[IMX93] I2S with LT9611UXC to HDMI output

[AlanWen]

I'm trying to connect the I2S signal to HDMI output through LT9611UXC DSI to HDMI chip, the setup of my kernel device tree is:

/ {
	hdmi-out {
		compatible = "hdmi-connector";
		type = "a";
		port {
			hdmi_con: endpoint {
				remote-endpoint = <&lt9611_out>;
			};
		};
	};
};

&iomuxc {
	pinctrl_sai3: sai3grp {
		fsl,pins = <
			MX93_PAD_GPIO_IO26__SAI3_TX_SYNC		0x31e
			MX93_PAD_GPIO_IO16__SAI3_TX_BCLK		0x31e
			MX93_PAD_GPIO_IO17__SAI3_MCLK			0x31e
			MX93_PAD_GPIO_IO19__SAI3_TX_DATA00		0x31e
			MX93_PAD_GPIO_IO20__SAI3_RX_DATA00		0x31e
		>;
	};
};

&lpi2c3 {
	#address-cells = <1>;
	#size-cells = <0>;
	clock-frequency = <400000>;
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&pinctrl_lpi2c3>;
	pinctrl-1 = <&pinctrl_lpi2c3>;
	status = "okay";

	lt9611uxc_codec: hdmi-bridge@2b {
		compatible = "lontium,lt9611uxc";
		reg = <0x2b>;
		#sound-dai-cells = <1>;
		adi,dsi-lanes = <4>;
		
		interrupts-extended = <&gpio1 12 IRQ_TYPE_EDGE_FALLING>;
		reset-gpios = <&gpio3 26 GPIO_ACTIVE_HIGH>;

		status = "okay";
		
		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				reg = <0>;
				lt9611_to_dsi: endpoint {
					remote-endpoint = <&dsi_to_lt9611>;
				};
			};

			port@2 {
				reg = <2>;
				lt9611_out: endpoint {
					remote-endpoint = <&hdmi_con>;
				};
			};
		};
	};
};

&dsi {
	status = "okay";
	#address-cells = <1>;
	#size-cells = <0>;
	dsi-lanes = <4>;

	ports {
		port@1 {
			reg = <1>;
			dsi_to_lt9611: endpoint {
				remote-endpoint = <&lt9611_to_dsi>;
			};
		};
	};
};

But I can't find any sound card with command  aplay -l

I'm using the imx-6.6.3 kernel version with Yocto

Can anybody help me figure this issue out ? Thanks in advanced.

[AlanWen]

Does the LT9611UXC driver code support for I2S audio ?

code path: tmp/work/imx93evk-poky-linux/linux-imx/6.6.3+git/git/drivers/gpu/drm/bridge/lontium-lt9611uxc.c

[JorgeCas]

Hello,

LT9611UXC should be also defined as a new sound card. I suggest you use our EVK device tree as a reference (WM8962).

Best regards.

[AlanWen]

But which compatible should I use ? There is no suitable compatible for LT9611UXC.