[PATCH] drm: rcar-du: Document the vsps property in the DT bindings

[Laurent Pinchart]

The property is used by the driver but is missing from the DT bindings.
Document it.

Reported-by: Geert Uytterhoeven <geert at linux-m68k.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
 Documentation/devicetree/bindings/display/renesas,du.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
index 1a02f099a0ff..cf34893a1b53 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -36,6 +36,11 @@ Required Properties:
       When supplied they must be named "dclkin.x" with "x" being the input
       clock numerical index.
 
+Optional Properties:
+
+  - vsps: A list of phandles to the VSP nodes that handle the memory
+    interfaces for the DU channels (Gen3 only).
+
 Required nodes:
 
 The connections to the DU output video ports are modeled using the OF graph
-- 
Regards,

Laurent Pinchart