ALSA: hda - Add a fake mute feature

[pandora-kernel.git] / sound / pci / hda / hda_codec.c

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 05c8768..f3be54e 100644 (file)
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1795,7 +1795,11 @@ static void put_vol_mute(struct hda_codec *codec, struct hda_amp_info *info,
        parm = ch ? AC_AMP_SET_RIGHT : AC_AMP_SET_LEFT;
        parm |= direction == HDA_OUTPUT ? AC_AMP_SET_OUTPUT : AC_AMP_SET_INPUT;
        parm |= index << AC_AMP_SET_INDEX_SHIFT;
-       parm |= val;
+       if ((val & HDA_AMP_MUTE) && !(info->amp_caps & AC_AMPCAP_MUTE) &&
+           (info->amp_caps & AC_AMPCAP_MIN_MUTE))
+               ; /* set the zero value as a fake mute */
+       else
+               parm |= val;
        snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, parm);
        info->vol[ch] = val;
 }
@@ -2062,7 +2066,7 @@ int snd_hda_mixer_amp_tlv(struct snd_kcontrol *kcontrol, int op_flag,
        val1 = -((caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT);
        val1 += ofs;
        val1 = ((int)val1) * ((int)val2);
-       if (min_mute)
+       if (min_mute || (caps & AC_AMPCAP_MIN_MUTE))
                val2 |= TLV_DB_SCALE_MUTE;
        if (put_user(SNDRV_CTL_TLVT_DB_SCALE, _tlv))
                return -EFAULT;