[alsa-devel] WM9712 Not Giving output

[Marek Vasut]

Dne Friday 01 of August 2008 19:59:44 Nitin Mahajan napsal(a):
> HI!
>
> --- On Fri, 1/8/08, Marek Vasut <marek.vasut at gmail.com> wrote:
> > From: Marek Vasut <marek.vasut at gmail.com>
> > Subject: Re: [alsa-devel] WM9712 Not Giving output
> > To: alsa-devel at alsa-project.org, nitinm76 at yahoo.com
> > Date: Friday, 1 August, 2008, 11:10 PM
> > Dne Friday 01 of August 2008 19:27:24 Nitin Mahajan
> >
> > napsal(a):
> > > HI!
> > >
> > > --- On Fri, 1/8/08, Mark Brown
> >
> > <broonie at opensource.wolfsonmicro.com> wrote:
> > > > From: Mark Brown
> >
> > <broonie at opensource.wolfsonmicro.com>
> >
> > > > Subject: Re: [alsa-devel] WM9712 Not Giving
> >
> > output
> >
> > > > To: "Nitin Mahajan"
> >
> > <nitinm76 at yahoo.com>
> >
> > > > Cc: alsa-devel at alsa-project.org,
> >
> > "Manuel" <mano at roarinelk.homelinux.net>
> >
> > > > Date: Friday, 1 August, 2008, 9:32 PM
> > > > On Fri, Aug 01, 2008 at 08:31:03AM -0700, Nitin
> >
> > Mahajan
> >
> > > > wrote:
> > > > > I am using a WM9712 codec chip with the AC97
> > > >
> > > > controller on AMD AU1250.
> > > >
> > > > > Linux kernel version 2.6.24.2.
> > > > >
> > > > > On AC97 controller's side, I can see the
> >
> > DMA
> >
> > > > happening on the host
> > > >
> > > > > processor, interrupts also coming.
> > > >
> > > > This suggests a mixer configuration problem.
> > > >
> > > > > On the mixer front, I did unmute and set the
> >
> > vol to
> >
> > > > max for PCM and
> > > >
> > > > > Headphone. I did not find any Master control
> >
> > with this
> >
> > > > chip. Isn't
> > > >
> > > > > there any master control with this chip?
> > > >
> > > > No.
> > >
> > > If Master is not there, logically are the enough for
> >
> > playback?
> >
> > > amixer set 'PCM' 255 unmute
> > > amixer set 'Headphone' 255 unmute
> > >
> > > > > Can some one please throw more light on the
> >
> > Mixer
> >
> > > > part, specific to
> > > >
> > > > > this chip.
> > > > >
> > > > > What Mixer controls do I need to set with
> >
> > what values
> >
> > > > for playback and
> > > >
> > > > > capture respectively with this chip?
> > > >
> > > > Check the configuration of the Left HP Mixer and
> >
> > Right HP
> >
> > > > Mixer PCM
> > > > Playback switches.  These should be enabled in
> >
> > order to
> >
> > > > play back via
> > > > the headphone output.
> > >
> > > While writing the reply , the hardware is not with me.
> > > But I wil check these tommorow.
> > >
> > > > If you still can't get audio output with that
> >
> > please
> >
> > > > send a copy of your
> > > > mixer configuration - run the command
> > > >
> > > > 	alsactl store -f mixer-config
> > > >
> > > > to write a file 'mixer-config' with this
> > > > information in it.  Please
> > > > also check your kernel log from when the driver
> >
> > is loaded
> >
> > > > and when you
> > > > configure the mixer.
> > > >
> > > > There is documentation of the audio paths
> >
> > supported by the
> >
> > > > chip in the
> > >
> > > I saw the figure in  the datasheet, its quite
> >
> > explainatory, as to which
> >
> > > registers are involved in which path.
> > >
> > > > datasheet, available from:
> > > >
> > > > 	http://www.wolfsonmicro.com/products/WM9712/
> > > >
> > > >
> > > > and you may find the audio route mappings in the
> >
> > WM9712
> >
> > > > driver useful to
> > > > refer to - the 'audio_map' table in the
> >
> > driver
> >
> > > > which shows how the parts
> > > > of the device are connected.  The format is {
> >
> > destination,
> >
> > > > control,
> > > > source }.
> > >
> > > Thanks and regards
> > >
> > > -Nitin
> > >
> > > Send instant messages to your online friends
> >
> > http://uk.messenger.yahoo.com
> >
> > > _______________________________________________
> > > Alsa-devel mailing list
> > > Alsa-devel at alsa-project.org
> >
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> >
> > Hi,
> > try searching the mailing list for "[PATCH] wm9712
> > mono mixer". That may help
> > you.
>
> Interesting, do you mean that "Right HP Mixer" and "Left HP Mixer" should
> be "Right Mixer" and "Left Mixer" ?
>
> thanks and regards
>
> -Nitin

yea, and you should see alsa warning about it in kernel log as well.
>
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