7_0_MASK	0xff
+
+/* DP AUX Channel Control Register 4 */
+#define SP_DP_AUX_CH_CTRL4_REG		0xed
+
+/* DP AUX Buffer Data Registers */
+#define SP_DP_BUF_DATA0_REG		0xf0
+
+ssize_t anx_dp_aux_transfer(struct regmap *map_dptx,
+				struct drm_dp_aux_msg *msg);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
new file mode 100644
index 000000000..3c843497d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
@@ -0,0 +1,234 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
+ */
+#ifndef _ANALOGIX_I2C_TXCOMMON_H_
+#define _ANALOGIX_I2C_TXCOMMON_H_
+
+/***************************************************************/
+/* Register definitions for TX_P2                              */
+/***************************************************************/
+
+/*
+ * Core Register Definitions
+ */
+
+/* Device ID Low Byte Register */
+#define SP_DEVICE_IDL_REG		0x02
+
+/* Device ID High Byte Register */
+#define SP_DEVICE_IDH_REG		0x03
+
+/* Device version register */
+#define SP_DEVICE_VERSION_REG		0x04
+
+/* Power Down Control Register */
+#define SP_POWERDOWN_CTRL_REG		0x05
+#define SP_REGISTER_PD			BIT(7)
+#define SP_HDCP_PD			BIT(5)
+#define SP_AUDIO_PD			BIT(4)
+#define SP_VIDEO_PD			BIT(3)
+#define SP_LINK_PD			BIT(2)
+#define SP_TOTAL_PD			BIT(1)
+
+/* Reset Control Register 1 */
+#define SP_RESET_CTRL1_REG		0x06
+#define SP_MISC_RST			BIT(7)
+#define SP_VIDCAP_RST			BIT(6)
+#define SP_VIDFIF_RST			BIT(5)
+#define SP_AUDFIF_RST			BIT(4)
+#define SP_AUDCAP_RST			BIT(3)
+#define SP_HDCP_RST			BIT(2)
+#define SP_SW_RST			BIT(1)
+#define SP_HW_RST			BIT(0)
+
+/* Reset Control Register 2 */
+#define SP_RESET_CTRL2_REG		0x07
+#define SP_AUX_RST			BIT(2)
+#define SP_SERDES_FIFO_RST		BIT(1)
+#define SP_I2C_REG_RST			BIT(0)
+
+/* Video Control Register 1 */
+#define SP_VID_CTRL1_REG		0x08
+#define SP_VIDEO_EN			BIT(7)
+#define SP_VIDEO_MUTE			BIT(2)
+#define SP_DE_GEN			BIT(1)
+#define SP_DEMUX			BIT(0)
+
+/* Video Control Register 2 */
+#define SP_VID_CTRL2_REG		0x09
+#define SP_IN_COLOR_F_MASK		0x03
+#define SP_IN_YC_BIT_SEL		BIT(2)
+#define SP_IN_BPC_MASK			0x70
+#define SP_IN_BPC_SHIFT			4
+#  define SP_IN_BPC_12BIT		0x03
+#  define SP_IN_BPC_10BIT		0x02
+#  define SP_IN_BPC_8BIT		0x01
+#  define SP_IN_BPC_6BIT		0x00
+#define SP_IN_D_RANGE			BIT(7)
+
+/* Video Control Register 3 */
+#define SP_VID_CTRL3_REG		0x0a
+#define SP_HPD_OUT			BIT(6)
+
+/* Video Control Register 5 */
+#define SP_VID_CTRL5_REG		0x0c
+#define SP_CSC_STD_SEL			BIT(7)
+#define SP_XVYCC_RNG_LMT		BIT(6)
+#define SP_RANGE_Y2R			BIT(5)
+#define SP_CSPACE_Y2R			BIT(4)
+#define SP_RGB_RNG_LMT			BIT(3)
+#define SP_Y_RNG_LMT			BIT(2)
+#define SP_RANGE_R2Y			BIT(1)
+#define SP_CSPACE_R2Y			BIT(0)
+
+/* Video Control Register 6 */
+#define SP_VID_CTRL6_REG		0x0d
+#define SP_TEST_PATTERN_EN		BIT(7)
+#define SP_VIDEO_PROCESS_EN		BIT(6)
+#define SP_VID_US_MODE			BIT(3)
+#define SP_VID_DS_MODE			BIT(2)
+#define SP_UP_SAMPLE			BIT(1)
+#define SP_DOWN_SAMPLE			BIT(0)
+
+/* Video Control Register 8 */
+#define SP_VID_CTRL8_REG		0x0f
+#define SP_VID_VRES_TH			BIT(0)
+
+/* Total Line Status Low Byte Register */
+#define SP_TOTAL_LINE_STAL_REG		0x24
+
+/* Total Line Status High Byte Register */
+#define SP_TOTAL_LINE_STAH_REG		0x25
+
+/* Active Line Status Low Byte Register */
+#define SP_ACT_LINE_STAL_REG		0x26
+
+/* Active Line Status High Byte Register */
+#define SP_ACT_LINE_STAH_REG		0x27
+
+/* Vertical Front Porch Status Register */
+#define SP_V_F_PORCH_STA_REG		0x28
+
+/* Vertical SYNC Width Status Register */
+#define SP_V_SYNC_STA_REG		0x29
+
+/* Vertical Back Porch Status Register */
+#define SP_V_B_PORCH_STA_REG		0x2a
+
+/* Total Pixel Status Low Byte Register */
+#define SP_TOTAL_PIXEL_STAL_REG		0x2b
+
+/* Total Pixel Status High Byte Register */
+#define SP_TOTAL_PIXEL_STAH_REG		0x2c
+
+/* Active Pixel Status Low Byte Register */
+#define SP_ACT_PIXEL_STAL_REG		0x2d
+
+/* Active Pixel Status High Byte Register */
+#define SP_ACT_PIXEL_STAH_REG		0x2e
+
+/* Horizontal Front Porch Status Low Byte Register */
+#define SP_H_F_PORCH_STAL_REG		0x2f
+
+/* Horizontal Front Porch Statys High Byte Register */
+#define SP_H_F_PORCH_STAH_REG		0x30
+
+/* Horizontal SYNC Width Status Low Byte Register */
+#define SP_H_SYNC_STAL_REG		0x31
+
+/* Horizontal SYNC Width Status High Byte Register */
+#define SP_H_SYNC_STAH_REG		0x32
+
+/* Horizontal Back Porch Status Low Byte Register */
+#define SP_H_B_PORCH_STAL_REG		0x33
+
+/* Horizontal Back Porch Status High Byte Register */
+#define SP_H_B_PORCH_STAH_REG		0x34
+
+/* InfoFrame AVI Packet DB1 Register */
+#define SP_INFOFRAME_AVI_DB1_REG	0x70
+
+/* Bit Control Specific Register */
+#define SP_BIT_CTRL_SPECIFIC_REG	0x80
+#define SP_BIT_CTRL_SELECT_SHIFT	1
+#define SP_ENABLE_BIT_CTRL		BIT(0)
+
+/* InfoFrame Audio Packet DB1 Register */
+#define SP_INFOFRAME_AUD_DB1_REG	0x83
+
+/* InfoFrame MPEG Packet DB1 Register */
+#define SP_INFOFRAME_MPEG_DB1_REG	0xb0
+
+/* Audio Channel Status Registers */
+#define SP_AUD_CH_STATUS_BASE		0xd0
+
+/* Audio Channel Num Register 5 */
+#define SP_I2S_CHANNEL_NUM_MASK		0xe0
+#  define SP_I2S_CH_NUM_1		(0x00 << 5)
+#  define SP_I2S_CH_NUM_2		(0x01 << 5)
+#  define SP_I2S_CH_NUM_3		(0x02 << 5)
+#  define SP_I2S_CH_NUM_4		(0x03 << 5)
+#  define SP_I2S_CH_NUM_5		(0x04 << 5)
+#  define SP_I2S_CH_NUM_6		(0x05 << 5)
+#  define SP_I2S_CH_NUM_7		(0x06 << 5)
+#  define SP_I2S_CH_NUM_8		(0x07 << 5)
+#define SP_EXT_VUCP			BIT(2)
+#define SP_VBIT				BIT(1)
+#define SP_AUDIO_LAYOUT			BIT(0)
+
+/* Analog Debug Register 1 */
+#define SP_ANALOG_DEBUG1_REG		0xdc
+
+/* Analog Debug Register 2 */
+#define SP_ANALOG_DEBUG2_REG		0xdd
+#define SP_FORCE_SW_OFF_BYPASS		0x20
+#define SP_XTAL_FRQ			0x1c
+#  define SP_XTAL_FRQ_19M2		(0x00 << 2)
+#  define SP_XTAL_FRQ_24M		(0x01 << 2)
+#  define SP_XTAL_FRQ_25M		(0x02 << 2)
+#  define SP_XTAL_FRQ_26M		(0x03 << 2)
+#  define SP_XTAL_FRQ_27M		(0x04 << 2)
+#  define SP_XTAL_FRQ_38M4		(0x05 << 2)
+#  define SP_XTAL_FRQ_52M		(0x06 << 2)
+#define SP_POWERON_TIME_1P5MS		0x03
+
+/* Analog Control 0 Register */
+#define SP_ANALOG_CTRL0_REG		0xe1
+
+/* Common Interrupt Status Register 1 */
+#define SP_COMMON_INT_STATUS_BASE	(0xf1 - 1)
+#define SP_PLL_LOCK_CHG			0x40
+
+/* Common Interrupt Status Register 2 */
+#define SP_COMMON_INT_STATUS2		0xf2
+#define SP_HDCP_AUTH_CHG		BIT(1)
+#define SP_HDCP_AUTH_DONE		BIT(0)
+
+#define SP_HDCP_LINK_CHECK_FAIL		BIT(0)
+
+/* Common Interrupt Status Register 4 */
+#define SP_COMMON_INT_STATUS4_REG	0xf4
+#define SP_HPD_IRQ			BIT(6)
+#define SP_HPD_ESYNC_ERR		BIT(4)
+#define SP_HPD_CHG			BIT(2)
+#define SP_HPD_LOST			BIT(1)
+#define SP_HPD_PLUG			BIT(0)
+
+/* DP Interrupt Status Register */
+#define SP_DP_INT_STATUS1_REG		0xf7
+#define SP_TRAINING_FINISH		BIT(5)
+#define SP_POLLING_ERR			BIT(4)
+
+/* Common Interrupt Mask Register */
+#define SP_COMMON_INT_MASK_BASE		(0xf8 - 1)
+
+#define SP_COMMON_INT_MASK4_REG		0xfb
+
+/* DP Interrupts Mask Register */
+#define SP_DP_INT_MASK1_REG		0xfe
+
+/* Interrupt Control Register */
+#define SP_INT_CTRL_REG			0xff
+
+#endif /* _ANALOGIX_I2C_TXCOMMON_H_ */
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
new file mode 100644
index 000000000..df9370e0f
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -0,0 +1,1910 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+* Analogix DP (Display Port) core interface driver.
+*
+* Copyright (C) 2012 Samsung Electronics Co., Ltd.
+* Author: Jingoo Han <jg1.han@samsung.com>
+*/
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#include <drm/bridge/analogix_dp.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix_dp_core.h"
+#include "analogix_dp_reg.h"
+
+#define to_dp(nm)	container_of(nm, struct analogix_dp_device, nm)
+
+static const bool verify_fast_training;
+
+struct bridge_init {
+	struct i2c_client *client;
+	struct device_node *node;
+};
+
+static int analogix_dp_init_dp(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	analogix_dp_reset(dp);
+
+	analogix_dp_swreset(dp);
+
+	analogix_dp_init_analog_param(dp);
+	analogix_dp_init_interrupt(dp);
+
+	/* SW defined function Normal operation */
+	analogix_dp_enable_sw_function(dp);
+
+	analogix_dp_config_interrupt(dp);
+	ret = analogix_dp_init_analog_func(dp);
+	if (ret)
+		return ret;
+
+	analogix_dp_init_hpd(dp);
+	analogix_dp_init_aux(dp);
+	return 0;
+}
+
+static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
+{
+	int timeout_loop = 0;
+
+	while (timeout_loop < DP_TIMEOUT_LOOP_COUNT) {
+		if (analogix_dp_get_plug_in_status(dp) == 0)
+			return 0;
+
+		timeout_loop++;
+		usleep_range(1000, 1100);
+	}
+
+	/*
+	 * Some edp screen do not have hpd signal, so we can't just
+	 * return failed when hpd plug in detect failed, DT property
+	 * "force-hpd" would indicate whether driver need this.
+	 */
+	if (!dp->force_hpd)
+		return -ETIMEDOUT;
+
+	/*
+	 * The eDP TRM indicate that if HPD_STATUS(RO) is 0, AUX CH
+	 * will not work, so we need to give a force hpd action to
+	 * set HPD_STATUS manually.
+	 */
+	dev_dbg(dp->dev, "failed to get hpd plug status, try to force hpd\n");
+
+	analogix_dp_force_hpd(dp);
+
+	if (analogix_dp_get_plug_in_status(dp) != 0) {
+		dev_err(dp->dev, "failed to get hpd plug in status\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dp->dev, "success to get plug in status after force hpd\n");
+
+	return 0;
+}
+
+static bool analogix_dp_detect_sink_psr(struct analogix_dp_device *dp)
+{
+	unsigned char psr_version;
+	int ret;
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to get PSR version, disable it\n");
+		return false;
+	}
+
+	dev_dbg(dp->dev, "Panel PSR version : %x\n", psr_version);
+	return psr_version & DP_PSR_IS_SUPPORTED;
+}
+
+static int analogix_dp_enable_sink_psr(struct analogix_dp_device *dp)
+{
+	unsigned char psr_en;
+	int ret;
+
+	/* Disable psr function */
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to get psr config\n");
+		goto end;
+	}
+
+	psr_en &= ~DP_PSR_ENABLE;
+	ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to disable panel psr\n");
+		goto end;
+	}
+
+	/* Main-Link transmitter remains active during PSR active states */
+	psr_en = DP_PSR_CRC_VERIFICATION;
+	ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to set panel psr\n");
+		goto end;
+	}
+
+	/* Enable psr function */
+	psr_en = DP_PSR_ENABLE | DP_PSR_CRC_VERIFICATION;
+	ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to set panel psr\n");
+		goto end;
+	}
+
+	analogix_dp_enable_psr_crc(dp);
+
+	dp->psr_supported = true;
+
+	return 0;
+end:
+	dev_err(dp->dev, "enable psr fail, force to disable psr\n");
+
+	return ret;
+}
+
+static int
+analogix_dp_enable_rx_to_enhanced_mode(struct analogix_dp_device *dp,
+				       bool enable)
+{
+	u8 data;
+	int ret;
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data);
+	if (ret != 1)
+		return ret;
+
+	if (enable)
+		ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET,
+					 DP_LANE_COUNT_ENHANCED_FRAME_EN |
+					 DPCD_LANE_COUNT_SET(data));
+	else
+		ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET,
+					 DPCD_LANE_COUNT_SET(data));
+
+	return ret < 0 ? ret : 0;
+}
+
+static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp,
+						  u8 *enhanced_mode_support)
+{
+	u8 data;
+	int ret;
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data);
+	if (ret != 1) {
+		*enhanced_mode_support = 0;
+		return ret;
+	}
+
+	*enhanced_mode_support = DPCD_ENHANCED_FRAME_CAP(data);
+
+	return 0;
+}
+
+static int analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp)
+{
+	u8 data;
+	int ret;
+
+	ret = analogix_dp_is_enhanced_mode_available(dp, &data);
+	if (ret < 0)
+		return ret;
+
+	ret = analogix_dp_enable_rx_to_enhanced_mode(dp, data);
+	if (ret < 0)
+		return ret;
+
+	analogix_dp_enable_enhanced_mode(dp, data);
+
+	return 0;
+}
+
+static int analogix_dp_training_pattern_dis(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	analogix_dp_set_training_pattern(dp, DP_NONE);
+
+	ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+				 DP_TRAINING_PATTERN_DISABLE);
+
+	return ret < 0 ? ret : 0;
+}
+
+static void
+analogix_dp_set_lane_lane_pre_emphasis(struct analogix_dp_device *dp,
+				       int pre_emphasis, int lane)
+{
+	switch (lane) {
+	case 0:
+		analogix_dp_set_lane0_pre_emphasis(dp, pre_emphasis);
+		break;
+	case 1:
+		analogix_dp_set_lane1_pre_emphasis(dp, pre_emphasis);
+		break;
+
+	case 2:
+		analogix_dp_set_lane2_pre_emphasis(dp, pre_emphasis);
+		break;
+
+	case 3:
+		analogix_dp_set_lane3_pre_emphasis(dp, pre_emphasis);
+		break;
+	}
+}
+
+static int analogix_dp_link_start(struct analogix_dp_device *dp)
+{
+	u8 buf[4];
+	int lane, lane_count, pll_tries, retval;
+
+	lane_count = dp->link_train.lane_count;
+
+	dp->link_train.lt_state = CLOCK_RECOVERY;
+	dp->link_train.eq_loop = 0;
+
+	for (lane = 0; lane < lane_count; lane++)
+		dp->link_train.cr_loop[lane] = 0;
+
+	/* Set link rate and count as you want to establish*/
+	analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate);
+	analogix_dp_set_lane_count(dp, dp->link_train.lane_count);
+
+	/* Setup RX configuration */
+	buf[0] = dp->link_train.link_rate;
+	buf[1] = dp->link_train.lane_count;
+	retval = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, 2);
+	if (retval < 0)
+		return retval;
+	/* set enhanced mode if available */
+	retval = analogix_dp_set_enhanced_mode(dp);
+	if (retval < 0) {
+		dev_err(dp->dev, "failed to set enhance mode\n");
+		return retval;
+	}
+
+	/* Set TX pre-emphasis to minimum */
+	for (lane = 0; lane < lane_count; lane++)
+		analogix_dp_set_lane_lane_pre_emphasis(dp,
+			PRE_EMPHASIS_LEVEL_0, lane);
+
+	/* Wait for PLL lock */
+	pll_tries = 0;
+	while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+		if (pll_tries == DP_TIMEOUT_LOOP_COUNT) {
+			dev_err(dp->dev, "Wait for PLL lock timed out\n");
+			return -ETIMEDOUT;
+		}
+
+		pll_tries++;
+		usleep_range(90, 120);
+	}
+
+	/* Set training pattern 1 */
+	analogix_dp_set_training_pattern(dp, TRAINING_PTN1);
+
+	/* Set RX training pattern */
+	retval = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+				    DP_LINK_SCRAMBLING_DISABLE |
+					DP_TRAINING_PATTERN_1);
+	if (retval < 0)
+		return retval;
+
+	for (lane = 0; lane < lane_count; lane++)
+		buf[lane] = DP_TRAIN_PRE_EMPH_LEVEL_0 |
+			    DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
+
+	retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, buf,
+				   lane_count);
+	if (retval < 0)
+		return retval;
+
+	return 0;
+}
+
+static unsigned char analogix_dp_get_lane_status(u8 link_status[2], int lane)
+{
+	int shift = (lane & 1) * 4;
+	u8 link_value = link_status[lane >> 1];
+
+	return (link_value >> shift) & 0xf;
+}
+
+static int analogix_dp_clock_recovery_ok(u8 link_status[2], int lane_count)
+{
+	int lane;
+	u8 lane_status;
+
+	for (lane = 0; lane < lane_count; lane++) {
+		lane_status = analogix_dp_get_lane_status(link_status, lane);
+		if ((lane_status & DP_LANE_CR_DONE) == 0)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static int analogix_dp_channel_eq_ok(u8 link_status[2], u8 link_align,
+				     int lane_count)
+{
+	int lane;
+	u8 lane_status;
+
+	if ((link_align & DP_INTERLANE_ALIGN_DONE) == 0)
+		return -EINVAL;
+
+	for (lane = 0; lane < lane_count; lane++) {
+		lane_status = analogix_dp_get_lane_status(link_status, lane);
+		lane_status &= DP_CHANNEL_EQ_BITS;
+		if (lane_status != DP_CHANNEL_EQ_BITS)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+static unsigned char
+analogix_dp_get_adjust_request_voltage(u8 adjust_request[2], int lane)
+{
+	int shift = (lane & 1) * 4;
+	u8 link_value = adjust_request[lane >> 1];
+
+	return (link_value >> shift) & 0x3;
+}
+
+static unsigned char analogix_dp_get_adjust_request_pre_emphasis(
+					u8 adjust_request[2],
+					int lane)
+{
+	int shift = (lane & 1) * 4;
+	u8 link_value = adjust_request[lane >> 1];
+
+	return ((link_value >> shift) & 0xc) >> 2;
+}
+
+static void analogix_dp_set_lane_link_training(struct analogix_dp_device *dp,
+					       u8 training_lane_set, int lane)
+{
+	switch (lane) {
+	case 0:
+		analogix_dp_set_lane0_link_training(dp, training_lane_set);
+		break;
+	case 1:
+		analogix_dp_set_lane1_link_training(dp, training_lane_set);
+		break;
+
+	case 2:
+		analogix_dp_set_lane2_link_training(dp, training_lane_set);
+		break;
+
+	case 3:
+		analogix_dp_set_lane3_link_training(dp, training_lane_set);
+		break;
+	}
+}
+
+static unsigned int
+analogix_dp_get_lane_link_training(struct analogix_dp_device *dp,
+				   int lane)
+{
+	u32 reg;
+
+	switch (lane) {
+	case 0:
+		reg = analogix_dp_get_lane0_link_training(dp);
+		break;
+	case 1:
+		reg = analogix_dp_get_lane1_link_training(dp);
+		break;
+	case 2:
+		reg = analogix_dp_get_lane2_link_training(dp);
+		break;
+	case 3:
+		reg = analogix_dp_get_lane3_link_training(dp);
+		break;
+	default:
+		WARN_ON(1);
+		return 0;
+	}
+
+	return reg;
+}
+
+static void analogix_dp_reduce_link_rate(struct analogix_dp_device *dp)
+{
+	analogix_dp_training_pattern_dis(dp);
+	analogix_dp_set_enhanced_mode(dp);
+
+	dp->link_train.lt_state = FAILED;
+}
+
+static void analogix_dp_get_adjust_training_lane(struct analogix_dp_device *dp,
+						 u8 adjust_request[2])
+{
+	int lane, lane_count;
+	u8 voltage_swing, pre_emphasis, training_lane;
+
+	lane_count = dp->link_train.lane_count;
+	for (lane = 0; lane < lane_count; lane++) {
+		voltage_swing = analogix_dp_get_adjust_request_voltage(
+						adjust_request, lane);
+		pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis(
+						adjust_request, lane);
+		training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) |
+				DPCD_PRE_EMPHASIS_SET(pre_emphasis);
+
+		if (voltage_swing == VOLTAGE_LEVEL_3)
+			training_lane |= DP_TRAIN_MAX_SWING_REACHED;
+		if (pre_emphasis == PRE_EMPHASIS_LEVEL_3)
+			training_lane |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+
+		dp->link_train.training_lane[lane] = training_lane;
+	}
+}
+
+static int analogix_dp_process_clock_recovery(struct analogix_dp_device *dp)
+{
+	int lane, lane_count, retval;
+	u8 voltage_swing, pre_emphasis, training_lane;
+	u8 link_status[2], adjust_request[2];
+
+	usleep_range(100, 101);
+
+	lane_count = dp->link_train.lane_count;
+
+	retval = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status, 2);
+	if (retval < 0)
+		return retval;
+
+	retval = drm_dp_dpcd_read(&dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+				  adjust_request, 2);
+	if (retval < 0)
+		return retval;
+
+	if (analogix_dp_clock_recovery_ok(link_status, lane_count) == 0) {
+		/* set training pattern 2 for EQ */
+		analogix_dp_set_training_pattern(dp, TRAINING_PTN2);
+
+		retval = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+					    DP_LINK_SCRAMBLING_DISABLE |
+						DP_TRAINING_PATTERN_2);
+		if (retval < 0)
+			return retval;
+
+		dev_dbg(dp->dev, "Link Training Clock Recovery success\n");
+		dp->link_train.lt_state = EQUALIZER_TRAINING;
+	} else {
+		for (lane = 0; lane < lane_count; lane++) {
+			training_lane = analogix_dp_get_lane_link_training(
+							dp, lane);
+			voltage_swing = analogix_dp_get_adjust_request_voltage(
+							adjust_request, lane);
+			pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis(
+							adjust_request, lane);
+
+			if (DPCD_VOLTAGE_SWING_GET(training_lane) ==
+					voltage_swing &&
+			    DPCD_PRE_EMPHASIS_GET(training_lane) ==
+					pre_emphasis)
+				dp->link_train.cr_loop[lane]++;
+
+			if (dp->link_train.cr_loop[lane] == MAX_CR_LOOP ||
+			    voltage_swing == VOLTAGE_LEVEL_3 ||
+			    pre_emphasis == PRE_EMPHASIS_LEVEL_3) {
+				dev_err(dp->dev, "CR Max reached (%d,%d,%d)\n",
+					dp->link_train.cr_loop[lane],
+					voltage_swing, pre_emphasis);
+				analogix_dp_reduce_link_rate(dp);
+				return -EIO;
+			}
+		}
+	}
+
+	analogix_dp_get_adjust_training_lane(dp, adjust_request);
+
+	for (lane = 0; lane < lane_count; lane++)
+		analogix_dp_set_lane_link_training(dp,
+			dp->link_train.training_lane[lane], lane);
+
+	retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+				   dp->link_train.training_lane, lane_count);
+	if (retval < 0)
+		return retval;
+
+	return 0;
+}
+
+static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp)
+{
+	int lane, lane_count, retval;
+	u32 reg;
+	u8 link_align, link_status[2], adjust_request[2];
+
+	usleep_range(400, 401);
+
+	lane_count = dp->link_train.lane_count;
+
+	retval = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status, 2);
+	if (retval < 0)
+		return retval;
+
+	if (analogix_dp_clock_recovery_ok(link_status, lane_count)) {
+		analogix_dp_reduce_link_rate(dp);
+		return -EIO;
+	}
+
+	retval = drm_dp_dpcd_read(&dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+				  adjust_request, 2);
+	if (retval < 0)
+		return retval;
+
+	retval = drm_dp_dpcd_readb(&dp->aux, DP_LANE_ALIGN_STATUS_UPDATED,
+				   &link_align);
+	if (retval < 0)
+		return retval;
+
+	analogix_dp_get_adjust_training_lane(dp, adjust_request);
+
+	if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) {
+		/* traing pattern Set to Normal */
+		retval = analogix_dp_training_pattern_dis(dp);
+		if (retval < 0)
+			return retval;
+
+		dev_dbg(dp->dev, "Link Training success!\n");
+		analogix_dp_get_link_bandwidth(dp, &reg);
+		dp->link_train.link_rate = reg;
+		dev_dbg(dp->dev, "final bandwidth = %.2x\n",
+			dp->link_train.link_rate);
+
+		analogix_dp_get_lane_count(dp, &reg);
+		dp->link_train.lane_count = reg;
+		dev_dbg(dp->dev, "final lane count = %.2x\n",
+			dp->link_train.lane_count);
+
+		dp->link_train.lt_state = FINISHED;
+
+		return 0;
+	}
+
+	/* not all locked */
+	dp->link_train.eq_loop++;
+
+	if (dp->link_train.eq_loop > MAX_EQ_LOOP) {
+		dev_err(dp->dev, "EQ Max loop\n");
+		analogix_dp_reduce_link_rate(dp);
+		return -EIO;
+	}
+
+	for (lane = 0; lane < lane_count; lane++)
+		analogix_dp_set_lane_link_training(dp,
+			dp->link_train.training_lane[lane], lane);
+
+	retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+				   dp->link_train.training_lane, lane_count);
+	if (retval < 0)
+		return retval;
+
+	return 0;
+}
+
+static void analogix_dp_get_max_rx_bandwidth(struct analogix_dp_device *dp,
+					     u8 *bandwidth)
+{
+	u8 data;
+
+	/*
+	 * For DP rev.1.1, Maximum link rate of Main Link lanes
+	 * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps
+	 * For DP rev.1.2, Maximum link rate of Main Link lanes
+	 * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps, 0x14 = 5.4Gbps
+	 */
+	drm_dp_dpcd_readb(&dp->aux, DP_MAX_LINK_RATE, &data);
+	*bandwidth = data;
+}
+
+static void analogix_dp_get_max_rx_lane_count(struct analogix_dp_device *dp,
+					      u8 *lane_count)
+{
+	u8 data;
+
+	/*
+	 * For DP rev.1.1, Maximum number of Main Link lanes
+	 * 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes
+	 */
+	drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data);
+	*lane_count = DPCD_MAX_LANE_COUNT(data);
+}
+
+static int analogix_dp_full_link_train(struct analogix_dp_device *dp,
+				       u32 max_lanes, u32 max_rate)
+{
+	int retval = 0;
+	bool training_finished = false;
+
+	/*
+	 * MACRO_RST must be applied after the PLL_LOCK to avoid
+	 * the DP inter pair skew issue for at least 10 us
+	 */
+	analogix_dp_reset_macro(dp);
+
+	/* Initialize by reading RX's DPCD */
+	analogix_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate);
+	analogix_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count);
+
+	if ((dp->link_train.link_rate != DP_LINK_BW_1_62) &&
+	    (dp->link_train.link_rate != DP_LINK_BW_2_7) &&
+	    (dp->link_train.link_rate != DP_LINK_BW_5_4)) {
+		dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n",
+			dp->link_train.link_rate);
+		dp->link_train.link_rate = DP_LINK_BW_1_62;
+	}
+
+	if (dp->link_train.lane_count == 0) {
+		dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n",
+			dp->link_train.lane_count);
