[alsa-devel] channel map for intel8x0

[Takashi Iwai]

At Wed, 6 Nov 2013 10:45:32 +0800,
Raymond Yau wrote:
> 
> \
> 
> > > > >
> > > > > > Refer to patch ALSA: Implement channel maps for standard onboard
> > AC97
> > > > > > drivers
> > > > > >
> > > > > > e36e3b86c78cee9c7435eb33e0ef8a788193e812<
> > > > >
> > https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/intel8x0.c?id=e36e3b86c78cee9c7435eb33e0ef8a788193e812
> > > > > >
> > > > > >
> > > > > > It seem that channal map is not working when testing with
> > > > > > alsa-lib/test/chmap.c with the emulated intel8x0 inside virtualbox
> > > > >
> > > > > What doesn't work actually?  The lack of chmap for the capture?
> > > > > Please give a bit more explanations about your problem.
> > > > >
> > > > >
> > > >  /alsa-lib/test$ ./chmap -Dhw:0,0 query
> > > > Cannot query maps
> > >
> > > OK.  An untested fix patch is below.
> >
> > Let me know if the patch worked.  Then I'll apply it with Cc to
> > stable.
> >
> >
> > thanks,
> >
> > Takashi
> >
> >
> > > Meanwhile, most of drivers don't provide the chmap for the capture
> > > direction just because they are up to two channels, and obviously it's
> > > only FL/FR.  The chmap support has been added for drivers of consumer
> > > cards that are capable of multi channels.
> > >
> >
> 
> only playback channel map is added in the emulated ICH controller , no
> channel map for capture

As I already mentioned, the chmaps have been added only for multi
channel playback.  Others are only two channels, so no chmap is
added.

> Does it mean that no playback channel map for the other controller ali5455
> SIS7012  ?

It is supported.


Takashi