Re: [PATCH] ASoC: fsl_audmix: switch regmap to cache-only mode after probe

[Shengjiu Wang]

On Tue, Jun 16, 2026 at 6:48 PM Mark Brown <broonie@xxxxxxxxxx> wrote:
>
> On Tue, Jun 16, 2026 at 11:00:38AM +0800, shengjiu.wang@xxxxxxxxxxx wrote:
> > From: Shengjiu Wang <shengjiu.wang@xxxxxxx>
> >
> > After pm_runtime_enable() the AUDMIX hardware block is powered off and
> > remains suspended until the first runtime resume. Any register write
> > issued between probe() and the first resume (for example from DAPM or
> > ALSA control paths) would target unpowered hardware and be silently
> > lost.
>
> >       platform_set_drvdata(pdev, priv);
> >       pm_runtime_enable(dev);
> > +     regcache_cache_only(priv->regmap, true);
>
> How does the cache get turned off again when runtime PM is configured
> off?  I'd expect the device to probe powered up and then be powered down
> and put into cache only mode as a result of runtime PM running.

Thanks for the comments.
Yes. need to consider when runtime PM off case.  I will refine it.

Best regards
Shengjiu Wang