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

[Keyon Jie]

On 3/20/20 1:35 AM, Mark Brown wrote:
> On Thu, Mar 19, 2020 at 12:21:47PM -0500, Pierre-Louis Bossart wrote:
>> On 3/19/20 11:51 AM, Dominik Brodowski wrote:
> 
>>> That patch fixes the issue(s). I didn't even need to revert 64df6afa0dab
>>> ("ASoC: Intel: broadwell: change cpu_dai and platform components for SOF")
>>> on top of that. But you can assess better whether that patch needs care for
>>> other reasons; for me, this one-liner you have suggested is perfect.
> 
> Good news!
> 
>> .ignore_suspend is set for bdw-rt5677.c and bdw-rt5650.c as well. I don't
>> know if that was intentional.
> 
> The intended use case is for applications doing audio during suspend
> like telephony audio between the modem and CODEC on a phone or
> compressed audio playback.  I guess the compressed audio playback case
> could possibly apply with these systems though x86 suspend/resume is
> usually sufficiently heavyweight that it's surprising.

I think that's true, on many of SKL- intel platforms(byt, hsw, bdw), we 
are seeing this .ignore_suspend set with offload or deep buffer FE 
dai_links configured together.

So it looks we can't ignore calling codec's suspend/resume callbacks 
during the power cycle for rt286 codec(on the Dell XPS here), which is 
actually supported on Chromebook SAMUS(rt5677)?

Thanks,
~Keyon

>