[alsa-devel] [PATCH 3/3] ARM: SMDK64XX: Enable AC97 device

Mark Brown broonie at opensource.wolfsonmicro.com
Tue Jan 26 11:59:01 CET 2010

On Tue, Jan 26, 2010 at 07:52:45PM +0900, jassi brar wrote:
> On Tue, Jan 26, 2010 at 7:19 PM, Mark Brown

> > This one needs a bit more explanation - why are you changing the AC97
> > slot?  Is this a general problem with the S3C AC97 controller?  It'd
> > also be better to use the symbolic register name rather than a number.

> It is no problem.
> wm9713 can be configured to place data in one of four possible pair of slots
> 3-4 or 6-9 or 7-8 or 10-11. This call ensures the selected pair is 3-4(standard
> and compatible with Samsung AC97 controllers). Though we don't need to
> explicitly set this if we drop mic dai_link.

Ah, OK.  In this case dropping the second DAI link is the better option
- the CODEC only presents a single stereo ADC pair on the AC97 bus with
selectable inputs rather than having separate ADC(s) for microphone(s).
This means you can't run both DAIs in parallel anyway.

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