[alsa-devel] Audio suspend/resume status on OMAP3 based platforms

Peter Ujfalusi peter.ujfalusi at nokia.com
Wed Jan 13 08:10:04 CET 2010

On Tuesday 12 January 2010 18:05:15 ext Aggarwal, Anuj wrote:
> Hi,
> I want to check the status of suspend/resume functionality when audio
> subsystem is being used. Specifically, has some one tried the following
> tests on their omap3 based platforms:
> a) echo mem > /sys/power/state, when audio playback is running in
> background
> b) same command, when audio capture is running in
> background
> b) same command, when audio loopback is running in
> background
> I am facing some issues with (b) & (c) so wanted to confirm whether
> someone else has faced similar problem or not.

As Jarkko pointed out in a separate mail, we should not expect the 
suspend/resume to be working correctly until the context save/restore, and the 
clock management is sorted out.

On the other hand it seams that the problem is in the capture path (b and c 
having issues).

How is the McBSP configured in your setup (master or slave)?
I think we might have different issues with suspend/resume when OMAP McBSP is 
slave or if it is master.


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