Re: [PATCH v2 2/3] ASoC: soc-core: Add core support for ignoring suspend on selected DAPM widgets

Frank Li
2026-04-17T11:15:14Z

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 <chancel.liu@nxp.com>
> ---
...
> @@ -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