[alsa-devel] Audio:suspend to ram issue

[Rajeev kumar]

Hello Mark
In the continuation of the last mail.I run alsa_aplay and the WAV file 
sounds.
Then press ctrl-z - aplay will go to background(suspend state) and i2s 
is stopped.
Then type fg and the audio  restart.
Is there any difference between these two suspend  ctrl-z and echo mem > 
/sys/power/state.
In both the cases trigger will call with cmd value '1 ' in case of 
resume and '0' in case of suspend.

While going through the alsa framework I found that suspend and resume 
functionality is handled by
the framework itself.Please correct me if my understanding is not correct.

Best Regards
Rajeev


On 8/18/2011 11:35 AM, Rajeev kumar wrote:
>
> Hi Mark
> I am not sure about the behavior in case of audio suspend/resume.
>
> I tested the audio driver with aplay and then suspended to ram (using 
> echo mem > /sys/power/state). After pressing wake to resume,
> the audio does not play unless aplay is closed and re-run.  Do we 
> expect the audio suspend/resume to work?
>
> In the platform trigger part I am doing nothing and in case of 
> cpu(i2s) , just disabling the i2s.
>
> Best Regards
> Rajeev