[PATCH v10 0/4] Add MIPI rx DPI support

[PATCH v10 0/4] Add MIPI rx DPI support

[Xin Ji]

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

This is the v10 version, rebase all patches on the latest code.
Any mistakes, please let me know, I'll fix it in the next series.

Change history:
v10: Fix Rob Herring and Laurent Pinchart comments
 - Add more description about lane swing configuration in commit message

v9: Fix Neil Amstrong comment
 - use macro define 'V4L2_FWNODE_BUS_TYPE_PARALLEL' instead of fixing
   value.

v8: Fix Laurent Pinchart comment
 - Expand the commit message

v7:
 - Rebase DT on the latest branch 'drm-misc-next'.
 - Remove HDCP patch.

v6: Fix kernel robot compile warning

v5: Fix Rob Herring, Hsin-Yi, Robert Foss comments
 - Rebase code on the branch 'drm-misc-next', refer video-interfaces.yaml
 - Seprate HDCP function to a new patch
 - Fix driver not correctly get 'bus-type' 'data-lanes'
 - Add audio HDMI codec function support

v4: Fix Rob Herring comment
 - Rebase code on the branch 'drm-misc-next'
 - Change 'analogix,hdcp-support' type to boolean

v3: Fix Rob Herring, Dan Carpenter, Nicolas comment
 - 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 (4):
  dt-bindings:drm/bridge:anx7625:add vendor define flags
  drm/bridge: anx7625: fix not correct return value
  drm/bridge: anx7625: add MIPI DPI input feature
  drm/bridge: anx7625: add HDMI audio function

 .../display/bridge/analogix,anx7625.yaml      |  55 ++-
 drivers/gpu/drm/bridge/analogix/anx7625.c     | 458 ++++++++++++++++--
 drivers/gpu/drm/bridge/analogix/anx7625.h     |  23 +-
 3 files changed, 482 insertions(+), 54 deletions(-)

-- 
2.25.1

[PATCH v10 1/4] dt-bindings:drm/bridge:anx7625:add vendor define flags

[Xin Ji]

Add 'bus-type' and 'data-lanes' define for port0. Define DP tx lane0,
lane1 swing register array define, and audio enable flag.

The device which cannot pass DP tx PHY CTS caused by long PCB trace or
embedded MUX, adjusting ANX7625 PHY parameters can pass the CTS test. The
adjusting type include Pre-emphasis, Vp-p, Rterm(Resistor Termination)
and Rsel(Driven Strength). Each lane has maximum 20 registers for
these settings.

For the DP tx swing setting, each lane has 10 different combination for
swing, as Pre0: swing3|swing2|swing1|swing0, Pre1: swing2|swing1|swing0,
Pre2: swing1|swing0, Pre3: swing0.

Register definition as:
[Boost_ctrl]
These registers control post cursor manual, increase the Boost_Ctrl
setting can increase Pre-emphasis value separately.
Lane	Condition	Register address
Lane0	Swing0_Pre0	0x7a:0x00 bit[3:0]
Lane0	Swing1_Pre0	0x7a:0x01 bit[3:0]
Lane0	Swing2_Pre0	0x7a:0x02 bit[3:0]
Lane0	Swing3_Pre0	0x7a:0x03 bit[3:0]
Lane0	Swing0_Pre1	0x7a:0x04 bit[3:0]
Lane0	Swing1_Pre1	0x7a:0x05 bit[3:0]
Lane0	Swing2_Pre1	0x7a:0x06 bit[3:0]
Lane0	Swing0_Pre2	0x7a:0x07 bit[3:0]
Lane0	Swing1_Pre2	0x7a:0x08 bit[3:0]
Lane0	Swing0_Pre3	0x7a:0x09 bit[3:0]
Lane1	Swing0_Pre0	0x7a:0x14 bit[3:0]
Lane1	Swing1_Pre0	0x7a:0x15 bit[3:0]
Lane1	Swing2_Pre0	0x7a:0x16 bit[3:0]
Lane1	Swing3_Pre0	0x7a:0x17 bit[3:0]
Lane1	Swing0_Pre1	0x7a:0x18 bit[3:0]
Lane1	Swing1_Pre1	0x7a:0x19 bit[3:0]
Lane1	Swing2_Pre1	0x7a:0x1a bit[3:0]
Lane1	Swing0_Pre2	0x7a:0x1b bit[3:0]
Lane1	Swing1_Pre2	0x7a:0x1c bit[3:0]
Lane1	Swing0_Pre3	0x7a:0x1d bit[3:0]

