[alsa-devel] Dealing with 'siamesed' DAC sample rates

[Takashi Iwai]

At Thu, 30 Aug 2007 12:42:10 -0700,
John Utz wrote:
> 
> > It seems like the right thing to do would be to check if any other
> > DACs are in use.
> 
> perhaps, but i dont think that there is a 'DAC IN USE' function. Are
> you aware of one?

Not in the ac97_codec side.
Usually the rate-lock over streams is implemented in the controller
side.  The driver knows which PCM (sub)stream is opened, so you can
add hw_params constraint appropriately.


Takashi