diff --git a/Documentation/devicetree/bindings/display/sunxi/sun6i-dsi.txt b/Documentation/devicetree/bindings/display/sunxi/sun6i-dsi.txt
index 9fa6e7a758ad..adc7cdf129dd 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun6i-dsi.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun6i-dsi.txt
@@ -28,6 +28,9 @@ Required properties:
     first port should be the input endpoint, usually coming from the
     associated TCON.
 
+Optional properties:
+  - vcc-dsi-supply: the VCC-DSI power supply of the DSI encoder
+
 Any MIPI-DSI device attached to this should be described according to
 the bindings defined in ../mipi-dsi-bus.txt