arm64: dts: ti: k3-am625-beagleplay: Add HDMI support

The DSS outputs DPI signals via its second video port (VP2). The DPI
output from DSS is 24 bits (RGB888) and is forwarded to an HDMI
transmitter (ITE-IT66121) on the BeaglePlay platform. For audio output,
BeaglePlay uses mcasp1.

Add pinmux info for DSS DPI signals.

Further, add support for HDMI audio and video output.
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Link: https://lore.kernel.org/r/20230809084559.17322-6-a-bhatia1@ti.comSigned-off-by: Nishanth Menon <nm@ti.com>

arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts

@@ -192,6 +192,34 @@ usr: button-usr {
 
 	};
 
+	hdmi0: connector-hdmi {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&it66121_out>;
+			};
+		};
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "it66121 HDMI";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&hdmi_dailink_master>;
+		simple-audio-card,frame-master = <&hdmi_dailink_master>;
+
+		hdmi_dailink_master: simple-audio-card,cpu {
+			sound-dai = <&mcasp1>;
+			system-clock-direction-out;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&it66121>;
+		};
+	};
+
 	/* Workaround for errata i2329 - just use mdio bitbang */
 	mdio0: mdio {
 		compatible = "virtual,mdio-gpio";
@@ -422,6 +450,57 @@ pmic_irq_pins_default: pmic-irq-default-pins {
 			AM62X_IOPAD(0x01f4, PIN_INPUT_PULLUP, 0) /* (D16) EXTINTn */
 		>;
 	};
+
+	hdmi_gpio_pins_default: hdmi-gpio-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x0094, PIN_INPUT_PULLUP | PIN_DEBOUNCE_CONF6, 7) /* (N20) GPMC0_BE1n.GPIO0_36 */
+			AM62X_IOPAD(0x0054, PIN_OUTPUT_PULLUP, 7) /* (P21) GPMC0_AD6.GPIO0_21 */
+		>;
+	};
+
+	mcasp_hdmi_pins_default: mcasp-hdmi-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x0090, PIN_INPUT, 2) /* (M24) GPMC0_BE0n_CLE.MCASP1_ACLKX */
+			AM62X_IOPAD(0x0098, PIN_INPUT, 2) /* (U23) GPMC0_WAIT0.MCASP1_AFSX */
+			AM62X_IOPAD(0x008c, PIN_OUTPUT, 2) /* (L25) GPMC0_WEn.MCASP1_AXR0 */
+			AM62X_IOPAD(0x0088, PIN_INPUT, 2) /* (L24) GPMC0_OEn_REn.MCASP1_AXR1 */
+			AM62X_IOPAD(0x0084, PIN_INPUT, 2) /* (L23) GPMC0_ADVn_ALE.MCASP1_AXR2 */
+			AM62X_IOPAD(0x007c, PIN_INPUT, 2) /* (P25) GPMC0_CLK.MCASP1_AXR3 */
+		>;
+	};
+
+	dss0_pins_default: dss0-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x0100, PIN_OUTPUT, 0) /* (AC25) VOUT0_VSYNC */
+			AM62X_IOPAD(0x00f8, PIN_OUTPUT, 0) /* (AB24) VOUT0_HSYNC */
+			AM62X_IOPAD(0x0104, PIN_OUTPUT, 0) /* (AC24) VOUT0_PCLK */
+			AM62X_IOPAD(0x00fc, PIN_OUTPUT, 0) /* (Y20) VOUT0_DE */
+			AM62X_IOPAD(0x00b8, PIN_OUTPUT, 0) /* (U22) VOUT0_DATA0 */
+			AM62X_IOPAD(0x00bc, PIN_OUTPUT, 0) /* (V24) VOUT0_DATA1 */
+			AM62X_IOPAD(0x00c0, PIN_OUTPUT, 0) /* (W25) VOUT0_DATA2 */
+			AM62X_IOPAD(0x00c4, PIN_OUTPUT, 0) /* (W24) VOUT0_DATA3 */
+			AM62X_IOPAD(0x00c8, PIN_OUTPUT, 0) /* (Y25) VOUT0_DATA4 */
+			AM62X_IOPAD(0x00cc, PIN_OUTPUT, 0) /* (Y24) VOUT0_DATA5 */
+			AM62X_IOPAD(0x00d0, PIN_OUTPUT, 0) /* (Y23) VOUT0_DATA6 */
+			AM62X_IOPAD(0x00d4, PIN_OUTPUT, 0) /* (AA25) VOUT0_DATA7 */
+			AM62X_IOPAD(0x00d8, PIN_OUTPUT, 0) /* (V21) VOUT0_DATA8 */
+			AM62X_IOPAD(0x00dc, PIN_OUTPUT, 0) /* (W21) VOUT0_DATA9 */
+			AM62X_IOPAD(0x00e0, PIN_OUTPUT, 0) /* (V20) VOUT0_DATA10 */
+			AM62X_IOPAD(0x00e4, PIN_OUTPUT, 0) /* (AA23) VOUT0_DATA11 */
+			AM62X_IOPAD(0x00e8, PIN_OUTPUT, 0) /* (AB25) VOUT0_DATA12 */
+			AM62X_IOPAD(0x00ec, PIN_OUTPUT, 0) /* (AA24) VOUT0_DATA13 */
+			AM62X_IOPAD(0x00f0, PIN_OUTPUT, 0) /* (Y22) VOUT0_DATA14 */
+			AM62X_IOPAD(0x00f4, PIN_OUTPUT, 0) /* (AA21) VOUT0_DATA15 */
+			AM62X_IOPAD(0x005c, PIN_OUTPUT, 1) /* (R24) GPMC0_AD8.VOUT0_DATA16 */
+			AM62X_IOPAD(0x0060, PIN_OUTPUT, 1) /* (R25) GPMC0_AD9.VOUT0_DATA17 */
+			AM62X_IOPAD(0x0064, PIN_OUTPUT, 1) /* (T25) GPMC0_AD10.VOUT0_DATA18 */
+			AM62X_IOPAD(0x0068, PIN_OUTPUT, 1) /* (R21) GPMC0_AD11.VOUT0_DATA19 */
+			AM62X_IOPAD(0x006c, PIN_OUTPUT, 1) /* (T22) GPMC0_AD12.VOUT0_DATA20 */
+			AM62X_IOPAD(0x0070, PIN_OUTPUT, 1) /* (T24) GPMC0_AD13.VOUT0_DATA21 */
+			AM62X_IOPAD(0x0074, PIN_OUTPUT, 1) /* (U25) GPMC0_AD14.VOUT0_DATA22 */
+			AM62X_IOPAD(0x0078, PIN_OUTPUT, 1) /* (U24) GPMC0_AD15.VOUT0_DATA23 */
+		>;
+	};
 };
 
