On Wed, Apr 15, 2026 at 05:19:41PM +0900, Chancel Liu wrote: > Some audio systems require specific DAPM widgets to remain powered > during system suspend. Introduce a generic and reusable mechanism in > the ASoC core to mark selected DAPM widgets as ignore_suspend. > > The unified mechanism consists of two parts: > 1. Parse and store the name list of widgets to ignore suspend in > struct snd_soc_card > > The list of widgets can be provided either by the machine driver or > parsed from Device Tree. Different machines have different routing and > power requirements. Each machine can specify its own widgets to ignore > suspend through DT property. It enables flexible policy without hard > code. A new helper, snd_soc_of_parse_ignore_suspend_widgets() is added > for this purpose. > > 2. Apply ignore_suspend flags during snd_soc_bind_card() > > After all components have been probed and all DAPM widgets have been > registered, snd_soc_bind_card() performs a unified lookup of the > configured widget names across all DAPM contexts of the card and marks > the matching widgets with ignore_suspend = 1. > > Signed-off-by: Chancel Liu <[email protected]> > --- ... > @@ -3294,6 +3298,45 @@ int snd_soc_of_parse_aux_devs(struct snd_soc_card > *card, const char *propname) > } > EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs); > > +int snd_soc_of_parse_ignore_suspend_widgets(struct snd_soc_card *card, > + const char *propname)
propname is fixed value "ignore-suspend-widgets"，needn't this agument. you funciton include "ignore_suspend_widgets", suppose only parse property. ignore_suspend_widgets Frank