[Swing_ctrl]
These registers control swing manual, increase Swing_Ctrl setting can
increase Vp-p value separately.
Lane	Condition	Register address
Lane0	Swing0_Pre0	0x7a:0x00 bit[6:4]
Lane0	Swing1_Pre0	0x7a:0x01 bit[6:4]
Lane0	Swing2_Pre0	0x7a:0x02 bit[6:4]
Lane0	Swing3_Pre0	0x7a:0x03 bit[6:4]
Lane0	Swing0_Pre1	0x7a:0x04 bit[6:4]
Lane0	Swing1_Pre1	0x7a:0x05 bit[6:4]
Lane0	Swing2_Pre1	0x7a:0x06 bit[6:4]
Lane0	Swing0_Pre2	0x7a:0x07 bit[6:4]
Lane0	Swing1_Pre2	0x7a:0x08 bit[6:4]
Lane0	Swing0_Pre3	0x7a:0x09 bit[6:4]
Lane1	Swing0_Pre0	0x7a:0x14 bit[6:4]
Lane1	Swing1_Pre0	0x7a:0x15 bit[6:4]
Lane1	Swing2_Pre0	0x7a:0x16 bit[6:4]
Lane1	Swing3_Pre0	0x7a:0x17 bit[6:4]
Lane1	Swing0_Pre1	0x7a:0x18 bit[6:4]
Lane1	Swing1_Pre1	0x7a:0x19 bit[6:4]
Lane1	Swing2_Pre1	0x7a:0x1a bit[6:4]
Lane1	Swing0_Pre2	0x7a:0x1b bit[6:4]
Lane1	Swing1_Pre2	0x7a:0x1c bit[6:4]
Lane1	Swing0_Pre3	0x7a:0x1d bit[6:4]

[Rsel_ctrl]
These registers control resistor compensation manual, increase Rsel_ctrl
can increase the IO driven strength, increase Vp-p simultaneously.
Lane	Condition	Register address
Lane0	Swing0_Pre0	0x7a:0x0a bit[4:0]
Lane0	Swing1_Pre0	0x7a:0x0b bit[4:0]
Lane0	Swing2_Pre0	0x7a:0x0c bit[4:0]
Lane0	Swing3_Pre0	0x7a:0x0d bit[4:0]
Lane0	Swing0_Pre1	0x7a:0x0e bit[4:0]
Lane0	Swing1_Pre1	0x7a:0x0f bit[4:0]
Lane0	Swing2_Pre1	0x7a:0x10 bit[4:0]
Lane0	Swing0_Pre2	0x7a:0x11 bit[4:0]
Lane0	Swing1_Pre2	0x7a:0x12 bit[4:0]
Lane0	Swing0_Pre3	0x7a:0x13 bit[4:0]
Lane1	Swing0_Pre0	0x7a:0x1e bit[4:0]
Lane1	Swing1_Pre0	0x7a:0x1f bit[4:0]
Lane1	Swing2_Pre0	0x7a:0x20 bit[4:0]
Lane1	Swing3_Pre0	0x7a:0x21 bit[4:0]
Lane1	Swing0_Pre1	0x7a:0x22 bit[4:0]
Lane1	Swing1_Pre1	0x7a:0x23 bit[4:0]
Lane1	Swing2_Pre1	0x7a:0x24 bit[4:0]
Lane1	Swing0_Pre2	0x7a:0x25 bit[4:0]
Lane1	Swing1_Pre2	0x7a:0x26 bit[4:0]
Lane1	Swing0_Pre3	0x7a:0x27 bit[4:0]

[Rterm_ctrl]
These registers adjust 50ohm impedance of DP tx
00:55 ohm
01:50 ohm(default)
10:45 ohm
11:40 ohm
Lane	Condition	Register address
Lane0	Swing0_Pre0	0x7a:0x0a bit[6:5]
Lane0	Swing1_Pre0	0x7a:0x0b bit[6:5]
Lane0	Swing2_Pre0	0x7a:0x0c bit[6:5]
Lane0	Swing3_Pre0	0x7a:0x0d bit[6:5]
Lane0	Swing0_Pre1	0x7a:0x0e bit[6:5]
Lane0	Swing1_Pre1	0x7a:0x0f bit[6:5]
Lane0	Swing2_Pre1	0x7a:0x10 bit[6:5]
Lane0	Swing0_Pre2	0x7a:0x11 bit[6:5]
Lane0	Swing1_Pre2	0x7a:0x12 bit[6:5]
Lane0	Swing0_Pre3	0x7a:0x13 bit[6:5]
lane1	Swing0_Pre0	0x7a:0x1e bit[6:5]
Lane1	Swing1_Pre0	0x7a:0x1f bit[6:5]
Lane1	Swing2_Pre0	0x7a:0x20 bit[6:5]
Lane1	Swing3_Pre0	0x7a:0x21 bit[6:5]
Lane1	Swing0_Pre1	0x7a:0x22 bit[6:5]
Lane1	Swing1_Pre1	0x7a:0x23 bit[6:5]
Lane1	Swing2_Pre1	0x7a:0x24 bit[6:5]
Lane1	Swing0_Pre2	0x7a:0x25 bit[6:5]
Lane1	Swing1_Pre2	0x7a:0x26 bit[6:5]
Lane1	Swing0_Pre3	0x7a:0x27 bit[6:5]

Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 .../display/bridge/analogix,anx7625.yaml      | 55 ++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
index ab48ab2f4240..77b160d7c269 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
@@ -43,6 +43,24 @@ properties:
   vdd33-supply:
     description: Regulator that provides the supply 3.3V power.
 
+  analogix,lane0-swing:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 20
+    description:
+      an array of swing register setting for DP tx lane0 PHY.
+
+  analogix,lane1-swing:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 20
+    description:
+      an array of swing register setting for DP tx lane1 PHY.
+
+  analogix,audio-enable:
+    type: boolean
+    description: let the driver enable audio HDMI codec function or not.
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
@@ -50,13 +68,43 @@ properties:
       port@0:
         $ref: /schemas/graph.yaml#/properties/port
         description:
-          Video port for MIPI DSI input.
+          MIPI DSI/DPI input.
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            type: object
+            additionalProperties: false
+
+            properties:
+              remote-endpoint: true
+              bus-type: true
+              data-lanes: true
+
+            required:
+              - remote-endpoint
+
+        required:
+          - endpoint
+
 
       port@1:
         $ref: /schemas/graph.yaml#/properties/port
         description:
           Video port for panel or connector.
 
