This makes it possible to choose a different pixel format for the
endpoint. Modelled after what other LCD controllers use, including
marvell,pxa2xx-lcdc and atmel,hlcdc-display-controller and perhaps more.

Signed-off-by: Lubomir Rintel <lkund...@v3.sk>
---
 .../bindings/display/armada/marvell-armada-drm.txt          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git 
a/Documentation/devicetree/bindings/display/armada/marvell-armada-drm.txt 
b/Documentation/devicetree/bindings/display/armada/marvell-armada-drm.txt
index 53524077db25..0a734f6d5a1e 100644
--- a/Documentation/devicetree/bindings/display/armada/marvell-armada-drm.txt
+++ b/Documentation/devicetree/bindings/display/armada/marvell-armada-drm.txt
@@ -49,6 +49,11 @@ Required child nodes:
 
 - port: video output port with endpoints, as described by
   Documentation/devicetree/bindings/graph.txt
+  The endpoints can optionally specify the following property:
+
+  - bus-width: recognized values are <12>, <16>, <18> and <24>, that
+    select "rgb444", "rgb565", "rgb666" or "rgb888" pixel format
+    respectively. Defaults to <24> if unspecified.
 
 Example:
 
@@ -61,6 +66,7 @@ Example:
 
                lcd0_port: port {
                        lcd0_rgb_out: endpoint {
+                               bus-width = <24>;
                                remote-endpoint = <&encoder_rgb_in>;
                        };
                };
-- 
2.20.1

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