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.