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            type: object
+            additionalProperties: false
+
+            properties:
+              remote-endpoint: true
+
+            required:
+              - remote-endpoint
+
     required:
       - port@0
       - port@1
@@ -87,6 +135,9 @@ examples:
             vdd10-supply = <&pp1000_mipibrdg>;
             vdd18-supply = <&pp1800_mipibrdg>;
             vdd33-supply = <&pp3300_mipibrdg>;
+            analogix,audio-enable;
+            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
+            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
 
             ports {
                 #address-cells = <1>;
@@ -96,6 +147,8 @@ examples:
                     reg = <0>;
                     anx7625_in: endpoint {
                         remote-endpoint = <&mipi_dsi>;
+                        bus-type = <5>;
+                        data-lanes = <0 1 2 3>;
                     };
                 };
 
-- 
2.25.1

[PATCH v10 2/4] 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.

Reviewed-by: Robert Foss <robert.foss@linaro.org>
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 a3d82377066b..3fc6b7ce7fc7 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -191,10 +191,10 @@ 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,
-- 
2.25.1

[PATCH v10 3/4] drm/bridge: anx7625: add MIPI DPI input feature

[Xin Ji]

The basic anx7625 driver only support MIPI DSI rx signal input.
This patch add MIPI DPI rx input configuration support, after apply
this patch, the driver can support DSI rx or DPI rx by adding
'bus-type' in DT.

Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 246 ++++++++++++++++------
 drivers/gpu/drm/bridge/analogix/anx7625.h |  18 +-
 2 files changed, 204 insertions(+), 60 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 3fc6b7ce7fc7..a5a20cc0f3e0 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -32,6 +32,7 @@
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 
+#include <media/v4l2-fwnode.h>
 #include <video/display_timing.h>
 
 #include "anx7625.h"
@@ -152,18 +153,18 @@ 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)
@@ -221,38 +222,6 @@ 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)
 {
@@ -412,7 +381,7 @@ 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 +
@@ -597,6 +566,76 @@ 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 void anx7625_dp_start(struct anx7625_data *ctx)
 {
 	int ret;
@@ -607,9 +646,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
 		return;
 	}
 
-	anx7625_config_audio_input(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");
@@ -1047,6 +1087,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
 		return;
 	}
 
+	ctx->hpd_status = 1;
 	ctx->hpd_high_cnt++;
 
 	/* Not support HDCP */
@@ -1056,8 +1097,10 @@ 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)
@@ -1076,6 +1119,10 @@ 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;
+
 	ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
 				 ctx, val,
 				 ((val & HPD_STATUS) || (val < 0)),
@@ -1103,6 +1150,21 @@ 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;
@@ -1118,9 +1180,8 @@ 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)
@@ -1197,20 +1258,72 @@ 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 device_node *np = dev->of_node, *ep0;
 	struct drm_panel *panel;
 	int ret;
+	int bus_type, mipi_lanes;
 
+	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");
+	bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
+	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 = of_property_count_u32_elems(ep0, "data-lanes");
+	}
+
+	if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
+		pdata->is_dpi = 0;
+
+	pdata->mipi_lanes = mipi_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 = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
 	if (ret < 0) {
@@ -1273,9 +1386,13 @@ 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)
@@ -1303,7 +1420,7 @@ 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	|
@@ -1349,10 +1466,12 @@ 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) {
@@ -1451,6 +1570,10 @@ 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;
@@ -1827,8 +1950,13 @@ 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 034c3840028f..65db38e5da9a 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
@@ -347,12 +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 regulator_bulk_data supplies[3];
 	struct drm_bridge *panel_bridge;
 	int intp_irq;
+	int is_dpi;
+	int mipi_lanes;
+	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;
 };
-- 
2.25.1

[PATCH v10 4/4] drm/bridge: anx7625: add HDMI audio function

[Xin Ji]

Add audio HDMI codec function support, enable it through device true
flag "analogix,audio-enable".

Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Xin Ji <xji@analogixsemi.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 226 ++++++++++++++++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h |   5 +
 2 files changed, 231 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index a5a20cc0f3e0..44ab0893f600 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -33,6 +33,7 @@
 #include <drm/drm_probe_helper.h>
 
 #include <media/v4l2-fwnode.h>
+#include <sound/hdmi-codec.h>
 #include <video/display_timing.h>
 
