[PATCH v3 0/3] Add MIPI rx DPI support

[PATCH v3 0/3] Add MIPI rx DPI support

[Xin Ji]

Hi all, this patch series implement MIPI rx DPI feature. Please help to review.

This is the v3 version, any mistakes, please let me know,
I'll fix it in the next series.

Change history:
v3: Fix Rob Herring, Dan Carpenter, Nicolas comments
 - Split the patch, fix not correct return data
 - Fix several coding format
 - Split DP tx swing register setting to two property
 - Add HDCP support vender flag
 - remove 'analogix,swing-setting' and 'analogix,mipi-dpi-in' property

v2: Fix Rob Herring comment
 - Fix yamllint warnings/errors in analogix,anx7625.yaml
 - Fix kernel robot compile warning

v1: initial MIPI rx DPI feature support


Xin Ji (3):
  dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg
  drm/bridge: anx7625: fix not correct return value
  drm/bridge: anx7625: add MIPI DPI input feature support

 .../bindings/display/bridge/analogix,anx7625.yaml  |  57 +++-
 drivers/gpu/drm/bridge/analogix/anx7625.c          | 330 +++++++++++++++++----
 drivers/gpu/drm/bridge/analogix/anx7625.h          |  20 +-
 3 files changed, 341 insertions(+), 66 deletions(-)

-- 
2.7.4

[PATCH v3 1/3] dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg

[Xin Ji]

Add 'bus-type' and 'data-lanes' define for port0, add HDCP support
flag and DP tx lane0 and lane1 swing register array define.

Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 .../bindings/display/bridge/analogix,anx7625.yaml  | 57 ++++++++++++++++++++--
 1 file changed, 54 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
index 60585a4..3b1cbe0 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
@@ -34,23 +34,69 @@ properties:
     description: used for reset chip control, RESET_N pin B7.
     maxItems: 1
 
+  analogix,lane0-swing:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      an array of swing register setting for DP tx lane0 PHY, please don't
+      add this property, or contact vendor.
+
+  analogix,lane1-swing:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      an array of swing register setting for DP tx lane1 PHY, please don't
+      add this property, or contact vendor.
+
+  analogix,hdcp-support:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: indicate the DP tx HDCP support or not.
+
   ports:
     type: object
+    additionalProperties: false
 
     properties:
       port@0:
         type: object
         description:
-          Video port for MIPI DSI input.
+          Video port for MIPI input.
+
+        properties:
+          endpoint:
+            type: object
+            additionalProperties: false
+
+            # Properties described in
+            # Documentation/devicetree/bindings/media/video-interfaces.txt
+            properties:
+              remote-endpoint: true
+              bus-type: true
+              data-lanes: true
+
+            required:
+              - remote-endpoint
+
+        required:
+          - endpoint
 
       port@1:
         type: object
         description:
           Video port for panel or connector.
 
+        properties:
+          endpoint:
+            type: object
+            additionalProperties: false
+
+            required:
+              - remote-endpoint
+
+        required:
+          - endpoint
+
     required:
-        - port@0
-        - port@1
+      - port@0
+      - port@1
 
 required:
   - compatible
@@ -73,6 +119,10 @@ examples:
             enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
             reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
 
+            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
+            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
+            analogix,hdcp-support = <0>;
+
             ports {
                 #address-cells = <1>;
                 #size-cells = <0>;
@@ -81,6 +131,7 @@ examples:
                     reg = <0>;
                     anx7625_in: endpoint {
                         remote-endpoint = <&mipi_dsi>;
+                        bus-type = <5>;
                     };
                 };
 
-- 
2.7.4

[PATCH v3 2/3] drm/bridge: anx7625: fix not correct return value

[Xin Ji]

At some time, the original code may return non zero value, force return 0
if operation finished

Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 65cc059..04536cc 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -189,10 +189,10 @@ static int wait_aux_op_finish(struct anx7625_data *ctx)
 			       AP_AUX_CTRL_STATUS);
 	if (val < 0 || (val & 0x0F)) {
 		DRM_DEV_ERROR(dev, "aux status %02x\n", val);
-		val = -EIO;
+		return -EIO;
 	}
 
-	return val;
+	return 0;
 }
 
 static int anx7625_video_mute_control(struct anx7625_data *ctx,
-- 
2.7.4

[PATCH v3 3/3] drm/bridge: anx7625: add MIPI DPI input feature support

[Xin Ji]

Add MIPI rx DPI input support

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 326 ++++++++++++++++++++++++------
 drivers/gpu/drm/bridge/analogix/anx7625.h |  20 +-
 2 files changed, 285 insertions(+), 61 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 04536cc..c7fc92b 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -150,18 +150,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
 	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)
+static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
 {
-	int val;
+	int i, ret;
 
-	val = anx7625_reg_read(ctx, client, offset);
-	if (val < 0)
-		return val;
+	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 anx7625_reg_write(ctx, client,
-				 offset, (val & and_mask) | (or_mask));
+	return ret;
 }
 
 static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
@@ -195,6 +195,60 @@ static int wait_aux_op_finish(struct anx7625_data *ctx)
 	return 0;
 }
 
+static int anx7625_aux_dpcd_read(struct anx7625_data *ctx,
+				 u8 addrh, u8 addrm, u8 addrl,
+				 u8 len, u8 *buf)
+{
+	struct device *dev = &ctx->client->dev;
+	int ret;
+	u8 cmd;
+
+	if (len > MAX_DPCD_BUFFER_SIZE) {
+		DRM_DEV_ERROR(dev, "exceed aux buffer len.\n");
+		return -EINVAL;
+	}
+
+	cmd = ((len - 1) << 4) | 0x09;
+
+	/* 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_write_and(ctx, ctx->i2c.rx_p0_client,
+				 AP_AUX_ADDR_19_16, addrh);
+
+	/* 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) {
+		DRM_DEV_ERROR(dev, "cannot access aux related register.\n");
+		return -EIO;
+	}
+
+	usleep_range(2000, 2100);
+
+	ret = wait_aux_op_finish(ctx);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "aux IO error: wait aux op finish.\n");
+		return ret;
+	}
+
+	ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+				     AP_AUX_BUFF_START, len, buf);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "read dpcd register failed\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
 static int anx7625_video_mute_control(struct anx7625_data *ctx,
 				      u8 status)
 {
@@ -219,38 +273,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
 	return ret;
 }
 
-static int anx7625_config_audio_input(struct anx7625_data *ctx)
-{
-	struct device *dev = &ctx->client->dev;
-	int ret;
-
-	/* Channel num */
-	ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
-				AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
-
-	/* FS */
-	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
-				    AUDIO_CHANNEL_STATUS_4,
-				    0xf0, AUDIO_FS_48K);
-	/* Word length */
-	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
-				    AUDIO_CHANNEL_STATUS_5,
-				    0xf0, AUDIO_W_LEN_24_24MAX);
-	/* I2S */
-	ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
-				AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
-	ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
-				 AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
-	/* Audio change flag */
-	ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
-				AP_AV_STATUS, AP_AUDIO_CHG);
-
-	if (ret < 0)
-		DRM_DEV_ERROR(dev, "fail to config audio.\n");
-
-	return ret;
-}
-
 /* Reduction of fraction a/b */
 static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
 {
@@ -410,7 +432,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
 	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, 3);
+				MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
 
 	/* Htotal */
 	htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
@@ -595,6 +617,101 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
 	return ret;
 }
 
