[alsa-devel] ALSA and MediaController

[Takashi Iwai]

At Tue, 17 May 2011 11:02:28 -0700,
Mark Brown wrote:
> 
> On Tue, May 17, 2011 at 12:48:59PM -0500, pl bossart wrote:
> 
> > - Is the list of ALSA controls is completely defined after the card
> > initialization step? Or do we have cases where ALSA controls are
> > created dynamically after the init? I tend to believe the former is
> > true but want to verify this with others on the mailing list. It's my
> > understanding that only connections may be changed in such a graph.
> 
> Currently it is static for at least ASoC but I'd expect this will change
> as the DSP stuff gets more advanced.

There are actually cases where controls are dynamically
created/removed.  We had it in some drivers, but I don't remember
whether we still keep it or changed in a different way.
Anyway, the alsa-lib API also can notify the event per
addition/removal of controls, too.


Takashi