[PATCH] dt-bindings: display: mediatek: dp: Add #sound-dai-cells property

[Fei Shao]

The MediaTek DP hardware supports audio, and the "#sound-dai-cells"
property is required to describe DAI links and audio routing.

Add "#sound-dai-cells" property to the binding and filter out non-DP
compatibles, as MediaTek eDP doesn't support audio.

Signed-off-by: Fei Shao <fshao at chromium.org>
---

 .../bindings/display/mediatek/mediatek,dp.yaml   | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
index 2aef1eb32e11..c05c2b409780 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
@@ -42,6 +42,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  "#sound-dai-cells":
+    const: 0
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
     properties:
@@ -87,6 +90,19 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - mediatek,mt8188-dp-tx
+                - mediatek,mt8195-dp-tx
+    then:
+      properties:
+        "#sound-dai-cells": false
+
 examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
-- 
2.47.0.163.g1226f6d8fa-goog