+static int anx7625_api_dpi_config(struct anx7625_data *ctx)
+{
+	struct device *dev = &ctx->client->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->client->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_hdcp_setting(struct anx7625_data *ctx)
+{
+	u8 bcap;
+	struct device *dev = &ctx->client->dev;
+
+	if (!ctx->pdata.hdcp_support || !ctx->hdcp_en) {
+		DRM_DEV_DEBUG_DRIVER(dev, "hdcp_support(%d), hdcp_en(%d)\n",
+				     ctx->pdata.hdcp_support, ctx->hdcp_en);
+		DRM_DEV_DEBUG_DRIVER(dev, "disable HDCP by config\n");
+		return anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+					 0xee, 0x9f);
+	}
+
+	anx7625_aux_dpcd_read(ctx, 0x06, 0x80, 0x28, 1, &bcap);
+	if (!(bcap & 0x01)) {
+		DRM_WARN("downstream not support HDCP 1.4, cap(%x).\n", bcap);
+		return anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+					 0xee, 0x9f);
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "enable HDCP 1.4\n");
+
+	return anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xee, 0x20);
+}
+
 static void anx7625_dp_start(struct anx7625_data *ctx)
 {
 	int ret;
@@ -605,9 +722,13 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
 		return;
 	}
 
-	anx7625_config_audio_input(ctx);
+	/* HDCP config */
+	anx7625_hdcp_setting(ctx);
 
-	ret = anx7625_dsi_config(ctx);
+	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");
@@ -688,8 +809,7 @@ static int sp_tx_get_edid_block(struct anx7625_data *ctx)
 	return c;
 }
 
-static int edid_read(struct anx7625_data *ctx,
-		     u8 offset, u8 *pblock_buf)
+static int edid_read(struct anx7625_data *ctx, u8 offset, u8 *pblock_buf)
 {
 	int ret, cnt;
 	struct device *dev = &ctx->client->dev;
@@ -992,8 +1112,9 @@ static void anx7625_chip_control(struct anx7625_data *ctx, int state)
 
 	if (state) {
 		atomic_inc(&ctx->power_status);
-		if (atomic_read(&ctx->power_status) == 1)
+		if (atomic_read(&ctx->power_status) == 1) {
 			anx7625_power_on_init(ctx);
+		}
 	} else {
 		if (atomic_read(&ctx->power_status)) {
 			atomic_dec(&ctx->power_status);
@@ -1051,6 +1172,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
 		return;
 	}
 
+	ctx->hpd_status = 1;
 	ctx->hpd_high_cnt++;
 
 	/* Not support HDCP */
@@ -1060,8 +1182,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
 	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)
+	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)
@@ -1080,6 +1204,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
 	int ret, val;
 	struct device *dev = &ctx->client->dev;
 
+	/* Interrupt mode, no need poll HPD status, just return */
+	if (ctx->pdata.intp_irq)
+		return;
+
 	if (atomic_read(&ctx->power_status) != 1) {
 		DRM_DEV_DEBUG_DRIVER(dev, "No need to poling HPD status.\n");
 		return;
@@ -1130,6 +1258,21 @@ 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] & 0xFF);
+
+	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] & 0xFF);
+}
+
 static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
 {
 	struct device *dev = &ctx->client->dev;
@@ -1145,9 +1288,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
 	} else {
 		DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
 		anx7625_start_dp_work(ctx);
+		anx7625_dp_adjust_swing(ctx);
 	}
-
-	ctx->hpd_status = 1;
 }
 
 static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
@@ -1224,20 +1366,69 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
 	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_u32_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_u32_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;
 	struct drm_panel *panel;
 	int ret;
+	int bus_type;
 
+	anx7625_get_swing_setting(dev, pdata);
+
+	pdata->is_dpi = 1; /* default dpi mode */
 	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;
 	}
 
