diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index e4f17d29343b..b96e1ea40d3f 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -219,6 +219,7 @@ allOf:
           - required:
               - "#sound-dai-cells"
       else:
+        $ref: /schemas/sound/dai-common.yaml#
         properties:
           aux-bus: false
         required: