dt-bindings: display: renesas: Add R-Car Gen3 HDMI TX DT bindings

Renesas Gen3 DWC HDMI TX Encoder

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

The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP

with a companion PHY IP.

These DT bindings follow the Synopsys DWC HDMI TX bindings defined in

Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the

following device-specific properties.

Required properties:

- compatible : Shall contain one or more of

  - "renesas,r8a7795-hdmi" for R8A7795 (R-Car H3) compatible HDMI TX

  - "renesas,rcar-gen3-hdmi" for the generic R-Car Gen3 compatible HDMI TX

    When compatible with generic versions, nodes must list the SoC-specific

    version corresponding to the platform first, followed by the

    family-specific version.

- reg: See dw_hdmi.txt.

- interrupts: HDMI interrupt number

- clocks: See dw_hdmi.txt.

- clock-names: Shall contain "iahb" and "isfr" as defined in dw_hdmi.txt.

- ports: See dw_hdmi.txt. The DWC HDMI shall have one port numbered 0

  corresponding to the video input of the controller and one port numbered 1

  corresponding to its HDMI output. Each port shall have a single endpoint.

Optional properties:

- power-domains: Shall reference the power domain that contains the DWC HDMI,

  if any.

Example:

	hdmi0: hdmi0@fead0000 {

		compatible = "renesas,r8a7795-dw-hdmi";

		reg = <0 0xfead0000 0 0x10000>;

		interrupts = <0 389 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cpg CPG_CORE R8A7795_CLK_S0D4>, <&cpg CPG_MOD 729>;

		clock-names = "iahb", "isfr";

		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;

		status = "disabled";

		ports {

			#address-cells = <1>;

			#size-cells = <0>;

			port@0 {

				reg = <0>;

				dw_hdmi0_in: endpoint {

					remote-endpoint = <&du_out_hdmi0>;

				};

			};

			port@1 {

				reg = <1>;

				rcar_dw_hdmi0_out: endpoint {

					remote-endpoint = <&hdmi0_con>;

				};

			};

		};

	};

	hdmi0-out {

		compatible = "hdmi-connector";

		label = "HDMI0 OUT";

		type = "a";

		port {

			hdmi0_con: endpoint {

				remote-endpoint = <&rcar_dw_hdmi0_out>;

			};

		};

	};

F:	drivers/gpu/drm/rcar-du/

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/renesas,du.txt

DRM DRIVER FOR QXL VIRTUAL GPU