-	DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
+	of_property_read_u32(pdata->mipi_host_node, "bus-type", &bus_type);
+	if (bus_type == 5) /* bus type is Parallel(DSI) */
+		pdata->is_dpi = 0;
+
+	pdata->mipi_lanes = of_property_count_u32_elems(pdata->mipi_host_node,
+							"data-lanes");
+	if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes < 0)
+		pdata->mipi_lanes = MAX_LANES_SUPPORT;
+
+	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");
+
+	ret = of_property_read_u32(np, "analogix,hdcp-support",
+				   &pdata->hdcp_support);
+	if (ret)
+		pdata->hdcp_support = 0;
 
 	ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
 	if (ret < 0) {
@@ -1300,9 +1491,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
 {
 	struct device *dev = &ctx->client->dev;
 
-	DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
+	DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
+
+	if (ctx->pdata.panel_bridge)
+		return connector_status_connected;
 
-	return connector_status_connected;
+	return ctx->hpd_status ? connector_status_connected :
+				     connector_status_disconnected;
 }
 
 static int anx7625_attach_dsi(struct anx7625_data *ctx)
@@ -1330,7 +1525,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
 		return -EINVAL;
 	}
 
-	dsi->lanes = 4;
+	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	|
@@ -1376,10 +1571,12 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge,
 		return -ENODEV;
 	}
 
-	err = anx7625_attach_dsi(ctx);
-	if (err) {
-		DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
-		return err;
+	if (!ctx->pdata.is_dpi) {
+		err = anx7625_attach_dsi(ctx);
+		if (err) {
+			DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
+			return err;
+		}
 	}
 
 	if (ctx->pdata.panel_bridge) {
@@ -1478,6 +1675,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
 
 	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;
@@ -1786,8 +1987,13 @@ static int anx7625_i2c_probe(struct i2c_client *client,
 
 	platform->bridge.funcs = &anx7625_bridge_funcs;
 	platform->bridge.of_node = client->dev.of_node;
-	platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
-	platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
+	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);
 
 	DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
index 193ad86..127081e 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.h
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -141,12 +141,20 @@
 #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 FLASH_LOAD_STA 0x05
+#define FLASH_LOAD_STA          0x05
 #define FLASH_LOAD_STA_CHK	BIT(7)
 
 #define  XTAL_FRQ_SEL    0x3F
@@ -347,11 +355,20 @@ struct s_edid_data {
 
 /***************** Display End *****************/
 
+#define MAX_LANES_SUPPORT	4
+
 struct anx7625_platform_data {
 	struct gpio_desc *gpio_p_on;
 	struct gpio_desc *gpio_reset;
 	struct drm_bridge *panel_bridge;
 	int intp_irq;
+	int is_dpi;
+	int mipi_lanes;
+	int hdcp_support;
+	int dp_lane0_swing_reg_cnt;
+	int lane0_reg_data[DP_TX_SWING_REG_CNT];
+	int dp_lane1_swing_reg_cnt;
+	int lane1_reg_data[DP_TX_SWING_REG_CNT];
 	u32 low_power_mode;
 	struct device_node *mipi_host_node;
 };
@@ -371,6 +388,7 @@ struct anx7625_data {
 	atomic_t power_status;
 	int hpd_status;
 	int hpd_high_cnt;
+	int hdcp_en;
 	/* Lock for work queue */
 	struct mutex lock;
 	struct i2c_client *client;
-- 
2.7.4

Re: [PATCH v3 1/3] dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg

[Rob Herring]

On Mon, 25 Jan 2021 19:12:21 +0800, Xin Ji wrote:
> Add 'bus-type' and 'data-lanes' define for port0, add HDCP support
> flag and DP tx lane0 and lane1 swing register array define.
> 
> Signed-off-by: Xin Ji <xji@analogixsemi.com>
> ---
>  .../bindings/display/bridge/analogix,anx7625.yaml  | 57 ++++++++++++++++++++--
>  1 file changed, 54 insertions(+), 3 deletions(-)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: encoder@58: ports: '#address-cells', '#size-cells' do not match any of the regexes: 'pinctrl-[0-9]+'
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: encoder@58: ports:port@1:endpoint: Additional properties are not allowed ('remote-endpoint' was unexpected)
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