 &mcu_pmx0 {
@@ -670,6 +749,42 @@ &main_i2c2 {
 	pinctrl-0 = <&i2c2_1v8_pins_default>;
 	clock-frequency = <100000>;
 	status = "okay";
+
+	it66121: bridge-hdmi@4c {
+		compatible = "ite,it66121";
+		reg = <0x4c>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdmi_gpio_pins_default>;
+		vcn33-supply = <&vdd_3v3>;
+		vcn18-supply = <&buck2_reg>;
+		vrf12-supply = <&buck3_reg>;
+		reset-gpios = <&main_gpio0 21 GPIO_ACTIVE_LOW>;
+		interrupt-parent = <&main_gpio0>;
+		interrupts = <36 IRQ_TYPE_EDGE_FALLING>;
+		#sound-dai-cells = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				it66121_in: endpoint {
+					bus-width = <24>;
+					remote-endpoint = <&dpi1_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				it66121_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
 };
 
 &main_i2c3 {
@@ -756,3 +871,38 @@ &main_uart6 {
 	pinctrl-0 = <&wifi_debug_uart_pins_default>;
 	status = "okay";
 };
+
+&dss {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&dss0_pins_default>;
+};
+
+&dss_ports {
+	/* VP2: DPI Output */
+	port@1 {
+		reg = <1>;
+
+		dpi1_out: endpoint {
+			remote-endpoint = <&it66121_in>;
+		};
+	};
+};
+
+&mcasp1 {
+	status = "okay";
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp_hdmi_pins_default>;
+	auxclk-fs-ratio = <2177>;
+	op-mode = <0>;          /* MCASP_IIS_MODE */
+	tdm-slots = <2>;
+	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+	       1 0 0 0
+	       0 0 0 0
+	       0 0 0 0
+	       0 0 0 0
+	>;
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+};