+		dp->link_train.lane_count = (u8)LANE_COUNT1;
+	}
+
+	/* Setup TX lane count & rate */
+	if (dp->link_train.lane_count > max_lanes)
+		dp->link_train.lane_count = max_lanes;
+	if (dp->link_train.link_rate > max_rate)
+		dp->link_train.link_rate = max_rate;
+
+	/* All DP analog module power up */
+	analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
+
+	dp->link_train.lt_state = START;
+
+	/* Process here */
+	while (!retval && !training_finished) {
+		switch (dp->link_train.lt_state) {
+		case START:
+			retval = analogix_dp_link_start(dp);
+			if (retval)
+				dev_err(dp->dev, "LT link start failed!\n");
+			break;
+		case CLOCK_RECOVERY:
+			retval = analogix_dp_process_clock_recovery(dp);
+			if (retval)
+				dev_err(dp->dev, "LT CR failed!\n");
+			break;
+		case EQUALIZER_TRAINING:
+			retval = analogix_dp_process_equalizer_training(dp);
+			if (retval)
+				dev_err(dp->dev, "LT EQ failed!\n");
+			break;
+		case FINISHED:
+			training_finished = 1;
+			break;
+		case FAILED:
+			return -EREMOTEIO;
+		}
+	}
+	if (retval)
+		dev_err(dp->dev, "eDP link training failed (%d)\n", retval);
+
+	return retval;
+}
+
+static int analogix_dp_fast_link_train(struct analogix_dp_device *dp)
+{
+	int i, ret;
+	u8 link_align, link_status[2];
+	enum pll_status status;
+
+	analogix_dp_reset_macro(dp);
+
+	analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate);
+	analogix_dp_set_lane_count(dp, dp->link_train.lane_count);
+
+	for (i = 0; i < dp->link_train.lane_count; i++) {
+		analogix_dp_set_lane_link_training(dp,
+			dp->link_train.training_lane[i], i);
+	}
+
+	ret = readx_poll_timeout(analogix_dp_get_pll_lock_status, dp, status,
+				 status != PLL_UNLOCKED, 120,
+				 120 * DP_TIMEOUT_LOOP_COUNT);
+	if (ret) {
+		DRM_DEV_ERROR(dp->dev, "Wait for pll lock failed %d\n", ret);
+		return ret;
+	}
+
+	/* source Set training pattern 1 */
+	analogix_dp_set_training_pattern(dp, TRAINING_PTN1);
+	/* From DP spec, pattern must be on-screen for a minimum 500us */
+	usleep_range(500, 600);
+
+	analogix_dp_set_training_pattern(dp, TRAINING_PTN2);
+	/* From DP spec, pattern must be on-screen for a minimum 500us */
+	usleep_range(500, 600);
+
+	/* TODO: enhanced_mode?*/
+	analogix_dp_set_training_pattern(dp, DP_NONE);
+
+	/*
+	 * Useful for debugging issues with fast link training, disable for more
+	 * speed
+	 */
+	if (verify_fast_training) {
+		ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_ALIGN_STATUS_UPDATED,
+					&link_align);
+		if (ret < 0) {
+			DRM_DEV_ERROR(dp->dev, "Read align status failed %d\n",
+				      ret);
+			return ret;
+		}
+
+		ret = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status,
+				       2);
+		if (ret < 0) {
+			DRM_DEV_ERROR(dp->dev, "Read link status failed %d\n",
+				      ret);
+			return ret;
+		}
+
+		if (analogix_dp_clock_recovery_ok(link_status,
+						  dp->link_train.lane_count)) {
+			DRM_DEV_ERROR(dp->dev, "Clock recovery failed\n");
+			analogix_dp_reduce_link_rate(dp);
+			return -EIO;
+		}
+
+		if (analogix_dp_channel_eq_ok(link_status, link_align,
+					      dp->link_train.lane_count)) {
+			DRM_DEV_ERROR(dp->dev, "Channel EQ failed\n");
+			analogix_dp_reduce_link_rate(dp);
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int analogix_dp_train_link(struct analogix_dp_device *dp)
+{
+	if (dp->fast_train_enable)
+		return analogix_dp_fast_link_train(dp);
+
+	return analogix_dp_full_link_train(dp, dp->video_info.max_lane_count,
+					   dp->video_info.max_link_rate);
+}
+
+static int analogix_dp_config_video(struct analogix_dp_device *dp)
+{
+	int timeout_loop = 0;
+	int done_count = 0;
+
+	analogix_dp_config_video_slave_mode(dp);
+
+	analogix_dp_set_video_color_format(dp);
+
+	if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+		dev_err(dp->dev, "PLL is not locked yet.\n");
+		return -EINVAL;
+	}
+
+	for (;;) {
+		timeout_loop++;
+		if (analogix_dp_is_slave_video_stream_clock_on(dp) == 0)
+			break;
+		if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
+			dev_err(dp->dev, "Timeout of slave video streamclk ok\n");
+			return -ETIMEDOUT;
+		}
+		usleep_range(1000, 1001);
+	}
+
+	/* Set to use the register calculated M/N video */
+	analogix_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0);
+
+	/* For video bist, Video timing must be generated by register */
+	analogix_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE);
+
+	/* Disable video mute */
+	analogix_dp_enable_video_mute(dp, 0);
+
+	/* Configure video slave mode */
+	analogix_dp_enable_video_master(dp, 0);
+
+	/* Enable video */
+	analogix_dp_start_video(dp);
+
+	timeout_loop = 0;
+
+	for (;;) {
+		timeout_loop++;
+		if (analogix_dp_is_video_stream_on(dp) == 0) {
+			done_count++;
+			if (done_count > 10)
+				break;
+		} else if (done_count) {
+			done_count = 0;
+		}
+		if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
+			dev_warn(dp->dev,
+				 "Ignoring timeout of video streamclk ok\n");
+			break;
+		}
+
+		usleep_range(1000, 1001);
+	}
+
+	return 0;
+}
+
+static int analogix_dp_enable_scramble(struct analogix_dp_device *dp,
+				       bool enable)
+{
+	u8 data;
+	int ret;
+
+	if (enable) {
+		analogix_dp_enable_scrambling(dp);
+
+		ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET,
+					&data);
+		if (ret != 1)
+			return ret;
+		ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+				   (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE));
+	} else {
+		analogix_dp_disable_scrambling(dp);
+
+		ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET,
+					&data);
+		if (ret != 1)
+			return ret;
+		ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+				   (u8)(data | DP_LINK_SCRAMBLING_DISABLE));
+	}
+	return ret < 0 ? ret : 0;
+}
+
+static irqreturn_t analogix_dp_hardirq(int irq, void *arg)
+{
+	struct analogix_dp_device *dp = arg;
+	irqreturn_t ret = IRQ_NONE;
+	enum dp_irq_type irq_type;
+
+	irq_type = analogix_dp_get_irq_type(dp);
+	if (irq_type != DP_IRQ_TYPE_UNKNOWN) {
+		analogix_dp_mute_hpd_interrupt(dp);
+		ret = IRQ_WAKE_THREAD;
+	}
+
+	return ret;
+}
+
+static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
+{
+	struct analogix_dp_device *dp = arg;
+	enum dp_irq_type irq_type;
+
+	irq_type = analogix_dp_get_irq_type(dp);
+	if (irq_type & DP_IRQ_TYPE_HP_CABLE_IN ||
+	    irq_type & DP_IRQ_TYPE_HP_CABLE_OUT) {
+		dev_dbg(dp->dev, "Detected cable status changed!\n");
+		if (dp->drm_dev)
+			drm_helper_hpd_irq_event(dp->drm_dev);
+	}
+
+	if (irq_type != DP_IRQ_TYPE_UNKNOWN) {
+		analogix_dp_clear_hotplug_interrupts(dp);
+		analogix_dp_unmute_hpd_interrupt(dp);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int analogix_dp_fast_link_train_detection(struct analogix_dp_device *dp)
+{
+	int ret;
+	u8 spread;
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_DOWNSPREAD, &spread);
+	if (ret != 1) {
+		dev_err(dp->dev, "failed to read downspread %d\n", ret);
+		return ret;
+	}
+	dp->fast_train_enable = !!(spread & DP_NO_AUX_HANDSHAKE_LINK_TRAINING);
+	dev_dbg(dp->dev, "fast link training %s\n",
+		dp->fast_train_enable ? "supported" : "unsupported");
+	return 0;
+}
+
+static int analogix_dp_commit(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	/* Keep the panel disabled while we configure video */
+	if (dp->plat_data->panel) {
+		if (drm_panel_disable(dp->plat_data->panel))
+			DRM_ERROR("failed to disable the panel\n");
+	}
+
+	ret = analogix_dp_train_link(dp);
+	if (ret) {
+		dev_err(dp->dev, "unable to do link train, ret=%d\n", ret);
+		return ret;
+	}
+
+	ret = analogix_dp_enable_scramble(dp, 1);
+	if (ret < 0) {
+		dev_err(dp->dev, "can not enable scramble\n");
+		return ret;
+	}
+
+	analogix_dp_init_video(dp);
+	ret = analogix_dp_config_video(dp);
+	if (ret) {
+		dev_err(dp->dev, "unable to config video\n");
+		return ret;
+	}
+
+	/* Safe to enable the panel now */
+	if (dp->plat_data->panel) {
+		ret = drm_panel_enable(dp->plat_data->panel);
+		if (ret) {
+			DRM_ERROR("failed to enable the panel\n");
+			return ret;
+		}
+	}
+
+	/* Check whether panel supports fast training */
+	ret = analogix_dp_fast_link_train_detection(dp);
+	if (ret)
+		return ret;
+
+	if (analogix_dp_detect_sink_psr(dp)) {
+		ret = analogix_dp_enable_sink_psr(dp);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static int analogix_dp_enable_psr(struct analogix_dp_device *dp)
+{
+	struct dp_sdp psr_vsc;
+	int ret;
+	u8 sink;
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink);
+	if (ret != 1)
+		DRM_DEV_ERROR(dp->dev, "Failed to read psr status %d\n", ret);
+	else if (sink == DP_PSR_SINK_ACTIVE_RFB)
+		return 0;
+
+	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+	memset(&psr_vsc, 0, sizeof(psr_vsc));
+	psr_vsc.sdp_header.HB0 = 0;
+	psr_vsc.sdp_header.HB1 = 0x7;
+	psr_vsc.sdp_header.HB2 = 0x2;
+	psr_vsc.sdp_header.HB3 = 0x8;
+	psr_vsc.db[0] = 0;
+	psr_vsc.db[1] = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID;
+
+	ret = analogix_dp_send_psr_spd(dp, &psr_vsc, true);
+	if (!ret)
+		analogix_dp_set_analog_power_down(dp, POWER_ALL, true);
+
+	return ret;
+}
+
+static int analogix_dp_disable_psr(struct analogix_dp_device *dp)
+{
+	struct dp_sdp psr_vsc;
+	int ret;
+	u8 sink;
+
+	analogix_dp_set_analog_power_down(dp, POWER_ALL, false);
+
+	ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+	if (ret != 1) {
+		DRM_DEV_ERROR(dp->dev, "Failed to set DP Power0 %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink);
+	if (ret != 1) {
+		DRM_DEV_ERROR(dp->dev, "Failed to read psr status %d\n", ret);
+		return ret;
+	} else if (sink == DP_PSR_SINK_INACTIVE) {
+		DRM_DEV_ERROR(dp->dev, "sink inactive, skip disable psr");
+		return 0;
+	}
+
+	ret = analogix_dp_train_link(dp);
+	if (ret) {
+		DRM_DEV_ERROR(dp->dev, "Failed to train the link %d\n", ret);
+		return ret;
+	}
+
+	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+	memset(&psr_vsc, 0, sizeof(psr_vsc));
+	psr_vsc.sdp_header.HB0 = 0;
+	psr_vsc.sdp_header.HB1 = 0x7;
+	psr_vsc.sdp_header.HB2 = 0x2;
+	psr_vsc.sdp_header.HB3 = 0x8;
+
+	psr_vsc.db[0] = 0;
+	psr_vsc.db[1] = 0;
+
+	return analogix_dp_send_psr_spd(dp, &psr_vsc, true);
+}
+
+/*
+ * This function is a bit of a catch-all for panel preparation, hopefully
+ * simplifying the logic of functions that need to prepare/unprepare the panel
+ * below.
+ *
+ * If @prepare is true, this function will prepare the panel. Conversely, if it
+ * is false, the panel will be unprepared.
+ *
+ * If @is_modeset_prepare is true, the function will disregard the current state
+ * of the panel and either prepare/unprepare the panel based on @prepare. Once
+ * it finishes, it will update dp->panel_is_modeset to reflect the current state
+ * of the panel.
+ */
+static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
+				     bool prepare, bool is_modeset_prepare)
+{
+	int ret = 0;
+
+	if (!dp->plat_data->panel)
+		return 0;
+
+	mutex_lock(&dp->panel_lock);
+
+	/*
+	 * Exit early if this is a temporary prepare/unprepare and we're already
+	 * modeset (since we neither want to prepare twice or unprepare early).
+	 */
+	if (dp->panel_is_modeset && !is_modeset_prepare)
+		goto out;
+
+	if (prepare)
+		ret = drm_panel_prepare(dp->plat_data->panel);
+	else
+		ret = drm_panel_unprepare(dp->plat_data->panel);
+
+	if (ret)
+		goto out;
+
+	if (is_modeset_prepare)
+		dp->panel_is_modeset = prepare;
+
+out:
+	mutex_unlock(&dp->panel_lock);
+	return ret;
+}
+
+static int analogix_dp_get_modes(struct drm_connector *connector)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+	struct edid *edid;
+	int ret, num_modes = 0;
+
+	if (dp->plat_data->panel) {
+		num_modes += drm_panel_get_modes(dp->plat_data->panel, connector);
+	} else {
+		ret = analogix_dp_prepare_panel(dp, true, false);
+		if (ret) {
+			DRM_ERROR("Failed to prepare panel (%d)\n", ret);
+			return 0;
+		}
+
+		edid = drm_get_edid(connector, &dp->aux.ddc);
+		if (edid) {
+			drm_connector_update_edid_property(&dp->connector,
+							   edid);
+			num_modes += drm_add_edid_modes(&dp->connector, edid);
+			kfree(edid);
+		}
+
+		ret = analogix_dp_prepare_panel(dp, false, false);
+		if (ret)
+			DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
+	}
+
+	if (dp->plat_data->get_modes)
+		num_modes += dp->plat_data->get_modes(dp->plat_data, connector);
+
+	return num_modes;
+}
+
+static struct drm_encoder *
+analogix_dp_best_encoder(struct drm_connector *connector)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+
+	return dp->encoder;
+}
+
+
+static int analogix_dp_atomic_check(struct drm_connector *connector,
+				    struct drm_atomic_state *state)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+	struct drm_connector_state *conn_state;
+	struct drm_crtc_state *crtc_state;
+
+	conn_state = drm_atomic_get_new_connector_state(state, connector);
+	if (WARN_ON(!conn_state))
+		return -ENODEV;
+
+	conn_state->self_refresh_aware = true;
+
+	if (!conn_state->crtc)
+		return 0;
+
+	crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+	if (!crtc_state)
+		return 0;
+
+	if (crtc_state->self_refresh_active && !dp->psr_supported)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs analogix_dp_connector_helper_funcs = {
+	.get_modes = analogix_dp_get_modes,
+	.best_encoder = analogix_dp_best_encoder,
+	.atomic_check = analogix_dp_atomic_check,
+};
+
+static enum drm_connector_status
+analogix_dp_detect(struct drm_connector *connector, bool force)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+	enum drm_connector_status status = connector_status_disconnected;
+	int ret;
+
+	if (dp->plat_data->panel)
+		return connector_status_connected;
+
+	ret = analogix_dp_prepare_panel(dp, true, false);
+	if (ret) {
+		DRM_ERROR("Failed to prepare panel (%d)\n", ret);
+		return connector_status_disconnected;
+	}
+
+	if (!analogix_dp_detect_hpd(dp))
+		status = connector_status_connected;
+
+	ret = analogix_dp_prepare_panel(dp, false, false);
+	if (ret)
+		DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
+
+	return status;
+}
+
+static const struct drm_connector_funcs analogix_dp_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.detect = analogix_dp_detect,
+	.destroy = drm_connector_cleanup,
+	.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 analogix_dp_bridge_attach(struct drm_bridge *bridge,
+				     enum drm_bridge_attach_flags flags)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_encoder *encoder = dp->encoder;
+	struct drm_connector *connector = NULL;
+	int ret = 0;
+
+	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+		DRM_ERROR("Fix bridge driver to make connector optional!");
+		return -EINVAL;
+	}
+
+	if (!bridge->encoder) {
+		DRM_ERROR("Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	if (!dp->plat_data->skip_connector) {
+		connector = &dp->connector;
+		connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+		ret = drm_connector_init(dp->drm_dev, connector,
+					 &analogix_dp_connector_funcs,
+					 DRM_MODE_CONNECTOR_eDP);
+		if (ret) {
+			DRM_ERROR("Failed to initialize connector with drm\n");
+			return ret;
+		}
+
+		drm_connector_helper_add(connector,
+					 &analogix_dp_connector_helper_funcs);
+		drm_connector_attach_encoder(connector, encoder);
+	}
+
+	/*
+	 * NOTE: the connector registration is implemented in analogix
+	 * platform driver, that to say connector would be exist after
+	 * plat_data->attch return, that's why we record the connector
+	 * point after plat attached.
+	 */
+	if (dp->plat_data->attach) {
+		ret = dp->plat_data->attach(dp->plat_data, bridge, connector);
+		if (ret) {
+			DRM_ERROR("Failed at platform attach func\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static
+struct drm_crtc *analogix_dp_get_old_crtc(struct analogix_dp_device *dp,
+					  struct drm_atomic_state *state)
+{
+	struct drm_encoder *encoder = dp->encoder;
+	struct drm_connector *connector;
+	struct drm_connector_state *conn_state;
+
+	connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
+	if (!connector)
+		return NULL;
+
+	conn_state = drm_atomic_get_old_connector_state(state, connector);
+	if (!conn_state)
+		return NULL;
+
+	return conn_state->crtc;
+}
+
+static
+struct drm_crtc *analogix_dp_get_new_crtc(struct analogix_dp_device *dp,
+					  struct drm_atomic_state *state)
+{
+	struct drm_encoder *encoder = dp->encoder;
+	struct drm_connector *connector;
+	struct drm_connector_state *conn_state;
+
+	connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
+	if (!connector)
+		return NULL;
+
+	conn_state = drm_atomic_get_new_connector_state(state, connector);
+	if (!conn_state)
+		return NULL;
+
+	return conn_state->crtc;
+}
+
+static void
+analogix_dp_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+				     struct drm_bridge_state *old_bridge_state)
+{
+	struct drm_atomic_state *old_state = old_bridge_state->base.state;
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state;
+	int ret;
+
+	crtc = analogix_dp_get_new_crtc(dp, old_state);
+	if (!crtc)
+		return;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc);
+	/* Don't touch the panel if we're coming back from PSR */
+	if (old_crtc_state && old_crtc_state->self_refresh_active)
+		return;
+
+	ret = analogix_dp_prepare_panel(dp, true, true);
+	if (ret)
+		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
+}
+
+static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	pm_runtime_get_sync(dp->dev);
+
+	ret = clk_prepare_enable(dp->clock);
+	if (ret < 0) {
+		DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
+		goto out_dp_clk_pre;
+	}
+
+	if (dp->plat_data->power_on_start)
+		dp->plat_data->power_on_start(dp->plat_data);
+
+	phy_power_on(dp->phy);
+
+	ret = analogix_dp_init_dp(dp);
+	if (ret)
+		goto out_dp_init;
+
+	/*
+	 * According to DP spec v1.3 chap 3.5.1.2 Link Training,
+	 * We should first make sure the HPD signal is asserted high by device
+	 * when we want to establish a link with it.
+	 */
+	ret = analogix_dp_detect_hpd(dp);
+	if (ret) {
+		DRM_ERROR("failed to get hpd single ret = %d\n", ret);
+		goto out_dp_init;
+	}
+
+	ret = analogix_dp_commit(dp);
+	if (ret) {
+		DRM_ERROR("dp commit error, ret = %d\n", ret);
+		goto out_dp_init;
+	}
+
+	if (dp->plat_data->power_on_end)
+		dp->plat_data->power_on_end(dp->plat_data);
+
+	enable_irq(dp->irq);
+	return 0;
+
+out_dp_init:
+	phy_power_off(dp->phy);
+	if (dp->plat_data->power_off)
+		dp->plat_data->power_off(dp->plat_data);
+	clk_disable_unprepare(dp->clock);
+out_dp_clk_pre:
+	pm_runtime_put_sync(dp->dev);
+
+	return ret;
+}
+
+static void
+analogix_dp_bridge_atomic_enable(struct drm_bridge *bridge,
+				 struct drm_bridge_state *old_bridge_state)
+{
+	struct drm_atomic_state *old_state = old_bridge_state->base.state;
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state;
+	int timeout_loop = 0;
+	int ret;
+
+	crtc = analogix_dp_get_new_crtc(dp, old_state);
+	if (!crtc)
+		return;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc);
+	/* Not a full enable, just disable PSR and continue */
+	if (old_crtc_state && old_crtc_state->self_refresh_active) {
+		ret = analogix_dp_disable_psr(dp);
+		if (ret)
+			DRM_ERROR("Failed to disable psr %d\n", ret);
+		return;
+	}
+
+	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
+		return;
+
+	while (timeout_loop < MAX_PLL_LOCK_LOOP) {
+		if (analogix_dp_set_bridge(dp) == 0) {
+			dp->dpms_mode = DRM_MODE_DPMS_ON;
+			return;
+		}
+		dev_err(dp->dev, "failed to set bridge, retry: %d\n",
+			timeout_loop);
+		timeout_loop++;
+		usleep_range(10, 11);
+	}
+	dev_err(dp->dev, "too many times retry set bridge, give it up\n");
+}
+
+static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	int ret;
+
+	if (dp->dpms_mode != DRM_MODE_DPMS_ON)
+		return;
+
+	if (dp->plat_data->panel) {
+		if (drm_panel_disable(dp->plat_data->panel)) {
+			DRM_ERROR("failed to disable the panel\n");
+			return;
+		}
+	}
+
+	disable_irq(dp->irq);
+
+	if (dp->plat_data->power_off)
+		dp->plat_data->power_off(dp->plat_data);
+
+	analogix_dp_set_analog_power_down(dp, POWER_ALL, 1);
+	phy_power_off(dp->phy);
+
+	clk_disable_unprepare(dp->clock);
+
+	pm_runtime_put_sync(dp->dev);
+
+	ret = analogix_dp_prepare_panel(dp, false, true);
+	if (ret)
+		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
+
+	dp->fast_train_enable = false;
+	dp->psr_supported = false;
+	dp->dpms_mode = DRM_MODE_DPMS_OFF;
+}
+
+static void
+analogix_dp_bridge_atomic_disable(struct drm_bridge *bridge,
+				  struct drm_bridge_state *old_bridge_state)
+{
+	struct drm_atomic_state *old_state = old_bridge_state->base.state;
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_crtc *old_crtc, *new_crtc;
+	struct drm_crtc_state *old_crtc_state = NULL;
+	struct drm_crtc_state *new_crtc_state = NULL;
+	int ret;
+
+	new_crtc = analogix_dp_get_new_crtc(dp, old_state);
+	if (!new_crtc)
+		goto out;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(old_state, new_crtc);
+	if (!new_crtc_state)
+		goto out;
+
+	/* Don't do a full disable on PSR transitions */
+	if (new_crtc_state->self_refresh_active)
+		return;
+
+out:
+	old_crtc = analogix_dp_get_old_crtc(dp, old_state);
+	if (old_crtc) {
+		old_crtc_state = drm_atomic_get_old_crtc_state(old_state,
+							       old_crtc);
+
+		/* When moving from PSR to fully disabled, exit PSR first. */
+		if (old_crtc_state && old_crtc_state->self_refresh_active) {
+			ret = analogix_dp_disable_psr(dp);
+			if (ret)
+				DRM_ERROR("Failed to disable psr (%d)\n", ret);
+		}
+	}
+
+	analogix_dp_bridge_disable(bridge);
+}
+
+static void
+analogix_dp_bridge_atomic_post_disable(struct drm_bridge *bridge,
+				struct drm_bridge_state *old_bridge_state)
+{
+	struct drm_atomic_state *old_state = old_bridge_state->base.state;
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *new_crtc_state;
+	int ret;
+
+	crtc = analogix_dp_get_new_crtc(dp, old_state);
+	if (!crtc)
+		return;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc);
+	if (!new_crtc_state || !new_crtc_state->self_refresh_active)
+		return;
+
+	ret = analogix_dp_enable_psr(dp);
+	if (ret)
+		DRM_ERROR("Failed to enable psr (%d)\n", ret);
+}
+
+static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge,
+				const struct drm_display_mode *orig_mode,
+				const struct drm_display_mode *mode)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	struct drm_display_info *display_info = &dp->connector.display_info;
+	struct video_info *video = &dp->video_info;
+	struct device_node *dp_node = dp->dev->of_node;
+	int vic;
+
+	/* Input video interlaces & hsync pol & vsync pol */
+	video->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+	video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
+	video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
+
+	/* Input video dynamic_range & colorimetry */
+	vic = drm_match_cea_mode(mode);
+	if ((vic == 6) || (vic == 7) || (vic == 21) || (vic == 22) ||
+	    (vic == 2) || (vic == 3) || (vic == 17) || (vic == 18)) {
+		video->dynamic_range = CEA;
+		video->ycbcr_coeff = COLOR_YCBCR601;
+	} else if (vic) {
+		video->dynamic_range = CEA;
+		video->ycbcr_coeff = COLOR_YCBCR709;
+	} else {
+		video->dynamic_range = VESA;
+		video->ycbcr_coeff = COLOR_YCBCR709;
+	}
+
+	/* Input vide bpc and color_formats */
+	switch (display_info->bpc) {
+	case 12:
+		video->color_depth = COLOR_12;
+		break;
+	case 10:
+		video->color_depth = COLOR_10;
+		break;
+	case 8:
+		video->color_depth = COLOR_8;
+		break;
+	case 6:
+		video->color_depth = COLOR_6;
+		break;
+	default:
+		video->color_depth = COLOR_8;
+		break;
+	}
+	if (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+		video->color_space = COLOR_YCBCR444;
+	else if (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+		video->color_space = COLOR_YCBCR422;
+	else
+		video->color_space = COLOR_RGB;
+
+	/*
+	 * NOTE: those property parsing code is used for providing backward
+	 * compatibility for samsung platform.
