On Mon, Apr 25, 2016 at 03:22:45PM +0200, Maxime Ripard wrote:

The display pipeline of the Allwinner A10 is involving several loosely
coupled components.

Add a documentation for the bindings.

Signed-off-by: Maxime Ripard <redacted>
---
 .../bindings/display/sunxi/sun4i-drm.txt           | 258 +++++++++++++++++++++
 1 file changed, 258 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt

+The display engine pipeline (and its entry point, since it can be
+either directly the backend or the frontend) is represented as an
+extra node.
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun5i-a13-display-engine
+
+  - allwinner,pipelines: list of phandle to the display engine
+    frontends available.

+display-engine {
+	compatible = "allwinner,sun5i-a13-display-engine";
+	pipelines = <&fe0>;

Missing allwinner prefix.

Otherwise,

Acked-by: Rob Herring <robh@kernel.org>