diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
index 51c0ff7baa52..cfd13a6b6b68 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
@@ -61,7 +61,10 @@ properties:
       - mediatek,mt8195-vcodec-dec
 
   reg:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: VDEC_SYS register space
+      - description: VDEC_RACING_CTRL register space
 
   iommus:
     minItems: 1
@@ -98,6 +101,7 @@ patternProperties:
 
       reg:
         maxItems: 1
+        description: VDEC_MISC register space
 
       interrupts:
         maxItems: 1