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| author | Takashi Iwai <tiwai@suse.de> | 2011-08-03 05:48:37 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-08-04 13:21:13 (GMT) |
| commit | adabb3ec8b0bcbd2ca81973d33c3da726b939c7c (patch) | |
| tree | 9f7780b73244c211d04670e95bdecf8bf810a4a7 | |
| parent | 9f3b24948f22e4e21e961bd514c2089d24f0938e (diff) | |
| download | linux-adabb3ec8b0bcbd2ca81973d33c3da726b939c7c.tar.xz | |
ALSA: hda - Fix digital-mic mono recording on ASUS Eee PC
The digital-mic unit on ASUS Eee PC gives PDM signals instead of the
normal stereo PCM, thus you can't record a mono stream from the stereo
stream as is; the summed stereo signal results in almost zero level, and
you'll hear only soft noise.
As a workaround, use ALC269-specific COEF to manipulate the dmic route
for mono, like used for ALC271x. This is implemented as a fix-up, thus
it works only with model=auto or without REALTEK_QUIRKS Kconfig.
Reported-and-tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/patch_realtek.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index e125c60..9a1aa09 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -4484,6 +4484,22 @@ static void alc269_fixup_pcm_44k(struct hda_codec *codec, spec->stream_analog_capture = &alc269_44k_pcm_analog_capture; } +static void alc269_fixup_stereo_dmic(struct hda_codec *codec, + const struct alc_fixup *fix, int action) +{ + int coef; + + if (action != ALC_FIXUP_ACT_INIT) + return; + /* The digital-mic unit sends PDM (differential signal) instead of + * the standard PCM, thus you can't record a valid mono stream as is. + * Below is a workaround specific to ALC269 to control the dmic + * signal source as mono. + */ + coef = alc_read_coef_idx(codec, 0x07); + alc_write_coef_idx(codec, 0x07, coef | 0x80); +} + enum { ALC269_FIXUP_SONY_VAIO, ALC275_FIXUP_SONY_VAIO_GPIO2, @@ -4494,6 +4510,7 @@ enum { ALC275_FIXUP_SONY_HWEQ, ALC271_FIXUP_DMIC, ALC269_FIXUP_PCM_44K, + ALC269_FIXUP_STEREO_DMIC, }; static const struct alc_fixup alc269_fixups[] = { @@ -4556,10 +4573,19 @@ static const struct alc_fixup alc269_fixups[] = { .type = ALC_FIXUP_FUNC, .v.func = alc269_fixup_pcm_44k, }, + [ALC269_FIXUP_STEREO_DMIC] = { + .type = ALC_FIXUP_FUNC, + .v.func = alc269_fixup_stereo_dmic, + }, }; static const struct snd_pci_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK(0x1043, 0x1a13, "Asus G73Jw", ALC269_FIXUP_ASUS_G73JW), + SND_PCI_QUIRK(0x1043, 0x16e3, "ASUS UX50", ALC269_FIXUP_STEREO_DMIC), + SND_PCI_QUIRK(0x1043, 0x831a, "ASUS P901", ALC269_FIXUP_STEREO_DMIC), + SND_PCI_QUIRK(0x1043, 0x834a, "ASUS S101", ALC269_FIXUP_STEREO_DMIC), + SND_PCI_QUIRK(0x1043, 0x8398, "ASUS P1005", ALC269_FIXUP_STEREO_DMIC), + SND_PCI_QUIRK(0x1043, 0x83ce, "ASUS P1005", ALC269_FIXUP_STEREO_DMIC), SND_PCI_QUIRK(0x104d, 0x9073, "Sony VAIO", ALC275_FIXUP_SONY_VAIO_GPIO2), SND_PCI_QUIRK(0x104d, 0x907b, "Sony VAIO", ALC275_FIXUP_SONY_HWEQ), SND_PCI_QUIRK(0x104d, 0x9084, "Sony VAIO", ALC275_FIXUP_SONY_HWEQ), |