[alsa-devel] [PATCH] ASoC: WM8983: Initial driver

[Dimitris Papastamos]

On Fri, Jul 15, 2011 at 11:47:41PM +0900, Mark Brown wrote:
> On Fri, Jul 15, 2011 at 01:51:30PM +0100, Dimitris Papastamos wrote:
> > The WM8983 is a low power, high quality stereo CODEC
> > designed for portable multimedia applications. Highly flexible
> > analogue mixing functions enable new application features,
> > combining hi-fi quality audio with voice communication.
> 
> I've applied this but there's one issue you should fix up later:
> 
> > +	/* mute all outputs and set PGAs to minimum gain */
> > +	for (i = WM8983_LOUT1_HP_VOLUME_CTRL;
> > +	     i <= WM8983_OUT4_MONO_MIX_CTRL; ++i)
> > +		snd_soc_update_bits(codec, i, 0x40, 0x40);
> 
> I know you're doing this to minimise artifacts on initial bias raise but
> we should really be doing this without affecting the default register
> settings.

Well, what about using the cache_bypass option to write directly to the
HW?

Thanks,
Dimitris