riscv: dts: starfive: jh7110-pine64-star64: add HDMI audio nodes

Signed-off-by: MichaIng <micha@dietpi.com>

Author: MichaIng

arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts

@@ -40,6 +40,30 @@
 			linux,cma-default;
 		};
 	};
+
+	sound1: snd-card1 {
+		compatible = "simple-audio-card";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		simple-audio-card,name = "Starfive-HDMI-Sound-Card";
+		simple-audio-card,dai-link@0 {
+			reg = <0>;
+			format = "i2s";
+			bitclock-master = <&sndi2s0>;
+			frame-master = <&sndi2s0>;
+			mclk-fs = <256>;
+			status = "okay";
+
+			sndi2s0: cpu {
+				sound-dai = <&i2stx0>;
+			};
+
+			codec {
+				sound-dai = <&hdmi>;
+			};
+		};
+	};
 };
 
 &dc8200 {
@@ -122,6 +146,12 @@
 	status = "okay";
 };
 
+&i2stx0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mclk_ext_pins>;
+	status = "okay";
+};
+
 &hdmi {
 	status = "okay";
 	pinctrl-names = "default";
@@ -282,6 +312,15 @@
 		};
 	};
 
+	mclk_ext_pins: mclk-ext-0 {
+		mclk-ext-pins {
+			pinmux = <GPIOMUX(4, GPOUT_LOW,
+					     GPOEN_DISABLE,
+					     GPI_SYS_MCLK_EXT)>;
+			input-enable;
+		};
+	};
+
 	usb0_pins: usb0-0 {
 		vbus-pins {
 			pinmux = <GPIOMUX(25,  GPOUT_SYS_USB_DRIVE_VBUS,