 #include "anx7625.h"
@@ -153,6 +154,20 @@ 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)
+{
+	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;
@@ -1325,6 +1340,9 @@ static int anx7625_parse_dt(struct device *dev,
 	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;
+
 	ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
 	if (ret < 0) {
 		if (ret == -ENODEV)
@@ -1395,6 +1413,208 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
 				     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 (fmt->fmt != HDMI_DSP_A) {
+		DRM_DEV_ERROR(dev, "only supports DSP_A\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);
+
+	ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+				    AUDIO_CHANNEL_STATUS_6,
+				    ~I2S_SLAVE_MODE,
+				    TDM_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 const struct hdmi_codec_ops anx7625_codec_ops = {
+	.hw_params	= anx7625_audio_hw_params,
+	.audio_shutdown = anx7625_audio_shutdown,
+	.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->client->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 IS_ERR(ctx->audio_pdev);
+
+	DRM_DEV_DEBUG_DRIVER(dev, "bound to %s", HDMI_CODEC_DRV_NAME);
+
+	return 0;
+}
+
 static int anx7625_attach_dsi(struct anx7625_data *ctx)
 {
 	struct mipi_dsi_device *dsi;
@@ -1959,6 +2179,9 @@ static int anx7625_i2c_probe(struct i2c_client *client,
 				    DRM_MODE_CONNECTOR_DisplayPort;
 	drm_bridge_add(&platform->bridge);
 
+	if (platform->pdata.audio_en)
+		anx7625_register_audio(dev, platform);
+
 	DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
 
 	return 0;
@@ -1987,6 +2210,9 @@ static int anx7625_i2c_remove(struct i2c_client *client)
 
 	anx7625_unregister_i2c_dummy_clients(platform);
 
+	if (platform->pdata.audio_en)
+		anx7625_unregister_audio(platform);
+
 	kfree(platform);
 	return 0;
 }
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
index 65db38e5da9a..a9bdf05a1f66 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.h
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -111,6 +111,7 @@
 #define AUDIO_CHANNEL_STATUS_6 0xd5
 #define TDM_SLAVE_MODE 0x10
 #define I2S_SLAVE_MODE 0x08
+#define AUDIO_LAYOUT   0x01
 
 #define AUDIO_CONTROL_REGISTER 0xe6
 #define TDM_TIMING_MODE 0x08
@@ -365,6 +366,7 @@ struct anx7625_platform_data {
 	int intp_irq;
 	int is_dpi;
 	int mipi_lanes;
+	int audio_en;
 	int dp_lane0_swing_reg_cnt;
 	int lane0_reg_data[DP_TX_SWING_REG_CNT];
 	int dp_lane1_swing_reg_cnt;
@@ -385,6 +387,7 @@ struct anx7625_i2c_client {
 
 struct anx7625_data {
 	struct anx7625_platform_data pdata;
+	struct platform_device *audio_pdev;
 	int hpd_status;
 	int hpd_high_cnt;
 	/* Lock for work queue */
@@ -393,6 +396,8 @@ struct anx7625_data {
 	struct anx7625_i2c_client i2c;
 	struct i2c_client *last_client;
 	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;
 	char edid_block;
-- 
2.25.1

Re: [PATCH v10 1/4] dt-bindings:drm/bridge:anx7625:add vendor define flags

[Rob Herring]

