[PATCH v2 1/3] dt-bindings: Add document for rockchip RGB output interface

[hjc@rock-chips.com (Sandy Huang)]

This path add support rv1108 rgb output interface driver.

Signed-off-by: Sandy Huang <hjc@rock-chips.com>
---
Changes in v2:
 1. rename rockchip,rgb-mode to rgb-mode;
 2. delete reg for signle endpoint;

 .../bindings/display/rockchip/rockchip-rgb.txt     | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/rockchip/rockchip-rgb.txt

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip-rgb.txt b/Documentation/devicetree/bindings/display/rockchip/rockchip-rgb.txt
new file mode 100644
index 0000000..86bd1ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip-rgb.txt
@@ -0,0 +1,78 @@
+Rockchip RV1108 RGB interface
+================================
+
+Required properties:
+- compatible: matching the soc type:
+	- "rockchip,rv1108-rgb";
+
+Optional properties:
+- pinctrl-names: must contain a "lcdc" entry.
+- pinctrl-0: pin control group to be used for this interface.
+
+Required nodes:
+- rgb-mode: should be "p888", "p666", "p565", "s888", "s888-dummy"
+	- p888: output r8-g8-b8 at each dclk cycle for per-pixel
+	- p666: output r6-g6-b6 at each dclk cycle for per-pixel
+	- p565: output r5-g6-b5 at each dclk cycle for per-pixel
+	- s888: output r8-g8-b8 in three dclk cycle for per-pixel
+	- s888-dmmy: output r8-g8-b8-dummy in four dclk cycle for per-pixel
+
+The rgb has two video ports described by:
+	Documentation/devicetree/bindings/media/video-interfaces.txt
+Their connections are modeled using the OF graph bindings specified in
+	Documentation/devicetree/bindings/graph.txt.
+
+- video port 0 for the VOP input, the remote endpoint maybe vopb/vopl/vop
+- video port 1 for either a panel or subsequent encoder
+
+the panel described by:
+	Documentation/devicetree/bindings/display/panel/simple-panel.txt
+Panel other required properties:
+- ports for remote rgb output.
+
+Example:
+
+panel: panel {
+	compatible = "auo,b101ean01";
+	enable-gpios = <&gpio7 21 GPIO_ACTIVE_HIGH>;
+
+	ports {
+		panel_in_rgb: endpoint {
+			remote-endpoint = <&rgb_out_panel>;
+		};
+	};
+};
+
+For Rockchip RV1108:
+
+	rgb: rgb {
+		compatible = "rockchip,rv1108-rgb";
+		pinctrl-names = "lcdc";
+		pinctrl-0 = <&lcdc_ctl>;
+		rgb-mode = "p888";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			rgb_in: port at 0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				rgb_in_vop: endpoint {
+					remote-endpoint = <&vop_out_rgb>;
+				};
+			};
+
+			rgb_out: port at 1 {
+				reg = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				rgb_out_panel: endpoint {
+					remote-endpoint = <&panel_in_rgb>;
+				};
+			};
+		};
+	};
-- 
2.7.4