dt-bindings: display: rockchip: Add rk3576 DisplayPort

The DisplayPort found on RK3576 is very similar to that of RK3588,
but work in dual pixel mode. And itself does not depend on the I2S
clock or the SPDIF clock when transmit audio.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20260206010421.443605-2-andyshrk@163.com

Documentation/devicetree/bindings/display/rockchip/rockchip,dw-dp.yaml

@@ -27,12 +27,10 @@ description: |
   * Pixel clock up to 594MHz
   * I2S, SPDIF audio interface
 
-allOf:
-  - $ref: /schemas/sound/dai-common.yaml#
-
 properties:
   compatible:
     enum:
+      - rockchip,rk3576-dp
       - rockchip,rk3588-dp
 
   reg:
@@ -42,6 +40,7 @@ properties:
     maxItems: 1
 
   clocks:
+    minItems: 3
     items:
       - description: Peripheral/APB bus clock
       - description: DisplayPort AUX clock
@@ -50,6 +49,7 @@ properties:
       - description: SPDIF interfce clock
 
   clock-names:
+    minItems: 3
     items:
       - const: apb
       - const: aux
@@ -95,6 +95,27 @@ required:
   - ports
   - resets
 
+allOf:
+  - $ref: /schemas/sound/dai-common.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - rockchip,rk3588-dp
+    then:
+      properties:
+        clocks:
+          minItems: 5
+        clock-names:
+          minItems: 5
+    else:
+      properties:
+        clocks:
+          maxItems: 3
+        clock-names:
+          maxItems: 3
+
 unevaluatedProperties: false
 
 examples: