IMX93 HDMI sound card with LT9611UXC

[AlanWen]

I have ported the LT9611UXC for audio with simple-sound-card in device tree.

The kernel device tree

\ {
    sound-hdmi {
		compatible = "simple-audio-card";
		simple-audio-card,format = "i2s";
		simple-audio-card,name = "lt9611uxc-hdmi";
		simple-audio-card,bitclock-master = <&sound_master>;
		simple-audio-card,frame-master = <&sound_master>;
		
		sound_master:  simple-audio-card,cpu {
			sound-dai = <&sai3>;
		};
		
		simple-audio-card,codec {
			sound-dai = <&lt9611uxc_codec>;
			clocks = <&clk IMX93_CLK_SAI3_GATE>;
		};
	};
};

&sai3 {
	#sound-dai-cells = <0>;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_sai3>;
	assigned-clocks = <&clk IMX93_CLK_SAI3>;
	assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
	assigned-clock-rates = <24576000>;
	fsl,sai-mclk-direction-output;
	fsl,mode = "i2s-master";
	status = "okay";
};

&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
		>;
	};
};

while booting up and I can get the sound card device in aplay -l command

root@imx93evk:/music# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: lt9611uxchdmi [lt9611uxc-hdmi], device 0: 42660000.sai-i2s-hifi i2s-hifi-0 [42660000.sai-i2s-hifi i2s-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

But I got this error when I want to play an audio file

root@imx93evk:/music# aplay Field_Day.wav
[  866.394401] fsl-sai 42660000.sai: failed to derive required Tx rate: 1411200
[  866.401478] fsl-sai 42660000.sai: ASoC: error at snd_soc_dai_hw_params on 42660000.sai: -22
ALSA lib /usr/src/debug/alsa-lib/1.2.10-r0/src/pcm/pcm_direct.c:1337:(snd1_pcm_direct_initialize_slave) unable to ins        tall hw params
ALSA lib /usr/src/debug/alsa-lib/1.2.10-r0/src/pcm/pcm_dmix.c:1012:(snd_pcm_dmix_open) unable to initialize slave
aplay: main:834: audio open error: Invalid argument

What happened with this error ?

[AlanWen]

How can I change the SCLK value in the device tree ?  Currently, I measured the value of SCLK is 1.536MHz, but I need it to be 3.072Mhz.

[jimmychan]

Please try to add like below:

sound_master:  simple-audio-card,cpu {
			sound-dai = <&sai3>;
                        dai-tdm-slot-num = <2>;
                        dai-tdm-slot-width = <16>;
		};

[jimmychan]

Please try this:

&sai3{
#sound-dai-cells = <0>;
clocks = <&clk IMX93_CLK_SAI3_IPG>, <&clk IMX93_CLK_DUMMY>,
<&clk IMX93_CLK_SAI3_GATE>, <&clk IMX93_CLK_DUMMY>,
<&clk IMX93_CLK_DUMMY>, <&clk IMX93_CLK_AUDIO_PLL>;
clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k";
assigned-clocks = <&clk IMX93_CLK_SAI3>;
assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
assigned-clock-rates = <24576000>;
status = "okay";
};

[AlanWen]

There is still no sound while playing audio

root@imx93evk:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: lt9611uxchdmi [lt9611uxc-hdmi], device 0: 42660000.sai-i2s-hifi i2s-hifi-0 [42660000.sai-i2s-hifi i2s-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
root@imx93evk:~# aplay -f dat /music/Field_Day.wav
Playing raw data '/music/Field_Day.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
root@imx93evk:~#

[jimmychan]

Please double check the setting in alsamixer.