On Wed, Dec 18, 2019 at 08:54:27AM -0600, Pierre-Louis Bossart wrote:

> Even for dai links, it's not clear to me what .ignore_suspend means.

It means exactly what it says, don't do anything on suspend.

> For Intel machine drivers, the .ignore_suspend flag is used for DMIC links
> which may be used in S0ix/D0ix states. I don't believe this works if there
> are multiple target states, e.g. you would probably want to leave the link
> active in S0ix, but suspend it in S3?

> I think the current .ignore_suspend settings only work with the assumption
> that applications will close all capture streams before going to S3.

These numbered suspend states are a platform specific concept, other
systems will typically just suspend or not suspend.  It sounds like this
feature does not map onto your systems.