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ALSA: hda - Add a fake mute feature 

Some codecs don't supply the mute amp-capabilities although the lowest
volume gives the mute.  It'd be handy if the parser provides the mute
mixers in such a case.

This patch adds an extension amp-cap bit (which is used only in the
driver) to represent the min volume = mute state.  Also modified the
amp cache code to support the fake mute feature when this bit is set
but the real mute bit is unset.

In addition, conexant cx5051 parser uses this new feature to implement
the missing mute controls.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42825

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-02-27 15:00:58 +01:00
parent 7bff172a35
commit 3868137ea4
3 changed files with 30 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sound/pci/hda/hda_codec.c
View File

@ -1759,7 +1759,11 @@ 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;
}
@ -2026,7 +2030,7 @@ 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;

3
sound/pci/hda/hda_codec.h
View File

@ -298,6 +298,9 @@ enum {
#define AC_AMPCAP_MUTE (1<<31) /* mute capable */
#define AC_AMPCAP_MUTE_SHIFT 31
/* driver-specific amp-caps: using bits 24-30 */
#define AC_AMPCAP_MIN_MUTE (1 << 30) /* min-volume = mute */
/* Connection list */
#define AC_CLIST_LENGTH (0x7f<<0)
#define AC_CLIST_LONG (1<<7)

22
sound/pci/hda/patch_conexant.c
View File

@ -4079,7 +4079,8 @@ static int cx_auto_add_volume_idx(struct hda_codec *codec, const char *basename,
err = snd_hda_ctl_add(codec, nid, kctl);
if (err < 0)
return err;
if (!(query_amp_caps(codec, nid, hda_dir) & AC_AMPCAP_MUTE))
if (!(query_amp_caps(codec, nid, hda_dir) &
(AC_AMPCAP_MUTE | AC_AMPCAP_MIN_MUTE)))
break;
}
return 0;
@ -4379,6 +4380,22 @@ static const struct snd_pci_quirk cxt_fixups[] = {
{}
};
/* add "fake" mute amp-caps to DACs on cx5051 so that mixer mute switches
* can be created (bko#42825)
*/
static void add_cx5051_fake_mutes(struct hda_codec *codec)
{
static hda_nid_t out_nids[] = {
0x10, 0x11, 0
};
hda_nid_t *p;
for (p = out_nids; *p; p++)
snd_hda_override_amp_caps(codec, *p, HDA_OUTPUT,
AC_AMPCAP_MIN_MUTE |
query_amp_caps(codec, *p, HDA_OUTPUT));
}
static int patch_conexant_auto(struct hda_codec *codec)
{
struct conexant_spec *spec;
@ -4397,6 +4414,9 @@ static int patch_conexant_auto(struct hda_codec *codec)
case 0x14f15045:
spec->single_adc_amp = 1;
break;
case 0x14f15051:
add_cx5051_fake_mutes(codec);
break;
}
apply_pin_fixup(codec, cxt_fixups, cxt_pincfg_tbl);