On Mon, Jul 19, 2021 at 06:10:09PM +0800, Xin Ji wrote:
> Add 'bus-type' and 'data-lanes' define for port0. Define DP tx lane0,
> lane1 swing register array define, and audio enable flag.
> 
> The device which cannot pass DP tx PHY CTS caused by long PCB trace or
> embedded MUX, adjusting ANX7625 PHY parameters can pass the CTS test. The
> adjusting type include Pre-emphasis, Vp-p, Rterm(Resistor Termination)
> and Rsel(Driven Strength). Each lane has maximum 20 registers for
> these settings.
> 
> For the DP tx swing setting, each lane has 10 different combination for
> swing, as Pre0: swing3|swing2|swing1|swing0, Pre1: swing2|swing1|swing0,
> Pre2: swing1|swing0, Pre3: swing0.
> 
> Register definition as:
> [Boost_ctrl]
> These registers control post cursor manual, increase the Boost_Ctrl
> setting can increase Pre-emphasis value separately.
> Lane	Condition	Register address
> Lane0	Swing0_Pre0	0x7a:0x00 bit[3:0]
> Lane0	Swing1_Pre0	0x7a:0x01 bit[3:0]
> Lane0	Swing2_Pre0	0x7a:0x02 bit[3:0]
> Lane0	Swing3_Pre0	0x7a:0x03 bit[3:0]
> Lane0	Swing0_Pre1	0x7a:0x04 bit[3:0]
> Lane0	Swing1_Pre1	0x7a:0x05 bit[3:0]
> Lane0	Swing2_Pre1	0x7a:0x06 bit[3:0]
> Lane0	Swing0_Pre2	0x7a:0x07 bit[3:0]
> Lane0	Swing1_Pre2	0x7a:0x08 bit[3:0]
> Lane0	Swing0_Pre3	0x7a:0x09 bit[3:0]
> Lane1	Swing0_Pre0	0x7a:0x14 bit[3:0]
> Lane1	Swing1_Pre0	0x7a:0x15 bit[3:0]
> Lane1	Swing2_Pre0	0x7a:0x16 bit[3:0]
> Lane1	Swing3_Pre0	0x7a:0x17 bit[3:0]
> Lane1	Swing0_Pre1	0x7a:0x18 bit[3:0]
> Lane1	Swing1_Pre1	0x7a:0x19 bit[3:0]
> Lane1	Swing2_Pre1	0x7a:0x1a bit[3:0]
> Lane1	Swing0_Pre2	0x7a:0x1b bit[3:0]
> Lane1	Swing1_Pre2	0x7a:0x1c bit[3:0]
> Lane1	Swing0_Pre3	0x7a:0x1d bit[3:0]
> 
> [Swing_ctrl]
> These registers control swing manual, increase Swing_Ctrl setting can
> increase Vp-p value separately.
> Lane	Condition	Register address
> Lane0	Swing0_Pre0	0x7a:0x00 bit[6:4]
> Lane0	Swing1_Pre0	0x7a:0x01 bit[6:4]
> Lane0	Swing2_Pre0	0x7a:0x02 bit[6:4]
> Lane0	Swing3_Pre0	0x7a:0x03 bit[6:4]
> Lane0	Swing0_Pre1	0x7a:0x04 bit[6:4]
> Lane0	Swing1_Pre1	0x7a:0x05 bit[6:4]
> Lane0	Swing2_Pre1	0x7a:0x06 bit[6:4]
> Lane0	Swing0_Pre2	0x7a:0x07 bit[6:4]
> Lane0	Swing1_Pre2	0x7a:0x08 bit[6:4]
> Lane0	Swing0_Pre3	0x7a:0x09 bit[6:4]
> Lane1	Swing0_Pre0	0x7a:0x14 bit[6:4]
> Lane1	Swing1_Pre0	0x7a:0x15 bit[6:4]
> Lane1	Swing2_Pre0	0x7a:0x16 bit[6:4]
> Lane1	Swing3_Pre0	0x7a:0x17 bit[6:4]
> Lane1	Swing0_Pre1	0x7a:0x18 bit[6:4]
> Lane1	Swing1_Pre1	0x7a:0x19 bit[6:4]
> Lane1	Swing2_Pre1	0x7a:0x1a bit[6:4]
> Lane1	Swing0_Pre2	0x7a:0x1b bit[6:4]
> Lane1	Swing1_Pre2	0x7a:0x1c bit[6:4]
> Lane1	Swing0_Pre3	0x7a:0x1d bit[6:4]
> 
> [Rsel_ctrl]
> These registers control resistor compensation manual, increase Rsel_ctrl
> can increase the IO driven strength, increase Vp-p simultaneously.
> Lane	Condition	Register address
> Lane0	Swing0_Pre0	0x7a:0x0a bit[4:0]
> Lane0	Swing1_Pre0	0x7a:0x0b bit[4:0]
> Lane0	Swing2_Pre0	0x7a:0x0c bit[4:0]
> Lane0	Swing3_Pre0	0x7a:0x0d bit[4:0]
> Lane0	Swing0_Pre1	0x7a:0x0e bit[4:0]
> Lane0	Swing1_Pre1	0x7a:0x0f bit[4:0]
> Lane0	Swing2_Pre1	0x7a:0x10 bit[4:0]
> Lane0	Swing0_Pre2	0x7a:0x11 bit[4:0]
> Lane0	Swing1_Pre2	0x7a:0x12 bit[4:0]
> Lane0	Swing0_Pre3	0x7a:0x13 bit[4:0]
> Lane1	Swing0_Pre0	0x7a:0x1e bit[4:0]
> Lane1	Swing1_Pre0	0x7a:0x1f bit[4:0]
> Lane1	Swing2_Pre0	0x7a:0x20 bit[4:0]
> Lane1	Swing3_Pre0	0x7a:0x21 bit[4:0]
> Lane1	Swing0_Pre1	0x7a:0x22 bit[4:0]
> Lane1	Swing1_Pre1	0x7a:0x23 bit[4:0]
> Lane1	Swing2_Pre1	0x7a:0x24 bit[4:0]
> Lane1	Swing0_Pre2	0x7a:0x25 bit[4:0]
> Lane1	Swing1_Pre2	0x7a:0x26 bit[4:0]
> Lane1	Swing0_Pre3	0x7a:0x27 bit[4:0]
> 
> [Rterm_ctrl]
> These registers adjust 50ohm impedance of DP tx
> 00:55 ohm
> 01:50 ohm(default)
> 10:45 ohm
> 11:40 ohm
> Lane	Condition	Register address
> Lane0	Swing0_Pre0	0x7a:0x0a bit[6:5]
> Lane0	Swing1_Pre0	0x7a:0x0b bit[6:5]
> Lane0	Swing2_Pre0	0x7a:0x0c bit[6:5]
> Lane0	Swing3_Pre0	0x7a:0x0d bit[6:5]
> Lane0	Swing0_Pre1	0x7a:0x0e bit[6:5]
> Lane0	Swing1_Pre1	0x7a:0x0f bit[6:5]
> Lane0	Swing2_Pre1	0x7a:0x10 bit[6:5]
> Lane0	Swing0_Pre2	0x7a:0x11 bit[6:5]
> Lane0	Swing1_Pre2	0x7a:0x12 bit[6:5]
> Lane0	Swing0_Pre3	0x7a:0x13 bit[6:5]
> lane1	Swing0_Pre0	0x7a:0x1e bit[6:5]
> Lane1	Swing1_Pre0	0x7a:0x1f bit[6:5]
> Lane1	Swing2_Pre0	0x7a:0x20 bit[6:5]
> Lane1	Swing3_Pre0	0x7a:0x21 bit[6:5]
> Lane1	Swing0_Pre1	0x7a:0x22 bit[6:5]
> Lane1	Swing1_Pre1	0x7a:0x23 bit[6:5]
> Lane1	Swing2_Pre1	0x7a:0x24 bit[6:5]
> Lane1	Swing0_Pre2	0x7a:0x25 bit[6:5]
> Lane1	Swing1_Pre2	0x7a:0x26 bit[6:5]
> Lane1	Swing0_Pre3	0x7a:0x27 bit[6:5]

