arm64: tegra: Enable HDMI on Jetson TX2

Enable the host1x and necessary children and hook up the HDMI +5V pin to
enable video output on the HDMI port found on Jetson TX2.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts

@@ -74,6 +74,43 @@ pci@3,0 {
 		};
 	};
 
+	host1x@13e00000 {
+		status = "okay";
+
+		dpaux@15040000 {
+			status = "okay";
+		};
+
+		display-hub@15200000 {
+			status = "okay";
+		};
+
+		dsi@15300000 {
+			status = "disabled";
+		};
+
+		sor@15540000 {
+			status = "disabled";
+
+			nvidia,dpaux = <&dpaux1>;
+		};
+
+		sor@15580000 {
+			status = "okay";
+
+			avdd-io-supply = <&vdd_hdmi_1v05>;
+			vdd-pll-supply = <&vdd_1v8_ap>;
+			hdmi-supply = <&vdd_hdmi>;
+
+			nvidia,ddc-i2c-bus = <&ddc>;
+			nvidia,hpd-gpio = <&gpio TEGRA_MAIN_GPIO(P, 1) GPIO_ACTIVE_LOW>;
+		};
+
+		dpaux@155c0000 {
+			status = "okay";
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -120,5 +157,19 @@ vdd_sd: regulator@100 {
 
 			vin-supply = <&vdd_3v3_sys>;
 		};
+
+		vdd_hdmi: regulator@101 {
+			compatible = "regulator-fixed";
+			reg = <101>;
+
+			regulator-name = "VDD_HDMI_5V0";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+
+			gpio = <&exp1 14 GPIO_ACTIVE_HIGH>;
+			enable-active-high;
+
+			vin-supply = <&vdd_5v0_sys>;
+		};
 	};
 };

arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi

@@ -321,7 +321,7 @@ vddio_sdmmc3: ldo5 {
 						regulator-max-microvolt = <2800000>;
 					};
 
-					avdd_1v05: ldo7 {
+					vdd_hdmi_1v05: ldo7 {
 						regulator-name = "VDD_HDMI_1V05";
 						regulator-min-microvolt = <1050000>;
 						regulator-max-microvolt = <1050000>;