+	 * Due to we used the "of_property_read_u32" interfaces, when this
+	 * property isn't present, the "video_info" can keep the original
+	 * values and wouldn't be modified.
+	 */
+	of_property_read_u32(dp_node, "samsung,color-space",
+			     &video->color_space);
+	of_property_read_u32(dp_node, "samsung,dynamic-range",
+			     &video->dynamic_range);
+	of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
+			     &video->ycbcr_coeff);
+	of_property_read_u32(dp_node, "samsung,color-depth",
+			     &video->color_depth);
+	if (of_property_read_bool(dp_node, "hsync-active-high"))
+		video->h_sync_polarity = true;
+	if (of_property_read_bool(dp_node, "vsync-active-high"))
+		video->v_sync_polarity = true;
+	if (of_property_read_bool(dp_node, "interlaced"))
+		video->interlaced = true;
+}
+
+static const struct drm_bridge_funcs analogix_dp_bridge_funcs = {
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.atomic_pre_enable = analogix_dp_bridge_atomic_pre_enable,
+	.atomic_enable = analogix_dp_bridge_atomic_enable,
+	.atomic_disable = analogix_dp_bridge_atomic_disable,
+	.atomic_post_disable = analogix_dp_bridge_atomic_post_disable,
+	.mode_set = analogix_dp_bridge_mode_set,
+	.attach = analogix_dp_bridge_attach,
+};
+
+static int analogix_dp_create_bridge(struct drm_device *drm_dev,
+				     struct analogix_dp_device *dp)
+{
+	struct drm_bridge *bridge;
+
+	bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL);
+	if (!bridge) {
+		DRM_ERROR("failed to allocate for drm bridge\n");
+		return -ENOMEM;
+	}
+
+	dp->bridge = bridge;
+
+	bridge->driver_private = dp;
+	bridge->funcs = &analogix_dp_bridge_funcs;
+
+	return drm_bridge_attach(dp->encoder, bridge, NULL, 0);
+}
+
+static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)
+{
+	struct device_node *dp_node = dp->dev->of_node;
+	struct video_info *video_info = &dp->video_info;
+
+	switch (dp->plat_data->dev_type) {
+	case RK3288_DP:
+	case RK3399_EDP:
+		/*
+		 * Like Rk3288 DisplayPort TRM indicate that "Main link
+		 * containing 4 physical lanes of 2.7/1.62 Gbps/lane".
+		 */
+		video_info->max_link_rate = 0x0A;
+		video_info->max_lane_count = 0x04;
+		break;
+	case EXYNOS_DP:
+		/*
+		 * NOTE: those property parseing code is used for
+		 * providing backward compatibility for samsung platform.
+		 */
+		of_property_read_u32(dp_node, "samsung,link-rate",
+				     &video_info->max_link_rate);
+		of_property_read_u32(dp_node, "samsung,lane-count",
+				     &video_info->max_lane_count);
+		break;
+	}
+
+	return 0;
+}
+
+static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
+				       struct drm_dp_aux_msg *msg)
+{
+	struct analogix_dp_device *dp = to_dp(aux);
+	int ret;
+
+	pm_runtime_get_sync(dp->dev);
+
+	ret = analogix_dp_detect_hpd(dp);
+	if (ret)
+		goto out;
+
+	ret = analogix_dp_transfer(dp, msg);
+out:
+	pm_runtime_mark_last_busy(dp->dev);
+	pm_runtime_put_autosuspend(dp->dev);
+
+	return ret;
+}
+
+struct analogix_dp_device *
+analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct analogix_dp_device *dp;
+	struct resource *res;
+	unsigned int irq_flags;
+	int ret;
+
+	if (!plat_data) {
+		dev_err(dev, "Invalided input plat_data\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	dp = devm_kzalloc(dev, sizeof(struct analogix_dp_device), GFP_KERNEL);
+	if (!dp)
+		return ERR_PTR(-ENOMEM);
+
+	dp->dev = &pdev->dev;
+	dp->dpms_mode = DRM_MODE_DPMS_OFF;
+
+	mutex_init(&dp->panel_lock);
+	dp->panel_is_modeset = false;
+
+	/*
+	 * platform dp driver need containor_of the plat_data to get
+	 * the driver private data, so we need to store the point of
+	 * plat_data, not the context of plat_data.
+	 */
+	dp->plat_data = plat_data;
+
+	ret = analogix_dp_dt_parse_pdata(dp);
+	if (ret)
+		return ERR_PTR(ret);
+
+	dp->phy = devm_phy_get(dp->dev, "dp");
+	if (IS_ERR(dp->phy)) {
+		dev_err(dp->dev, "no DP phy configured\n");
+		ret = PTR_ERR(dp->phy);
+		if (ret) {
+			/*
+			 * phy itself is not enabled, so we can move forward
+			 * assigning NULL to phy pointer.
+			 */
+			if (ret == -ENOSYS || ret == -ENODEV)
+				dp->phy = NULL;
+			else
+				return ERR_PTR(ret);
+		}
+	}
+
+	dp->clock = devm_clk_get(&pdev->dev, "dp");
+	if (IS_ERR(dp->clock)) {
+		dev_err(&pdev->dev, "failed to get clock\n");
+		return ERR_CAST(dp->clock);
+	}
+
+	clk_prepare_enable(dp->clock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	dp->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dp->reg_base)) {
+		ret = PTR_ERR(dp->reg_base);
+		goto err_disable_clk;
+	}
+
+	dp->force_hpd = of_property_read_bool(dev->of_node, "force-hpd");
+
+	/* Try two different names */
+	dp->hpd_gpiod = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
+	if (!dp->hpd_gpiod)
+		dp->hpd_gpiod = devm_gpiod_get_optional(dev, "samsung,hpd",
+							GPIOD_IN);
+	if (IS_ERR(dp->hpd_gpiod)) {
+		dev_err(dev, "error getting HDP GPIO: %ld\n",
+			PTR_ERR(dp->hpd_gpiod));
+		ret = PTR_ERR(dp->hpd_gpiod);
+		goto err_disable_clk;
+	}
+
+	if (dp->hpd_gpiod) {
+		/*
+		 * Set up the hotplug GPIO from the device tree as an interrupt.
+		 * Simply specifying a different interrupt in the device tree
+		 * doesn't work since we handle hotplug rather differently when
+		 * using a GPIO.  We also need the actual GPIO specifier so
+		 * that we can get the current state of the GPIO.
+		 */
+		dp->irq = gpiod_to_irq(dp->hpd_gpiod);
+		irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
+	} else {
+		dp->irq = platform_get_irq(pdev, 0);
+		irq_flags = 0;
+	}
+
+	if (dp->irq == -ENXIO) {
+		dev_err(&pdev->dev, "failed to get irq\n");
+		ret = -ENODEV;
+		goto err_disable_clk;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, dp->irq,
+					analogix_dp_hardirq,
+					analogix_dp_irq_thread,
+					irq_flags, "analogix-dp", dp);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to request irq\n");
+		goto err_disable_clk;
+	}
+	disable_irq(dp->irq);
+
+	return dp;
+
+err_disable_clk:
+	clk_disable_unprepare(dp->clock);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_probe);
+
+int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
+{
+	int ret;
+
+	dp->drm_dev = drm_dev;
+	dp->encoder = dp->plat_data->encoder;
+
+	dp->aux.name = "DP-AUX";
+	dp->aux.transfer = analogix_dpaux_transfer;
+	dp->aux.dev = dp->dev;
+	dp->aux.drm_dev = drm_dev;
+
+	ret = drm_dp_aux_register(&dp->aux);
+	if (ret)
+		return ret;
+
+	pm_runtime_use_autosuspend(dp->dev);
+	pm_runtime_set_autosuspend_delay(dp->dev, 100);
+	pm_runtime_enable(dp->dev);
+
+	ret = analogix_dp_create_bridge(drm_dev, dp);
+	if (ret) {
+		DRM_ERROR("failed to create bridge (%d)\n", ret);
+		goto err_disable_pm_runtime;
+	}
+
+	return 0;
+
+err_disable_pm_runtime:
+	pm_runtime_dont_use_autosuspend(dp->dev);
+	pm_runtime_disable(dp->dev);
+	drm_dp_aux_unregister(&dp->aux);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_bind);
+
+void analogix_dp_unbind(struct analogix_dp_device *dp)
+{
+	analogix_dp_bridge_disable(dp->bridge);
+	dp->connector.funcs->destroy(&dp->connector);
+
+	if (dp->plat_data->panel) {
+		if (drm_panel_unprepare(dp->plat_data->panel))
+			DRM_ERROR("failed to turnoff the panel\n");
+	}
+
+	drm_dp_aux_unregister(&dp->aux);
+	pm_runtime_dont_use_autosuspend(dp->dev);
+	pm_runtime_disable(dp->dev);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_unbind);
+
+void analogix_dp_remove(struct analogix_dp_device *dp)
+{
+	clk_disable_unprepare(dp->clock);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_remove);
+
+#ifdef CONFIG_PM
+int analogix_dp_suspend(struct analogix_dp_device *dp)
+{
+	clk_disable_unprepare(dp->clock);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_suspend);
+
+int analogix_dp_resume(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	ret = clk_prepare_enable(dp->clock);
+	if (ret < 0) {
+		DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_resume);
+#endif
+
+int analogix_dp_start_crc(struct drm_connector *connector)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+
+	if (!connector->state->crtc) {
+		DRM_ERROR("Connector %s doesn't currently have a CRTC.\n",
+			  connector->name);
+		return -EINVAL;
+	}
+
+	return drm_dp_start_crc(&dp->aux, connector->state->crtc);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_start_crc);
+
+int analogix_dp_stop_crc(struct drm_connector *connector)
+{
+	struct analogix_dp_device *dp = to_dp(connector);
+
+	return drm_dp_stop_crc(&dp->aux);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_stop_crc);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Analogix DP Core Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
new file mode 100644
index 000000000..433f2d7ef
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -0,0 +1,259 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Header file for Analogix DP (Display Port) core interface driver.
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#ifndef _ANALOGIX_DP_CORE_H
+#define _ANALOGIX_DP_CORE_H
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_crtc.h>
+
+#define DP_TIMEOUT_LOOP_COUNT 100
+#define MAX_CR_LOOP 5
+#define MAX_EQ_LOOP 5
+#define MAX_PLL_LOCK_LOOP 5
+
+/* Training takes 22ms if AUX channel comm fails. Use this as retry interval */
+#define DP_TIMEOUT_TRAINING_US			22000
+#define DP_TIMEOUT_PSR_LOOP_MS			300
+
+/* DP_MAX_LANE_COUNT */
+#define DPCD_ENHANCED_FRAME_CAP(x)		(((x) >> 7) & 0x1)
+#define DPCD_MAX_LANE_COUNT(x)			((x) & 0x1f)
+
+/* DP_LANE_COUNT_SET */
+#define DPCD_LANE_COUNT_SET(x)			((x) & 0x1f)
+
+/* DP_TRAINING_LANE0_SET */
+#define DPCD_PRE_EMPHASIS_SET(x)		(((x) & 0x3) << 3)
+#define DPCD_PRE_EMPHASIS_GET(x)		(((x) >> 3) & 0x3)
+#define DPCD_VOLTAGE_SWING_SET(x)		(((x) & 0x3) << 0)
+#define DPCD_VOLTAGE_SWING_GET(x)		(((x) >> 0) & 0x3)
+
+struct gpio_desc;
+
+enum link_lane_count_type {
+	LANE_COUNT1 = 1,
+	LANE_COUNT2 = 2,
+	LANE_COUNT4 = 4
+};
+
+enum link_training_state {
+	START,
+	CLOCK_RECOVERY,
+	EQUALIZER_TRAINING,
+	FINISHED,
+	FAILED
+};
+
+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,
+	D10_2,
+	TRAINING_PTN1,
+	TRAINING_PTN2,
+	DP_NONE
+};
+
+enum color_space {
+	COLOR_RGB,
+	COLOR_YCBCR422,
+	COLOR_YCBCR444
+};
+
+enum color_depth {
+	COLOR_6,
+	COLOR_8,
+	COLOR_10,
+	COLOR_12
+};
+
+enum color_coefficient {
+	COLOR_YCBCR601,
+	COLOR_YCBCR709
+};
+
+enum dynamic_range {
+	VESA,
+	CEA
+};
+
+enum pll_status {
+	PLL_UNLOCKED,
+	PLL_LOCKED
+};
+
+enum clock_recovery_m_value_type {
+	CALCULATED_M,
+	REGISTER_M
+};
+
+enum video_timing_recognition_type {
+	VIDEO_TIMING_FROM_CAPTURE,
+	VIDEO_TIMING_FROM_REGISTER
+};
+
+enum analog_power_block {
+	AUX_BLOCK,
+	CH0_BLOCK,
+	CH1_BLOCK,
+	CH2_BLOCK,
+	CH3_BLOCK,
+	ANALOG_TOTAL,
+	POWER_ALL
+};
+
+enum dp_irq_type {
+	DP_IRQ_TYPE_HP_CABLE_IN  = BIT(0),
+	DP_IRQ_TYPE_HP_CABLE_OUT = BIT(1),
+	DP_IRQ_TYPE_HP_CHANGE    = BIT(2),
+	DP_IRQ_TYPE_UNKNOWN      = BIT(3),
+};
+
+struct video_info {
+	char *name;
+
+	bool h_sync_polarity;
+	bool v_sync_polarity;
+	bool interlaced;
+
+	enum color_space color_space;
+	enum dynamic_range dynamic_range;
+	enum color_coefficient ycbcr_coeff;
+	enum color_depth color_depth;
+
+	int max_link_rate;
+	enum link_lane_count_type max_lane_count;
+};
+
+struct link_train {
+	int eq_loop;
+	int cr_loop[4];
+
+	u8 link_rate;
+	u8 lane_count;
+	u8 training_lane[4];
+
+	enum link_training_state lt_state;
+};
+
+struct analogix_dp_device {
+	struct drm_encoder	*encoder;
+	struct device		*dev;
+	struct drm_device	*drm_dev;
+	struct drm_connector	connector;
+	struct drm_bridge	*bridge;
+	struct drm_dp_aux       aux;
+	struct clk		*clock;
+	unsigned int		irq;
+	void __iomem		*reg_base;
+
+	struct video_info	video_info;
+	struct link_train	link_train;
+	struct phy		*phy;
+	int			dpms_mode;
+	struct gpio_desc	*hpd_gpiod;
+	bool                    force_hpd;
+	bool			fast_train_enable;
+	bool			psr_supported;
+
+	struct mutex		panel_lock;
+	bool			panel_is_modeset;
+
+	struct analogix_dp_plat_data *plat_data;
+};
+
+/* analogix_dp_reg.c */
+void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_stop_video(struct analogix_dp_device *dp);
+void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_init_analog_param(struct analogix_dp_device *dp);
+void analogix_dp_init_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_reset(struct analogix_dp_device *dp);
+void analogix_dp_swreset(struct analogix_dp_device *dp);
+void analogix_dp_config_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp);
+enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp);
+void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
+				       enum analog_power_block block,
+				       bool enable);
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp);
+void analogix_dp_init_hpd(struct analogix_dp_device *dp);
+void analogix_dp_force_hpd(struct analogix_dp_device *dp);
+enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp);
+void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp);
+void analogix_dp_reset_aux(struct analogix_dp_device *dp);
+void analogix_dp_init_aux(struct analogix_dp_device *dp);
+int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp);
+void analogix_dp_enable_sw_function(struct analogix_dp_device *dp);
+void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype);
+void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype);
+void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count);
+void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count);
+void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp,
+				      bool enable);
+void analogix_dp_set_training_pattern(struct analogix_dp_device *dp,
+				      enum pattern_set pattern);
+void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level);
+void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level);
+void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level);
+void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level);
+void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane);
+void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane);
+void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane);
+void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane);
+u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp);
+void analogix_dp_reset_macro(struct analogix_dp_device *dp);
+void analogix_dp_init_video(struct analogix_dp_device *dp);
+
+void analogix_dp_set_video_color_format(struct analogix_dp_device *dp);
+int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp);
+void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp,
+				 enum clock_recovery_m_value_type type,
+				 u32 m_value,
+				 u32 n_value);
+void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type);
+void analogix_dp_enable_video_master(struct analogix_dp_device *dp,
+				     bool enable);
+void analogix_dp_start_video(struct analogix_dp_device *dp);
+int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp);
+void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp);
+void analogix_dp_enable_scrambling(struct analogix_dp_device *dp);
+void analogix_dp_disable_scrambling(struct analogix_dp_device *dp);
+void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp);
+int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
+			     struct dp_sdp *vsc, bool blocking);
+ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
+			     struct drm_dp_aux_msg *msg);
+
+#endif /* _ANALOGIX_DP_CORE_H */
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
new file mode 100644
index 000000000..6a4f20fcc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -0,0 +1,1154 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Analogix DP (Display port) core register interface driver.
