dt-bindings: display: Add Document for Rockchip Soc LVDS

Rockchip RK3288 LVDS interface

================================

Required properties:

- compatible: matching the soc type, one of

	- "rockchip,rk3288-lvds";

- reg: physical base address of the controller and length

	of memory mapped region.

- clocks: must include clock specifiers corresponding to entries in the

	clock-names property.

- clock-names: must contain "pclk_lvds"

- avdd1v0-supply: regulator phandle for 1.0V analog power

- avdd1v8-supply: regulator phandle for 1.8V analog power

- avdd3v3-supply: regulator phandle for 3.3V analog power

- rockchip,grf: phandle to the general register files syscon

- rockchip,output: "rgb", "lvds" or "duallvds", This describes the output interface

Optional properties:

- pinctrl-names: must contain a "lcdc" entry.

- pinctrl-0: pin control group to be used for this controller.

Required nodes:

The lvds has two video ports as 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 or vopl

- video port 1 for either a panel or subsequent encoder

the lvds panel described by

	Documentation/devicetree/bindings/display/panel/simple-panel.txt

Panel required properties:

- ports for remote LVDS output

Panel optional properties:

- data-mapping: should be "vesa-24","jeida-24" or "jeida-18".

This describes decribed by:

	Documentation/devicetree/bindings/display/panel/panel-lvds.txt

Example:

lvds_panel: lvds-panel {

	compatible = "auo,b101ean01";

	enable-gpios = <&gpio7 21 GPIO_ACTIVE_HIGH>;

	data-mapping = "jeida-24";

	ports {

		panel_in_lvds: endpoint {

			remote-endpoint = <&lvds_out_panel>;

		};

	};

};

For Rockchip RK3288:

	lvds: lvds@ff96c000 {

		compatible = "rockchip,rk3288-lvds";

		rockchip,grf = <&grf>;

		reg = <0xff96c000 0x4000>;

		clocks = <&cru PCLK_LVDS_PHY>;

		clock-names = "pclk_lvds";

		pinctrl-names = "lcdc";

		pinctrl-0 = <&lcdc_ctl>;

		avdd1v0-supply = <&vdd10_lcd>;

		avdd1v8-supply = <&vcc18_lcd>;

		avdd3v3-supply = <&vcca_33>;

		rockchip,output = "rgb";

		ports {

			#address-cells = <1>;

			#size-cells = <0>;

			lvds_in: port@0 {

				reg = <0>;

				lvds_in_vopb: endpoint@0 {

					reg = <0>;

					remote-endpoint = <&vopb_out_lvds>;

				};

				lvds_in_vopl: endpoint@1 {

					reg = <1>;

					remote-endpoint = <&vopl_out_lvds>;

				};

			};

			lvds_out: port@1 {

				reg = <1>;

				lvds_out_panel: endpoint {

					remote-endpoint = <&panel_in_lvds>;

				};

			};

		};

	};