Re: [alsa-devel] [PATCH v2 2/7] ASoC: soc-core: care .ignore_suspend for Component suspend

...

 Card dai_link has .ignore_suspend, and ALSA SoC cares it when suspend.
 For example, like this

         for_each_card_rtds(card, rtd) {
                 if (rtd->dai_link->ignore_suspend)
                         continue;
                 ...
         }

 But in snd_soc_suspend(), it doesn't care about
 it when suspending Component. This patch cares it.

Morimoto-san,

I am a bit skeptical about this change but I could be wrong. I am not sure if the ignore_suspend field in the DAI link definitions was meant to be applicable for the components as well. Mark/Takashi would have to confirm this.

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

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.