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+
+#include <drm/bridge/analogix_dp.h>
+
+#include "analogix_dp_core.h"
+#include "analogix_dp_reg.h"
+
+#define COMMON_INT_MASK_1	0
+#define COMMON_INT_MASK_2	0
+#define COMMON_INT_MASK_3	0
+#define COMMON_INT_MASK_4	(HOTPLUG_CHG | HPD_LOST | PLUG)
+#define INT_STA_MASK		INT_HPD
+
+void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable)
+{
+	u32 reg;
+
+	if (enable) {
+		reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+		reg |= HDCP_VIDEO_MUTE;
+		writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+	} else {
+		reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+		reg &= ~HDCP_VIDEO_MUTE;
+		writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+	}
+}
+
+void analogix_dp_stop_video(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+	reg &= ~VIDEO_EN;
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+}
+
+void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable)
+{
+	u32 reg;
+
+	if (enable)
+		reg = LANE3_MAP_LOGIC_LANE_0 | LANE2_MAP_LOGIC_LANE_1 |
+		      LANE1_MAP_LOGIC_LANE_2 | LANE0_MAP_LOGIC_LANE_3;
+	else
+		reg = LANE3_MAP_LOGIC_LANE_3 | LANE2_MAP_LOGIC_LANE_2 |
+		      LANE1_MAP_LOGIC_LANE_1 | LANE0_MAP_LOGIC_LANE_0;
+
+	writel(reg, dp->reg_base + ANALOGIX_DP_LANE_MAP);
+}
+
+void analogix_dp_init_analog_param(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = TX_TERMINAL_CTRL_50_OHM;
+	writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_1);
+
+	reg = SEL_24M | TX_DVDD_BIT_1_0625V;
+	writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_2);
+
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+		reg = REF_CLK_24M;
+		if (dp->plat_data->dev_type == RK3288_DP)
+			reg ^= REF_CLK_MASK;
+
+		writel(reg, dp->reg_base + ANALOGIX_DP_PLL_REG_1);
+		writel(0x95, dp->reg_base + ANALOGIX_DP_PLL_REG_2);
+		writel(0x40, dp->reg_base + ANALOGIX_DP_PLL_REG_3);
+		writel(0x58, dp->reg_base + ANALOGIX_DP_PLL_REG_4);
+		writel(0x22, dp->reg_base + ANALOGIX_DP_PLL_REG_5);
+	}
+
+	reg = DRIVE_DVDD_BIT_1_0625V | VCO_BIT_600_MICRO;
+	writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_3);
+
+	reg = PD_RING_OSC | AUX_TERMINAL_CTRL_50_OHM |
+		TX_CUR1_2X | TX_CUR_16_MA;
+	writel(reg, dp->reg_base + ANALOGIX_DP_PLL_FILTER_CTL_1);
+
+	reg = CH3_AMP_400_MV | CH2_AMP_400_MV |
+		CH1_AMP_400_MV | CH0_AMP_400_MV;
+	writel(reg, dp->reg_base + ANALOGIX_DP_TX_AMP_TUNING_CTL);
+}
+
+void analogix_dp_init_interrupt(struct analogix_dp_device *dp)
+{
+	/* Set interrupt pin assertion polarity as high */
+	writel(INT_POL1 | INT_POL0, dp->reg_base + ANALOGIX_DP_INT_CTL);
+
+	/* Clear pending regisers */
+	writel(0xff, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+	writel(0x4f, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_2);
+	writel(0xe0, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_3);
+	writel(0xe7, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+	writel(0x63, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+	/* 0:mask,1: unmask */
+	writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
+	writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
+	writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
+	writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+	writel(0x00, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_reset(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	analogix_dp_stop_video(dp);
+	analogix_dp_enable_video_mute(dp, 0);
+
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+		reg = RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N |
+			SW_FUNC_EN_N;
+	else
+		reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
+			AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
+			HDCP_FUNC_EN_N | SW_FUNC_EN_N;
+
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+
+	reg = SSC_FUNC_EN_N | AUX_FUNC_EN_N |
+		SERDES_FIFO_FUNC_EN_N |
+		LS_CLK_DOMAIN_FUNC_EN_N;
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+
+	usleep_range(20, 30);
+
+	analogix_dp_lane_swap(dp, 0);
+
+	writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+	writel(0x40, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+	writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+	writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+
+	writel(0x0, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+	writel(0x0, dp->reg_base + ANALOGIX_DP_HDCP_CTL);
+
+	writel(0x5e, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_L);
+	writel(0x1a, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_H);
+
+	writel(0x10, dp->reg_base + ANALOGIX_DP_LINK_DEBUG_CTL);
+
+	writel(0x0, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+
+	writel(0x0, dp->reg_base + ANALOGIX_DP_VIDEO_FIFO_THRD);
+	writel(0x20, dp->reg_base + ANALOGIX_DP_AUDIO_MARGIN);
+
+	writel(0x4, dp->reg_base + ANALOGIX_DP_M_VID_GEN_FILTER_TH);
+	writel(0x2, dp->reg_base + ANALOGIX_DP_M_AUD_GEN_FILTER_TH);
+
+	writel(0x00000101, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+}
+
+void analogix_dp_swreset(struct analogix_dp_device *dp)
+{
+	writel(RESET_DP_TX, dp->reg_base + ANALOGIX_DP_TX_SW_RESET);
+}
+
+void analogix_dp_config_interrupt(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* 0: mask, 1: unmask */
+	reg = COMMON_INT_MASK_1;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
+
+	reg = COMMON_INT_MASK_2;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
+
+	reg = COMMON_INT_MASK_3;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
+
+	reg = COMMON_INT_MASK_4;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+	reg = INT_STA_MASK;
+	writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* 0: mask, 1: unmask */
+	reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+	reg &= ~COMMON_INT_MASK_4;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+	reg &= ~INT_STA_MASK;
+	writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* 0: mask, 1: unmask */
+	reg = COMMON_INT_MASK_4;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+	reg = INT_STA_MASK;
+	writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+	if (reg & PLL_LOCK)
+		return PLL_LOCKED;
+	else
+		return PLL_UNLOCKED;
+}
+
+void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable)
+{
+	u32 reg;
+	u32 mask = DP_PLL_PD;
+	u32 pd_addr = ANALOGIX_DP_PLL_CTL;
+
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+		pd_addr = ANALOGIX_DP_PD;
+		mask = RK_PLL_PD;
+	}
+
+	reg = readl(dp->reg_base + pd_addr);
+	if (enable)
+		reg |= mask;
+	else
+		reg &= ~mask;
+	writel(reg, dp->reg_base + pd_addr);
+}
+
+void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
+				       enum analog_power_block block,
+				       bool enable)
+{
+	u32 reg;
+	u32 phy_pd_addr = ANALOGIX_DP_PHY_PD;
+	u32 mask;
+
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+		phy_pd_addr = ANALOGIX_DP_PD;
+
+	switch (block) {
+	case AUX_BLOCK:
+		if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+			mask = RK_AUX_PD;
+		else
+			mask = AUX_PD;
+
+		reg = readl(dp->reg_base + phy_pd_addr);
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+		writel(reg, dp->reg_base + phy_pd_addr);
+		break;
+	case CH0_BLOCK:
+		mask = CH0_PD;
+		reg = readl(dp->reg_base + phy_pd_addr);
+
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+		writel(reg, dp->reg_base + phy_pd_addr);
+		break;
+	case CH1_BLOCK:
+		mask = CH1_PD;
+		reg = readl(dp->reg_base + phy_pd_addr);
+
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+		writel(reg, dp->reg_base + phy_pd_addr);
+		break;
+	case CH2_BLOCK:
+		mask = CH2_PD;
+		reg = readl(dp->reg_base + phy_pd_addr);
+
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+		writel(reg, dp->reg_base + phy_pd_addr);
+		break;
+	case CH3_BLOCK:
+		mask = CH3_PD;
+		reg = readl(dp->reg_base + phy_pd_addr);
+
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+		writel(reg, dp->reg_base + phy_pd_addr);
+		break;
+	case ANALOG_TOTAL:
+		/*
+		 * There is no bit named DP_PHY_PD, so We used DP_INC_BG
+		 * to power off everything instead of DP_PHY_PD in
+		 * Rockchip
+		 */
+		if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+			mask = DP_INC_BG;
+		else
+			mask = DP_PHY_PD;
+
+		reg = readl(dp->reg_base + phy_pd_addr);
+		if (enable)
+			reg |= mask;
+		else
+			reg &= ~mask;
+
+		writel(reg, dp->reg_base + phy_pd_addr);
+		if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+			usleep_range(10, 15);
+		break;
+	case POWER_ALL:
+		if (enable) {
+			reg = DP_ALL_PD;
+			writel(reg, dp->reg_base + phy_pd_addr);
+		} else {
+			reg = DP_ALL_PD;
+			writel(reg, dp->reg_base + phy_pd_addr);
+			usleep_range(10, 15);
+			reg &= ~DP_INC_BG;
+			writel(reg, dp->reg_base + phy_pd_addr);
+			usleep_range(10, 15);
+
+			writel(0x00, dp->reg_base + phy_pd_addr);
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
+{
+	u32 reg;
+	int timeout_loop = 0;
+
+	analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
+
+	reg = PLL_LOCK_CHG;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+	reg &= ~(F_PLL_LOCK | PLL_LOCK_CTRL);
+	writel(reg, dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+
+	/* Power up PLL */
+	if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+		analogix_dp_set_pll_power_down(dp, 0);
+
+		while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+			timeout_loop++;
+			if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
+				dev_err(dp->dev, "failed to get pll lock status\n");
+				return -ETIMEDOUT;
+			}
+			usleep_range(10, 20);
+		}
+	}
+
+	/* Enable Serdes FIFO function and Link symbol clock domain module */
+	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
+		| AUX_FUNC_EN_N);
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	return 0;
+}
+
+void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	if (dp->hpd_gpiod)
+		return;
+
+	reg = HOTPLUG_CHG | HPD_LOST | PLUG;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+
+	reg = INT_HPD;
+	writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
+}
+
+void analogix_dp_init_hpd(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	if (dp->hpd_gpiod)
+		return;
+
+	analogix_dp_clear_hotplug_interrupts(dp);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+	reg &= ~(F_HPD | HPD_CTRL);
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+}
+
+void analogix_dp_force_hpd(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+	reg = (F_HPD | HPD_CTRL);
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+}
+
+enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	if (dp->hpd_gpiod) {
+		reg = gpiod_get_value(dp->hpd_gpiod);
+		if (reg)
+			return DP_IRQ_TYPE_HP_CABLE_IN;
+		else
+			return DP_IRQ_TYPE_HP_CABLE_OUT;
+	} else {
+		/* Parse hotplug interrupt status register */
+		reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+
+		if (reg & PLUG)
+			return DP_IRQ_TYPE_HP_CABLE_IN;
+
+		if (reg & HPD_LOST)
+			return DP_IRQ_TYPE_HP_CABLE_OUT;
+
+		if (reg & HOTPLUG_CHG)
+			return DP_IRQ_TYPE_HP_CHANGE;
+
+		return DP_IRQ_TYPE_UNKNOWN;
+	}
+}
+
+void analogix_dp_reset_aux(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* Disable AUX channel module */
+	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	reg |= AUX_FUNC_EN_N;
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+}
+
+void analogix_dp_init_aux(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* Clear inerrupts related to AUX channel */
+	reg = RPLY_RECEIV | AUX_ERR;
+	writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+	analogix_dp_set_analog_power_down(dp, AUX_BLOCK, true);
+	usleep_range(10, 11);
+	analogix_dp_set_analog_power_down(dp, AUX_BLOCK, false);
+
+	analogix_dp_reset_aux(dp);
+
+	/* AUX_BIT_PERIOD_EXPECTED_DELAY doesn't apply to Rockchip IP */
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+		reg = 0;
+	else
+		reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3);
+
+	/* Disable AUX transaction H/W retry */
+	reg |= AUX_HW_RETRY_COUNT_SEL(0) |
+	       AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
+
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_HW_RETRY_CTL);
+
+	/* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
+	reg = DEFER_CTRL_EN | DEFER_COUNT(1);
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_DEFER_CTL);
+
+	/* Enable AUX channel module */
+	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	reg &= ~AUX_FUNC_EN_N;
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+}
+
+int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	if (dp->hpd_gpiod) {
+		if (gpiod_get_value(dp->hpd_gpiod))
+			return 0;
+	} else {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+		if (reg & HPD_STATUS)
+			return 0;
+	}
+
+	return -EINVAL;
+}
+
+void analogix_dp_enable_sw_function(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+	reg &= ~SW_FUNC_EN_N;
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+}
+
+void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype)
+{
+	u32 reg;
+
+	reg = bwtype;
+	if ((bwtype == DP_LINK_BW_2_7) || (bwtype == DP_LINK_BW_1_62))
+		writel(reg, dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
+}
+
+void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
+	*bwtype = reg;
+}
+
+void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count)
+{
+	u32 reg;
+
+	reg = count;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
+}
+
+void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
+	*count = reg;
+}
+
+void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp,
+				      bool enable)
+{
+	u32 reg;
+
+	if (enable) {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+		reg |= ENHANCED;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+	} else {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+		reg &= ~ENHANCED;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+	}
+}
+
+void analogix_dp_set_training_pattern(struct analogix_dp_device *dp,
+				      enum pattern_set pattern)
+{
+	u32 reg;
+
+	switch (pattern) {
+	case PRBS7:
+		reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_PRBS7;
+		writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+		break;
+	case D10_2:
+		reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_D10_2;
+		writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+		break;
+	case TRAINING_PTN1:
+		reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN1;
+		writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+		break;
+	case TRAINING_PTN2:
+		reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN2;
+		writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+		break;
+	case DP_NONE:
+		reg = SCRAMBLING_ENABLE |
+			LINK_QUAL_PATTERN_SET_DISABLE |
+			SW_TRAINING_PATTERN_SET_NORMAL;
+		writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+		break;
+	default:
+		break;
+	}
+}
+
+void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+	reg &= ~PRE_EMPHASIS_SET_MASK;
+	reg |= level << PRE_EMPHASIS_SET_SHIFT;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+	reg &= ~PRE_EMPHASIS_SET_MASK;
+	reg |= level << PRE_EMPHASIS_SET_SHIFT;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+	reg &= ~PRE_EMPHASIS_SET_MASK;
+	reg |= level << PRE_EMPHASIS_SET_SHIFT;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp,
+					u32 level)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+	reg &= ~PRE_EMPHASIS_SET_MASK;
+	reg |= level << PRE_EMPHASIS_SET_SHIFT;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane)
+{
+	u32 reg;
+
+	reg = training_lane;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane)
+{
+	u32 reg;
+
+	reg = training_lane;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane)
+{
+	u32 reg;
+
+	reg = training_lane;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp,
+					 u32 training_lane)
+{
+	u32 reg;
+
+	reg = training_lane;
+	writel(reg, dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp)
+{
+	return readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp)
+{
+	return readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp)
+{
+	return readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp)
+{
+	return readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_reset_macro(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_PHY_TEST);
+	reg |= MACRO_RST;
+	writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+
+	/* 10 us is the minimum reset time. */
+	usleep_range(10, 20);
+
+	reg &= ~MACRO_RST;
+	writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+}
+
+void analogix_dp_init_video(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
+	writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+
+	reg = 0x0;
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+	reg = CHA_CRI(4) | CHA_CTRL;
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+
+	reg = 0x0;
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+
+	reg = VID_HRES_TH(2) | VID_VRES_TH(0);
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_8);
+}
+
+void analogix_dp_set_video_color_format(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	/* Configure the input color depth, color space, dynamic range */
+	reg = (dp->video_info.dynamic_range << IN_D_RANGE_SHIFT) |
+		(dp->video_info.color_depth << IN_BPC_SHIFT) |
+		(dp->video_info.color_space << IN_COLOR_F_SHIFT);
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_2);
+
+	/* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+	reg &= ~IN_YC_COEFFI_MASK;
+	if (dp->video_info.ycbcr_coeff)
+		reg |= IN_YC_COEFFI_ITU709;
+	else
+		reg |= IN_YC_COEFFI_ITU601;
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+}
+
+int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+	if (!(reg & DET_STA)) {
+		dev_dbg(dp->dev, "Input stream clock not detected.\n");
+		return -EINVAL;
+	}
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+	dev_dbg(dp->dev, "wait SYS_CTL_2.\n");
+
+	if (reg & CHA_STA) {
+		dev_dbg(dp->dev, "Input stream clk is changing\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp,
+				 enum clock_recovery_m_value_type type,
+				 u32 m_value, u32 n_value)
+{
+	u32 reg;
+
+	if (type == REGISTER_M) {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+		reg |= FIX_M_VID;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+		reg = m_value & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_0);
+		reg = (m_value >> 8) & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_1);
+		reg = (m_value >> 16) & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_2);
+
+		reg = n_value & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_0);
+		reg = (n_value >> 8) & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_1);
+		reg = (n_value >> 16) & 0xff;
+		writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_2);
+	} else  {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+		reg &= ~FIX_M_VID;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+
+		writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_0);
+		writel(0x80, dp->reg_base + ANALOGIX_DP_N_VID_1);
+		writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_2);
+	}
+}
+
+void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type)
+{
+	u32 reg;
+
+	if (type == VIDEO_TIMING_FROM_CAPTURE) {
+		reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+		reg &= ~FORMAT_SEL;
+		writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+	} else {
+		reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+		reg |= FORMAT_SEL;
+		writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+	}
+}
+
+void analogix_dp_enable_video_master(struct analogix_dp_device *dp, bool enable)
+{
+	u32 reg;
+
+	if (enable) {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+		reg &= ~VIDEO_MODE_MASK;
+		reg |= VIDEO_MASTER_MODE_EN | VIDEO_MODE_MASTER_MODE;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+	} else {
+		reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+		reg &= ~VIDEO_MODE_MASK;
+		reg |= VIDEO_MODE_SLAVE_MODE;
+		writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+	}
+}
+
+void analogix_dp_start_video(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+	reg |= VIDEO_EN;
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+}
+
+int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+	writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+	if (!(reg & STRM_VALID)) {
+		dev_dbg(dp->dev, "Input video stream is not detected.\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+		reg &= ~(RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N);
+	} else {
+		reg &= ~(MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N);
+		reg |= MASTER_VID_FUNC_EN_N;
+	}
+	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+	reg &= ~INTERACE_SCAN_CFG;
+	reg |= (dp->video_info.interlaced << 2);
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+	reg &= ~VSYNC_POLARITY_CFG;
+	reg |= (dp->video_info.v_sync_polarity << 1);
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+	reg &= ~HSYNC_POLARITY_CFG;
+	reg |= (dp->video_info.h_sync_polarity << 0);
+	writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+	reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
+	writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+}
+
+void analogix_dp_enable_scrambling(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+	reg &= ~SCRAMBLING_DISABLE;
+	writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+}
+
+void analogix_dp_disable_scrambling(struct analogix_dp_device *dp)
+{
+	u32 reg;
+
+	reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+	reg |= SCRAMBLING_DISABLE;
+	writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+}
+
+void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp)
+{
+	writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON);
+}
+
+static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
+{
+	ssize_t val;
+	u8 status;
+
+	val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &status);
+	if (val < 0) {
+		dev_err(dp->dev, "PSR_STATUS read failed ret=%zd", val);
+		return val;
+	}
+	return status;
+}
+
+int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
+			     struct dp_sdp *vsc, bool blocking)
+{
+	unsigned int val;
+	int ret;
+	ssize_t psr_status;
+
+	/* don't send info frame */
+	val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+	val &= ~IF_EN;
+	writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+	/* configure single frame update mode */
+	writel(PSR_FRAME_UP_TYPE_BURST | PSR_CRC_SEL_HARDWARE,
+	       dp->reg_base + ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL);
+
+	/* configure VSC HB0~HB3 */
+	writel(vsc->sdp_header.HB0, dp->reg_base + ANALOGIX_DP_SPD_HB0);
+	writel(vsc->sdp_header.HB1, dp->reg_base + ANALOGIX_DP_SPD_HB1);
+	writel(vsc->sdp_header.HB2, dp->reg_base + ANALOGIX_DP_SPD_HB2);
+	writel(vsc->sdp_header.HB3, dp->reg_base + ANALOGIX_DP_SPD_HB3);
+
+	/* configure reused VSC PB0~PB3, magic number from vendor */
+	writel(0x00, dp->reg_base + ANALOGIX_DP_SPD_PB0);
+	writel(0x16, dp->reg_base + ANALOGIX_DP_SPD_PB1);
+	writel(0xCE, dp->reg_base + ANALOGIX_DP_SPD_PB2);
+	writel(0x5D, dp->reg_base + ANALOGIX_DP_SPD_PB3);
+
+	/* configure DB0 / DB1 values */
+	writel(vsc->db[0], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
+	writel(vsc->db[1], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
+
+	/* set reuse spd inforframe */
+	val = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+	val |= REUSE_SPD_EN;
+	writel(val, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+
+	/* mark info frame update */
+	val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+	val = (val | IF_UP) & ~IF_EN;
+	writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+	/* send info frame */
+	val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+	val |= IF_EN;
+	writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+	if (!blocking)
+		return 0;
+
+	/*
+	 * db[1]!=0: entering PSR, wait for fully active remote frame buffer.
+	 * db[1]==0: exiting PSR, wait for either
+	 *  (a) ACTIVE_RESYNC - the sink "must display the
+	 *      incoming active frames from the Source device with no visible
+	 *      glitches and/or artifacts", even though timings may still be
+	 *      re-synchronizing; or
+	 *  (b) INACTIVE - the transition is fully complete.
+	 */
+	ret = readx_poll_timeout(analogix_dp_get_psr_status, dp, psr_status,
+		psr_status >= 0 &&
+		((vsc->db[1] && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
+		(!vsc->db[1] && (psr_status == DP_PSR_SINK_ACTIVE_RESYNC ||
+				 psr_status == DP_PSR_SINK_INACTIVE))),
+		1500, DP_TIMEOUT_PSR_LOOP_MS * 1000);
+	if (ret) {
+		dev_warn(dp->dev, "Failed to apply PSR %d\n", ret);
+		return ret;
+	}
+	return 0;
+}
+
+ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
+			     struct drm_dp_aux_msg *msg)
+{
+	u32 reg;
+	u32 status_reg;
+	u8 *buffer = msg->buffer;
+	unsigned int i;
+	int num_transferred = 0;
+	int ret;
+
+	/* Buffer size of AUX CH is 16 bytes */
+	if (WARN_ON(msg->size > 16))
+		return -E2BIG;
+
+	/* Clear AUX CH data buffer */
+	reg = BUF_CLR;
+	writel(reg, dp->reg_base + ANALOGIX_DP_BUFFER_DATA_CTL);
+
+	switch (msg->request & ~DP_AUX_I2C_MOT) {
+	case DP_AUX_I2C_WRITE:
+		reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_I2C_TRANSACTION;
+		if (msg->request & DP_AUX_I2C_MOT)
+			reg |= AUX_TX_COMM_MOT;
+		break;
+
+	case DP_AUX_I2C_READ:
+		reg = AUX_TX_COMM_READ | AUX_TX_COMM_I2C_TRANSACTION;
+		if (msg->request & DP_AUX_I2C_MOT)
+			reg |= AUX_TX_COMM_MOT;
+		break;
+
+	case DP_AUX_NATIVE_WRITE:
+		reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_DP_TRANSACTION;
+		break;
+
+	case DP_AUX_NATIVE_READ:
+		reg = AUX_TX_COMM_READ | AUX_TX_COMM_DP_TRANSACTION;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	reg |= AUX_LENGTH(msg->size);
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_1);
+
+	/* Select DPCD device address */
+	reg = AUX_ADDR_7_0(msg->address);
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_7_0);
+	reg = AUX_ADDR_15_8(msg->address);
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_15_8);
+	reg = AUX_ADDR_19_16(msg->address);
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_19_16);
+
+	if (!(msg->request & DP_AUX_I2C_READ)) {
+		for (i = 0; i < msg->size; i++) {
+			reg = buffer[i];
+			writel(reg, dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+			       4 * i);
+			num_transferred++;
+		}
+	}
+
+	/* Enable AUX CH operation */
+	reg = AUX_EN;
+
+	/* Zero-sized messages specify address-only transactions. */
+	if (msg->size < 1)
+		reg |= ADDR_ONLY;
+
+	writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
+
+	ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2,
+				 reg, !(reg & AUX_EN), 25, 500 * 1000);
+	if (ret) {
+		dev_err(dp->dev, "AUX CH enable timeout!\n");
+		goto aux_error;
+	}
+
+	/* TODO: Wait for an interrupt instead of looping? */
