On Tue, Oct 4, 2022 at 12:46 PM Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> wrote: > > On 10/4/22 11:07 AM, Daniel Baluta wrote: > > Hello all, > > > > It looks like system suspend is not implemented for Compress streams. > > > > Any story behind this? Were there any attempts on implementing this? > > It depends on the definition of 'system suspend'. > > What we had in mind back in the early 2010s was to allow for 'active > suspend' aka S0ix or low-power playback. That was the main reason for > introducing the API. > > For suspend to S3/D3, the plan was to just completely stop any > playback/capture and restart on resume. I am not sure if this was ever > implemented, that may be a miss. I see. Yes, we are looking at S3/D3 suspend and this doesn't look to be implemented. > > There is a corner case we may have overlooked. I am not sure what > happens if the S3/D3 suspend while playing. This is supported with e.g. > aplay but for the compressed case it's a bit more complicated. Not all > formats support rendering for a random position. True. We want to implement the same behavior as for aplay. Stop any playback/capture and restart on resume. Thanks!
