Re: [PATCH v9 1/4] dt-bindings:drm/bridge:anx7625:add vendor define flags

On Wed, Jul 14, 2021 at 11:32:35AM +0300, Laurent Pinchart wrote:

Hi Xin,

On Wed, Jul 07, 2021 at 03:30:51PM +0800, Xin Ji wrote:

quoted

On Thu, Jun 24, 2021 at 01:57:22PM +0200, Robert Foss wrote:

quoted

Hey Xin,

I would like to merge this series now, but this patch needs a review
first. Maybe Laurent/Rob Herring are good candidates.

Hi Rob, I get Laurent/Rob comments before, and explained why we needs
these DT properties, so far, I didn't get any response.

Hi Rob Herring and Laurent, for the DT property lane0/1-swing, Google
engineer has strong demond for them, they don't want to move DP swing
adjusting to kernel, thus may cause change the driver code in each
project, so config them in DT is a best option.

Hardcoding it in the driver is certainly not a good option, but
hardcoding it in DT isn't either unless you can explain how the value
should be computed. "Contact the vendor" isn't good enough.

Hi Laurent Pinchart, thanks for the coment, I'll add more detail explain
about the value means.

Thanks,
Xin

quoted

quoted

On Tue, 22 Jun 2021 at 14:31, Xin Ji [off-list ref] wrote:

quoted

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

Signed-off-by: Xin Ji <redacted>
---
 .../display/bridge/analogix,anx7625.yaml      | 57 ++++++++++++++++++-
 1 file changed, 56 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..9e604d19a3d5 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

@@ -43,6 +43,26 @@ 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, please don't
+      add this property, or contact vendor.
+
+  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, please don't
+      add this property, or contact vendor.
+
+  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 +70,43 @@ 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 +137,9 @@ 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 +149,8 @@ examples:
                     reg = <0>;
                     anx7625_in: endpoint {
                         remote-endpoint = <&mipi_dsi>;
+                        bus-type = <5>;
+                        data-lanes = <0 1 2 3>;
                     };
                 };

-- 
Regards,

Laurent Pinchart