topic Re: [imx8mp] The latest linux-imx(kernel) version in i.MX Processors

[imx8mp] The latest linux-imx(kernel) version

ESK — Mon, 14 Mar 2022 01:26:21 GMT

Dear NXP team,

I use imx8mp-evk with linux-imx lf-5.10.72-2.2.0

There is an usb uac2 error(Source/Sink driver does not working) with Windows10 PC.

So, I want to check using latest linux-imx.

Please let me know the latest linux-imx version and how to merge.

xiaocong_fu — Mon, 14 Mar 2022 01:37:46 GMT

It's not related to Linux version.

Please try this attached patch, and provide feedback.

ESK — Mon, 14 Mar 2022 07:37:08 GMT

Hi fu,

Thanks for the patch.

Windows sound driver working!!

Actually, I want to play 'wav' on Windows via uac2. (aplay on imax8mp > uac2 > Windows PC)

But There is "aplay: pcm_write:2058: write error: Input/output error"

Could you tell me the solution?

1. imx8mp g_audio setting

2. arecord wav file on imx8mp (using 2-channel PDM mic)

arecord -f S16_LE -D plughw:1,0 -t wav -r 48000 -c 2 -d 10 -vvv ./sample.wav

3. aplay test error

xiaocong_fu — Mon, 14 Mar 2022 07:42:56 GMT

1. Can you test the way round first: play in windows and record in device (8mp)

2. How did you record on windows side?

xiaocong_fu — Mon, 14 Mar 2022 08:51:13 GMT

I can play on device side and record on windows without error, here are my steps:

1. On windows, set uac2 microphone as default device

2. On windows, use Voice Recoder to record

3. On device side, use aplay to play:

aplay -Dhw:UAC2Gadget audio_l48k16b2c.wav -N

ESK — Wed, 16 Mar 2022 07:48:43 GMT

Hi Fu,

Thank you very much!!

I found "Mic (Source/Sink)" at input/output devices on PC.

And I tested well on Webex site mic test using "Mic (Source/Sink)"

BR,

Thanks.