[alsa-devel] Intel dg45id motherboard - ICH10 HD audio issues

[Takashi Iwai]

At Wed, 22 Oct 2008 09:48:11 +1100,
Anton Blanchard wrote:
> 
> 
> Hi Takashi,
> 
> > > I was unable to get sound to work (analog or SPDIF) on my dg45id using
> > > 2.6.27. After looking at the pinout information I made a quick hack to
> > > get SPDIF out going (it's a mythtv box so thats all I need):
> > > 
> > > Index: linux-source-2.6.27/sound/pci/hda/patch_sigmatel.c
> > > ===================================================================
> > > --- linux-source-2.6.27.orig/sound/pci/hda/patch_sigmatel.c	2008-08-31 11:06:37.000000000 +1000
> > > +++ linux-source-2.6.27/sound/pci/hda/patch_sigmatel.c	2008-08-31 11:07:14.000000000 +1000
> > > @@ -3591,7 +3591,7 @@
> > >  	spec->num_pwrs = ARRAY_SIZE(stac92hd73xx_pwr_nids);
> > >  	spec->pwr_nids = stac92hd73xx_pwr_nids;
> > >  
> > > -	err = stac92xx_parse_auto_config(codec, 0x22, 0x24);
> > > +	err = stac92xx_parse_auto_config(codec, 0x26, 0x24);
> > >  
> > >  	if (!err) {
> > >  		if (spec->board_config < 0) {
> > > 
> > > And pointed mythtv at ALSA:plughw:0,1. Quick and dirty I know :)
> > > 
> > > Details of the chipset are below.
> > 
> > Thanks.  There seems two problems behind.
> > 
> > - the codec has two SPDIF outputs but the driver assumes only the
> >   first one
> > - the driver wrongly probes the pin widget instead of audio-out
> >   widget
> > 
> > So, your patch fixes only the latter problem which is specific to your
> > device.
> > 
> > Could you rewrite the patch to probe the pin first?  That is, check
> > the availability of pin 0x22 and 0x23.  If one of them is available,
> > pick the corresponding audio-out widget (0x25 and 0x26).
> 
> I'm going to need some help here, I have very little understanding of
> ALSA. Could you give me a quick rundown on how to probe pins or point me
> at an example in code?

Could you try the latest sound tree?
    git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git

There have been many changes regarding SPDIF on IDT/STAC codecs, and
your problem might have been already fixed.


thanks,

Takashi