[alsa-devel] [PATCH] fix headphone settings and master volume (Conexant CX20551 0x103c30b2)

[Gregorio Guidi]

On Thursday 12 March 2009 07:43:27 Takashi Iwai wrote:
> At Wed, 11 Mar 2009 22:22:39 +0100,
>
> Gregorio Guidi wrote:
> > On Tuesday 10 March 2009 15:49:38 Takashi Iwai wrote:
> > > At Mon, 9 Mar 2009 20:19:35 +0100,
> > >
> > > ...
> > >
> > > Thanks, that helps for debugging.
> > >
> > > Looking through the current patch_conexant.c, there are other messy
> > > codes there, too.  So I cleaned up and fixed it on sound git tree
> > > now.  Any chance to try it out?  The GIT tree is found at:
> > >
> > >    git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> >
> > I managed to test a kernel snapshot with the latest changes, thanks for
> > taking the time to refactor and clean up the code there.
>
> Thanks for testing.
>
> > There are still issues, though: at the moment, the "Speaker" control does
> > not work. Consequently, automute does not work and Master only controls
> > headphones.
>
> Hm, doesn't "Speaker" give any change if you unplug the headphone?
> It should change the output volume of widget 0x1d.  If it's true, there
> can be a few reasons:
>
> A. The real speaker output pin isn't 0x1d but another pin
>
> B. The widget 0x1d has a problem with connection to 0x19
>
> C. The widget 0x1d has no output amp control despite the description

To clarify: the speakers make sounds, but volume control and muting do not 
work.

Actually, now that I start to understand how these widget connections work, I 
see the problem is simpler: after changing the 0x1d connection (routing the 
speakers to 0x19) with {0x1d, AC_VERB_SET_CONNECT_SEL, 0x1}, you have to 
update the other places where the 0x1d widget is used (see patch). This also 
explains the problem originally reported where Headphone didn't work (here and 
in bug #3091).

With just the following patch applied on top of the git tree everything works 
nicely (Headphone, Speaker, Master, automute all work as expected).

diff -Nur sound-2.6.git.orig/sound/pci/hda/patch_conexant.c 
sound-2.6.git/sound/pci/hda/patch_conexant.c
--- sound-2.6.git.orig/sound/pci/hda/patch_conexant.c   2009-03-12 
14:56:20.000000000 +0100
+++ sound-2.6.git/sound/pci/hda/patch_conexant.c        2009-03-12 
14:29:48.000000000 +0100
@@ -1196,7 +1196,7 @@
         * the headphone jack
         */
        bits = (!spec->hp_present && spec->cur_eapd) ? 0 : HDA_AMP_MUTE;
-       snd_hda_codec_amp_stereo(codec, 0x1d, HDA_OUTPUT, 0,
+       snd_hda_codec_amp_stereo(codec, 0x1d, HDA_OUTPUT, 0x01,
                                 HDA_AMP_MUTE, bits);
        bits = spec->cur_eapd ? 0 : HDA_AMP_MUTE;
        snd_hda_codec_amp_stereo(codec, 0x13, HDA_OUTPUT, 0,
@@ -1214,7 +1214,7 @@
                                     AC_VERB_GET_PIN_SENSE, 0) & 0x80000000;

        bits = (spec->hp_present || !spec->cur_eapd) ? HDA_AMP_MUTE : 0;
-       snd_hda_codec_amp_stereo(codec, 0x1d, HDA_OUTPUT, 0,
+       snd_hda_codec_amp_stereo(codec, 0x1d, HDA_OUTPUT, 0x01,
                                 HDA_AMP_MUTE, bits);
 }

@@ -1276,7 +1276,7 @@
 };

 static struct snd_kcontrol_new cxt5047_hp_spk_mixers[] = {
-       HDA_CODEC_VOLUME("Speaker Playback Volume", 0x1d, 0x00, HDA_OUTPUT),
+       HDA_CODEC_VOLUME("Speaker Playback Volume", 0x1d, 0x01, HDA_OUTPUT),
        HDA_CODEC_VOLUME("Headphone Playback Volume", 0x13, 0x00, HDA_OUTPUT),
        {}
 };