dt-bindings: drm/bridge: anx7625: Add aux-bus node

List panel under aux-bus node if it's connected to anx7625's aux bus.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220213103437.3363848-4-hsinyi@chromium.org

Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

@@ -83,6 +83,9 @@ properties:
     type: boolean
     description: let the driver enable audio HDMI codec function or not.
 
+  aux-bus:
+    $ref: /schemas/display/dp-aux-bus.yaml#
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
@@ -167,5 +170,19 @@ examples:
                     };
                 };
             };
+
+            aux-bus {
+                panel {
+                    compatible = "innolux,n125hce-gn1";
+                    power-supply = <&pp3300_disp_x>;
+                    backlight = <&backlight_lcd0>;
+
+                    port {
+                        panel_in: endpoint {
+                            remote-endpoint = <&anx7625_out>;
+                        };
+                    };
+                };
+            };
         };
     };