arm64: dts: renesas: r8a774a1: Add HDMI encoder instance

Add the HDMI encoder to the R8A774A1 DT in disabled state.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a774a1.dtsi

@@ -2368,6 +2368,37 @@ csi40vin7: endpoint@7 {
 			};
 		};
 
+		hdmi0: hdmi@fead0000 {
+			compatible = "renesas,r8a774a1-hdmi",
+				     "renesas,rcar-gen3-hdmi";
+			reg = <0 0xfead0000 0 0x10000>;
+			interrupts = <GIC_SPI 389 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 729>,
+				 <&cpg CPG_CORE R8A774A1_CLK_HDMI>;
+			clock-names = "iahb", "isfr";
+			power-domains = <&sysc R8A774A1_PD_ALWAYS_ON>;
+			resets = <&cpg 729>;
+			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>;
+				};
+				port@2 {
+					/* HDMI sound */
+					reg = <2>;
+				};
+			};
+		};
+
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a774a1";
 			reg = <0 0xfeb00000 0 0x70000>;
@@ -2394,6 +2425,7 @@ du_out_rgb: endpoint {
 				port@1 {
 					reg = <1>;
 					du_out_hdmi0: endpoint {
+						remote-endpoint = <&dw_hdmi0_in>;
 					};
 				};
 				port@2 {