Alsa no sound card found

[IDe P.1]

Hi All,

i'm having an issue with STM32MP157c and audio driver WM8994 (same as used into STM32MP15-DK).

At boot time i'm still have the following error:

[   4.250237] ALSA device list:

[   4.251761]  No soundcards found.

I share the electrical drawing of our custom board and my custom DTS.

I followed the steps described here:

https://wiki.st.com/stm32mpu/wiki/Soundcard_configuration#References

but i'm still get the same error.

Kind regards

Ilie

[Olivier GALLIEN]

Hi @IDe P.1​ ,

I'm wondering if you are not facing the case "Soundcard not probed" documented in https://wiki.st.com/stm32mpu/wiki/ALSA_troubleshooting_grid

Does the resolution tip help ?

Olivier

[IDe P.1]

Hi Olivier,

I already followed the case "Soundcard not probed", but it didn't help me.

Under /sys/kernel/debug/ i don't have the folders asoc/dais.

Ilie

[Olivier GALLIEN]

Hi @IDe P.1​ ,

WM8994 is used on EV1 board not DK ( which use CS42L51 ).

Also, I notice you are using for your design a DTS based on EV1 ..

compatible = "st,stm32mp157c-ev1", "st,stm32mp157c-ed1", "st,stm32mp157";

This looks consistent since your design seems to be very close to EV1 ..

But you use "sound" node template from DK ..

 sound {
 	compatible = "audio-graph-card";
		label = "STM32MP15-DK";			/* Sound card identified as STM32MP15DK in ALSA */
		routing =
			"Playback" , "MCLK1",
			"Capture" , "MCLK1",
			"MICL" , "Mic Bias";
		dais = <&sai2a_port &sai2b_port>;
		status = "okay";
	};

I guess it would be better to stick on EV1 model :

	sound {
		compatible = "audio-graph-card";
		label = "STM32MP15-EV";
		routing =
			"AIF1CLK" , "MCLK1",
			"AIF2CLK" , "MCLK1",
			"IN1LN" , "MICBIAS2",
			"DMIC2DAT" , "MICBIAS1",
			"DMIC1DAT" , "MICBIAS1";
		dais = <&sai2a_port &sai2b_port &sai4a_port &spdifrx_port
			&dfsdm0_port &dfsdm1_port &dfsdm2_port &dfsdm3_port>;
		status = "okay";
	};

Hope it help

Olivier

[IDe P.1]

Yes, you're right, WM8994 is used into EV1 but in my custom board i don't have all of the other interfaces mentioned here at chap.2.1:

https://wiki.st.com/stm32mpu/wiki/Soundcard_configuration#References

Your solution is the first way i done (tha same as indicated at the link upward), I also tried to remove &sai4a_port, &spdifrx_port, &dfsdm0_port, &dfsdm1_port, &dfsdm2_port, &dfsdm3_port because I didn't have these interfaces on my custom board but it didn't help at all.

Can you please provide the complete dts settings of EV1 board, please?

Regards

Ilie