+	/* Is AUX CH command reply received? */
+	ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_INT_STA,
+				 reg, reg & RPLY_RECEIV, 10, 20 * 1000);
+	if (ret) {
+		dev_err(dp->dev, "AUX CH cmd reply timeout!\n");
+		goto aux_error;
+	}
+
+	/* Clear interrupt source for AUX CH command reply */
+	writel(RPLY_RECEIV, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+	/* Clear interrupt source for AUX CH access error */
+	reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
+	status_reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA);
+	if ((reg & AUX_ERR) || (status_reg & AUX_STATUS_MASK)) {
+		writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+		dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n",
+			 status_reg & AUX_STATUS_MASK, !!(reg & AUX_ERR));
+		goto aux_error;
+	}
+
+	if (msg->request & DP_AUX_I2C_READ) {
+		for (i = 0; i < msg->size; i++) {
+			reg = readl(dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+				    4 * i);
+			buffer[i] = (unsigned char)reg;
+			num_transferred++;
+		}
+	}
+
+	/* Check if Rx sends defer */
+	reg = readl(dp->reg_base + ANALOGIX_DP_AUX_RX_COMM);
+	if (reg == AUX_RX_COMM_AUX_DEFER)
+		msg->reply = DP_AUX_NATIVE_REPLY_DEFER;
+	else if (reg == AUX_RX_COMM_I2C_DEFER)
+		msg->reply = DP_AUX_I2C_REPLY_DEFER;
+	else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_WRITE ||
+		 (msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_READ)
+		msg->reply = DP_AUX_I2C_REPLY_ACK;
+	else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_WRITE ||
+		 (msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_READ)
+		msg->reply = DP_AUX_NATIVE_REPLY_ACK;
+
+	return num_transferred > 0 ? num_transferred : -EBUSY;
+
+aux_error:
+	/* if aux err happen, reset aux */
+	analogix_dp_init_aux(dp);
+
+	return -EREMOTEIO;
+}
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
new file mode 100644
index 000000000..e284ee8da
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
@@ -0,0 +1,417 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Register definition file for Analogix DP core driver
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#ifndef _ANALOGIX_DP_REG_H
+#define _ANALOGIX_DP_REG_H
+
+#define ANALOGIX_DP_TX_SW_RESET			0x14
+#define ANALOGIX_DP_FUNC_EN_1			0x18
+#define ANALOGIX_DP_FUNC_EN_2			0x1C
+#define ANALOGIX_DP_VIDEO_CTL_1			0x20
+#define ANALOGIX_DP_VIDEO_CTL_2			0x24
+#define ANALOGIX_DP_VIDEO_CTL_3			0x28
+
+#define ANALOGIX_DP_VIDEO_CTL_8			0x3C
+#define ANALOGIX_DP_VIDEO_CTL_10		0x44
+
+#define ANALOGIX_DP_SPDIF_AUDIO_CTL_0		0xD8
+
+#define ANALOGIX_DP_PLL_REG_1			0xfc
+#define ANALOGIX_DP_PLL_REG_2			0x9e4
+#define ANALOGIX_DP_PLL_REG_3			0x9e8
+#define ANALOGIX_DP_PLL_REG_4			0x9ec
+#define ANALOGIX_DP_PLL_REG_5			0xa00
+
+#define ANALOGIX_DP_PD				0x12c
+
+#define ANALOGIX_DP_IF_TYPE			0x244
+#define ANALOGIX_DP_IF_PKT_DB1			0x254
+#define ANALOGIX_DP_IF_PKT_DB2			0x258
+#define ANALOGIX_DP_SPD_HB0			0x2F8
+#define ANALOGIX_DP_SPD_HB1			0x2FC
+#define ANALOGIX_DP_SPD_HB2			0x300
+#define ANALOGIX_DP_SPD_HB3			0x304
+#define ANALOGIX_DP_SPD_PB0			0x308
+#define ANALOGIX_DP_SPD_PB1			0x30C
+#define ANALOGIX_DP_SPD_PB2			0x310
+#define ANALOGIX_DP_SPD_PB3			0x314
+#define ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL	0x318
+#define ANALOGIX_DP_VSC_SHADOW_DB0		0x31C
+#define ANALOGIX_DP_VSC_SHADOW_DB1		0x320
+
+#define ANALOGIX_DP_LANE_MAP			0x35C
+
+#define ANALOGIX_DP_ANALOG_CTL_1		0x370
+#define ANALOGIX_DP_ANALOG_CTL_2		0x374
+#define ANALOGIX_DP_ANALOG_CTL_3		0x378
+#define ANALOGIX_DP_PLL_FILTER_CTL_1		0x37C
+#define ANALOGIX_DP_TX_AMP_TUNING_CTL		0x380
+
+#define ANALOGIX_DP_AUX_HW_RETRY_CTL		0x390
+
+#define ANALOGIX_DP_COMMON_INT_STA_1		0x3C4
+#define ANALOGIX_DP_COMMON_INT_STA_2		0x3C8
+#define ANALOGIX_DP_COMMON_INT_STA_3		0x3CC
+#define ANALOGIX_DP_COMMON_INT_STA_4		0x3D0
+#define ANALOGIX_DP_INT_STA			0x3DC
+#define ANALOGIX_DP_COMMON_INT_MASK_1		0x3E0
+#define ANALOGIX_DP_COMMON_INT_MASK_2		0x3E4
+#define ANALOGIX_DP_COMMON_INT_MASK_3		0x3E8
+#define ANALOGIX_DP_COMMON_INT_MASK_4		0x3EC
+#define ANALOGIX_DP_INT_STA_MASK		0x3F8
+#define ANALOGIX_DP_INT_CTL			0x3FC
+
+#define ANALOGIX_DP_SYS_CTL_1			0x600
+#define ANALOGIX_DP_SYS_CTL_2			0x604
+#define ANALOGIX_DP_SYS_CTL_3			0x608
+#define ANALOGIX_DP_SYS_CTL_4			0x60C
+
+#define ANALOGIX_DP_PKT_SEND_CTL		0x640
+#define ANALOGIX_DP_HDCP_CTL			0x648
+
+#define ANALOGIX_DP_LINK_BW_SET			0x680
+#define ANALOGIX_DP_LANE_COUNT_SET		0x684
+#define ANALOGIX_DP_TRAINING_PTN_SET		0x688
+#define ANALOGIX_DP_LN0_LINK_TRAINING_CTL	0x68C
+#define ANALOGIX_DP_LN1_LINK_TRAINING_CTL	0x690
+#define ANALOGIX_DP_LN2_LINK_TRAINING_CTL	0x694
+#define ANALOGIX_DP_LN3_LINK_TRAINING_CTL	0x698
+
+#define ANALOGIX_DP_DEBUG_CTL			0x6C0
+#define ANALOGIX_DP_HPD_DEGLITCH_L		0x6C4
+#define ANALOGIX_DP_HPD_DEGLITCH_H		0x6C8
+#define ANALOGIX_DP_LINK_DEBUG_CTL		0x6E0
+
+#define ANALOGIX_DP_M_VID_0			0x700
+#define ANALOGIX_DP_M_VID_1			0x704
+#define ANALOGIX_DP_M_VID_2			0x708
+#define ANALOGIX_DP_N_VID_0			0x70C
+#define ANALOGIX_DP_N_VID_1			0x710
+#define ANALOGIX_DP_N_VID_2			0x714
+
+#define ANALOGIX_DP_PLL_CTL			0x71C
+#define ANALOGIX_DP_PHY_PD			0x720
+#define ANALOGIX_DP_PHY_TEST			0x724
+
+#define ANALOGIX_DP_VIDEO_FIFO_THRD		0x730
+#define ANALOGIX_DP_AUDIO_MARGIN		0x73C
+
+#define ANALOGIX_DP_M_VID_GEN_FILTER_TH		0x764
+#define ANALOGIX_DP_M_AUD_GEN_FILTER_TH		0x778
+#define ANALOGIX_DP_AUX_CH_STA			0x780
+#define ANALOGIX_DP_AUX_CH_DEFER_CTL		0x788
+#define ANALOGIX_DP_AUX_RX_COMM			0x78C
+#define ANALOGIX_DP_BUFFER_DATA_CTL		0x790
+#define ANALOGIX_DP_AUX_CH_CTL_1		0x794
+#define ANALOGIX_DP_AUX_ADDR_7_0		0x798
+#define ANALOGIX_DP_AUX_ADDR_15_8		0x79C
+#define ANALOGIX_DP_AUX_ADDR_19_16		0x7A0
+#define ANALOGIX_DP_AUX_CH_CTL_2		0x7A4
+
+#define ANALOGIX_DP_BUF_DATA_0			0x7C0
+
+#define ANALOGIX_DP_SOC_GENERAL_CTL		0x800
+
+#define ANALOGIX_DP_CRC_CON			0x890
+
+/* ANALOGIX_DP_TX_SW_RESET */
+#define RESET_DP_TX				(0x1 << 0)
+
+/* ANALOGIX_DP_FUNC_EN_1 */
+#define MASTER_VID_FUNC_EN_N			(0x1 << 7)
+#define RK_VID_CAP_FUNC_EN_N			(0x1 << 6)
+#define SLAVE_VID_FUNC_EN_N			(0x1 << 5)
+#define RK_VID_FIFO_FUNC_EN_N			(0x1 << 5)
+#define AUD_FIFO_FUNC_EN_N			(0x1 << 4)
+#define AUD_FUNC_EN_N				(0x1 << 3)
+#define HDCP_FUNC_EN_N				(0x1 << 2)
+#define CRC_FUNC_EN_N				(0x1 << 1)
+#define SW_FUNC_EN_N				(0x1 << 0)
+
+/* ANALOGIX_DP_FUNC_EN_2 */
+#define SSC_FUNC_EN_N				(0x1 << 7)
+#define AUX_FUNC_EN_N				(0x1 << 2)
+#define SERDES_FIFO_FUNC_EN_N			(0x1 << 1)
+#define LS_CLK_DOMAIN_FUNC_EN_N			(0x1 << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_1 */
+#define VIDEO_EN				(0x1 << 7)
+#define HDCP_VIDEO_MUTE				(0x1 << 6)
+
+/* ANALOGIX_DP_VIDEO_CTL_1 */
+#define IN_D_RANGE_MASK				(0x1 << 7)
+#define IN_D_RANGE_SHIFT			(7)
+#define IN_D_RANGE_CEA				(0x1 << 7)
+#define IN_D_RANGE_VESA				(0x0 << 7)
+#define IN_BPC_MASK				(0x7 << 4)
+#define IN_BPC_SHIFT				(4)
+#define IN_BPC_12_BITS				(0x3 << 4)
+#define IN_BPC_10_BITS				(0x2 << 4)
+#define IN_BPC_8_BITS				(0x1 << 4)
+#define IN_BPC_6_BITS				(0x0 << 4)
+#define IN_COLOR_F_MASK				(0x3 << 0)
+#define IN_COLOR_F_SHIFT			(0)
+#define IN_COLOR_F_YCBCR444			(0x2 << 0)
+#define IN_COLOR_F_YCBCR422			(0x1 << 0)
+#define IN_COLOR_F_RGB				(0x0 << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_3 */
+#define IN_YC_COEFFI_MASK			(0x1 << 7)
+#define IN_YC_COEFFI_SHIFT			(7)
+#define IN_YC_COEFFI_ITU709			(0x1 << 7)
+#define IN_YC_COEFFI_ITU601			(0x0 << 7)
+#define VID_CHK_UPDATE_TYPE_MASK		(0x1 << 4)
+#define VID_CHK_UPDATE_TYPE_SHIFT		(4)
+#define VID_CHK_UPDATE_TYPE_1			(0x1 << 4)
+#define VID_CHK_UPDATE_TYPE_0			(0x0 << 4)
+#define REUSE_SPD_EN				(0x1 << 3)
+
+/* ANALOGIX_DP_VIDEO_CTL_8 */
+#define VID_HRES_TH(x)				(((x) & 0xf) << 4)
+#define VID_VRES_TH(x)				(((x) & 0xf) << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_10 */
+#define FORMAT_SEL				(0x1 << 4)
+#define INTERACE_SCAN_CFG			(0x1 << 2)
+#define VSYNC_POLARITY_CFG			(0x1 << 1)
+#define HSYNC_POLARITY_CFG			(0x1 << 0)
+
+/* ANALOGIX_DP_PLL_REG_1 */
+#define REF_CLK_24M				(0x1 << 0)
+#define REF_CLK_27M				(0x0 << 0)
+#define REF_CLK_MASK				(0x1 << 0)
+
+/* ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL */
+#define PSR_FRAME_UP_TYPE_BURST			(0x1 << 0)
+#define PSR_FRAME_UP_TYPE_SINGLE		(0x0 << 0)
+#define PSR_CRC_SEL_HARDWARE			(0x1 << 1)
+#define PSR_CRC_SEL_MANUALLY			(0x0 << 1)
+
+/* ANALOGIX_DP_LANE_MAP */
+#define LANE3_MAP_LOGIC_LANE_0			(0x0 << 6)
+#define LANE3_MAP_LOGIC_LANE_1			(0x1 << 6)
+#define LANE3_MAP_LOGIC_LANE_2			(0x2 << 6)
+#define LANE3_MAP_LOGIC_LANE_3			(0x3 << 6)
+#define LANE2_MAP_LOGIC_LANE_0			(0x0 << 4)
+#define LANE2_MAP_LOGIC_LANE_1			(0x1 << 4)
+#define LANE2_MAP_LOGIC_LANE_2			(0x2 << 4)
+#define LANE2_MAP_LOGIC_LANE_3			(0x3 << 4)
+#define LANE1_MAP_LOGIC_LANE_0			(0x0 << 2)
+#define LANE1_MAP_LOGIC_LANE_1			(0x1 << 2)
+#define LANE1_MAP_LOGIC_LANE_2			(0x2 << 2)
+#define LANE1_MAP_LOGIC_LANE_3			(0x3 << 2)
+#define LANE0_MAP_LOGIC_LANE_0			(0x0 << 0)
+#define LANE0_MAP_LOGIC_LANE_1			(0x1 << 0)
+#define LANE0_MAP_LOGIC_LANE_2			(0x2 << 0)
+#define LANE0_MAP_LOGIC_LANE_3			(0x3 << 0)
+
+/* ANALOGIX_DP_ANALOG_CTL_1 */
+#define TX_TERMINAL_CTRL_50_OHM			(0x1 << 4)
+
+/* ANALOGIX_DP_ANALOG_CTL_2 */
+#define SEL_24M					(0x1 << 3)
+#define TX_DVDD_BIT_1_0625V			(0x4 << 0)
+
+/* ANALOGIX_DP_ANALOG_CTL_3 */
+#define DRIVE_DVDD_BIT_1_0625V			(0x4 << 5)
+#define VCO_BIT_600_MICRO			(0x5 << 0)
+
+/* ANALOGIX_DP_PLL_FILTER_CTL_1 */
+#define PD_RING_OSC				(0x1 << 6)
+#define AUX_TERMINAL_CTRL_50_OHM		(0x2 << 4)
+#define TX_CUR1_2X				(0x1 << 2)
+#define TX_CUR_16_MA				(0x3 << 0)
+
+/* ANALOGIX_DP_TX_AMP_TUNING_CTL */
+#define CH3_AMP_400_MV				(0x0 << 24)
+#define CH2_AMP_400_MV				(0x0 << 16)
+#define CH1_AMP_400_MV				(0x0 << 8)
+#define CH0_AMP_400_MV				(0x0 << 0)
+
+/* ANALOGIX_DP_AUX_HW_RETRY_CTL */
+#define AUX_BIT_PERIOD_EXPECTED_DELAY(x)	(((x) & 0x7) << 8)
+#define AUX_HW_RETRY_INTERVAL_MASK		(0x3 << 3)
+#define AUX_HW_RETRY_INTERVAL_600_MICROSECONDS	(0x0 << 3)
+#define AUX_HW_RETRY_INTERVAL_800_MICROSECONDS	(0x1 << 3)
+#define AUX_HW_RETRY_INTERVAL_1000_MICROSECONDS	(0x2 << 3)
+#define AUX_HW_RETRY_INTERVAL_1800_MICROSECONDS	(0x3 << 3)
+#define AUX_HW_RETRY_COUNT_SEL(x)		(((x) & 0x7) << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_1 */
+#define VSYNC_DET				(0x1 << 7)
+#define PLL_LOCK_CHG				(0x1 << 6)
+#define SPDIF_ERR				(0x1 << 5)
+#define SPDIF_UNSTBL				(0x1 << 4)
+#define VID_FORMAT_CHG				(0x1 << 3)
+#define AUD_CLK_CHG				(0x1 << 2)
+#define VID_CLK_CHG				(0x1 << 1)
+#define SW_INT					(0x1 << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_2 */
+#define ENC_EN_CHG				(0x1 << 6)
+#define HW_BKSV_RDY				(0x1 << 3)
+#define HW_SHA_DONE				(0x1 << 2)
+#define HW_AUTH_STATE_CHG			(0x1 << 1)
+#define HW_AUTH_DONE				(0x1 << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_3 */
+#define AFIFO_UNDER				(0x1 << 7)
+#define AFIFO_OVER				(0x1 << 6)
+#define R0_CHK_FLAG				(0x1 << 5)
+
+/* ANALOGIX_DP_COMMON_INT_STA_4 */
+#define PSR_ACTIVE				(0x1 << 7)
+#define PSR_INACTIVE				(0x1 << 6)
+#define SPDIF_BI_PHASE_ERR			(0x1 << 5)
+#define HOTPLUG_CHG				(0x1 << 2)
+#define HPD_LOST				(0x1 << 1)
+#define PLUG					(0x1 << 0)
+
+/* ANALOGIX_DP_INT_STA */
+#define INT_HPD					(0x1 << 6)
+#define HW_TRAINING_FINISH			(0x1 << 5)
+#define RPLY_RECEIV				(0x1 << 1)
+#define AUX_ERR					(0x1 << 0)
+
+/* ANALOGIX_DP_INT_CTL */
+#define SOFT_INT_CTRL				(0x1 << 2)
+#define INT_POL1				(0x1 << 1)
+#define INT_POL0				(0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_1 */
+#define DET_STA					(0x1 << 2)
+#define FORCE_DET				(0x1 << 1)
+#define DET_CTRL				(0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_2 */
+#define CHA_CRI(x)				(((x) & 0xf) << 4)
+#define CHA_STA					(0x1 << 2)
+#define FORCE_CHA				(0x1 << 1)
+#define CHA_CTRL				(0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_3 */
+#define HPD_STATUS				(0x1 << 6)
+#define F_HPD					(0x1 << 5)
+#define HPD_CTRL				(0x1 << 4)
+#define HDCP_RDY				(0x1 << 3)
+#define STRM_VALID				(0x1 << 2)
+#define F_VALID					(0x1 << 1)
+#define VALID_CTRL				(0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_4 */
+#define FIX_M_AUD				(0x1 << 4)
+#define ENHANCED				(0x1 << 3)
+#define FIX_M_VID				(0x1 << 2)
+#define M_VID_UPDATE_CTRL			(0x3 << 0)
+
+/* ANALOGIX_DP_TRAINING_PTN_SET */
+#define SCRAMBLER_TYPE				(0x1 << 9)
+#define HW_LINK_TRAINING_PATTERN		(0x1 << 8)
+#define SCRAMBLING_DISABLE			(0x1 << 5)
+#define SCRAMBLING_ENABLE			(0x0 << 5)
+#define LINK_QUAL_PATTERN_SET_MASK		(0x3 << 2)
+#define LINK_QUAL_PATTERN_SET_PRBS7		(0x3 << 2)
+#define LINK_QUAL_PATTERN_SET_D10_2		(0x1 << 2)
+#define LINK_QUAL_PATTERN_SET_DISABLE		(0x0 << 2)
+#define SW_TRAINING_PATTERN_SET_MASK		(0x3 << 0)
+#define SW_TRAINING_PATTERN_SET_PTN2		(0x2 << 0)
+#define SW_TRAINING_PATTERN_SET_PTN1		(0x1 << 0)
+#define SW_TRAINING_PATTERN_SET_NORMAL		(0x0 << 0)
+
+/* ANALOGIX_DP_LN0_LINK_TRAINING_CTL */
+#define PRE_EMPHASIS_SET_MASK			(0x3 << 3)
+#define PRE_EMPHASIS_SET_SHIFT			(3)
+
+/* ANALOGIX_DP_DEBUG_CTL */
+#define PLL_LOCK				(0x1 << 4)
+#define F_PLL_LOCK				(0x1 << 3)
+#define PLL_LOCK_CTRL				(0x1 << 2)
+#define PN_INV					(0x1 << 0)
+
+/* ANALOGIX_DP_PLL_CTL */
+#define DP_PLL_PD				(0x1 << 7)
+#define DP_PLL_RESET				(0x1 << 6)
+#define DP_PLL_LOOP_BIT_DEFAULT			(0x1 << 4)
+#define DP_PLL_REF_BIT_1_1250V			(0x5 << 0)
+#define DP_PLL_REF_BIT_1_2500V			(0x7 << 0)
+
+/* ANALOGIX_DP_PHY_PD */
+#define DP_INC_BG				(0x1 << 7)
+#define DP_EXP_BG				(0x1 << 6)
+#define DP_PHY_PD				(0x1 << 5)
+#define RK_AUX_PD				(0x1 << 5)
+#define AUX_PD					(0x1 << 4)
+#define RK_PLL_PD				(0x1 << 4)
+#define CH3_PD					(0x1 << 3)
+#define CH2_PD					(0x1 << 2)
+#define CH1_PD					(0x1 << 1)
+#define CH0_PD					(0x1 << 0)
+#define DP_ALL_PD				(0xff)
+
+/* ANALOGIX_DP_PHY_TEST */
+#define MACRO_RST				(0x1 << 5)
+#define CH1_TEST				(0x1 << 1)
+#define CH0_TEST				(0x1 << 0)
+
+/* ANALOGIX_DP_AUX_CH_STA */
+#define AUX_BUSY				(0x1 << 4)
+#define AUX_STATUS_MASK				(0xf << 0)
+
+/* ANALOGIX_DP_AUX_CH_DEFER_CTL */
+#define DEFER_CTRL_EN				(0x1 << 7)
+#define DEFER_COUNT(x)				(((x) & 0x7f) << 0)
+
+/* ANALOGIX_DP_AUX_RX_COMM */
+#define AUX_RX_COMM_I2C_DEFER			(0x2 << 2)
+#define AUX_RX_COMM_AUX_DEFER			(0x2 << 0)
+
+/* ANALOGIX_DP_BUFFER_DATA_CTL */
+#define BUF_CLR					(0x1 << 7)
+#define BUF_DATA_COUNT(x)			(((x) & 0x1f) << 0)
+
+/* ANALOGIX_DP_AUX_CH_CTL_1 */
+#define AUX_LENGTH(x)				(((x - 1) & 0xf) << 4)
+#define AUX_TX_COMM_MASK			(0xf << 0)
+#define AUX_TX_COMM_DP_TRANSACTION		(0x1 << 3)
+#define AUX_TX_COMM_I2C_TRANSACTION		(0x0 << 3)
+#define AUX_TX_COMM_MOT				(0x1 << 2)
+#define AUX_TX_COMM_WRITE			(0x0 << 0)
+#define AUX_TX_COMM_READ			(0x1 << 0)
+
+/* ANALOGIX_DP_AUX_ADDR_7_0 */
+#define AUX_ADDR_7_0(x)				(((x) >> 0) & 0xff)
+
+/* ANALOGIX_DP_AUX_ADDR_15_8 */
+#define AUX_ADDR_15_8(x)			(((x) >> 8) & 0xff)
+
+/* ANALOGIX_DP_AUX_ADDR_19_16 */
+#define AUX_ADDR_19_16(x)			(((x) >> 16) & 0x0f)
+
+/* ANALOGIX_DP_AUX_CH_CTL_2 */
+#define ADDR_ONLY				(0x1 << 1)
+#define AUX_EN					(0x1 << 0)
+
+/* ANALOGIX_DP_SOC_GENERAL_CTL */
+#define AUDIO_MODE_SPDIF_MODE			(0x1 << 8)
+#define AUDIO_MODE_MASTER_MODE			(0x0 << 8)
+#define MASTER_VIDEO_INTERLACE_EN		(0x1 << 4)
+#define VIDEO_MASTER_CLK_SEL			(0x1 << 2)
+#define VIDEO_MASTER_MODE_EN			(0x1 << 1)
+#define VIDEO_MODE_MASK				(0x1 << 0)
+#define VIDEO_MODE_SLAVE_MODE			(0x1 << 0)
+#define VIDEO_MODE_MASTER_MODE			(0x0 << 0)
+
+/* ANALOGIX_DP_PKT_SEND_CTL */
+#define IF_UP					(0x1 << 4)
+#define IF_EN					(0x1 << 0)
+
+/* ANALOGIX_DP_CRC_CON */
+#define PSR_VID_CRC_FLUSH			(0x1 << 2)
+#define PSR_VID_CRC_ENABLE			(0x1 << 0)
+
+#endif /* _ANALOGIX_DP_REG_H */
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
new file mode 100644
index 000000000..5168628f1
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -0,0 +1,2821 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+#include <linux/gcd.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+
+#include <drm/display/drm_dp_aux_bus.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <media/v4l2-fwnode.h>
+#include <sound/hdmi-codec.h>
+#include <video/display_timing.h>
+
+#include "anx7625.h"
+
+/*
+ * There is a sync issue while access I2C register between AP(CPU) and
+ * internal firmware(OCM), to avoid the race condition, AP should access
+ * the reserved slave address before slave address occurs changes.
+ */
+static int i2c_access_workaround(struct anx7625_data *ctx,
+				 struct i2c_client *client)
+{
+	u8 offset;
+	struct device *dev = &client->dev;
+	int ret;
+
+	if (client == ctx->last_client)
+		return 0;
+
+	ctx->last_client = client;
+
+	if (client == ctx->i2c.tcpc_client)
+		offset = RSVD_00_ADDR;
+	else if (client == ctx->i2c.tx_p0_client)
+		offset = RSVD_D1_ADDR;
+	else if (client == ctx->i2c.tx_p1_client)
+		offset = RSVD_60_ADDR;
+	else if (client == ctx->i2c.rx_p0_client)
+		offset = RSVD_39_ADDR;
+	else if (client == ctx->i2c.rx_p1_client)
+		offset = RSVD_7F_ADDR;
+	else
+		offset = RSVD_00_ADDR;
+
+	ret = i2c_smbus_write_byte_data(client, offset, 0x00);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev,
+			      "fail to access i2c id=%x\n:%x",
+			      client->addr, offset);
+
+	return ret;
+}
+
+static int anx7625_reg_read(struct anx7625_data *ctx,
+			    struct i2c_client *client, u8 reg_addr)
+{
+	int ret;
+	struct device *dev = &client->dev;
+
+	i2c_access_workaround(ctx, client);
+
+	ret = i2c_smbus_read_byte_data(client, reg_addr);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
+			      client->addr, reg_addr);
+
+	return ret;
+}
+
+static int anx7625_reg_block_read(struct anx7625_data *ctx,
+				  struct i2c_client *client,
+				  u8 reg_addr, u8 len, u8 *buf)
+{
+	int ret;
+	struct device *dev = &client->dev;
+
+	i2c_access_workaround(ctx, client);
+
+	ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
+			      client->addr, reg_addr);
+
+	return ret;
+}
+
+static int anx7625_reg_write(struct anx7625_data *ctx,
+			     struct i2c_client *client,
+			     u8 reg_addr, u8 reg_val)
+{
+	int ret;
+	struct device *dev = &client->dev;
+
+	i2c_access_workaround(ctx, client);
+
+	ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
+
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
+			      client->addr, reg_addr);
+
+	return ret;
+}
+
+static int anx7625_reg_block_write(struct anx7625_data *ctx,
+				   struct i2c_client *client,
+				   u8 reg_addr, u8 len, u8 *buf)
+{
+	int ret;
+	struct device *dev = &client->dev;
+
+	i2c_access_workaround(ctx, client);
+
+	ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf);
+	if (ret < 0)
+		dev_err(dev, "write i2c block failed id=%x\n:%x",
+			client->addr, reg_addr);
+
+	return ret;
+}
+
+static int anx7625_write_or(struct anx7625_data *ctx,
+			    struct i2c_client *client,
+			    u8 offset, u8 mask)
+{
+	int val;
+
+	val = anx7625_reg_read(ctx, client, offset);
+	if (val < 0)
+		return val;
+
+	return anx7625_reg_write(ctx, client, offset, (val | (mask)));
+}
+
+static int anx7625_write_and(struct anx7625_data *ctx,
+			     struct i2c_client *client,
+			     u8 offset, u8 mask)
+{
+	int val;
+
+	val = anx7625_reg_read(ctx, client, offset);
+	if (val < 0)
+		return val;
+
+	return anx7625_reg_write(ctx, client, offset, (val & (mask)));
+}
+
+static int anx7625_write_and_or(struct anx7625_data *ctx,
+				struct i2c_client *client,
+				u8 offset, u8 and_mask, u8 or_mask)
+{
+	int val;
+
+	val = anx7625_reg_read(ctx, client, offset);
+	if (val < 0)
+		return val;
+
+	return anx7625_reg_write(ctx, client,
+				 offset, (val & and_mask) | (or_mask));
+}
+
+static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
+{
+	int i, ret;
+
+	ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+			       AUDIO_CONTROL_REGISTER, 0x80);
+	for (i = 0; i < 13; i++)
+		ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+					 VIDEO_BIT_MATRIX_12 + i,
+					 0x18 + i);
+
+	return ret;
+}
+
+static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
+{
+	return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
+}
+
+static int wait_aux_op_finish(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int val;
+	int ret;
+
+	ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
+				 ctx, val,
+				 (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
+				 2000,
+				 2000 * 150);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "aux operation fail!\n");
+		return -EIO;
+	}
+
+	val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+			       AP_AUX_CTRL_STATUS);
+	if (val < 0 || (val & 0x0F)) {
+		DRM_DEV_ERROR(dev, "aux status %02x\n", val);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int anx7625_aux_trans(struct anx7625_data *ctx, u8 op, u32 address,
+			     u8 len, u8 *buf)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+	u8 addrh, addrm, addrl;
+	u8 cmd;
+	bool is_write = !(op & DP_AUX_I2C_READ);
+
+	if (len > DP_AUX_MAX_PAYLOAD_BYTES) {
+		dev_err(dev, "exceed aux buffer len.\n");
+		return -EINVAL;
+	}
+
+	if (!len)
+		return len;
+
+	addrl = address & 0xFF;
+	addrm = (address >> 8) & 0xFF;
+	addrh = (address >> 16) & 0xFF;
+
+	if (!is_write)
+		op &= ~DP_AUX_I2C_MOT;
+	cmd = DPCD_CMD(len, op);
+
+	/* Set command and length */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_COMMAND, cmd);
+
+	/* Set aux access address */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_7_0, addrl);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_15_8, addrm);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_19_16, addrh);
+
+	if (is_write)
+		ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client,
+					       AP_AUX_BUFF_START, len, buf);
+	/* Enable aux access */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+
+	if (ret < 0) {
+		dev_err(dev, "cannot access aux related register.\n");
+		return -EIO;
+	}
+
+	ret = wait_aux_op_finish(ctx);
+	if (ret < 0) {
+		dev_err(dev, "aux IO error: wait aux op finish.\n");
+		return ret;
+	}
+
+	/* Write done */
+	if (is_write)
+		return len;
+
+	/* Read done, read out dpcd data */
+	ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+				     AP_AUX_BUFF_START, len, buf);
+	if (ret < 0) {
+		dev_err(dev, "read dpcd register failed\n");
+		return -EIO;
+	}
+
+	return len;
+}
+
+static int anx7625_video_mute_control(struct anx7625_data *ctx,
+				      u8 status)
+{
+	int ret;
+
+	if (status) {
+		/* Set mute on flag */
+		ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+				       AP_AV_STATUS, AP_MIPI_MUTE);
+		/* Clear mipi RX en */
+		ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+					 AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
+	} else {
+		/* Mute off flag */
+		ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+					AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+		/* Set MIPI RX EN */
+		ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+					AP_AV_STATUS, AP_MIPI_RX_EN);
+	}
+
+	return ret;
+}
+
+/* Reduction of fraction a/b */
+static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
+{
+	unsigned long gcd_num;
+	unsigned long tmp_a, tmp_b;
+	u32 i = 1;
+
+	gcd_num = gcd(*a, *b);
+	*a /= gcd_num;
+	*b /= gcd_num;
+
+	tmp_a = *a;
+	tmp_b = *b;
+
+	while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
+		i++;
+		*a = tmp_a / i;
+		*b = tmp_b / i;
+	}
+
+	/*
+	 * In the end, make a, b larger to have higher ODFC PLL
+	 * output frequency accuracy
+	 */
+	while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
+		*a <<= 1;
+		*b <<= 1;
+	}
+
+	*a >>= 1;
+	*b >>= 1;
+}
+
+static int anx7625_calculate_m_n(u32 pixelclock,
+				 unsigned long *m,
+				 unsigned long *n,
+				 u8 *post_divider)
+{
+	if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
+		/* Pixel clock frequency is too high */
+		DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
+			  pixelclock,
+			  PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
+		return -EINVAL;
+	}
+
+	if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
+		/* Pixel clock frequency is too low */
+		DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
+			  pixelclock,
+			  PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
+		return -EINVAL;
+	}
+
+	for (*post_divider = 1;
+		pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
+		*post_divider += 1;
+
+	if (*post_divider > POST_DIVIDER_MAX) {
+		for (*post_divider = 1;
+			(pixelclock <
+			 (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
+			*post_divider += 1;
+
+		if (*post_divider > POST_DIVIDER_MAX) {
+			DRM_ERROR("cannot find property post_divider(%d)\n",
+				  *post_divider);
+			return -EDOM;
+		}
+	}
+
+	/* Patch to improve the accuracy */
+	if (*post_divider == 7) {
+		/* 27,000,000 is not divisible by 7 */
+		*post_divider = 8;
+	} else if (*post_divider == 11) {
+		/* 27,000,000 is not divisible by 11 */
+		*post_divider = 12;
+	} else if ((*post_divider == 13) || (*post_divider == 14)) {
+		/* 27,000,000 is not divisible by 13 or 14 */
+		*post_divider = 15;
+	}
+
+	if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
+		DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
+			  pixelclock * (*post_divider),
+			  PLL_OUT_FREQ_ABS_MAX);
+		return -EDOM;
+	}
+
+	*m = pixelclock;
+	*n = XTAL_FRQ / (*post_divider);
+
+	anx7625_reduction_of_a_fraction(m, n);
+
+	return 0;
+}
+
+static int anx7625_odfc_config(struct anx7625_data *ctx,
+			       u8 post_divider)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+
+	/* Config input reference clock frequency 27MHz/19.2MHz */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+				~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+				(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+	/* Post divider */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_DIGITAL_PLL_8, 0x0f);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
+				post_divider << 4);
+
+	/* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+				 ~MIPI_PLL_VCO_TUNE_REG_VAL);
+
+	/* Reset ODFC PLL */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+				 ~MIPI_PLL_RESET_N);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+				MIPI_PLL_RESET_N);
+
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error.\n");
+
+	return ret;
+}
+
+/*
+ * The MIPI source video data exist large variation (e.g. 59Hz ~ 61Hz),
+ * anx7625 defined K ratio for matching MIPI input video clock and
+ * DP output video clock. Increase K value can match bigger video data
+ * variation. IVO panel has small variation than DP CTS spec, need
+ * decrease the K value.
