Every ALSA driver is calling these for suspend snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); snd_pcm_suspend_all(pcm[i]); And for resume snd_power_change_state(card, SNDRV_CTL_POWER_D0) In ALSA ASoC no driver is calling any of this, even not in soc-core.c My driver is an ASoC driver and I am also not calling these functions Will this cause any Issue? Thanks On 5/25/07, Takashi Iwai <tiwai@xxxxxxx> wrote: > At Fri, 25 May 2007 11:27:10 +0530, > Nobin Mathew wrote: > > > > I am implementing power management in my ALSA sound drivers. ALSA > > drivers are not working properly after resume. All registers values > > are proper and I am able to read back the codec register contents. > > > > If I do a playback after resume then I am getting lots of "underrun". > > As Liam already pointed, the underrun is usually irrelevant from the > codec registers, as codec chips don't control the DMA transfer. > So, it's likely a controller side problem. > > > After a reboot playback is working fine. > > > > Is there any known issues with ALSA power management? > > No. Some drivers may have, but no problem in general. > > > Why Ubuntu and Redhat does ALSA modules removal before suspend and > > insertion after resume? > > They are either too lazy or too conservative :) > > > Takashi > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