All this information should be in the properties description. But the 
above form is not all that clear in defining how to fill in the 
properties. You need to describe what is in each word of the properties 
and assume the reader has the datasheet. 
> 
> Signed-off-by: Xin Ji <xji@analogixsemi.com>
> ---
>  .../display/bridge/analogix,anx7625.yaml      | 55 ++++++++++++++++++-
>  1 file changed, 54 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> index ab48ab2f4240..77b160d7c269 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> @@ -43,6 +43,24 @@ properties:
>    vdd33-supply:
>      description: Regulator that provides the supply 3.3V power.
>  
> +  analogix,lane0-swing:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 1
> +    maxItems: 20
> +    description:
> +      an array of swing register setting for DP tx lane0 PHY.
> +
> +  analogix,lane1-swing:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 1
> +    maxItems: 20
> +    description:
> +      an array of swing register setting for DP tx lane1 PHY.
> +
> +  analogix,audio-enable:
> +    type: boolean
> +    description: let the driver enable audio HDMI codec function or not.
> +
>    ports:
>      $ref: /schemas/graph.yaml#/properties/ports
>  
> @@ -50,13 +68,43 @@ properties:
>        port@0:
>          $ref: /schemas/graph.yaml#/properties/port

This needs to be #/$defs/port-base instead since you are adding child 
properties.

Also needs 'unevaluatedProperties: false'.

>          description:
> -          Video port for MIPI DSI input.
> +          MIPI DSI/DPI input.
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/media/video-interfaces.yaml#
> +            type: object
> +            additionalProperties: false
> +
> +            properties:
> +              remote-endpoint: true
> +              bus-type: true

All the possible bus-type values are supported by this h/w?

> +              data-lanes: true
> +
> +            required:
> +              - remote-endpoint

Drop this.

> +
> +        required:
> +          - endpoint

Drop this.

> +
>  
>        port@1:
>          $ref: /schemas/graph.yaml#/properties/port
>          description:
>            Video port for panel or connector.
>  
> +        properties:
> +          endpoint:
> +            $ref: /schemas/media/video-interfaces.yaml#

No additional properties, you don't need this reference or the rest of 
this addition.

> +            type: object
> +            additionalProperties: false
> +
> +            properties:
> +              remote-endpoint: true
> +
> +            required:
> +              - remote-endpoint
> +
>      required:
>        - port@0
>        - port@1
> @@ -87,6 +135,9 @@ examples:
>              vdd10-supply = <&pp1000_mipibrdg>;
>              vdd18-supply = <&pp1800_mipibrdg>;
>              vdd33-supply = <&pp3300_mipibrdg>;
> +            analogix,audio-enable;
> +            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> +            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;

If the values are only 8-bit, then make the type uint8-array.

>  
>              ports {
>                  #address-cells = <1>;
> @@ -96,6 +147,8 @@ examples:
>                      reg = <0>;
>                      anx7625_in: endpoint {
>                          remote-endpoint = <&mipi_dsi>;
> +                        bus-type = <5>;
> +                        data-lanes = <0 1 2 3>;
>                      };
>                  };
>  
> -- 
> 2.25.1
> 
> 

Re: [PATCH v10 1/4] dt-bindings:drm/bridge:anx7625:add vendor define flags

[Xin Ji]