+ */
+static int anx7625_set_k_value(struct anx7625_data *ctx)
+{
+	struct edid *edid = (struct edid *)ctx->slimport_edid_p.edid_raw_data;
+
+	if (edid->mfg_id[0] == IVO_MID0 && edid->mfg_id[1] == IVO_MID1)
+		return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+					 MIPI_DIGITAL_ADJ_1, 0x3B);
+
+	return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_DIGITAL_ADJ_1, 0x3D);
+}
+
+static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	unsigned long m, n;
+	u16 htotal;
+	int ret;
+	u8 post_divider = 0;
+
+	ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
+				    &m, &n, &post_divider);
+
+	if (ret) {
+		DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
+		return ret;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
+			     m, n, post_divider);
+
+	/* Configure pixel clock */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
+				(ctx->dt.pixelclock.min / 1000) & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
+				 (ctx->dt.pixelclock.min / 1000) >> 8);
+	/* Lane count */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+			MIPI_LANE_CTRL_0, 0xfc);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
+				MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
+
+	/* Htotal */
+	htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
+		ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
+	/* Hactive */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
+	/* HFP */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_FRONT_PORCH_H,
+			ctx->dt.hfront_porch.min >> 8);
+	/* HWS */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
+	/* HBP */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
+	/* Vactive */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
+			ctx->dt.vactive.min);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
+			ctx->dt.vactive.min >> 8);
+	/* VFP */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
+	/* VWS */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
+	/* VBP */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+			VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
+	/* M value */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+			MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+			MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+			MIPI_PLL_M_NUM_7_0, (m & 0xff));
+	/* N value */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+			MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+			MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
+			(n & 0xff));
+
+	anx7625_set_k_value(ctx);
+
+	ret |= anx7625_odfc_config(ctx, post_divider - 1);
+
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
+
+	return ret;
+}
+
+static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
+{
+	int val;
+	struct device *dev = ctx->dev;
+
+	/* Swap MIPI-DSI data lane 3 P and N */
+	val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
+	if (val < 0) {
+		DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
+		return -EIO;
+	}
+
+	val |= (1 << MIPI_SWAP_CH3);
+	return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
+}
+
+static int anx7625_api_dsi_config(struct anx7625_data *ctx)
+
+{
+	int val, ret;
+	struct device *dev = ctx->dev;
+
+	/* Swap MIPI-DSI data lane 3 P and N */
+	ret = anx7625_swap_dsi_lane3(ctx);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
+		return ret;
+	}
+
+	/* DSI clock settings */
+	val = (0 << MIPI_HS_PWD_CLK)		|
+		(0 << MIPI_HS_RT_CLK)		|
+		(0 << MIPI_PD_CLK)		|
+		(1 << MIPI_CLK_RT_MANUAL_PD_EN)	|
+		(1 << MIPI_CLK_HS_MANUAL_PD_EN)	|
+		(0 << MIPI_CLK_DET_DET_BYPASS)	|
+		(0 << MIPI_CLK_MISS_CTRL)	|
+		(0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				MIPI_PHY_CONTROL_3, val);
+
+	/*
+	 * Decreased HS prepare timing delay from 160ns to 80ns work with
+	 *     a) Dragon board 810 series (Qualcomm AP)
+	 *     b) Moving Pixel DSI source (PG3A pattern generator +
+	 *	P332 D-PHY Probe) default D-PHY timing
+	 *	5ns/step
+	 */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_TIME_HS_PRPR, 0x10);
+
+	/* Enable DSI mode*/
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
+				SELECT_DSI << MIPI_DPI_SELECT);
+
+	ret |= anx7625_dsi_video_timing_config(ctx);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
+		return ret;
+	}
+
+	/* Toggle m, n ready */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+				~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
+	usleep_range(1000, 1100);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+				MIPI_M_NUM_READY | MIPI_N_NUM_READY);
+
+	/* Configure integer stable register */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_VIDEO_STABLE_CNT, 0x02);
+	/* Power on MIPI RX */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_LANE_CTRL_10, 0x00);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_LANE_CTRL_10, 0x80);
+
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
+
+	return ret;
+}
+
+static int anx7625_dsi_config(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
+
+	/* DSC disable */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+				R_DSC_CTRL_0, ~DSC_EN);
+
+	ret |= anx7625_api_dsi_config(ctx);
+
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "IO error : api dsi config error.\n");
+		return ret;
+	}
+
+	/* Set MIPI RX EN */
+	ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+			       AP_AV_STATUS, AP_MIPI_RX_EN);
+	/* Clear mute flag */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+				 AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error : enable mipi rx fail.\n");
+	else
+		DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
+
+	return ret;
+}
+
+static int anx7625_api_dpi_config(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	u16 freq = ctx->dt.pixelclock.min / 1000;
+	int ret;
+
+	/* configure pixel clock */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				PIXEL_CLOCK_L, freq & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 PIXEL_CLOCK_H, (freq >> 8));
+
+	/* set DPI mode */
+	/* set to DPI PLL module sel */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_DIGITAL_PLL_9, 0x20);
+	/* power down MIPI */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_LANE_CTRL_10, 0x08);
+	/* enable DPI mode */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+				 MIPI_DIGITAL_PLL_18, 0x1C);
+	/* set first edge */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+				 VIDEO_CONTROL_0, 0x06);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
+
+	return ret;
+}
+
+static int anx7625_dpi_config(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
+
+	/* DSC disable */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+				R_DSC_CTRL_0, ~DSC_EN);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
+		return ret;
+	}
+
+	ret = anx7625_config_bit_matrix(ctx);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
+		return ret;
+	}
+
+	ret = anx7625_api_dpi_config(ctx);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
+		return ret;
+	}
+
+	/* set MIPI RX EN */
+	ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+			       AP_AV_STATUS, AP_MIPI_RX_EN);
+	/* clear mute flag */
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+				 AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
+
+	return ret;
+}
+
+static int anx7625_read_flash_status(struct anx7625_data *ctx)
+{
+	return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, R_RAM_CTRL);
+}
+
+static int anx7625_hdcp_key_probe(struct anx7625_data *ctx)
+{
+	int ret, val;
+	struct device *dev = ctx->dev;
+	u8 ident[FLASH_BUF_LEN];
+
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				FLASH_ADDR_HIGH, 0x91);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 FLASH_ADDR_LOW, 0xA0);
+	if (ret < 0) {
+		dev_err(dev, "IO error : set key flash address.\n");
+		return ret;
+	}
+
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				FLASH_LEN_HIGH, (FLASH_BUF_LEN - 1) >> 8);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 FLASH_LEN_LOW, (FLASH_BUF_LEN - 1) & 0xFF);
+	if (ret < 0) {
+		dev_err(dev, "IO error : set key flash len.\n");
+		return ret;
+	}
+
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				R_FLASH_RW_CTRL, FLASH_READ);
+	ret |= readx_poll_timeout(anx7625_read_flash_status,
+				  ctx, val,
+				  ((val & FLASH_DONE) || (val < 0)),
+				  2000,
+				  2000 * 150);
+	if (ret) {
+		dev_err(dev, "flash read access fail!\n");
+		return -EIO;
+	}
+
+	ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+				     FLASH_BUF_BASE_ADDR,
+				     FLASH_BUF_LEN, ident);
+	if (ret < 0) {
+		dev_err(dev, "read flash data fail!\n");
+		return -EIO;
+	}
+
+	if (ident[29] == 0xFF && ident[30] == 0xFF && ident[31] == 0xFF)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int anx7625_hdcp_key_load(struct anx7625_data *ctx)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+
+	/* Select HDCP 1.4 KEY */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				R_BOOT_RETRY, 0x12);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 FLASH_ADDR_HIGH, HDCP14KEY_START_ADDR >> 8);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 FLASH_ADDR_LOW, HDCP14KEY_START_ADDR & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 R_RAM_LEN_H, HDCP14KEY_SIZE >> 12);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 R_RAM_LEN_L, HDCP14KEY_SIZE >> 4);
+
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 R_RAM_ADDR_H, 0);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 R_RAM_ADDR_L, 0);
+	/* Enable HDCP 1.4 KEY load */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 R_RAM_CTRL, DECRYPT_EN | LOAD_START);
+	dev_dbg(dev, "load HDCP 1.4 key done\n");
+	return ret;
+}
+
+static int anx7625_hdcp_disable(struct anx7625_data *ctx)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+
+	dev_dbg(dev, "disable HDCP 1.4\n");
+
+	/* Disable HDCP */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+	/* Try auth flag */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+	/* Interrupt for DRM */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+	if (ret < 0)
+		dev_err(dev, "fail to disable HDCP\n");
+
+	return anx7625_write_and(ctx, ctx->i2c.tx_p0_client,
+				 TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF);
+}
+
+static int anx7625_hdcp_enable(struct anx7625_data *ctx)
+{
+	u8 bcap;
+	int ret;
+	struct device *dev = ctx->dev;
+
+	ret = anx7625_hdcp_key_probe(ctx);
+	if (ret) {
+		dev_dbg(dev, "no key found, not to do hdcp\n");
+		return ret;
+	}
+
+	/* Read downstream capability */
+	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_READ, DP_AUX_HDCP_BCAPS, 1, &bcap);
+	if (ret < 0)
+		return ret;
+
+	if (!(bcap & DP_BCAPS_HDCP_CAPABLE)) {
+		pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap);
+		return 0;
+	}
+
+	dev_dbg(dev, "enable HDCP 1.4\n");
+
+	/* First clear HDCP state */
+	ret = anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+				TX_HDCP_CTRL0,
+				KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN);
+	usleep_range(1000, 1100);
+	/* Second clear HDCP state */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+				 TX_HDCP_CTRL0,
+				 KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN);
+
+	/* Set time for waiting KSVR */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+				 SP_TX_WAIT_KSVR_TIME, 0xc8);
+	/* Set time for waiting R0 */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+				 SP_TX_WAIT_R0_TIME, 0xb0);
+	ret |= anx7625_hdcp_key_load(ctx);
+	if (ret) {
+		pr_warn("prepare HDCP key failed.\n");
+		return ret;
+	}
+
+	ret = anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xee, 0x20);
+
+	/* Try auth flag */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+	/* Interrupt for DRM */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+	if (ret < 0)
+		dev_err(dev, "fail to enable HDCP\n");
+
+	return anx7625_write_or(ctx, ctx->i2c.tx_p0_client,
+				TX_HDCP_CTRL0, HARD_AUTH_EN);
+}
+
+static void anx7625_dp_start(struct anx7625_data *ctx)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+	u8 data;
+
+	if (!ctx->display_timing_valid) {
+		DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
+		return;
+	}
+
+	dev_dbg(dev, "set downstream sink into normal\n");
+	/* Downstream sink enter into normal mode */
+	data = DP_SET_POWER_D0;
+	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
+	if (ret < 0)
+		dev_err(dev, "IO error : set sink into normal mode fail\n");
+
+	/* Disable HDCP */
+	anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+
+	if (ctx->pdata.is_dpi)
+		ret = anx7625_dpi_config(ctx);
+	else
+		ret = anx7625_dsi_config(ctx);
+
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
+
+	ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+
+	ctx->dp_en = 1;
+}
+
+static void anx7625_dp_stop(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+	u8 data;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
+
+	/*
+	 * Video disable: 0x72:08 bit 7 = 0;
+	 * Audio disable: 0x70:87 bit 0 = 0;
+	 */
+	ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
+	ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
+
+	ret |= anx7625_video_mute_control(ctx, 1);
+
+	dev_dbg(dev, "notify downstream enter into standby\n");
+	/* Downstream monitor enter into standby mode */
+	data = DP_SET_POWER_D3;
+	ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
+
+	ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+
+	ctx->dp_en = 0;
+}
+
+static int sp_tx_rst_aux(struct anx7625_data *ctx)
+{
+	int ret;
+
+	ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+			       AUX_RST);
+	ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+				 ~AUX_RST);
+	return ret;
+}
+
+static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
+{
+	int ret;
+
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_BUFF_START, offset);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_COMMAND, 0x04);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+	return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
+{
+	int ret;
+
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_COMMAND, len_cmd);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+	return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_get_edid_block(struct anx7625_data *ctx)
+{
+	int c = 0;
+	struct device *dev = ctx->dev;
+
+	sp_tx_aux_wr(ctx, 0x7e);
+	sp_tx_aux_rd(ctx, 0x01);
+	c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
+	if (c < 0) {
+		DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
+		return -EIO;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
+
+	if (c > MAX_EDID_BLOCK)
+		c = 1;
+
+	return c;
+}
+
+static int edid_read(struct anx7625_data *ctx,
+		     u8 offset, u8 *pblock_buf)
+{
+	int ret, cnt;
+	struct device *dev = ctx->dev;
+
+	for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+		sp_tx_aux_wr(ctx, offset);
+		/* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+		ret = sp_tx_aux_rd(ctx, 0xf1);
+
+		if (ret) {
+			ret = sp_tx_rst_aux(ctx);
+			DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
+		} else {
+			ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+						     AP_AUX_BUFF_START,
+						     MAX_DPCD_BUFFER_SIZE,
+						     pblock_buf);
+			if (ret > 0)
+				break;
+		}
+	}
+
+	if (cnt > EDID_TRY_CNT)
+		return -EIO;
+
+	return ret;
+}
+
+static int segments_edid_read(struct anx7625_data *ctx,
+			      u8 segment, u8 *buf, u8 offset)
+{
+	u8 cnt;
+	int ret;
+	struct device *dev = ctx->dev;
+
+	/* Write address only */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_ADDR_7_0, 0x30);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_COMMAND, 0x04);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_CTRL_STATUS,
+				 AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
+
+	ret |= wait_aux_op_finish(ctx);
+	/* Write segment address */
+	ret |= sp_tx_aux_wr(ctx, segment);
+	/* Data read */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_7_0, 0x50);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
+		return ret;
+	}
+
+	for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+		sp_tx_aux_wr(ctx, offset);
+		/* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+		ret = sp_tx_aux_rd(ctx, 0xf1);
+
+		if (ret) {
+			ret = sp_tx_rst_aux(ctx);
+			DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
+		} else {
+			ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+						     AP_AUX_BUFF_START,
+						     MAX_DPCD_BUFFER_SIZE, buf);
+			if (ret > 0)
+				break;
+		}
+	}
+
+	if (cnt > EDID_TRY_CNT)
+		return -EIO;
+
+	return ret;
+}
+
+static int sp_tx_edid_read(struct anx7625_data *ctx,
+			   u8 *pedid_blocks_buf)
+{
+	u8 offset;
+	int edid_pos;
+	int count, blocks_num;
+	u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
+	u8 i, j;
+	int g_edid_break = 0;
+	int ret;
+	struct device *dev = ctx->dev;
+
+	/* Address initial */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				AP_AUX_ADDR_7_0, 0x50);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_15_8, 0);
+	ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_19_16, 0xf0);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
+		return -EIO;
+	}
+
+	blocks_num = sp_tx_get_edid_block(ctx);
+	if (blocks_num < 0)
+		return blocks_num;
+
+	count = 0;
+
+	do {
+		switch (count) {
+		case 0:
+		case 1:
+			for (i = 0; i < 8; i++) {
+				offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
+				g_edid_break = edid_read(ctx, offset,
+							 pblock_buf);
+
+				if (g_edid_break < 0)
+					break;
+
+				memcpy(&pedid_blocks_buf[offset],
+				       pblock_buf,
+				       MAX_DPCD_BUFFER_SIZE);
+			}
+
+			break;
+		case 2:
+			offset = 0x00;
+
+			for (j = 0; j < 8; j++) {
+				edid_pos = (j + count * 8) *
+					MAX_DPCD_BUFFER_SIZE;
+
+				if (g_edid_break == 1)
+					break;
+
+				ret = segments_edid_read(ctx, count / 2,
+							 pblock_buf, offset);
+				if (ret < 0)
+					return ret;
+
+				memcpy(&pedid_blocks_buf[edid_pos],
+				       pblock_buf,
+				       MAX_DPCD_BUFFER_SIZE);
+				offset = offset + 0x10;
+			}
+
+			break;
+		case 3:
+			offset = 0x80;
+
+			for (j = 0; j < 8; j++) {
+				edid_pos = (j + count * 8) *
+					MAX_DPCD_BUFFER_SIZE;
+				if (g_edid_break == 1)
+					break;
+
+				ret = segments_edid_read(ctx, count / 2,
+							 pblock_buf, offset);
+				if (ret < 0)
+					return ret;
+
+				memcpy(&pedid_blocks_buf[edid_pos],
+				       pblock_buf,
+				       MAX_DPCD_BUFFER_SIZE);
+				offset = offset + 0x10;
+			}
+
+			break;
+		default:
+			break;
+		}
+
+		count++;
+
+	} while (blocks_num >= count);
+
+	/* Check edid data */
+	if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
+		DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
+		return -EINVAL;
+	}
+
+	/* Reset aux channel */
+	ret = sp_tx_rst_aux(ctx);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to reset aux channel!\n");
+		return ret;
+	}
+
+	return (blocks_num + 1);
+}
+
+static void anx7625_power_on(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret, i;
+
+	if (!ctx->pdata.low_power_mode) {
+		DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) {
+		ret = regulator_enable(ctx->pdata.supplies[i].consumer);
+		if (ret < 0) {
+			DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n",
+					     i, ret);
+			goto reg_err;
+		}
+		usleep_range(2000, 2100);
+	}
+
+	usleep_range(11000, 12000);
+
+	/* Power on pin enable */
+	gpiod_set_value(ctx->pdata.gpio_p_on, 1);
+	usleep_range(10000, 11000);
+	/* Power reset pin enable */
+	gpiod_set_value(ctx->pdata.gpio_reset, 1);
+	usleep_range(10000, 11000);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
+	return;
+reg_err:
+	for (--i; i >= 0; i--)
+		regulator_disable(ctx->pdata.supplies[i].consumer);
+}
+
+static void anx7625_power_standby(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+
+	if (!ctx->pdata.low_power_mode) {
+		DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+		return;
+	}
+
+	gpiod_set_value(ctx->pdata.gpio_reset, 0);
+	usleep_range(1000, 1100);
+	gpiod_set_value(ctx->pdata.gpio_p_on, 0);
+	usleep_range(1000, 1100);
+
+	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies),
+				     ctx->pdata.supplies);
+	if (ret < 0)
+		DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
+}
+
+/* Basic configurations of ANX7625 */
+static void anx7625_config(struct anx7625_data *ctx)
+{
+	anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+			  XTAL_FRQ_SEL, XTAL_FRQ_27M);
+}
+
+static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+
+	/* Reset main ocm */
+	ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
+	/* Disable PD */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				 AP_AV_STATUS, AP_DISABLE_PD);
+	/* Release main ocm */
+	ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
+
+	if (ret < 0)
+		DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
+	else
+		DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
+}
+
+static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+
+	/* Check interface workable */
+	ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+			       FLASH_LOAD_STA);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
+		return ret;
+	}
+	if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
+		return -ENODEV;
+
+	anx7625_disable_pd_protocol(ctx);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
+			     anx7625_reg_read(ctx,
+					      ctx->i2c.rx_p0_client,
+					      OCM_FW_VERSION),
+			     anx7625_reg_read(ctx,
+					      ctx->i2c.rx_p0_client,
+					      OCM_FW_REVERSION));
+	DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
+			     ANX7625_DRV_VERSION);
+
+	return 0;
+}
+
+static void anx7625_power_on_init(struct anx7625_data *ctx)
+{
+	int retry_count, i;
+
+	for (retry_count = 0; retry_count < 3; retry_count++) {
+		anx7625_power_on(ctx);
+		anx7625_config(ctx);
+
+		for (i = 0; i < OCM_LOADING_TIME; i++) {
+			if (!anx7625_ocm_loading_check(ctx))
+				return;
+			usleep_range(1000, 1100);
+		}
+		anx7625_power_standby(ctx);
+	}
+}
+
+static void anx7625_init_gpio(struct anx7625_data *platform)
+{
+	struct device *dev = platform->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
+
+	/* Gpio for chip power enable */
+	platform->pdata.gpio_p_on =
+		devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+	if (IS_ERR_OR_NULL(platform->pdata.gpio_p_on)) {
+		DRM_DEV_DEBUG_DRIVER(dev, "no enable gpio found\n");
+		platform->pdata.gpio_p_on = NULL;
+	}
+
+	/* Gpio for chip reset */
+	platform->pdata.gpio_reset =
+		devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR_OR_NULL(platform->pdata.gpio_reset)) {
+		DRM_DEV_DEBUG_DRIVER(dev, "no reset gpio found\n");
+		platform->pdata.gpio_reset = NULL;
+	}
+
+	if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
+		platform->pdata.low_power_mode = 1;
+		DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
+				     desc_to_gpio(platform->pdata.gpio_p_on),
+				     desc_to_gpio(platform->pdata.gpio_reset));
+	} else {
+		platform->pdata.low_power_mode = 0;
+		DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
+	}
+}
+
+static void anx7625_stop_dp_work(struct anx7625_data *ctx)
+{
+	ctx->hpd_status = 0;
+	ctx->hpd_high_cnt = 0;
+}
+
+static void anx7625_start_dp_work(struct anx7625_data *ctx)
+{
+	int ret;
+	struct device *dev = ctx->dev;
+
+	if (ctx->hpd_high_cnt >= 2) {
+		DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
+		return;
+	}
+
+	ctx->hpd_status = 1;
+	ctx->hpd_high_cnt++;
+
+	/* Not support HDCP */
+	ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+
+	/* Try auth flag */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+	/* Interrupt for DRM */
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
+		return;
+	}
+
+	ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
+	if (ret < 0)
+		return;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
+}
+
+static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
+{
+	int ret;
+
+	/* Set irq detect window to 2ms */
+	ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+				HPD_DET_TIMER_BIT0_7, HPD_TIME & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+				 HPD_DET_TIMER_BIT8_15,
+				 (HPD_TIME >> 8) & 0xFF);
+	ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+				 HPD_DET_TIMER_BIT16_23,
+				 (HPD_TIME >> 16) & 0xFF);
+	if (ret < 0)
+		return ret;
+
+	return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
+}
+
+static int _anx7625_hpd_polling(struct anx7625_data *ctx,
+				unsigned long wait_us)
+{
+	int ret, val;
+	struct device *dev = ctx->dev;
+
+	/* Interrupt mode, no need poll HPD status, just return */
+	if (ctx->pdata.intp_irq)
+		return 0;
+
+	ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
+				 ctx, val,
+				 ((val & HPD_STATUS) || (val < 0)),
+				 wait_us / 100,
+				 wait_us);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "no hpd.\n");
+		return ret;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "system status: 0x%x. HPD raise up.\n", val);
+	anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+			  INTR_ALERT_1, 0xFF);
+	anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+			  INTERFACE_CHANGE_INT, 0);
+
+	anx7625_start_dp_work(ctx);
+
+	if (!ctx->pdata.panel_bridge && ctx->bridge_attached)
+		drm_helper_hpd_irq_event(ctx->bridge.dev);
+
+	return 0;
+}
+
+static int anx7625_wait_hpd_asserted(struct drm_dp_aux *aux,
+				     unsigned long wait_us)
+{
+	struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux);
+	struct device *dev = ctx->dev;
+	int ret;
+
+	pm_runtime_get_sync(dev);
+	ret = _anx7625_hpd_polling(ctx, wait_us);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
+}
+
+static void anx7625_remove_edid(struct anx7625_data *ctx)
+{
+	ctx->slimport_edid_p.edid_block_num = -1;
+}
+
+static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
+{
+	int i;
+
+	for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
+		anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+				  DP_TX_LANE0_SWING_REG0 + i,
+				  ctx->pdata.lane0_reg_data[i]);
+
+	for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
+		anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+				  DP_TX_LANE1_SWING_REG0 + i,
+				  ctx->pdata.lane1_reg_data[i]);
+}
+
+static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
+{
+	struct device *dev = ctx->dev;
+
+	/* HPD changed */
+	DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
+			     (u32)on);
+
+	if (on == 0) {
+		DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
+		anx7625_remove_edid(ctx);
+		anx7625_stop_dp_work(ctx);
+	} else {
+		DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
+		anx7625_start_dp_work(ctx);
+		anx7625_dp_adjust_swing(ctx);
+	}
+}
+
+static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
+{
+	int intr_vector, status;
+	struct device *dev = ctx->dev;
+
+	status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+				   INTR_ALERT_1, 0xFF);
+	if (status < 0) {
