arm64: dts: ti: k3-am68-sk-base-board: Add HDMI support

AM68-SK has an HDMI port. The bridge used is TI-TFP410.
Add support to enable the connection:
DSS => TI TFP410 DPI-to-DVI Bridge => HDMI connector
Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com>
Link: https://lore.kernel.org/r/20230803081800.368582-3-j-choudhary@ti.comSigned-off-by: Nishanth Menon <nm@ti.com>

arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts

@@ -122,6 +122,52 @@ transceiver4: can-phy3 {
 		#phy-cells = <0>;
 		max-bitrate = <5000000>;
 	};
+
+	connector-hdmi {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdmi_hpd_pins_default>;
+		ddc-i2c-bus = <&mcu_i2c1>;
+		/* HDMI_HPD */
+		hpd-gpios = <&main_gpio0 0 GPIO_ACTIVE_HIGH>;
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&tfp410_out>;
+			};
+		};
+	};
+
+	bridge-dvi {
+		compatible = "ti,tfp410";
+		/* HDMI_PDn */
+		powerdown-gpios = <&exp2 0 GPIO_ACTIVE_LOW>;
+		ti,deskew = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				tfp410_in: endpoint {
+					remote-endpoint = <&dpi_out0>;
+					pclk-sample = <1>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				tfp410_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
 };
 
 &main_pmx0 {
@@ -202,6 +248,45 @@ J721S2_IOPAD(0x0cc, PIN_INPUT, 7) /* (AE27) SPI0_CS0.GPIO0_51 */
 			J721S2_IOPAD(0x08c, PIN_INPUT, 7) /* (T25) MCASP0_AXR7.GPIO0_35 */
 		>;
 	};
+
+	dss_vout0_pins_default: dss-vout0-default-pins {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x074, PIN_OUTPUT, 2) /* (R28) MCAN2_TX.VOUT0_DATA0 */
+			J721S2_IOPAD(0x070, PIN_OUTPUT, 2) /* (R27) MCAN1_RX.VOUT0_DATA1 */
+			J721S2_IOPAD(0x04c, PIN_OUTPUT, 2) /* (V27) MCASP1_AXR1.VOUT0_DATA10 */
+			J721S2_IOPAD(0x048, PIN_OUTPUT, 2) /* (AB27) MCASP0_AXR2.VOUT0_DATA11 */
+			J721S2_IOPAD(0x044, PIN_OUTPUT, 2) /* (Y26) MCASP0_AXR1.VOUT0_DATA12 */
+			J721S2_IOPAD(0x040, PIN_OUTPUT, 2) /* (AC28) MCASP0_AXR0.VOUT0_DATA13 */
+			J721S2_IOPAD(0x03c, PIN_OUTPUT, 2) /* (U27) MCASP0_AFSX.VOUT0_DATA14 */
+			J721S2_IOPAD(0x038, PIN_OUTPUT, 2) /* (AB28) MCASP0_ACLKX.VOUT0_DATA15 */
+			J721S2_IOPAD(0x0c8, PIN_OUTPUT, 2) /* (AD28) EXT_REFCLK1.VOUT0_DATA16 */
+			J721S2_IOPAD(0x030, PIN_OUTPUT, 2) /* (T26) GPIO0_12.VOUT0_DATA17 */
+			J721S2_IOPAD(0x02c, PIN_OUTPUT, 2) /* (V23) GPIO0_11.VOUT0_DATA18 */
+			J721S2_IOPAD(0x028, PIN_OUTPUT, 2) /* (AB24) MCAN16_RX.VOUT0_DATA19 */
+			J721S2_IOPAD(0x07c, PIN_OUTPUT, 2) /* (T27) MCASP0_AXR3.VOUT0_DATA2 */
+			J721S2_IOPAD(0x024, PIN_OUTPUT, 2) /* (Y28) MCAN16_TX.VOUT0_DATA20 */
+			J721S2_IOPAD(0x020, PIN_OUTPUT, 2) /* (AA23) MCAN15_RX.VOUT0_DATA21 */
+			J721S2_IOPAD(0x01c, PIN_OUTPUT, 2) /* (Y24) MCAN15_TX.VOUT0_DATA22 */
+			J721S2_IOPAD(0x018, PIN_OUTPUT, 2) /* (W23) MCAN14_RX.VOUT0_DATA23 */
+			J721S2_IOPAD(0x068, PIN_OUTPUT, 2) /* (U28) MCAN0_RX.VOUT0_DATA3 */
+			J721S2_IOPAD(0x064, PIN_OUTPUT, 2) /* (W28) MCAN0_TX.VOUT0_DATA4 */
+			J721S2_IOPAD(0x060, PIN_OUTPUT, 2) /* (AC27) MCASP2_AXR1.VOUT0_DATA5 */
+			J721S2_IOPAD(0x05c, PIN_OUTPUT, 2) /* (AA26) MCASP2_AXR0.VOUT0_DATA6 */
+			J721S2_IOPAD(0x058, PIN_OUTPUT, 2) /* (AA27) MCASP2_AFSX.VOUT0_DATA7 */
+			J721S2_IOPAD(0x054, PIN_OUTPUT, 2) /* (Y27) MCASP2_ACLKX.VOUT0_DATA8 */
+			J721S2_IOPAD(0x050, PIN_OUTPUT, 2) /* (W27) MCASP1_AXR2.VOUT0_DATA9 */
+			J721S2_IOPAD(0x084, PIN_OUTPUT, 2) /* (AA28) MCASP0_AXR5.VOUT0_DE */
+			J721S2_IOPAD(0x080, PIN_OUTPUT, 2) /* (U26) MCASP0_AXR4.VOUT0_HSYNC */
+			J721S2_IOPAD(0x078, PIN_OUTPUT, 2) /* (Y25) MCAN2_RX.VOUT0_PCLK */
+			J721S2_IOPAD(0x088, PIN_OUTPUT, 2) /* (AD27) MCASP0_AXR6.VOUT0_VP0_VSYNC */
+		>;
+	};
+
+	hdmi_hpd_pins_default: hdmi-hpd-default-pins {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x000, PIN_INPUT, 7) /* (AG24) EXTINTN.GPIO0_0  */
+		>;
+	};
 };
 
