[PATCH v2 2/2] Add DT binding doc for DCU for ls1021a-twr

[Meng Yi]

Add port node to DCU node using "OF graph" discription.

Signed-off-by: Alison Wang <b18965 at freescale.com>
Signed-off-by: Xiubo Li <lixiubo at cmss.chinamobile.com>
Signed-off-by: Jianwei Wang <jianwei.wang.chn at gmail.com>
Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
 Documentation/devicetree/bindings/display/fsl,dcu.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/fsl,dcu.txt 
b/Documentation/devicetree/bindings/display/fsl,dcu.txt
index ae55cde..c973d94 100644
--- a/Documentation/devicetree/bindings/display/fsl,dcu.txt
+++ b/Documentation/devicetree/bindings/display/fsl,dcu.txt
@@ -17,6 +17,10 @@ Required properties:
 Optional properties:
 - fsl,tcon:            The phandle to the timing controller node.

+Optional nodes:
+
+- Video port 0 for the HDMI output
+
 Examples:
 dcu: dcu at 2ce0000 {
        compatible = "fsl,ls1021a-dcu";
@@ -26,4 +30,9 @@ dcu: dcu at 2ce0000 {
        big-endian;
        fsl,panel = <&panel>;
        fsl,tcon = <&tcon>;
+       port at 0 {
+               dcu_out_hdmi: endpoint {
+                       remote-endpoint = <&sii9022a_out>;
+               };
+       };
 };
-- 
2.1.0.27.g96db324