+		DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
+		return status;
+	}
+
+	intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+				       INTERFACE_CHANGE_INT);
+	if (intr_vector < 0) {
+		DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
+		return intr_vector;
+	}
+	DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
+	status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+				   INTERFACE_CHANGE_INT,
+				   intr_vector & (~intr_vector));
+	if (status < 0) {
+		DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
+		return status;
+	}
+
+	if (!(intr_vector & HPD_STATUS_CHANGE))
+		return -ENOENT;
+
+	status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+				  SYSTEM_STSTUS);
+	if (status < 0) {
+		DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
+		return status;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
+	dp_hpd_change_handler(ctx, status & HPD_STATUS);
+
+	return 0;
+}
+
+static void anx7625_work_func(struct work_struct *work)
+{
+	int event;
+	struct anx7625_data *ctx = container_of(work,
+						struct anx7625_data, work);
+
+	mutex_lock(&ctx->lock);
+
+	if (pm_runtime_suspended(ctx->dev)) {
+		mutex_unlock(&ctx->lock);
+		return;
+	}
+
+	event = anx7625_hpd_change_detect(ctx);
+
+	mutex_unlock(&ctx->lock);
+
+	if (event < 0)
+		return;
+
+	if (ctx->bridge_attached)
+		drm_helper_hpd_irq_event(ctx->bridge.dev);
+}
+
+static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
+{
+	struct anx7625_data *ctx = (struct anx7625_data *)data;
+
+	queue_work(ctx->workqueue, &ctx->work);
+
+	return IRQ_HANDLED;
+}
+
+static int anx7625_get_swing_setting(struct device *dev,
+				     struct anx7625_platform_data *pdata)
+{
+	int num_regs;
+
+	if (of_get_property(dev->of_node,
+			    "analogix,lane0-swing", &num_regs)) {
+		if (num_regs > DP_TX_SWING_REG_CNT)
+			num_regs = DP_TX_SWING_REG_CNT;
+
+		pdata->dp_lane0_swing_reg_cnt = num_regs;
+		of_property_read_u8_array(dev->of_node, "analogix,lane0-swing",
+					  pdata->lane0_reg_data, num_regs);
+	}
+
+	if (of_get_property(dev->of_node,
+			    "analogix,lane1-swing", &num_regs)) {
+		if (num_regs > DP_TX_SWING_REG_CNT)
+			num_regs = DP_TX_SWING_REG_CNT;
+
+		pdata->dp_lane1_swing_reg_cnt = num_regs;
+		of_property_read_u8_array(dev->of_node, "analogix,lane1-swing",
+					  pdata->lane1_reg_data, num_regs);
+	}
+
+	return 0;
+}
+
+static int anx7625_parse_dt(struct device *dev,
+			    struct anx7625_platform_data *pdata)
+{
+	struct device_node *np = dev->of_node, *ep0;
+	int bus_type, mipi_lanes;
+
+	anx7625_get_swing_setting(dev, pdata);
+
+	pdata->is_dpi = 0; /* default dsi mode */
+	of_node_put(pdata->mipi_host_node);
+	pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
+	if (!pdata->mipi_host_node) {
+		DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
+		return -ENODEV;
+	}
+
+	bus_type = 0;
+	mipi_lanes = MAX_LANES_SUPPORT;
+	ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
+	if (ep0) {
+		if (of_property_read_u32(ep0, "bus-type", &bus_type))
+			bus_type = 0;
+
+		mipi_lanes = drm_of_get_data_lanes_count(ep0, 1, MAX_LANES_SUPPORT);
+		of_node_put(ep0);
+	}
+
+	if (bus_type == V4L2_FWNODE_BUS_TYPE_DPI) /* bus type is DPI */
+		pdata->is_dpi = 1;
+
+	pdata->mipi_lanes = MAX_LANES_SUPPORT;
+	if (mipi_lanes > 0)
+		pdata->mipi_lanes = mipi_lanes;
+
+	if (pdata->is_dpi)
+		DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
+	else
+		DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
+
+	if (of_property_read_bool(np, "analogix,audio-enable"))
+		pdata->audio_en = 1;
+
+	return 0;
+}
+
+static int anx7625_parse_dt_panel(struct device *dev,
+				  struct anx7625_platform_data *pdata)
+{
+	struct device_node *np = dev->of_node;
+
+	pdata->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
+	if (IS_ERR(pdata->panel_bridge)) {
+		if (PTR_ERR(pdata->panel_bridge) == -ENODEV) {
+			pdata->panel_bridge = NULL;
+			return 0;
+		}
+
+		return PTR_ERR(pdata->panel_bridge);
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
+
+	return 0;
+}
+
+static bool anx7625_of_panel_on_aux_bus(struct device *dev)
+{
+	struct device_node *bus, *panel;
+
+	bus = of_get_child_by_name(dev->of_node, "aux-bus");
+	if (!bus)
+		return false;
+
+	panel = of_get_child_by_name(bus, "panel");
+	of_node_put(bus);
+	if (!panel)
+		return false;
+	of_node_put(panel);
+
+	return true;
+}
+
+static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct anx7625_data, bridge);
+}
+
+static ssize_t anx7625_aux_transfer(struct drm_dp_aux *aux,
+				    struct drm_dp_aux_msg *msg)
+{
+	struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux);
+	struct device *dev = ctx->dev;
+	u8 request = msg->request & ~DP_AUX_I2C_MOT;
+	int ret = 0;
+
+	mutex_lock(&ctx->aux_lock);
+	pm_runtime_get_sync(dev);
+	msg->reply = 0;
+	switch (request) {
+	case DP_AUX_NATIVE_WRITE:
+	case DP_AUX_I2C_WRITE:
+	case DP_AUX_NATIVE_READ:
+	case DP_AUX_I2C_READ:
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	if (!ret)
+		ret = anx7625_aux_trans(ctx, msg->request, msg->address,
+					msg->size, msg->buffer);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+	mutex_unlock(&ctx->aux_lock);
+
+	return ret;
+}
+
+static struct edid *anx7625_get_edid(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	struct s_edid_data *p_edid = &ctx->slimport_edid_p;
+	int edid_num;
+	u8 *edid;
+
+	edid = kmalloc(FOUR_BLOCK_SIZE, GFP_KERNEL);
+	if (!edid) {
+		DRM_DEV_ERROR(dev, "Fail to allocate buffer\n");
+		return NULL;
+	}
+
+	if (ctx->slimport_edid_p.edid_block_num > 0) {
+		memcpy(edid, ctx->slimport_edid_p.edid_raw_data,
+		       FOUR_BLOCK_SIZE);
+		return (struct edid *)edid;
+	}
+
+	pm_runtime_get_sync(dev);
+	_anx7625_hpd_polling(ctx, 5000 * 100);
+	edid_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
+	pm_runtime_put_sync(dev);
+
+	if (edid_num < 1) {
+		DRM_DEV_ERROR(dev, "Fail to read EDID: %d\n", edid_num);
+		kfree(edid);
+		return NULL;
+	}
+
+	p_edid->edid_block_num = edid_num;
+
+	memcpy(edid, ctx->slimport_edid_p.edid_raw_data, FOUR_BLOCK_SIZE);
+	return (struct edid *)edid;
+}
+
+static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
+
+	if (ctx->pdata.panel_bridge)
+		return connector_status_connected;
+
+	return ctx->hpd_status ? connector_status_connected :
+				     connector_status_disconnected;
+}
+
+static int anx7625_audio_hw_params(struct device *dev, void *data,
+				   struct hdmi_codec_daifmt *fmt,
+				   struct hdmi_codec_params *params)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+	int wl, ch, rate;
+	int ret = 0;
+
+	if (anx7625_sink_detect(ctx) == connector_status_disconnected) {
+		DRM_DEV_DEBUG_DRIVER(dev, "DP not connected\n");
+		return 0;
+	}
+
+	if (fmt->fmt != HDMI_DSP_A && fmt->fmt != HDMI_I2S) {
+		DRM_DEV_ERROR(dev, "only supports DSP_A & I2S\n");
+		return -EINVAL;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "setting %d Hz, %d bit, %d channels\n",
+			     params->sample_rate, params->sample_width,
+			     params->cea.channels);
+
+	if (fmt->fmt == HDMI_DSP_A)
+		ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+					   AUDIO_CHANNEL_STATUS_6,
+					   ~I2S_SLAVE_MODE,
+					   TDM_SLAVE_MODE);
+	else
+		ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+					   AUDIO_CHANNEL_STATUS_6,
+					   ~TDM_SLAVE_MODE,
+					   I2S_SLAVE_MODE);
+
+	/* Word length */
+	switch (params->sample_width) {
+	case 16:
+		wl = AUDIO_W_LEN_16_20MAX;
+		break;
+	case 18:
+		wl = AUDIO_W_LEN_18_20MAX;
+		break;
+	case 20:
+		wl = AUDIO_W_LEN_20_20MAX;
+		break;
+	case 24:
+		wl = AUDIO_W_LEN_24_24MAX;
+		break;
+	default:
+		DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support",
+				     params->sample_width);
+		return -EINVAL;
+	}
+	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+				    AUDIO_CHANNEL_STATUS_5,
+				    0xf0, wl);
+
+	/* Channel num */
+	switch (params->cea.channels) {
+	case 2:
+		ch = I2S_CH_2;
+		break;
+	case 4:
+		ch = TDM_CH_4;
+		break;
+	case 6:
+		ch = TDM_CH_6;
+		break;
+	case 8:
+		ch = TDM_CH_8;
+		break;
+	default:
+		DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support",
+				     params->cea.channels);
+		return -EINVAL;
+	}
+	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+			       AUDIO_CHANNEL_STATUS_6, 0x1f, ch << 5);
+	if (ch > I2S_CH_2)
+		ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+				AUDIO_CHANNEL_STATUS_6, AUDIO_LAYOUT);
+	else
+		ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
+				AUDIO_CHANNEL_STATUS_6, ~AUDIO_LAYOUT);
+
+	/* FS */
+	switch (params->sample_rate) {
+	case 32000:
+		rate = AUDIO_FS_32K;
+		break;
+	case 44100:
+		rate = AUDIO_FS_441K;
+		break;
+	case 48000:
+		rate = AUDIO_FS_48K;
+		break;
+	case 88200:
+		rate = AUDIO_FS_882K;
+		break;
+	case 96000:
+		rate = AUDIO_FS_96K;
+		break;
+	case 176400:
+		rate = AUDIO_FS_1764K;
+		break;
+	case 192000:
+		rate = AUDIO_FS_192K;
+		break;
+	default:
+		DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d not support",
+				     params->sample_rate);
+		return -EINVAL;
+	}
+	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+				    AUDIO_CHANNEL_STATUS_4,
+				    0xf0, rate);
+	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+				AP_AV_STATUS, AP_AUDIO_CHG);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "IO error : config audio.\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void anx7625_audio_shutdown(struct device *dev, void *data)
+{
+	DRM_DEV_DEBUG_DRIVER(dev, "stop audio\n");
+}
+
+static int anx7625_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+				       struct device_node *endpoint)
+{
+	struct of_endpoint of_ep;
+	int ret;
+
+	ret = of_graph_parse_endpoint(endpoint, &of_ep);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * HDMI sound should be located at external DPI port
+	 * Didn't have good way to check where is internal(DSI)
+	 * or external(DPI) bridge
+	 */
+	return 0;
+}
+
+static void
+anx7625_audio_update_connector_status(struct anx7625_data *ctx,
+				      enum drm_connector_status status)
+{
+	if (ctx->plugged_cb && ctx->codec_dev) {
+		ctx->plugged_cb(ctx->codec_dev,
+				status == connector_status_connected);
+	}
+}
+
+static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data,
+					 hdmi_codec_plugged_cb fn,
+					 struct device *codec_dev)
+{
+	struct anx7625_data *ctx = data;
+
+	ctx->plugged_cb = fn;
+	ctx->codec_dev = codec_dev;
+	anx7625_audio_update_connector_status(ctx, anx7625_sink_detect(ctx));
+
+	return 0;
+}
+
+static int anx7625_audio_get_eld(struct device *dev, void *data,
+				 u8 *buf, size_t len)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->connector) {
+		/* Pass en empty ELD if connector not available */
+		memset(buf, 0, len);
+	} else {
+		dev_dbg(dev, "audio copy eld\n");
+		memcpy(buf, ctx->connector->eld,
+		       min(sizeof(ctx->connector->eld), len));
+	}
+
+	return 0;
+}
+
+static const struct hdmi_codec_ops anx7625_codec_ops = {
+	.hw_params	= anx7625_audio_hw_params,
+	.audio_shutdown = anx7625_audio_shutdown,
+	.get_eld	= anx7625_audio_get_eld,
+	.get_dai_id	= anx7625_hdmi_i2s_get_dai_id,
+	.hook_plugged_cb = anx7625_audio_hook_plugged_cb,
+};
+
+static void anx7625_unregister_audio(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+
+	if (ctx->audio_pdev) {
+		platform_device_unregister(ctx->audio_pdev);
+		ctx->audio_pdev = NULL;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "unbound to %s", HDMI_CODEC_DRV_NAME);
+}
+
+static int anx7625_register_audio(struct device *dev, struct anx7625_data *ctx)
+{
+	struct hdmi_codec_pdata codec_data = {
+		.ops = &anx7625_codec_ops,
+		.max_i2s_channels = 8,
+		.i2s = 1,
+		.data = ctx,
+	};
+
+	ctx->audio_pdev = platform_device_register_data(dev,
+							HDMI_CODEC_DRV_NAME,
+							PLATFORM_DEVID_AUTO,
+							&codec_data,
+							sizeof(codec_data));
+
+	if (IS_ERR(ctx->audio_pdev))
+		return PTR_ERR(ctx->audio_pdev);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "bound to %s", HDMI_CODEC_DRV_NAME);
+
+	return 0;
+}
+
+static int anx7625_setup_dsi_device(struct anx7625_data *ctx)
+{
+	struct mipi_dsi_device *dsi;
+	struct device *dev = ctx->dev;
+	struct mipi_dsi_host *host;
+	const struct mipi_dsi_device_info info = {
+		.type = "anx7625",
+		.channel = 0,
+		.node = NULL,
+	};
+
+	host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node);
+	if (!host) {
+		DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
+		return -EPROBE_DEFER;
+	}
+
+	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+	if (IS_ERR(dsi)) {
+		DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
+		return -EINVAL;
+	}
+
+	dsi->lanes = ctx->pdata.mipi_lanes;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO	|
+		MIPI_DSI_MODE_VIDEO_SYNC_PULSE	|
+		MIPI_DSI_MODE_VIDEO_HSE	|
+		MIPI_DSI_HS_PKT_END_ALIGNED;
+
+	ctx->dsi = dsi;
+
+	return 0;
+}
+
+static int anx7625_attach_dsi(struct anx7625_data *ctx)
+{
+	struct device *dev = ctx->dev;
+	int ret;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
+
+	ret = devm_mipi_dsi_attach(dev, ctx->dsi);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
+		return ret;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
+
+	return 0;
+}
+
+static void hdcp_check_work_func(struct work_struct *work)
+{
+	u8 status;
+	struct delayed_work *dwork;
+	struct anx7625_data *ctx;
+	struct device *dev;
+	struct drm_device *drm_dev;
+
+	dwork = to_delayed_work(work);
+	ctx = container_of(dwork, struct anx7625_data, hdcp_work);
+	dev = ctx->dev;
+
+	if (!ctx->connector) {
+		dev_err(dev, "HDCP connector is null!");
+		return;
+	}
+
+	drm_dev = ctx->connector->dev;
+	drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL);
+	mutex_lock(&ctx->hdcp_wq_lock);
+
+	status = anx7625_reg_read(ctx, ctx->i2c.tx_p0_client, 0);
+	dev_dbg(dev, "sink HDCP status check: %.02x\n", status);
+	if (status & BIT(1)) {
+		ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+		drm_hdcp_update_content_protection(ctx->connector,
+						   ctx->hdcp_cp);
+		dev_dbg(dev, "update CP to ENABLE\n");
+	}
+
+	mutex_unlock(&ctx->hdcp_wq_lock);
+	drm_modeset_unlock(&drm_dev->mode_config.connection_mutex);
+}
+
+static int anx7625_connector_atomic_check(struct anx7625_data *ctx,
+					  struct drm_connector_state *state)
+{
+	struct device *dev = ctx->dev;
+	int cp;
+
+	dev_dbg(dev, "hdcp state check\n");
+	cp = state->content_protection;
+
+	if (cp == ctx->hdcp_cp)
+		return 0;
+
+	if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
+		if (ctx->dp_en) {
+			dev_dbg(dev, "enable HDCP\n");
+			anx7625_hdcp_enable(ctx);
+
+			queue_delayed_work(ctx->hdcp_workqueue,
+					   &ctx->hdcp_work,
+					   msecs_to_jiffies(2000));
+		}
+	}
+
+	if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+		if (ctx->hdcp_cp != DRM_MODE_CONTENT_PROTECTION_ENABLED) {
+			dev_err(dev, "current CP is not ENABLED\n");
+			return -EINVAL;
+		}
+		anx7625_hdcp_disable(ctx);
+		ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+		drm_hdcp_update_content_protection(ctx->connector,
+						   ctx->hdcp_cp);
+		dev_dbg(dev, "update CP to UNDESIRE\n");
+	}
+
+	if (cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
+		dev_err(dev, "Userspace illegal set to PROTECTION ENABLE\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int anx7625_bridge_attach(struct drm_bridge *bridge,
+				 enum drm_bridge_attach_flags flags)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	int err;
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+		return -EINVAL;
+
+	if (!bridge->encoder) {
+		DRM_DEV_ERROR(dev, "Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	ctx->aux.drm_dev = bridge->dev;
+	err = drm_dp_aux_register(&ctx->aux);
+	if (err) {
+		dev_err(dev, "failed to register aux channel: %d\n", err);
+		return err;
+	}
+
+	if (ctx->pdata.panel_bridge) {
+		err = drm_bridge_attach(bridge->encoder,
+					ctx->pdata.panel_bridge,
+					&ctx->bridge, flags);
+		if (err)
+			return err;
+	}
+
+	ctx->bridge_attached = 1;
+
+	return 0;
+}
+
+static void anx7625_bridge_detach(struct drm_bridge *bridge)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+
+	drm_dp_aux_unregister(&ctx->aux);
+}
+
+static enum drm_mode_status
+anx7625_bridge_mode_valid(struct drm_bridge *bridge,
+			  const struct drm_display_info *info,
+			  const struct drm_display_mode *mode)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
+
+	/* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
+	if (mode->clock > SUPPORT_PIXEL_CLOCK) {
+		DRM_DEV_DEBUG_DRIVER(dev,
+				     "drm mode invalid, pixelclock too high.\n");
+		return MODE_CLOCK_HIGH;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
+
+	return MODE_OK;
+}
+
+static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
+				    const struct drm_display_mode *old_mode,
+				    const struct drm_display_mode *mode)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
+
+	ctx->dt.pixelclock.min = mode->clock;
+	ctx->dt.hactive.min = mode->hdisplay;
+	ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
+	ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
+	ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
+	ctx->dt.vactive.min = mode->vdisplay;
+	ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
+	ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
+	ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
+
+	ctx->display_timing_valid = 1;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
+	DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
+			     ctx->dt.hactive.min,
+			     ctx->dt.hsync_len.min,
+			     ctx->dt.hfront_porch.min,
+			     ctx->dt.hback_porch.min);
+	DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
+			     ctx->dt.vactive.min,
+			     ctx->dt.vsync_len.min,
+			     ctx->dt.vfront_porch.min,
+			     ctx->dt.vback_porch.min);
+	DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
+			     mode->hdisplay,
+			     mode->hsync_start);
+	DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
+			     mode->hsync_end,
+			     mode->htotal);
+	DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
+			     mode->vdisplay,
+			     mode->vsync_start);
+	DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
+			     mode->vsync_end,
+			     mode->vtotal);
+}
+
+static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
+				      const struct drm_display_mode *mode,
+				      struct drm_display_mode *adj)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+	u32 hsync, hfp, hbp, hblanking;
+	u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
+	u32 vref, adj_clock;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
+
+	/* No need fixup for external monitor */
+	if (!ctx->pdata.panel_bridge)
+		return true;
+
+	hsync = mode->hsync_end - mode->hsync_start;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hbp = mode->htotal - mode->hsync_end;
+	hblanking = mode->htotal - mode->hdisplay;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
+	DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+			     hsync, hfp, hbp, adj->clock);
+	DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+			     adj->hsync_start, adj->hsync_end, adj->htotal);
+
+	adj_hfp = hfp;
+	adj_hsync = hsync;
+	adj_hbp = hbp;
+	adj_hblanking = hblanking;
+
+	/* HFP needs to be even */
+	if (hfp & 0x1) {
+		adj_hfp += 1;
+		adj_hblanking += 1;
+	}
+
+	/* HBP needs to be even */
+	if (hbp & 0x1) {
+		adj_hbp -= 1;
+		adj_hblanking -= 1;
+	}
+
+	/* HSYNC needs to be even */
+	if (hsync & 0x1) {
+		if (adj_hblanking < hblanking)
+			adj_hsync += 1;
+		else
+			adj_hsync -= 1;
+	}
+
+	/*
+	 * Once illegal timing detected, use default HFP, HSYNC, HBP
+	 * This adjusting made for built-in eDP panel, for the externel
+	 * DP monitor, may need return false.
+	 */
+	if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
+		adj_hsync = SYNC_LEN_DEF;
+		adj_hfp = HFP_HBP_DEF;
+		adj_hbp = HFP_HBP_DEF;
+		vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
+		if (hblanking < HBLANKING_MIN) {
+			delta_adj = HBLANKING_MIN - hblanking;
+			adj_clock = vref * delta_adj * adj->vtotal;
+			adj->clock += DIV_ROUND_UP(adj_clock, 1000);
+		} else {
+			delta_adj = hblanking - HBLANKING_MIN;
+			adj_clock = vref * delta_adj * adj->vtotal;
+			adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
+		}
+
+		DRM_WARN("illegal hblanking timing, use default.\n");
+		DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
+	} else if (adj_hfp < HP_MIN) {
+		/* Adjust hfp if hfp less than HP_MIN */
+		delta_adj = HP_MIN - adj_hfp;
+		adj_hfp = HP_MIN;
+
+		/*
+		 * Balance total HBlanking pixel, if HBP does not have enough
+		 * space, adjust HSYNC length, otherwise adjust HBP
+		 */
+		if ((adj_hbp - delta_adj) < HP_MIN)
+			/* HBP not enough space */
+			adj_hsync -= delta_adj;
+		else
+			adj_hbp -= delta_adj;
+	} else if (adj_hbp < HP_MIN) {
+		delta_adj = HP_MIN - adj_hbp;
+		adj_hbp = HP_MIN;
+
+		/*
+		 * Balance total HBlanking pixel, if HBP hasn't enough space,
+		 * adjust HSYNC length, otherwize adjust HBP
+		 */
+		if ((adj_hfp - delta_adj) < HP_MIN)
+			/* HFP not enough space */
+			adj_hsync -= delta_adj;
+		else
+			adj_hfp -= delta_adj;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
+	DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+			     adj_hsync, adj_hfp, adj_hbp, adj->clock);
+
+	/* Reconstruct timing */
+	adj->hsync_start = adj->hdisplay + adj_hfp;
+	adj->hsync_end = adj->hsync_start + adj_hsync;
+	adj->htotal = adj->hsync_end + adj_hbp;
+	DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+			     adj->hsync_start, adj->hsync_end, adj->htotal);
+
+	return true;
+}
+
+static int anx7625_bridge_atomic_check(struct drm_bridge *bridge,
+				       struct drm_bridge_state *bridge_state,
+				       struct drm_crtc_state *crtc_state,
+				       struct drm_connector_state *conn_state)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	dev_dbg(dev, "drm bridge atomic check\n");
+
+	anx7625_bridge_mode_fixup(bridge, &crtc_state->mode,
+				  &crtc_state->adjusted_mode);
+
+	return anx7625_connector_atomic_check(ctx, conn_state);
+}
+
+static void anx7625_bridge_atomic_enable(struct drm_bridge *bridge,
+					 struct drm_bridge_state *state)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+	struct drm_connector *connector;
+
+	dev_dbg(dev, "drm atomic enable\n");
+
+	if (!bridge->encoder) {
+		dev_err(dev, "Parent encoder object not found");
+		return;
+	}
+
+	connector = drm_atomic_get_new_connector_for_encoder(state->base.state,
+							     bridge->encoder);
+	if (!connector)
+		return;
+
+	ctx->connector = connector;
+
+	pm_runtime_get_sync(dev);
+	_anx7625_hpd_polling(ctx, 5000 * 100);
+
+	anx7625_dp_start(ctx);
+}
+
+static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge,
+					  struct drm_bridge_state *old)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	dev_dbg(dev, "drm atomic disable\n");
+
+	ctx->connector = NULL;
+	anx7625_dp_stop(ctx);
+
+	mutex_lock(&ctx->aux_lock);
+	pm_runtime_put_sync_suspend(dev);
+	mutex_unlock(&ctx->aux_lock);
+}
+
+static enum drm_connector_status
+anx7625_bridge_detect(struct drm_bridge *bridge)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm bridge detect\n");
+
+	return anx7625_sink_detect(ctx);
+}
+
+static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge,
+					    struct drm_connector *connector)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = ctx->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "drm bridge get edid\n");
+
+	return anx7625_get_edid(ctx);
+}
+
+static const struct drm_bridge_funcs anx7625_bridge_funcs = {
+	.attach = anx7625_bridge_attach,
+	.detach = anx7625_bridge_detach,
+	.mode_valid = anx7625_bridge_mode_valid,
+	.mode_set = anx7625_bridge_mode_set,
+	.atomic_check = anx7625_bridge_atomic_check,
+	.atomic_enable = anx7625_bridge_atomic_enable,
+	.atomic_disable = anx7625_bridge_atomic_disable,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.detect = anx7625_bridge_detect,
+	.get_edid = anx7625_bridge_get_edid,
+};
+
+static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
+					      struct i2c_client *client)
+{
+	struct device *dev = ctx->dev;
+
+	ctx->i2c.tx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  TX_P0_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.tx_p0_client))
+		return PTR_ERR(ctx->i2c.tx_p0_client);
+
+	ctx->i2c.tx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  TX_P1_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.tx_p1_client))
+		return PTR_ERR(ctx->i2c.tx_p1_client);
+
+	ctx->i2c.tx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  TX_P2_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.tx_p2_client))
+		return PTR_ERR(ctx->i2c.tx_p2_client);
+
+	ctx->i2c.rx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  RX_P0_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.rx_p0_client))
+		return PTR_ERR(ctx->i2c.rx_p0_client);
+
+	ctx->i2c.rx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  RX_P1_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.rx_p1_client))
+		return PTR_ERR(ctx->i2c.rx_p1_client);
+
+	ctx->i2c.rx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							  RX_P2_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.rx_p2_client))
+		return PTR_ERR(ctx->i2c.rx_p2_client);
+
+	ctx->i2c.tcpc_client = devm_i2c_new_dummy_device(dev, client->adapter,
+							 TCPC_INTERFACE_ADDR >> 1);
+	if (IS_ERR(ctx->i2c.tcpc_client))
+		return PTR_ERR(ctx->i2c.tcpc_client);
+
+	return 0;
+}
+
+static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	mutex_lock(&ctx->lock);
+
+	anx7625_stop_dp_work(ctx);
+	anx7625_power_standby(ctx);
+
+	mutex_unlock(&ctx->lock);
+
+	return 0;
+}
+
+static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	mutex_lock(&ctx->lock);
+
+	anx7625_power_on_init(ctx);
+
+	mutex_unlock(&ctx->lock);
+
+	return 0;
+}
+
+static const struct dev_pm_ops anx7625_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend,
+			   anx7625_runtime_pm_resume, NULL)
+};
+
+static void anx7625_runtime_disable(void *data)
+{
+	pm_runtime_dont_use_autosuspend(data);
+	pm_runtime_disable(data);
+}
+
+static int anx7625_link_bridge(struct drm_dp_aux *aux)
+{
+	struct anx7625_data *platform = container_of(aux, struct anx7625_data, aux);
+	struct device *dev = aux->dev;
+	int ret;
+
+	ret = anx7625_parse_dt_panel(dev, &platform->pdata);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "fail to parse DT for panel : %d\n", ret);
+		return ret;
+	}
+
+	platform->bridge.funcs = &anx7625_bridge_funcs;
+	platform->bridge.of_node = dev->of_node;
+	if (!anx7625_of_panel_on_aux_bus(dev))
+		platform->bridge.ops |= DRM_BRIDGE_OP_EDID;
+	if (!platform->pdata.panel_bridge)
+		platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
+					DRM_BRIDGE_OP_DETECT;
+	platform->bridge.type = platform->pdata.panel_bridge ?