 &wkup_pmx2 {
@@ -373,6 +458,23 @@ &mcu_i2c0 {
 	clock-frequency = <400000>;
 };
 
+&mcu_i2c1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_i2c1_pins_default>;
+	/* i2c1 is used for DVI DDC, so we need to use 100kHz */
+	clock-frequency = <100000>;
+
+	exp2: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "HDMI_PDn","HDMI_LS_OE",
+				  "DP0_3V3_EN","eDP_ENABLE";
+	};
+};
+
 &main_sdhci0 {
 	/* Unused */
 	status = "disabled";
@@ -433,3 +535,39 @@ &main_mcan7 {
 	pinctrl-0 = <&main_mcan7_pins_default>;
 	phys = <&transceiver4>;
 };
+
+&dss {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&dss_vout0_pins_default>;
+	/*
+	 * These clock assignments are chosen to enable the following outputs:
+	 *
+	 * VP0 - DisplayPort SST
+	 * VP1 - DPI0
+	 * VP2 - DSI
+	 * VP3 - DPI1
+	 */
+	assigned-clocks = <&k3_clks 158 2>,
+			  <&k3_clks 158 5>,
+			  <&k3_clks 158 14>,
+			  <&k3_clks 158 18>;
+	assigned-clock-parents = <&k3_clks 158 3>,
+				 <&k3_clks 158 7>,
+				 <&k3_clks 158 16>,
+				 <&k3_clks 158 22>;
+};
+
+&dss_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/* HDMI */
+	port@1 {
+		reg = <1>;
+
+		dpi_out0: endpoint {
+			remote-endpoint = <&tfp410_in>;
+		};
+	};
+};