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IMX8QM  WM8960 Playback and Recording cannot work at the same time

Question asked by yingjin yan on Mar 15, 2020
Latest reply on Mar 21, 2020 by chen yy

HardWare: IMX8QM MEK B0

Android Version:  Android P (imx-p9.0.0_2.1.1-auto-ga-android_build)

Kernel Version :4.14.98


Play audio using tinyplay and record audio using tinycap, The command is

tinyplay /sdcard/cd.wav

tinycat /sdcard/123.wav

It's normal when played and recorded separately. But start recording while playing audio, the audio file 123.wav has no any voice.

I replace tinycat with android system app of SoundRecorder recording audio, It's the same effect.


Does wm8960 support simultaneous recording and playback? Or does the Sai interface need to be configured in full duplex mode?

Dose anyone have this problem on imx8 or other platform ?

Please give guidance to solve the problem, Thanks!