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SubjectRE: [PATCH 0/3] add channel constraint for BDW machine drivers
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> >
> > Apart from review given for each and every patch (although most issues
> > are shared so there is not as much to address) my question is:
> > - are these hw limitations or software (machine board) limitations?

The limitation comes from board. Bdw-rt5677 and Broadwell are using I2S with
2 microphones while Bdw-rt5650 is using PCM TDM with 4 microphones. Our
DSP supports stereo playback and 2 or 4-channel capture (haswell/sst-haswell-pcm.c).


> >
> > Czarek
> >
> >> Brent Lu (3):
> >>    ASoC: bdw-rt5677: channel constraint support
> >>    ASoC: bdw-rt5650: channel constraint support
> >>    ASoC: broadwell: channel constraint support
> >>
> >>   sound/soc/intel/boards/bdw-rt5650.c | 34
> >> ++++++++++++++++++++++++++++++++++
> >>   sound/soc/intel/boards/bdw-rt5677.c | 33
> >> +++++++++++++++++++++++++++++++++
> >>   sound/soc/intel/boards/broadwell.c  | 33
> >> +++++++++++++++++++++++++++++++++
> >>   3 files changed, 100 insertions(+)
> >>
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