topic Re: /dev/snd/pcmC0D0p failed: Device or resource busy in Android 9 Automotive HFP in i.MX Processors

/dev/snd/pcmC0D0p failed: Device or resource busy in Android 9 Automotive HFP

vinothkumars — Fri, 16 Oct 2020 02:06:07 GMT

Dear NXP,

Board: IMX8QM-MEB

OS: Android 9 Automotive

When in BT Call I got the following error continuously,

can not open /dev/snd/pcmC0D0p failed: Device or resource busy.

My question is which card is used for HFP in IMX8QM-MEK Android 9 Automotive ?

XTOR, CS422888, WM8960.

Please provide the HFP stream follow for Android 9 Automotive ?

Thanks & Regards,

Re: /dev/snd/pcmC0D0p failed: Device or resource busy in Android 9 Automotive HFP

vinothkumars — Sat, 24 Oct 2020 06:57:38 GMT

Hi, My question is which card is used for HFP in IMX8QM-MEK Android 9 Automotive ?

XTOR, CS422888, WM8960.

Re: /dev/snd/pcmC0D0p failed: Device or resource busy in Android 9 Automotive HFP

AldoG — Thu, 29 Oct 2020 00:40:47 GMT

Hello,

BT HFP should use dummy machine driver imx-xtor.c this will route audio to the real audio codec which for i.MX8QM MEK should be WM8960.

Regards,
Aldo.

Re: /dev/snd/pcmC0D0p failed: Device or resource busy in Android 9 Automotive HFP

vinothkumars — Thu, 29 Oct 2020 04:37:39 GMT

Thank you for the reply nxf46838

audio_hw_primary: cannot open pcm_out driver 0: cannot open device '/dev/snd/pcmC0D0p': Device or resource busy

Will you please tell me how to resolve this issue.

Regards,