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

[vinothkumars]

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,

[vinothkumars]

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

XTOR, CS422888, WM8960.

[AldoG]

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.

[vinothkumars]

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,