[PATCH v12 04/10] dt-bindings: display: bridge: anx7625: Add mode-switch support

[Pin-yen Lin]

Analogix 7625 can be used in systems to switch the DP traffic between
two downstreams, which can be USB Type-C DisplayPort alternate mode
lane or regular DisplayPort output ports.

Update the binding to accommodate this usage by introducing a
data-lanes and a mode-switch property on endpoints.

Also include the link to the product brief in the bindings.

Signed-off-by: Pin-yen Lin <treapking@xxxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>

---

Changes in v12:
- Removed the 4-lane binding in analogix,anx7625.yaml
- Reworded the description for the mode-switch property

Changes in v11:
- Updated the description of the endpoints
- Referenced video-interfaces.yaml instead for the endpoints

Changes in v10:
- Collected Reviewed-by and Tested-by tags

Changes in v9:
- Collected Reviewed-by tag

Changes in v8:
- Updated anx7625 bindings for data-lane property
- Fixed the subject prefix

Changes in v7:
- Fixed issues reported by dt_binding_check
- Updated the schema and the example dts for data-lanes.
- Changed to generic naming for the example dts node.

Changes in v6:
- Remove switches node and use endpoints and data-lanes property to
  describe the connections.

 .../display/bridge/analogix,anx7625.yaml      | 88 ++++++++++++++++++-
 1 file changed, 85 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
index 4590186c4a0b..a50de536cffd 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
@@ -12,7 +12,8 @@ maintainers:
 
 description: |
   The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
-  designed for portable devices.
+  designed for portable devices. Product brief is available at
+  https://www.analogix.com/en/system/files/AA-002291-PB-6-ANX7625_ProductBrief.pdf
 
 properties:
   compatible:
@@ -112,9 +113,40 @@ properties:
               data-lanes: true
 
       port@1:
-        $ref: /schemas/graph.yaml#/properties/port
+        $ref: /schemas/graph.yaml#/$defs/port-base
         description:
-          Video port for panel or connector.
+          Video port for panel or connector. Each endpoint connects to a video
+          output downstream, and the "data-lanes" property is used to describe
+          the pin connections. 0, 1, 2, 3 in "data-lanes" maps to SSRX1, SSTX1,
+          SSRX2, SSTX2, respectively.
+
+        patternProperties:
+          "^endpoint@[01]$":
+            $ref: /schemas/media/video-interfaces.yaml#
+            properties:
+              reg: true
+
+              remote-endpoint: true
+
+              data-lanes:
+                oneOf:
+                  - items:
+                      - enum: [0, 1, 2, 3]
+
+                  - items:
+                      - const: 0
+                      - const: 1
+
+                  - items:
+                      - const: 2
+                      - const: 3
+
+              mode-switch:
+                type: boolean
+                description: Serves as Type-C mode switch if present.
+
+            required:
+              - remote-endpoint
 
     required:
       - port@0
@@ -186,3 +218,53 @@ examples:
             };
         };
     };
+  - |
+    i2c3 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        encoder@58 {
+            compatible = "analogix,anx7625";
+            reg = <0x58>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&anx7625_dp_pins>;
+            enable-gpios = <&pio 176 GPIO_ACTIVE_HIGH>;
+            reset-gpios = <&pio 177 GPIO_ACTIVE_HIGH>;
+            vdd10-supply = <&pp1100_dpbrdg>;
+            vdd18-supply = <&pp1800_dpbrdg_dx>;
+            vdd33-supply = <&pp3300_dpbrdg_dx>;
+            analogix,audio-enable;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    anx7625_dp_in: endpoint {
+                        bus-type = <7>;
+                        remote-endpoint = <&dpi_out>;
+                    };
+                };
+
+                port@1 {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    reg = <1>;
+                    anx_typec0: endpoint@0 {
+                        reg = <0>;
+                        mode-switch;
+                        data-lanes = <0 1>;
+                        remote-endpoint = <&typec_port0>;
+                    };
+                    anx_typec1: endpoint@1 {
+                        reg = <1>;
+                        mode-switch;
+                        data-lanes = <2 3>;
+                        remote-endpoint = <&typec_port1>;
+                    };
+                };
+            };
+        };
+    };
-- 
2.39.2.637.g21b0678d19-goog