On Thu, Jul 29, 2021 at 01:08:24PM -0600, Rob Herring wrote:
> On Mon, Jul 19, 2021 at 06:10:09PM +0800, Xin Ji wrote:
> > Add 'bus-type' and 'data-lanes' define for port0. Define DP tx lane0,
> > lane1 swing register array define, and audio enable flag.
> > 
> > The device which cannot pass DP tx PHY CTS caused by long PCB trace or
> > embedded MUX, adjusting ANX7625 PHY parameters can pass the CTS test. The
> > adjusting type include Pre-emphasis, Vp-p, Rterm(Resistor Termination)
> > and Rsel(Driven Strength). Each lane has maximum 20 registers for
> > these settings.
> > 
> > For the DP tx swing setting, each lane has 10 different combination for
> > swing, as Pre0: swing3|swing2|swing1|swing0, Pre1: swing2|swing1|swing0,
> > Pre2: swing1|swing0, Pre3: swing0.
> > 
> > Register definition as:
> > [Boost_ctrl]
> > These registers control post cursor manual, increase the Boost_Ctrl
> > setting can increase Pre-emphasis value separately.
> > Lane	Condition	Register address
> > Lane0	Swing0_Pre0	0x7a:0x00 bit[3:0]
> > Lane0	Swing1_Pre0	0x7a:0x01 bit[3:0]
> > Lane0	Swing2_Pre0	0x7a:0x02 bit[3:0]
> > Lane0	Swing3_Pre0	0x7a:0x03 bit[3:0]
> > Lane0	Swing0_Pre1	0x7a:0x04 bit[3:0]
> > Lane0	Swing1_Pre1	0x7a:0x05 bit[3:0]
> > Lane0	Swing2_Pre1	0x7a:0x06 bit[3:0]
> > Lane0	Swing0_Pre2	0x7a:0x07 bit[3:0]
> > Lane0	Swing1_Pre2	0x7a:0x08 bit[3:0]
> > Lane0	Swing0_Pre3	0x7a:0x09 bit[3:0]
> > Lane1	Swing0_Pre0	0x7a:0x14 bit[3:0]
> > Lane1	Swing1_Pre0	0x7a:0x15 bit[3:0]
> > Lane1	Swing2_Pre0	0x7a:0x16 bit[3:0]
> > Lane1	Swing3_Pre0	0x7a:0x17 bit[3:0]
> > Lane1	Swing0_Pre1	0x7a:0x18 bit[3:0]
> > Lane1	Swing1_Pre1	0x7a:0x19 bit[3:0]
> > Lane1	Swing2_Pre1	0x7a:0x1a bit[3:0]
> > Lane1	Swing0_Pre2	0x7a:0x1b bit[3:0]
> > Lane1	Swing1_Pre2	0x7a:0x1c bit[3:0]
> > Lane1	Swing0_Pre3	0x7a:0x1d bit[3:0]
> > 
> > [Swing_ctrl]
> > These registers control swing manual, increase Swing_Ctrl setting can
> > increase Vp-p value separately.
> > Lane	Condition	Register address
> > Lane0	Swing0_Pre0	0x7a:0x00 bit[6:4]
> > Lane0	Swing1_Pre0	0x7a:0x01 bit[6:4]
> > Lane0	Swing2_Pre0	0x7a:0x02 bit[6:4]
> > Lane0	Swing3_Pre0	0x7a:0x03 bit[6:4]
> > Lane0	Swing0_Pre1	0x7a:0x04 bit[6:4]
> > Lane0	Swing1_Pre1	0x7a:0x05 bit[6:4]
> > Lane0	Swing2_Pre1	0x7a:0x06 bit[6:4]
> > Lane0	Swing0_Pre2	0x7a:0x07 bit[6:4]
> > Lane0	Swing1_Pre2	0x7a:0x08 bit[6:4]
> > Lane0	Swing0_Pre3	0x7a:0x09 bit[6:4]
> > Lane1	Swing0_Pre0	0x7a:0x14 bit[6:4]
> > Lane1	Swing1_Pre0	0x7a:0x15 bit[6:4]
> > Lane1	Swing2_Pre0	0x7a:0x16 bit[6:4]
> > Lane1	Swing3_Pre0	0x7a:0x17 bit[6:4]
> > Lane1	Swing0_Pre1	0x7a:0x18 bit[6:4]
> > Lane1	Swing1_Pre1	0x7a:0x19 bit[6:4]
> > Lane1	Swing2_Pre1	0x7a:0x1a bit[6:4]
> > Lane1	Swing0_Pre2	0x7a:0x1b bit[6:4]
> > Lane1	Swing1_Pre2	0x7a:0x1c bit[6:4]
> > Lane1	Swing0_Pre3	0x7a:0x1d bit[6:4]
> > 
> > [Rsel_ctrl]
> > These registers control resistor compensation manual, increase Rsel_ctrl
> > can increase the IO driven strength, increase Vp-p simultaneously.
> > Lane	Condition	Register address
> > Lane0	Swing0_Pre0	0x7a:0x0a bit[4:0]
> > Lane0	Swing1_Pre0	0x7a:0x0b bit[4:0]
> > Lane0	Swing2_Pre0	0x7a:0x0c bit[4:0]
> > Lane0	Swing3_Pre0	0x7a:0x0d bit[4:0]
> > Lane0	Swing0_Pre1	0x7a:0x0e bit[4:0]
> > Lane0	Swing1_Pre1	0x7a:0x0f bit[4:0]
> > Lane0	Swing2_Pre1	0x7a:0x10 bit[4:0]
> > Lane0	Swing0_Pre2	0x7a:0x11 bit[4:0]
> > Lane0	Swing1_Pre2	0x7a:0x12 bit[4:0]
> > Lane0	Swing0_Pre3	0x7a:0x13 bit[4:0]
> > Lane1	Swing0_Pre0	0x7a:0x1e bit[4:0]
> > Lane1	Swing1_Pre0	0x7a:0x1f bit[4:0]
> > Lane1	Swing2_Pre0	0x7a:0x20 bit[4:0]
> > Lane1	Swing3_Pre0	0x7a:0x21 bit[4:0]
> > Lane1	Swing0_Pre1	0x7a:0x22 bit[4:0]
> > Lane1	Swing1_Pre1	0x7a:0x23 bit[4:0]
> > Lane1	Swing2_Pre1	0x7a:0x24 bit[4:0]
> > Lane1	Swing0_Pre2	0x7a:0x25 bit[4:0]
> > Lane1	Swing1_Pre2	0x7a:0x26 bit[4:0]
> > Lane1	Swing0_Pre3	0x7a:0x27 bit[4:0]
> > 
> > [Rterm_ctrl]
> > These registers adjust 50ohm impedance of DP tx
> > 00:55 ohm
> > 01:50 ohm(default)
> > 10:45 ohm
> > 11:40 ohm
> > Lane	Condition	Register address
> > Lane0	Swing0_Pre0	0x7a:0x0a bit[6:5]
> > Lane0	Swing1_Pre0	0x7a:0x0b bit[6:5]
> > Lane0	Swing2_Pre0	0x7a:0x0c bit[6:5]
> > Lane0	Swing3_Pre0	0x7a:0x0d bit[6:5]
> > Lane0	Swing0_Pre1	0x7a:0x0e bit[6:5]
> > Lane0	Swing1_Pre1	0x7a:0x0f bit[6:5]
> > Lane0	Swing2_Pre1	0x7a:0x10 bit[6:5]
> > Lane0	Swing0_Pre2	0x7a:0x11 bit[6:5]
> > Lane0	Swing1_Pre2	0x7a:0x12 bit[6:5]
