5.14 regression, Intel SST (BYT) audio no longer works

[Pierre-Louis Bossart]

On 7/17/21 3:59 PM, Hans de Goede wrote:
> Hi All,
> 
> I just noticed and I won't have time to dig any deeper for approx. the
> coming 10 days. Still I wanted to report this in case anyone has any
> ideas. Or maybe you can reproduce and look for a fix ?
> 
> After building + installing 5.14-rc1 on a HP Elitepad 1000 G2
> (Bay Trail) with a RT5642 codec, I noticed that sound over the
> speakers and over the docks line-out jack no longer works.
> 
> Downgrading to 5.13 (without any other changes) fixes this, so this
> seems to be a regression with 5.14.
> 
> I've no been able to make time to test this on other BYT/CHT hardware,
> but I suspect that other models will be affected too.

Thanks Hans for the report, will look into this. 
I can't think of anything that might explain this regression.
I need to update the series to remove device properties so if the baseline is broken I'll see it as well...