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| author |   Clemens Ladisch <clemens@ladisch.de> | 2010-10-15 10:32:50 +0200 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2010-10-17 10:45:30 +0200 |
| commit | de8c85f7840e5e29629de95f5af24297fb325e0b (patch) | |
| tree | 79f9a1cff3ff4b5baec72186f5d0709803b9125e /sound/pci/hda/patch_sigmatel.c | |
| parent | ALSA: HDA: Apply SKU override for Acer aspire 7736z (diff) | |
| download | linux-dev-de8c85f7840e5e29629de95f5af24297fb325e0b.tar.xz linux-dev-de8c85f7840e5e29629de95f5af24297fb325e0b.zip | |
ALSA: HDA: Sigmatel: work around incorrect master muting
The HDA specification does not allow for a codec to mute itself just
because the volume is reduced, so _of course_ somebody had to go and do
it. This wouldn'\''t hurt too much when the volume is adjusted by hand,
but programs like PA that try to set the volume automatically could
inadvertently mute the output.
To work around this, change the TLV dB information for the Master volume
on all Sigmatel HDA codecs to indicate the the minimal volume setting
actually mutes.
Reported-by: Colin Guthrie <gmane@colin.guthr.ie>
Reported-by: "Alexander E. Patrakov" <patrakov@gmail.com>
Tested-by: Colin Guthrie <cguthrie@mandriva.org>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | sound/pci/hda/patch_sigmatel.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c index d8dfafeab80e..1a563a2fbbec 100644 --- a/sound/pci/hda/patch_sigmatel.c +++ b/sound/pci/hda/patch_sigmatel.c @@ -992,7 +992,7 @@ static struct hda_verb stac9205_core_init[] = { } static struct snd_kcontrol_new stac9200_mixer[] = { - HDA_CODEC_VOLUME("Master Playback Volume", 0xb, 0, HDA_OUTPUT), + HDA_CODEC_VOLUME_MIN_MUTE("Master Playback Volume", 0xb, 0, HDA_OUTPUT), HDA_CODEC_MUTE("Master Playback Switch", 0xb, 0, HDA_OUTPUT), HDA_CODEC_VOLUME("Capture Volume", 0x0a, 0, HDA_OUTPUT), HDA_CODEC_MUTE("Capture Switch", 0x0a, 0, HDA_OUTPUT), @@ -1020,7 +1020,7 @@ static struct snd_kcontrol_new stac92hd71bxx_loopback[] = { }; static struct snd_kcontrol_new stac925x_mixer[] = { - HDA_CODEC_VOLUME("Master Playback Volume", 0x0e, 0, HDA_OUTPUT), + HDA_CODEC_VOLUME_MIN_MUTE("Master Playback Volume", 0xe, 0, HDA_OUTPUT), HDA_CODEC_MUTE("Master Playback Switch", 0x0e, 0, HDA_OUTPUT), { } /* end */ }; @@ -1144,6 +1144,8 @@ static int stac92xx_build_controls(struct hda_codec *codec) HDA_OUTPUT, vmaster_tlv); /* correct volume offset */ vmaster_tlv[2] += vmaster_tlv[3] * spec->volume_offset; + /* minimum value is actually mute */ + vmaster_tlv[3] |= 0x1000; err = snd_hda_add_vmaster(codec, "Master Playback Volume", vmaster_tlv, slave_vols); if (err < 0) |