[alsa-devel] [PATCH] ALSA: ASoC: cs4720: use snd_soc_cache_sync()

Daniel Mack zonque at gmail.com
Tue Nov 22 16:41:42 CET 2011

On 11/22/2011 04:37 PM, Timur Tabi wrote:
> Mark Brown wrote:
>> That's very odd, not ringing any bells at all.  It's not like the 
>> existing code is trying to do anything clever with skipping writes,
>> it just blasts in all the register values and it's affecting two
>> different registers.
> Is there a quick-and-dirty way to test suspend/resume?  It's not
> officially supported on our board with a CS4270, so I never tried it,
> and I'm not familiar with it.

echo mem > /sys/power/state

But in our case, the codec is powered off completely, so you might have
a very different power regulator setup on your board. And that might
cause the bug not to show up, as it retains its register values over


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