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

On Tue, Jun 16, 2026 at 11:00:38AM +0800, shengjiu.wang@oss.nxp.com wrote:

From: Shengjiu Wang <redacted>

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.