[alsa-devel] [PATCH 3/3] ALSA: hda - Use auto_mute_via_amp=1 for VT1708

Takashi Iwai tiwai at suse.de
Mon Jun 24 16:32:57 CEST 2013

We've got bug report wrt many machines with VT1708 (e.g. IBM POS
machines) showing the broken auto-mute behavior.  It turned out that
the problem is that the pin control values of the speaker and line-out
pins are completely ignored.  As a workaround, let's use the newly
introduced feature of the generic parser, to control the mute via amp
on pins.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
 sound/pci/hda/patch_via.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index dcebf3c..e2481ba 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -741,6 +741,8 @@ static int patch_vt1708(struct hda_codec *codec)
 	/* don't support the input jack switching due to lack of unsol event */
 	/* (it may work with polling, though, but it needs testing) */
 	spec->gen.suppress_auto_mic = 1;
+	/* Some machines show the broken speaker mute */
+	spec->gen.auto_mute_via_amp = 1;
 	/* Add HP and CD pin config connect bit re-config action */
 	vt1708_set_pinconfig_connect(codec, VT1708_HP_PIN_NID);

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