+				    DRM_MODE_CONNECTOR_eDP :
+				    DRM_MODE_CONNECTOR_DisplayPort;
+
+	drm_bridge_add(&platform->bridge);
+
+	if (!platform->pdata.is_dpi) {
+		ret = anx7625_attach_dsi(platform);
+		if (ret)
+			drm_bridge_remove(&platform->bridge);
+	}
+
+	return ret;
+}
+
+static int anx7625_i2c_probe(struct i2c_client *client)
+{
+	struct anx7625_data *platform;
+	struct anx7625_platform_data *pdata;
+	int ret = 0;
+	struct device *dev = &client->dev;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_I2C_BLOCK)) {
+		DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
+		return -ENODEV;
+	}
+
+	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
+	if (!platform) {
+		DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
+		return -ENOMEM;
+	}
+
+	pdata = &platform->pdata;
+
+	platform->dev = &client->dev;
+	i2c_set_clientdata(client, platform);
+
+	pdata->supplies[0].supply = "vdd10";
+	pdata->supplies[1].supply = "vdd18";
+	pdata->supplies[2].supply = "vdd33";
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies),
+				      pdata->supplies);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret);
+		return ret;
+	}
+	anx7625_init_gpio(platform);
+
+	mutex_init(&platform->lock);
+	mutex_init(&platform->hdcp_wq_lock);
+	mutex_init(&platform->aux_lock);
+
+	INIT_DELAYED_WORK(&platform->hdcp_work, hdcp_check_work_func);
+	platform->hdcp_workqueue = create_workqueue("hdcp workqueue");
+	if (!platform->hdcp_workqueue) {
+		dev_err(dev, "fail to create work queue\n");
+		ret = -ENOMEM;
+		return ret;
+	}
+
+	platform->pdata.intp_irq = client->irq;
+	if (platform->pdata.intp_irq) {
+		INIT_WORK(&platform->work, anx7625_work_func);
+		platform->workqueue = alloc_workqueue("anx7625_work",
+						      WQ_FREEZABLE | WQ_MEM_RECLAIM, 1);
+		if (!platform->workqueue) {
+			DRM_DEV_ERROR(dev, "fail to create work queue\n");
+			ret = -ENOMEM;
+			goto free_hdcp_wq;
+		}
+
+		ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
+						NULL, anx7625_intr_hpd_isr,
+						IRQF_TRIGGER_FALLING |
+						IRQF_ONESHOT,
+						"anx7625-intp", platform);
+		if (ret) {
+			DRM_DEV_ERROR(dev, "fail to request irq\n");
+			goto free_wq;
+		}
+	}
+
+	platform->aux.name = "anx7625-aux";
+	platform->aux.dev = dev;
+	platform->aux.transfer = anx7625_aux_transfer;
+	platform->aux.wait_hpd_asserted = anx7625_wait_hpd_asserted;
+	drm_dp_aux_init(&platform->aux);
+
+	ret = anx7625_parse_dt(dev, pdata);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret);
+		goto free_wq;
+	}
+
+	if (!platform->pdata.is_dpi) {
+		ret = anx7625_setup_dsi_device(platform);
+		if (ret < 0)
+			goto free_wq;
+	}
+
+	/*
+	 * Registering the i2c devices will retrigger deferred probe, so it
+	 * needs to be done after calls that might return EPROBE_DEFER,
+	 * otherwise we can get an infinite loop.
+	 */
+	if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
+		ret = -ENOMEM;
+		DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
+		goto free_wq;
+	}
+
+	pm_runtime_enable(dev);
+	pm_runtime_set_autosuspend_delay(dev, 1000);
+	pm_runtime_use_autosuspend(dev);
+	pm_suspend_ignore_children(dev, true);
+	ret = devm_add_action_or_reset(dev, anx7625_runtime_disable, dev);
+	if (ret)
+		goto free_wq;
+
+	/*
+	 * Populating the aux bus will retrigger deferred probe, so it needs to
+	 * be done after calls that might return EPROBE_DEFER, otherwise we can
+	 * get an infinite loop.
+	 */
+	ret = devm_of_dp_aux_populate_bus(&platform->aux, anx7625_link_bridge);
+	if (ret) {
+		if (ret != -ENODEV) {
+			DRM_DEV_ERROR(dev, "failed to populate aux bus : %d\n", ret);
+			goto free_wq;
+		}
+
+		ret = anx7625_link_bridge(&platform->aux);
+		if (ret)
+			goto free_wq;
+	}
+
+	if (!platform->pdata.low_power_mode) {
+		anx7625_disable_pd_protocol(platform);
+		pm_runtime_get_sync(dev);
+		_anx7625_hpd_polling(platform, 5000 * 100);
+	}
+
+	/* Add work function */
+	if (platform->pdata.intp_irq)
+		queue_work(platform->workqueue, &platform->work);
+
+	if (platform->pdata.audio_en)
+		anx7625_register_audio(dev, platform);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
+
+	return 0;
+
+free_wq:
+	if (platform->workqueue)
+		destroy_workqueue(platform->workqueue);
+
+free_hdcp_wq:
+	if (platform->hdcp_workqueue)
+		destroy_workqueue(platform->hdcp_workqueue);
+
+	return ret;
+}
+
+static void anx7625_i2c_remove(struct i2c_client *client)
+{
+	struct anx7625_data *platform = i2c_get_clientdata(client);
+
+	drm_bridge_remove(&platform->bridge);
+
+	if (platform->pdata.intp_irq)
+		destroy_workqueue(platform->workqueue);
+
+	if (platform->hdcp_workqueue) {
+		cancel_delayed_work(&platform->hdcp_work);
+		flush_workqueue(platform->hdcp_workqueue);
+		destroy_workqueue(platform->hdcp_workqueue);
+	}
+
+	if (!platform->pdata.low_power_mode)
+		pm_runtime_put_sync_suspend(&client->dev);
+
+	if (platform->pdata.audio_en)
+		anx7625_unregister_audio(platform);
+}
+
+static const struct i2c_device_id anx7625_id[] = {
+	{"anx7625", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, anx7625_id);
+
+static const struct of_device_id anx_match_table[] = {
+	{.compatible = "analogix,anx7625",},
+	{},
+};
+MODULE_DEVICE_TABLE(of, anx_match_table);
+
+static struct i2c_driver anx7625_driver = {
+	.driver = {
+		.name = "anx7625",
+		.of_match_table = anx_match_table,
+		.pm = &anx7625_pm_ops,
+	},
+	.probe = anx7625_i2c_probe,
+	.remove = anx7625_i2c_remove,
+
+	.id_table = anx7625_id,
+};
+
+module_i2c_driver(anx7625_driver);
+
+MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
+MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(ANX7625_DRV_VERSION);
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
new file mode 100644
index 000000000..80d3fb4e9
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -0,0 +1,486 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+
+#ifndef __ANX7625_H__
+#define __ANX7625_H__
+
+#define ANX7625_DRV_VERSION "0.1.04"
+
+/* Loading OCM re-trying times */
+#define OCM_LOADING_TIME 10
+
+/*********  ANX7625 Register  **********/
+#define TX_P0_ADDR				0x70
+#define TX_P1_ADDR				0x7A
+#define TX_P2_ADDR				0x72
+
+#define RX_P0_ADDR				0x7e
+#define RX_P1_ADDR				0x84
+#define RX_P2_ADDR				0x54
+
+#define RSVD_00_ADDR				0x00
+#define RSVD_D1_ADDR				0xD1
+#define RSVD_60_ADDR				0x60
+#define RSVD_39_ADDR				0x39
+#define RSVD_7F_ADDR				0x7F
+
+#define TCPC_INTERFACE_ADDR			0x58
+
+/* Clock frequency in Hz */
+#define XTAL_FRQ        (27 * 1000000)
+
+#define  POST_DIVIDER_MIN	1
+#define  POST_DIVIDER_MAX	16
+#define  PLL_OUT_FREQ_MIN	520000000UL
+#define  PLL_OUT_FREQ_MAX	730000000UL
+#define  PLL_OUT_FREQ_ABS_MIN	300000000UL
+#define  PLL_OUT_FREQ_ABS_MAX	800000000UL
+#define  MAX_UNSIGNED_24BIT	16777215UL
+
+/***************************************************************/
+/* Register definition of device address 0x58 */
+
+#define PRODUCT_ID_L 0x02
+#define PRODUCT_ID_H 0x03
+
+#define INTR_ALERT_1  0xCC
+#define INTR_SOFTWARE_INT BIT(3)
+#define INTR_RECEIVED_MSG BIT(5)
+
+#define SYSTEM_STSTUS 0x45
+#define INTERFACE_CHANGE_INT 0x44
+#define HPD_STATUS_CHANGE 0x80
+#define HPD_STATUS 0x80
+
+/******** END of I2C Address 0x58 ********/
+
+/***************************************************************/
+/* Register definition of device address 0x70 */
+#define TX_HDCP_CTRL0			0x01
+#define STORE_AN			BIT(7)
+#define RX_REPEATER			BIT(6)
+#define RE_AUTHEN			BIT(5)
+#define SW_AUTH_OK			BIT(4)
+#define HARD_AUTH_EN			BIT(3)
+#define ENC_EN				BIT(2)
+#define BKSV_SRM_PASS			BIT(1)
+#define KSVLIST_VLD			BIT(0)
+
+#define SP_TX_WAIT_R0_TIME		0x40
+#define SP_TX_WAIT_KSVR_TIME		0x42
+#define SP_TX_SYS_CTRL1_REG		0x80
+#define HDCP2TX_FW_EN			BIT(4)
+
+#define SP_TX_LINK_BW_SET_REG		0xA0
+#define SP_TX_LANE_COUNT_SET_REG	0xA1
+
+#define M_VID_0 0xC0
+#define M_VID_1 0xC1
+#define M_VID_2 0xC2
+#define N_VID_0 0xC3
+#define N_VID_1 0xC4
+#define N_VID_2 0xC5
+
+#define KEY_START_ADDR			0x9000
+#define KEY_RESERVED			416
+
+#define HDCP14KEY_START_ADDR		(KEY_START_ADDR + KEY_RESERVED)
+#define HDCP14KEY_SIZE			624
+
+/***************************************************************/
+/* Register definition of device address 0x72 */
+#define AUX_RST	0x04
+#define RST_CTRL2 0x07
+
+#define SP_TX_TOTAL_LINE_STA_L 0x24
+#define SP_TX_TOTAL_LINE_STA_H 0x25
+#define SP_TX_ACT_LINE_STA_L 0x26
+#define SP_TX_ACT_LINE_STA_H 0x27
+#define SP_TX_V_F_PORCH_STA 0x28
+#define SP_TX_V_SYNC_STA 0x29
+#define SP_TX_V_B_PORCH_STA 0x2A
+#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
+#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
+#define SP_TX_ACT_PIXEL_STA_L 0x2D
+#define SP_TX_ACT_PIXEL_STA_H 0x2E
+#define SP_TX_H_F_PORCH_STA_L 0x2F
+#define SP_TX_H_F_PORCH_STA_H 0x30
+#define SP_TX_H_SYNC_STA_L 0x31
+#define SP_TX_H_SYNC_STA_H 0x32
+#define SP_TX_H_B_PORCH_STA_L 0x33
+#define SP_TX_H_B_PORCH_STA_H 0x34
+
+#define SP_TX_VID_CTRL 0x84
+#define SP_TX_BPC_MASK 0xE0
+#define SP_TX_BPC_6    0x00
+#define SP_TX_BPC_8    0x20
+#define SP_TX_BPC_10   0x40
+#define SP_TX_BPC_12   0x60
+
+#define VIDEO_BIT_MATRIX_12 0x4c
+
+#define AUDIO_CHANNEL_STATUS_1 0xd0
+#define AUDIO_CHANNEL_STATUS_2 0xd1
+#define AUDIO_CHANNEL_STATUS_3 0xd2
+#define AUDIO_CHANNEL_STATUS_4 0xd3
+#define AUDIO_CHANNEL_STATUS_5 0xd4
+#define AUDIO_CHANNEL_STATUS_6 0xd5
+#define TDM_SLAVE_MODE 0x10
+#define I2S_SLAVE_MODE 0x08
+#define AUDIO_LAYOUT   0x01
+
+#define HPD_DET_TIMER_BIT0_7   0xea
+#define HPD_DET_TIMER_BIT8_15  0xeb
+#define HPD_DET_TIMER_BIT16_23 0xec
+/* HPD debounce time 2ms for 27M clock */
+#define HPD_TIME               54000
+
+#define AUDIO_CONTROL_REGISTER 0xe6
+#define TDM_TIMING_MODE 0x08
+
+#define I2C_ADDR_72_DPTX              0x72
+
+#define HP_MIN			8
+#define HBLANKING_MIN		80
+#define SYNC_LEN_DEF		32
+#define HFP_HBP_DEF		((HBLANKING_MIN - SYNC_LEN_DEF) / 2)
+#define VIDEO_CONTROL_0	0x08
+
+#define  ACTIVE_LINES_L         0x14
+#define  ACTIVE_LINES_H         0x15  /* Bit[7:6] are reserved */
+#define  VERTICAL_FRONT_PORCH   0x16
+#define  VERTICAL_SYNC_WIDTH    0x17
+#define  VERTICAL_BACK_PORCH    0x18
+
+#define  HORIZONTAL_TOTAL_PIXELS_L    0x19
+#define  HORIZONTAL_TOTAL_PIXELS_H    0x1A  /* Bit[7:6] are reserved */
+#define  HORIZONTAL_ACTIVE_PIXELS_L   0x1B
+#define  HORIZONTAL_ACTIVE_PIXELS_H   0x1C  /* Bit[7:6] are reserved */
+#define  HORIZONTAL_FRONT_PORCH_L     0x1D
+#define  HORIZONTAL_FRONT_PORCH_H     0x1E  /* Bit[7:4] are reserved */
+#define  HORIZONTAL_SYNC_WIDTH_L      0x1F
+#define  HORIZONTAL_SYNC_WIDTH_H      0x20  /* Bit[7:4] are reserved */
+#define  HORIZONTAL_BACK_PORCH_L      0x21
+#define  HORIZONTAL_BACK_PORCH_H      0x22  /* Bit[7:4] are reserved */
+
+/******** END of I2C Address 0x72 *********/
+
+/***************************************************************/
+/* Register definition of device address 0x7a */
+#define DP_TX_SWING_REG_CNT		0x14
+#define DP_TX_LANE0_SWING_REG0		0x00
+#define DP_TX_LANE1_SWING_REG0		0x14
+/******** END of I2C Address 0x7a *********/
+
+/***************************************************************/
+/* Register definition of device address 0x7e */
+
+#define  I2C_ADDR_7E_FLASH_CONTROLLER  0x7E
+
+#define R_BOOT_RETRY		0x00
+#define R_RAM_ADDR_H		0x01
+#define R_RAM_ADDR_L		0x02
+#define R_RAM_LEN_H		0x03
+#define R_RAM_LEN_L		0x04
+#define FLASH_LOAD_STA          0x05
+#define FLASH_LOAD_STA_CHK	BIT(7)
+
+#define R_RAM_CTRL              0x05
+/* bit positions */
+#define FLASH_DONE              BIT(7)
+#define BOOT_LOAD_DONE          BIT(6)
+#define CRC_OK                  BIT(5)
+#define LOAD_DONE               BIT(4)
+#define O_RW_DONE               BIT(3)
+#define FUSE_BUSY               BIT(2)
+#define DECRYPT_EN              BIT(1)
+#define LOAD_START              BIT(0)
+
+#define FLASH_ADDR_HIGH         0x0F
+#define FLASH_ADDR_LOW          0x10
+#define FLASH_LEN_HIGH          0x31
+#define FLASH_LEN_LOW           0x32
+#define R_FLASH_RW_CTRL         0x33
+/* bit positions */
+#define READ_DELAY_SELECT       BIT(7)
+#define GENERAL_INSTRUCTION_EN  BIT(6)
+#define FLASH_ERASE_EN          BIT(5)
+#define RDID_READ_EN            BIT(4)
+#define REMS_READ_EN            BIT(3)
+#define WRITE_STATUS_EN         BIT(2)
+#define FLASH_READ              BIT(1)
+#define FLASH_WRITE             BIT(0)
+
+#define FLASH_BUF_BASE_ADDR     0x60
+#define FLASH_BUF_LEN           0x20
+
+#define  XTAL_FRQ_SEL    0x3F
+/* bit field positions */
+#define  XTAL_FRQ_SEL_POS    5
+/* bit field values */
+#define  XTAL_FRQ_19M2   (0 << XTAL_FRQ_SEL_POS)
+#define  XTAL_FRQ_27M    (4 << XTAL_FRQ_SEL_POS)
+
+#define  R_DSC_CTRL_0    0x40
+#define  READ_STATUS_EN  7
+#define  CLK_1MEG_RB     6  /* 1MHz clock reset; 0=reset, 0=reset release */
+#define  DSC_BIST_DONE   1  /* Bit[5:1]: 1=DSC MBIST pass */
+#define  DSC_EN          0x01  /* 1=DSC enabled, 0=DSC disabled */
+
+#define OCM_FW_VERSION   0x31
+#define OCM_FW_REVERSION 0x32
+
+#define AP_AUX_ADDR_7_0   0x11
+#define AP_AUX_ADDR_15_8  0x12
+#define AP_AUX_ADDR_19_16 0x13
+
+/* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
+#define AP_AUX_CTRL_STATUS 0x14
+#define AP_AUX_CTRL_OP_EN 0x10
+#define AP_AUX_CTRL_ADDRONLY 0x20
+
+#define AP_AUX_BUFF_START 0x15
+#define PIXEL_CLOCK_L	0x25
+#define PIXEL_CLOCK_H	0x26
+
+#define AP_AUX_COMMAND	0x27  /* com+len */
+#define LENGTH_SHIFT	4
+#define DPCD_CMD(len, cmd)	((((len) - 1) << LENGTH_SHIFT) | (cmd))
+
+/* Bit 0&1: 3D video structure */
+/* 0x01: frame packing,  0x02:Line alternative, 0x03:Side-by-side(full) */
+#define AP_AV_STATUS 0x28
+#define AP_VIDEO_CHG  BIT(2)
+#define AP_AUDIO_CHG  BIT(3)
+#define AP_MIPI_MUTE  BIT(4) /* 1:MIPI input mute, 0: ummute */
+#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in  0: no RX in */
+#define AP_DISABLE_PD BIT(6)
+#define AP_DISABLE_DISPLAY BIT(7)
+/***************************************************************/
+/* Register definition of device address 0x84 */
+#define  MIPI_PHY_CONTROL_3            0x03
+#define  MIPI_HS_PWD_CLK               7
+#define  MIPI_HS_RT_CLK                6
+#define  MIPI_PD_CLK                   5
+#define  MIPI_CLK_RT_MANUAL_PD_EN      4
+#define  MIPI_CLK_HS_MANUAL_PD_EN      3
+#define  MIPI_CLK_DET_DET_BYPASS       2
+#define  MIPI_CLK_MISS_CTRL            1
+#define  MIPI_PD_LPTX_CH_MANUAL_PD_EN  0
+
+#define  MIPI_LANE_CTRL_0		0x05
+#define  MIPI_TIME_HS_PRPR		0x08
+
+/*
+ * After MIPI RX protocol layer received video frames,
+ * Protocol layer starts to reconstruct video stream from PHY
+ */
+#define  MIPI_VIDEO_STABLE_CNT           0x0A
+
+#define  MIPI_LANE_CTRL_10               0x0F
+#define  MIPI_DIGITAL_ADJ_1     0x1B
+#define  IVO_MID0               0x26
+#define  IVO_MID1               0xCF
+
+#define  MIPI_PLL_M_NUM_23_16   0x1E
+#define  MIPI_PLL_M_NUM_15_8    0x1F
+#define  MIPI_PLL_M_NUM_7_0     0x20
+#define  MIPI_PLL_N_NUM_23_16   0x21
+#define  MIPI_PLL_N_NUM_15_8    0x22
+#define  MIPI_PLL_N_NUM_7_0     0x23
+
+#define  MIPI_DIGITAL_PLL_6     0x2A
+/* Bit[7:6]: VCO band control, only effective */
+#define  MIPI_M_NUM_READY        0x10
+#define  MIPI_N_NUM_READY        0x08
+#define  STABLE_INTEGER_CNT_EN   0x04
+#define  MIPI_PLL_TEST_BIT       0
+/* Bit[1:0]: test point output select - */
+/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
+
+#define  MIPI_DIGITAL_PLL_7      0x2B
+#define  MIPI_PLL_FORCE_N_EN     7
+#define  MIPI_PLL_FORCE_BAND_EN  6
+
+#define  MIPI_PLL_VCO_TUNE_REG   4
+/* Bit[5:4]: VCO metal capacitance - */
+/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
+#define  MIPI_PLL_VCO_TUNE_REG_VAL   0x30
+
+#define  MIPI_PLL_PLL_LDO_BIT    2
+/* Bit[3:2]: vco_v2i power - */
+/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
+#define  MIPI_PLL_RESET_N        0x02
+#define  MIPI_FRQ_FORCE_NDET     0
+
+#define  MIPI_ALERT_CLR_0        0x2D
+#define  HS_link_error_clear     7
+/* This bit itself is S/C, and it clears 0x84:0x31[7] */
+
+#define  MIPI_ALERT_OUT_0        0x31
+#define  check_sum_err_hs_sync   7
+/* This bit is cleared by 0x84:0x2D[7] */
+
+#define  MIPI_DIGITAL_PLL_8    0x33
+#define  MIPI_POST_DIV_VAL     4
+/* N means divided by (n+1), n = 0~15 */
+#define  MIPI_EN_LOCK_FRZ      3
+#define  MIPI_FRQ_COUNTER_RST  2
+#define  MIPI_FRQ_SET_REG_8    1
+/* Bit 0 is reserved */
+
+#define  MIPI_DIGITAL_PLL_9    0x34
+
+#define  MIPI_DIGITAL_PLL_16   0x3B
+#define  MIPI_FRQ_FREEZE_NDET          7
+#define  MIPI_FRQ_REG_SET_ENABLE       6
+#define  MIPI_REG_FORCE_SEL_EN         5
+#define  MIPI_REG_SEL_DIV_REG          4
+#define  MIPI_REG_FORCE_PRE_DIV_EN     3
+/* Bit 2 is reserved */
+#define  MIPI_FREF_D_IND               1
+#define  REF_CLK_27000KHZ    1
+#define  REF_CLK_19200KHZ    0
+#define  MIPI_REG_PLL_PLL_TEST_ENABLE  0
+
+#define  MIPI_DIGITAL_PLL_18  0x3D
+#define  FRQ_COUNT_RB_SEL       7
+#define  REG_FORCE_POST_DIV_EN  6
+#define  MIPI_DPI_SELECT        5
+#define  SELECT_DSI  1
+#define  SELECT_DPI  0
+#define  REG_BAUD_DIV_RATIO     0
+
+#define  H_BLANK_L            0x3E
+/* For DSC only */
+#define  H_BLANK_H            0x3F
+/* For DSC only; note: bit[7:6] are reserved */
+#define  MIPI_SWAP  0x4A
+#define  MIPI_SWAP_CH0    7
+#define  MIPI_SWAP_CH1    6
+#define  MIPI_SWAP_CH2    5
+#define  MIPI_SWAP_CH3    4
+#define  MIPI_SWAP_CLK    3
+/* Bit[2:0] are reserved */
+
+/******** END of I2C Address 0x84 *********/
+
+/* DPCD regs */
+#define DPCD_DPCD_REV                  0x00
+#define DPCD_MAX_LINK_RATE             0x01
+#define DPCD_MAX_LANE_COUNT            0x02
+
+/*********  ANX7625 Register End  **********/
+
+/***************** Display *****************/
+enum audio_fs {
+	AUDIO_FS_441K  = 0x00,
+	AUDIO_FS_48K   = 0x02,
+	AUDIO_FS_32K   = 0x03,
+	AUDIO_FS_882K  = 0x08,
+	AUDIO_FS_96K   = 0x0a,
+	AUDIO_FS_1764K = 0x0c,
+	AUDIO_FS_192K  = 0x0e
+};
+
+enum audio_wd_len {
+	AUDIO_W_LEN_16_20MAX = 0x02,
+	AUDIO_W_LEN_18_20MAX = 0x04,
+	AUDIO_W_LEN_17_20MAX = 0x0c,
+	AUDIO_W_LEN_19_20MAX = 0x08,
+	AUDIO_W_LEN_20_20MAX = 0x0a,
+	AUDIO_W_LEN_20_24MAX = 0x03,
+	AUDIO_W_LEN_22_24MAX = 0x05,
+	AUDIO_W_LEN_21_24MAX = 0x0d,
+	AUDIO_W_LEN_23_24MAX = 0x09,
+	AUDIO_W_LEN_24_24MAX = 0x0b
+};
+
+#define I2S_CH_2	0x01
+#define TDM_CH_4	0x03
+#define TDM_CH_6	0x05
+#define TDM_CH_8	0x07
+
+#define MAX_DPCD_BUFFER_SIZE	16
+
+#define ONE_BLOCK_SIZE      128
+#define FOUR_BLOCK_SIZE     (128 * 4)
+
+#define MAX_EDID_BLOCK	3
+#define EDID_TRY_CNT	3
+#define SUPPORT_PIXEL_CLOCK	300000
+
+struct s_edid_data {
+	int edid_block_num;
+	u8 edid_raw_data[FOUR_BLOCK_SIZE];
+};
+
+/***************** Display End *****************/
+
+#define MAX_LANES_SUPPORT	4
+
+struct anx7625_platform_data {
+	struct gpio_desc *gpio_p_on;
+	struct gpio_desc *gpio_reset;
+	struct regulator_bulk_data supplies[3];
+	struct drm_bridge *panel_bridge;
+	int intp_irq;
+	int is_dpi;
+	int mipi_lanes;
+	int audio_en;
+	int dp_lane0_swing_reg_cnt;
+	u8 lane0_reg_data[DP_TX_SWING_REG_CNT];
+	int dp_lane1_swing_reg_cnt;
+	u8 lane1_reg_data[DP_TX_SWING_REG_CNT];
+	u32 low_power_mode;
+	struct device_node *mipi_host_node;
+};
+
+struct anx7625_i2c_client {
+	struct i2c_client *tx_p0_client;
+	struct i2c_client *tx_p1_client;
+	struct i2c_client *tx_p2_client;
+	struct i2c_client *rx_p0_client;
+	struct i2c_client *rx_p1_client;
+	struct i2c_client *rx_p2_client;
+	struct i2c_client *tcpc_client;
+};
+
+struct anx7625_data {
+	struct anx7625_platform_data pdata;
+	struct platform_device *audio_pdev;
+	int hpd_status;
+	int hpd_high_cnt;
+	int dp_en;
+	int hdcp_cp;
+	/* Lock for work queue */
+	struct mutex lock;
+	struct device *dev;
+	struct anx7625_i2c_client i2c;
+	struct i2c_client *last_client;
+	struct timer_list hdcp_timer;
+	struct s_edid_data slimport_edid_p;
+	struct device *codec_dev;
+	hdmi_codec_plugged_cb plugged_cb;
+	struct work_struct work;
+	struct workqueue_struct *workqueue;
+	struct delayed_work hdcp_work;
+	struct workqueue_struct *hdcp_workqueue;
+	/* Lock for hdcp work queue */
+	struct mutex hdcp_wq_lock;
+	/* Lock for aux transfer and disable */
+	struct mutex aux_lock;
+	char edid_block;
+	struct display_timing dt;
+	u8 display_timing_valid;
+	struct drm_bridge bridge;
+	u8 bridge_attached;
+	struct drm_connector *connector;
+	struct mipi_dsi_device *dsi;
+	struct drm_dp_aux aux;
+};
+
+#endif  /* __ANX7625_H__ */