diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml
index ef1f575757f6..b8b8e83ebc3f 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml
@@ -36,6 +36,10 @@ properties:
               - mediatek,mt8192-disp-gamma
               - mediatek,mt8195-disp-gamma
           - const: mediatek,mt8183-disp-gamma
+      - items:
+          - enum:
+              - mediatek,mt8188-disp-gamma
+          - const: mediatek,mt8195-disp-gamma
 
   reg:
     maxItems: 1