AIC3101 snd_pcm_open open error

Steven Weng1

Expert 2200 points

Hi All,

I am using AIC3101 audio codec and using alsa arecord & aplay to do functional test:

arecord -f CD -D hw:0,0 test.wav

aplay -f CD -D hw:0,0 test.wav

Everything is OK!

But I met the below error when execute the following command after system boot...

# arecord -f CD -D hw:0,0 | aplay -f CD -D hw:0,0
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
aplay: main:696: audio open error: Invalid argument

I workaround this issue by execute the following command first after system boot...

# arecord -f CD -D hw:0,0 test.wav

ctrl+c stop...

# arecord -f CD -D hw:0,0 | aplay -f CD -D hw:0,0
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

It seems that codec is not ready for playback after system boot.

is it hardware issue? or codec initialization have something wrong?

Any helps will be very appreciate!!

thanks

over 9 years ago

0 Don Dapkus over 9 years ago

TI__Guru**** 189399 points

Hi, Stephen,

Please see our wiki. We have addressed the driver issue. You can find the wiki link here.

-d2

0 Steven Weng1 over 9 years ago in reply to Don Dapkus

Expert 2200 points

Hi Don,

Thank you very much.

I am using 2.6.37 kernel now and tried to implement these modifies in my kernel source tree.

But there are some defines lost in my kernel souce code.

Sorry I am new to linux kernel driver...Could you give me some clues about upgrading this driver in my kernel?

Where could I find the change list or patch about these modifies?

Thanks in advance. Any helps will be appreciate.

Steven

0 Don Dapkus over 9 years ago in reply to Steven Weng1

TI__Guru**** 189399 points

Hi, Steven,

Unfortunately, we don't directly support the drivers. Hopefully, someone in the Community can share their experience with you.

-d2

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AIC3101 snd_pcm_open open error