See https://patchwork.ozlabs.org/patch/1431199

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

Re: [PATCH v3 1/3] dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg

[Rob Herring]

On Mon, Jan 25, 2021 at 07:12:21PM +0800, Xin Ji wrote:
> Add 'bus-type' and 'data-lanes' define for port0, add HDCP support
> flag and DP tx lane0 and lane1 swing register array define.
> 
> Signed-off-by: Xin Ji <xji@analogixsemi.com>
> ---
>  .../bindings/display/bridge/analogix,anx7625.yaml  | 57 ++++++++++++++++++++--
>  1 file changed, 54 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> index 60585a4..3b1cbe0 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> @@ -34,23 +34,69 @@ properties:
>      description: used for reset chip control, RESET_N pin B7.
>      maxItems: 1
>  
> +  analogix,lane0-swing:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description:
> +      an array of swing register setting for DP tx lane0 PHY, please don't
> +      add this property, or contact vendor.
> +
> +  analogix,lane1-swing:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description:
> +      an array of swing register setting for DP tx lane1 PHY, please don't
> +      add this property, or contact vendor.
> +
> +  analogix,hdcp-support:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: indicate the DP tx HDCP support or not.

Sounds like a boolean.

> +
>    ports:
>      type: object
> +    additionalProperties: false
>  
>      properties:
>        port@0:
>          type: object
>          description:
> -          Video port for MIPI DSI input.
> +          Video port for MIPI input.

You're going to need to rebase this one drm-misc-next which uses the 
graph schema now.

> +
> +        properties:
> +          endpoint:
> +            type: object
> +            additionalProperties: false
> +
> +            # Properties described in
> +            # Documentation/devicetree/bindings/media/video-interfaces.txt
> +            properties:
> +              remote-endpoint: true
> +              bus-type: true
> +              data-lanes: true
> +
> +            required:
> +              - remote-endpoint
> +
> +        required:
> +          - endpoint
>  
>        port@1:
>          type: object
>          description:
>            Video port for panel or connector.
>  
> +        properties:
> +          endpoint:
> +            type: object
> +            additionalProperties: false
> +
> +            required:
> +              - remote-endpoint
> +
> +        required:
> +          - endpoint
> +
>      required:
> -        - port@0
> -        - port@1
> +      - port@0
> +      - port@1
>  
>  required:
>    - compatible
> @@ -73,6 +119,10 @@ examples:
>              enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
>              reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
>  
> +            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> +            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> +            analogix,hdcp-support = <0>;
> +
>              ports {
>                  #address-cells = <1>;
>                  #size-cells = <0>;
> @@ -81,6 +131,7 @@ examples:
>                      reg = <0>;
>                      anx7625_in: endpoint {
>                          remote-endpoint = <&mipi_dsi>;
> +                        bus-type = <5>;
>                      };
>                  };
>  
> -- 
> 2.7.4
> 

Re: [PATCH v3 1/3] dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg

[Xin Ji]

On Mon, Jan 25, 2021 at 08:51:35AM -0600, Rob Herring wrote:
> On Mon, 25 Jan 2021 19:12:21 +0800, Xin Ji wrote:
> > Add 'bus-type' and 'data-lanes' define for port0, add HDCP support
> > flag and DP tx lane0 and lane1 swing register array define.
> > 
> > Signed-off-by: Xin Ji <xji@analogixsemi.com>
> > ---
> >  .../bindings/display/bridge/analogix,anx7625.yaml  | 57 ++++++++++++++++++++--
> >  1 file changed, 54 insertions(+), 3 deletions(-)
> > 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
Hi Rob, OK, I'll fix it in the next serial.
Thanks,
Xin
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: encoder@58: ports: '#address-cells', '#size-cells' do not match any of the regexes: 'pinctrl-[0-9]+'
> 	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: encoder@58: ports:port@1:endpoint: Additional properties are not allowed ('remote-endpoint' was unexpected)
> 	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> 
> See https://patchwork.ozlabs.org/patch/1431199
> 
> This check can fail if there are any dependencies. The base for a patch
> series is generally the most recent rc1.
> 
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
> 
> pip3 install dtschema --upgrade
> 
> Please check and re-submit.

