[alsa-devel] RFC: Jack-detection control elements on HD-audio
tiwai at suse.de
Fri Jun 19 11:02:27 CEST 2009
At Fri, 19 Jun 2009 10:54:00 +0200 (CEST),
Jaroslav Kysela wrote:
> On Fri, 19 Jun 2009, Takashi Iwai wrote:
> > Hi,
> > yet another thing I've worked recently on is a bit more generalized
> > framework for jack-sense reporting for HD-audio. This supersedes the
> > existing jack-sense reporting via the input layer. In addition, it
> > gives the corresponding control elements.
> > For example, you'll have "Jack HP-Out" (or a bit more verbose like
> > "Jack HP-Out at Ext Rear") control via control API as well as other
> > mixer controls. This can notify when a jack is plugged/unplugged.
> > But, another big win is that you can read the current pin sense just
> > by reading this element.
> Before definining such extension, I would really see to define standard
> control names in Documentation/ControlNames.txt file. It seems to me that
> most new drivers does not follow suggested naming. The document should be
> reviewed, of course.
That's true. We definitely need a standard naming.
But note that these controls are no mixers but provided as IFACE_CARD,
so they won't pollute the mixer abstraction. So, it's rather the
question of the user of these controls.
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