Re: [PATCH 6/7] ASoC: SDCA: Device boot into the system suspend process

[Charles Keepax <ckeepax@opensource.cirrus.com>]

On Tue, Dec 09, 2025 at 12:18:09PM +0000, Pierre-Louis Bossart wrote:
> On 11/25/25 15:21, Charles Keepax wrote:
> > +	/*
> > +	 * FDL has to run from the system resume handler, at which point
> > +	 * pm_runtime isn't yet active.
> > +	 */
> 
> aren't there cases where FDL also needs to run in a pm_runtime
> resume case?

Potentially, depends if someone builds a system that does that.

> My understanding of FDL is that the host would *always* check
> if the device lost context and if firmware is required then the
> download takes place. I am not sure why we need the assumption
> that firmware is *only* required for system resume?

Mostly because it seems that is pretty standard for PC systems,
to only drop rails on hibernate.

But the primary issue I have is the "check if the device lost
context" part. I don't see a good way to implement that under
SDCA. If we figure out a good way to do that then most of my
objections to allowing the firmware download on runtime resume
go away.

Thanks,
Charles