Re: [PATCH v3 1/3] dt-bindings:drm/bridge:anx7625:add HDCP support flag and swing reg

[Xin Ji]

Hi Rob, thanks for the comments, I'll fix the issue on the next serial.
Thanks,
Xin

On Mon, Jan 25, 2021 at 09:41:43AM -0600, Rob Herring wrote:
> On Mon, Jan 25, 2021 at 07:12:21PM +0800, Xin Ji wrote:
> > Add 'bus-type' and 'data-lanes' define for port0, add HDCP support
> > flag and DP tx lane0 and lane1 swing register array define.
> > 
> > Signed-off-by: Xin Ji <xji@analogixsemi.com>
> > ---
> >  .../bindings/display/bridge/analogix,anx7625.yaml  | 57 ++++++++++++++++++++--
> >  1 file changed, 54 insertions(+), 3 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > index 60585a4..3b1cbe0 100644
> > --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > @@ -34,23 +34,69 @@ properties:
> >      description: used for reset chip control, RESET_N pin B7.
> >      maxItems: 1
> >  
> > +  analogix,lane0-swing:
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    description:
> > +      an array of swing register setting for DP tx lane0 PHY, please don't
> > +      add this property, or contact vendor.
> > +
> > +  analogix,lane1-swing:
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    description:
> > +      an array of swing register setting for DP tx lane1 PHY, please don't
> > +      add this property, or contact vendor.
> > +
> > +  analogix,hdcp-support:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: indicate the DP tx HDCP support or not.
> 
> Sounds like a boolean.
OK, I'll change it to boolean.
> 
> > +
> >    ports:
> >      type: object
> > +    additionalProperties: false
> >  
> >      properties:
> >        port@0:
> >          type: object
> >          description:
> > -          Video port for MIPI DSI input.
> > +          Video port for MIPI input.
> 
> You're going to need to rebase this one drm-misc-next which uses the 
> graph schema now.
OK, I'll rebase it.
> 
> > +
> > +        properties:
> > +          endpoint:
> > +            type: object
> > +            additionalProperties: false
> > +
> > +            # Properties described in
> > +            # Documentation/devicetree/bindings/media/video-interfaces.txt
> > +            properties:
> > +              remote-endpoint: true
> > +              bus-type: true
> > +              data-lanes: true
> > +
> > +            required:
> > +              - remote-endpoint
> > +
> > +        required:
> > +          - endpoint
> >  
> >        port@1:
> >          type: object
> >          description:
> >            Video port for panel or connector.
> >  
> > +        properties:
> > +          endpoint:
> > +            type: object
> > +            additionalProperties: false
> > +
> > +            required:
> > +              - remote-endpoint
> > +
> > +        required:
> > +          - endpoint
> > +
> >      required:
> > -        - port@0
> > -        - port@1
> > +      - port@0
> > +      - port@1
> >  
> >  required:
> >    - compatible
> > @@ -73,6 +119,10 @@ examples:
> >              enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
> >              reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
> >  
> > +            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> > +            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> > +            analogix,hdcp-support = <0>;
> > +
> >              ports {
> >                  #address-cells = <1>;
> >                  #size-cells = <0>;
> > @@ -81,6 +131,7 @@ examples:
> >                      reg = <0>;
> >                      anx7625_in: endpoint {
> >                          remote-endpoint = <&mipi_dsi>;
> > +                        bus-type = <5>;
> >                      };
> >                  };
> >  
> > -- 
> > 2.7.4
> >