[alsa-devel] [PATCH v5] ASoC: add RT286 CODEC driver

[Takashi Iwai]

At Thu, 13 Mar 2014 19:29:02 +0000,
Mark Brown wrote:
> 
> On Thu, Mar 13, 2014 at 09:52:14AM +0100, Takashi Iwai wrote:
> 
> > different values for get and set.  And, yet more tricky part is the
> > amplifier verbs.  These aren't suitable with regmap caching,
> > unfortunately.
> 
> We don't really *need* the cache, it just makes it easier to do resume
> and gives a bit of a performance boost.

Well, the caching isn't just a bit.  Without caching, you'd have to
whip the sound hardware powered up/down at each time querying the
current mixer value.

My point is only that the design of HD-audio is so plain ugly :)


Takashi