arm64: dts: imx8mp: Enable HDMI on i.MX8MP DHCOM PDK2 and PDK3

Enable HDMI output on i.MX8MP DHCOM PDK2 and PDK3. The I2C5 on PDK2 and
I2C mux port 1 on PDK3 respectively are used in regular I2C mode instead
of HDMI DDC mode to permit connection of other I2C devices on those buses.
The pinctrl_hdmi node is part of the SoM DTSI already.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts

@@ -69,6 +69,18 @@ button-3 {
 		};
 	};
 
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		label = "X38";
+		type = "a";
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&hdmi_tx_out>;
+			};
+		};
+	};
+
 	led {
 		compatible = "gpio-leds";
 
@@ -184,6 +196,33 @@ &flexcan1 {
 	status = "okay";
 };
 
+&hdmi_pvi {
+	status = "okay";
+};
+
+&hdmi_tx {
+	ddc-i2c-bus = <&i2c5>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hdmi>;
+	status = "okay";
+
+	ports {
+		port@1 {
+			hdmi_tx_out: endpoint {
+				remote-endpoint = <&hdmi_connector_in>;
+			};
+		};
+	};
+};
+
+&hdmi_tx_phy {
+	status = "okay";
+};
+
+&lcdif3 {
+	status = "okay";
+};
+
 &pcie_phy {
 	clock-names = "ref";
 	clocks = <&hsio_blk_ctrl>;

arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts

@@ -75,6 +75,18 @@ button-3 {
 		};
 	};
 
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		label = "X28";
+		type = "a";
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&hdmi_tx_out>;
+			};
+		};
+	};
+
 	led {
 		compatible = "gpio-leds";
 
@@ -248,6 +260,33 @@ &flexcan1 {
 	status = "okay";
 };
 
+&hdmi_pvi {
+	status = "okay";
+};
+
+&hdmi_tx {
+	ddc-i2c-bus = <&i2cmuxed1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hdmi>;
+	status = "okay";
+
+	ports {
+		port@1 {
+			hdmi_tx_out: endpoint {
+				remote-endpoint = <&hdmi_connector_in>;
+			};
+		};
+	};
+};
+
+&hdmi_tx_phy {
+	status = "okay";
+};
+
+&lcdif3 {
+	status = "okay";
+};
+
 &pcie_phy {
 	clocks = <&pcieclk 1>;
 	clock-names = "ref";