dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

Renesas R-Car LVDS Encoder

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

These DT bindings describe the LVDS encoder embedded in the Renesas R-Car

Gen2, R-Car Gen3 and RZ/G SoCs.

Required properties:

- compatible : Shall contain one of

  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders

  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders

  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders

  - "renesas,r8a7793-lvds" for R8A7793 (R-Car M2-N) compatible LVDS encoders

  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders

  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders

- reg: Base address and length for the memory-mapped registers

- clocks: A phandle + clock-specifier pair for the functional clock

- resets: A phandle + reset specifier for the module reset

Required nodes:

The LVDS encoder has two video ports. Their connections are modelled using the

OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.

- Video port 0 corresponds to the parallel RGB input

- Video port 1 corresponds to the LVDS output

Each port shall have a single endpoint.

Example:

	lvds0: lvds@feb90000 {

		compatible = "renesas,r8a7790-lvds";

		reg = <0 0xfeb90000 0 0x1c>;

		clocks = <&cpg CPG_MOD 726>;

		resets = <&cpg 726>;

		ports {

			#address-cells = <1>;

			#size-cells = <0>;

			port@0 {

				reg = <0>;

				lvds0_in: endpoint {

					remote-endpoint = <&du_out_lvds0>;

				};

			};

			port@1 {

				reg = <1>;

				lvds0_out: endpoint {

				};

			};

		};

	};

F:	drivers/gpu/drm/shmobile/

F:	include/linux/platform_data/shmob_drm.h

F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt

F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt

F:	Documentation/devicetree/bindings/display/renesas,du.txt

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