[alsa-devel] HDA intel, wired headset w/mic, jack mic detect

[Takashi Iwai]

At Tue, 6 Mar 2012 09:28:12 +0800,
Raymond Yau wrote:
> 
> 2012/3/6, Kevin Hilman <khilman at ti.com>:
> > Raymond Yau <superquad.vortex2 at gmail.com> writes:
> >
> >> 2012/3/3, Kevin Hilman <khilman at ti.com>:
> >>> Raymond Yau <superquad.vortex2 at gmail.com> writes:
> >>>
> >>>> 2012/3/2, Kevin Hilman <khilman at ti.com>:
> >>>>
> >>>>
> >>>>>> Does your headset/mic has a TRRS (Tip, ring, ring, sleeve) connector
> >>>>>> instead of TRS (Tip, ring, sleeve) connector ?
> >>>>
> >>>>> Yes.  It's TRRS.
> >>>>
> >>>> Does it mean that the headset/mic is a mono mic ?
> >>>>
> >>>> Is the internal mic mono or stereo ?
> >>>
> >>> I believe it's mono.  Based on vumeter activity, and the fact that
> >>> changing only one slider in hda_analyzer is needed to quiet/mute the
> >>> mic.
> >>>
> >>
> >> Not sure any difference between cs4206 and cs4207
> >>
> >> It seem that you can select ADC1 and ADC2 channel mode in cs4207
> >
> >> ‘00’b - ADC2 left channel is mapped to HDA left
> >> channel and ADC2 right channel is mapped HDA
> >> right channel (normal mode).
> >> ‘01’b - ADC2 left channel is mapped to both HDA
> >> left and right channels. ADC2 right channel is
> >> discarded (mono mode).
> >> ‘10’b - ADC2 right channel is mapped to both
> >> HDA left and right channels. ADC2 left channel is
> >> discarded (alternate mono mode).
> >> ‘11’b - ADC2 left channel is mapped to HDA right
> >> channel and ADC2 right channel is mapped to
> >> HDA left channel (channel swap mode).
> >
> > Do any of the hda tools allow me to tweak this from userspace?
> >
> >
> 
> you should ask Takarshi as he added this patch, he may know whether
> cs4206 support the above feature
> 
> http://git.kernel.org/?p=linux/kernel/git/tiwai/sound.git;a=commitdiff;h=40c20fa05a29766565f56ede17d0ffa539e1c9a9;hp=ea35929b886975a240660b3ba6c61826761731ad

You can play with hda-emu to send vendor-specific COEF, as found in
the commit above.  But it's at your own risk; the patch I made is just
a translation from other information I've got from Cirrus at that
time.

At best, ask Cirrus guys such information.


Takashi