snd_hda_intel/sst-acpi sound breakage on suspend/resume since 5.6-rc1

[Dominik Brodowski]

On Wed, Mar 18, 2020 at 07:27:58PM +0100, Cezary Rojewski wrote:
> On 2020-03-18 17:20, Dominik Brodowski wrote:
> > On Wed, Mar 18, 2020 at 10:13:54AM -0500, Pierre-Louis Bossart wrote:
> > > > > > While 5.5.x works fine, mainline as of ac309e7744be (v5.6-rc6+) causes me
> > > > > > some sound-related trouble: after boot, the sound works fine -- but once I
> > > > > > suspend and resume my broadwell-based XPS13, I need to switch to headphone
> > > > > > and back to speaker to hear something. But what I hear isn't music but
> > > > > > garbled output.
> 
> > 
> > I had (see 18d78b64fddc), but not any more in years (and I'd like to keep
> > using I2S, which has worked flawlessly in these years).
> > 
> 
> Due to pandemic I'm working remotely and right now won't be able to test
> audio quality so focusing on the stream==NULL issue. And thus we got to help
> each other out : )

Sure, and thanks for taking a look at this!

> Could you verify issue reproduces on 5.6.0-rc1 on your machine?

It reproduces on 5.6.0-rc1 + i915-bugfix. I'm trying to bisect it further in
the background, but that may take quite some time.

Thanks,
	Dominik