Hi > On Thu, Apr 18, 2019 at 10:15:24AM +0000, S.j. Wang wrote: > > > On Thu, Apr 18, 2019 at 02:00:12AM -0700, Nicolin Chen wrote: > > > > On Thu, Apr 18, 2019 at 03:29:09AM +0000, S.j. Wang wrote: > > > > > Just for curiosity, we had similar situation on imx6sx, so we > > > > added suspend/resume with regcache. Why will the clock enable > > > > state be lost too? Does CCM on imx8 (might not be called CCM > > > > though) have any difference? What about clock rate settings? > > > > That sounds like a bug somewhere else - I'd expect that after resume > > > the clocking would be restored to the state it was in before suspend. > > > There is limitation in our internal design. That is in imx8 the power > > of subsystem will be disabled at suspend, include the clock state , clock > rate. > > Right, that's fairly normal but usually it'd be restored as part of the resume > process? > > > This patch is to enable the pm runtime, so I think it is better to > > move the clock operation to pm runtime, and close the clock at > > suspend to reduce the power. > > It's definitely good to turn the clock off as much as possible, yes. Thanks, will send v2. Best regards Wang shengjiu _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
