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

[Mark Brown]

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.

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