> > Lane0	Swing0_Pre3	0x7a:0x13 bit[6:5]
> > lane1	Swing0_Pre0	0x7a:0x1e bit[6:5]
> > Lane1	Swing1_Pre0	0x7a:0x1f bit[6:5]
> > Lane1	Swing2_Pre0	0x7a:0x20 bit[6:5]
> > Lane1	Swing3_Pre0	0x7a:0x21 bit[6:5]
> > Lane1	Swing0_Pre1	0x7a:0x22 bit[6:5]
> > Lane1	Swing1_Pre1	0x7a:0x23 bit[6:5]
> > Lane1	Swing2_Pre1	0x7a:0x24 bit[6:5]
> > Lane1	Swing0_Pre2	0x7a:0x25 bit[6:5]
> > Lane1	Swing1_Pre2	0x7a:0x26 bit[6:5]
> > Lane1	Swing0_Pre3	0x7a:0x27 bit[6:5]
> 
> All this information should be in the properties description. But the 
> above form is not all that clear in defining how to fill in the 
> properties. You need to describe what is in each word of the properties 
> and assume the reader has the datasheet. 
Hi Rob Herring, OK, I'll add it in the properties description
Thanks,
Xin
> > 
> > Signed-off-by: Xin Ji <xji@analogixsemi.com>
> > ---
> >  .../display/bridge/analogix,anx7625.yaml      | 55 ++++++++++++++++++-
> >  1 file changed, 54 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > index ab48ab2f4240..77b160d7c269 100644
> > --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > @@ -43,6 +43,24 @@ properties:
> >    vdd33-supply:
> >      description: Regulator that provides the supply 3.3V power.
> >  
> > +  analogix,lane0-swing:
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    minItems: 1
> > +    maxItems: 20
> > +    description:
> > +      an array of swing register setting for DP tx lane0 PHY.
> > +
> > +  analogix,lane1-swing:
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    minItems: 1
> > +    maxItems: 20
> > +    description:
> > +      an array of swing register setting for DP tx lane1 PHY.
> > +
> > +  analogix,audio-enable:
> > +    type: boolean
> > +    description: let the driver enable audio HDMI codec function or not.
> > +
> >    ports:
> >      $ref: /schemas/graph.yaml#/properties/ports
> >  
> > @@ -50,13 +68,43 @@ properties:
> >        port@0:
> >          $ref: /schemas/graph.yaml#/properties/port
> 
> This needs to be #/$defs/port-base instead since you are adding child 
> properties.
> 
> Also needs 'unevaluatedProperties: false'.
> 
> >          description:
> > -          Video port for MIPI DSI input.
> > +          MIPI DSI/DPI input.
> > +
> > +        properties:
> > +          endpoint:
> > +            $ref: /schemas/media/video-interfaces.yaml#
> > +            type: object
> > +            additionalProperties: false
> > +
> > +            properties:
> > +              remote-endpoint: true
> > +              bus-type: true
> 
> All the possible bus-type values are supported by this h/w?
> 
> > +              data-lanes: true
> > +
> > +            required:
> > +              - remote-endpoint
> 
> Drop this.
> 
> > +
> > +        required:
> > +          - endpoint
> 
> Drop this.
> 
> > +
> >  
> >        port@1:
> >          $ref: /schemas/graph.yaml#/properties/port
> >          description:
> >            Video port for panel or connector.
> >  
> > +        properties:
> > +          endpoint:
> > +            $ref: /schemas/media/video-interfaces.yaml#
> 
> No additional properties, you don't need this reference or the rest of 
> this addition.
> 
> > +            type: object
> > +            additionalProperties: false
> > +
> > +            properties:
> > +              remote-endpoint: true
> > +
> > +            required:
> > +              - remote-endpoint
> > +
> >      required:
> >        - port@0
> >        - port@1
> > @@ -87,6 +135,9 @@ examples:
> >              vdd10-supply = <&pp1000_mipibrdg>;
> >              vdd18-supply = <&pp1800_mipibrdg>;
> >              vdd33-supply = <&pp3300_mipibrdg>;
> > +            analogix,audio-enable;
> > +            analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> > +            analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> 
> If the values are only 8-bit, then make the type uint8-array.
> 
> >  
> >              ports {
> >                  #address-cells = <1>;
> > @@ -96,6 +147,8 @@ examples:
> >                      reg = <0>;
> >                      anx7625_in: endpoint {
> >                          remote-endpoint = <&mipi_dsi>;
> > +                        bus-type = <5>;
> > +                        data-lanes = <0 1 2 3>;
> >                      };
> >                  };
> >  
> > -- 
> > 2.25.1
> > 
> >