topic Re: IMX93 HDMI sound card with LT9611UXC in i.MX Processors

IMX93 HDMI sound card with LT9611UXC

AlanWen — Wed, 09 Oct 2024 07:58:05 GMT

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 ?

Re: IMX93 HDMI sound card with LT9611UXC

jimmychan — Mon, 14 Oct 2024 01:17:31 GMT

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";
};

Re: IMX93 HDMI sound card with LT9611UXC

AlanWen — Mon, 14 Oct 2024 03:26:56 GMT

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:~#

Re: IMX93 HDMI sound card with LT9611UXC

jimmychan — Tue, 15 Oct 2024 02:34:34 GMT

Please double check the setting in alsamixer.

Re: IMX93 HDMI sound card with LT9611UXC

AlanWen — Tue, 15 Oct 2024 05:09:12 GMT

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.

Re: IMX93 HDMI sound card with LT9611UXC

jimmychan — Thu, 17 Oct 2024 09:05:32 GMT

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>; };