[alsa-devel] [PATCH 1/4] ALSA: Added jack detection kcontrol support

Takashi Iwai tiwai at suse.de
Mon Jul 29 14:05:52 CEST 2013

At Sat, 27 Jul 2013 13:25:24 +0100,
Mark Brown wrote:
> On Fri, Jul 26, 2013 at 04:13:40PM -0700, Felipe Tonello wrote:
> > On Fri, Jul 26, 2013 at 3:48 PM, Mark Brown <broonie at kernel.org> wrote:
> > >> > What I'd expect to happen here is that for multi function jacks we
> > >> > create a control per function if the controls are valid.
> > Ok, so the idea is just to change the control to type integer instead
> > of boolean, right?
> > Because as you say, the user will be able to check the type of jack
> > based on the status value, right?
> It might be more idiomatic and more compatible with userspace to create
> multiple controls for the jack, there was some discussion of this in the
> past I think but I can't remember the result.

I also forget the end result :)

Another option would be to make an enum control, but multiple boolean
controls are easier in the end.  The headset controls of HD-audio are
represented in that way, too (because HD-audio specification can't
tell better).


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