[alsa-devel] wm8731 capture -dapm failure

[Liam Girdwood]

On Tue, 2008-09-09 at 16:42 +0100, Alan Horstmann wrote:
> I've started a new thread to avoid confusion, and copied bits here:
> 
> On Monday 08 September 2008 21:51, Mark Brown wrote:
> > On Mon, Sep 08, 2008 at 09:27:13PM +0100, Alan Horstmann wrote:
> > > With just this one change we have been successful in running the codec
> > > over spi.  At present we do have an issue with dapm during capture
> > > -nothing is being turned on!  Any pointers would be appreciated.
> >
> > If you define DEBUG when building soc-dapm.c (a define at the top of the
> > source file will do the trick) then it will be very verbose about the
> > decisions it's making - that will normally point out the problem.
> > Probably either one of the input controls is not configured to make a
> > path from the input pins to the ADC or the input has been mistakenly
> > marked as disabled.
> 
> That gets us lots of info to digest, and it does look like there are no dapm 
> capture paths -listing below.  What we cannot fathom is why!
> 
> Can users of wm8731 confirm successful capture with dapm on any platform?  It 
> is not clear at this stage whether we are looking for a problem on our 
> platform, or a general bug in the driver dapm code.
> 

Afaik, it works on corgi.

> Any assistance would be appreciated.
> 

Could you define your _intended_ input path i.e.

Mic --> Mixer --> ADC

> Alan
> 
> widget ADC
>  HiFi Capture stream Capture event 1
> widget DAC
>  HiFi Playback stream Capture event 1
> reg old 5f new 5f change 0
> reg old 5f new 5f change 0
> DAPM WM8731 snd_soc_dapm_stream_event
> Ext Spk: Off  in 0 out 1
>  in  static LHPOUT
> Int Mic: Off  in 1 out 0
>  out static Mic Bias
> LLINEIN: Off  in 0 out 1
>  out static Line Input
> RLINEIN: Off  in 0 out 1
>  out static Line Input
> MICIN: Off  in 1 out 0
>  in  static Mic Bias
>  out static Mic Bias
> Mic Bias: Off  in 1 out 0
>  in  static Int Mic
>  in  static MICIN
>  out static MICIN
> Line Input: Off  in 0 out 1
>  in  static RLINEIN
>  in  static LLINEIN
>  out Line In Input Mux
> Input Mux: Off  in 0 out 1
>  in  Line In Line Input
>  out static ADC
> ADC: Off  in 0 out 1
>  in  static Input Mux

No valid input to ADC.

We currently have 

R/LLINEIN --> Input Mux --> ADC

but R/LLINEIN are not active. Call snd_soc_dapm_enable_pin(codec, pin)
to activate.

Liam