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authorTakashi Iwai <tiwai@suse.de>2011-08-03 07:48:37 +0200
committerTakashi Iwai <tiwai@suse.de>2011-08-04 15:21:13 +0200
commitadabb3ec8b0bcbd2ca81973d33c3da726b939c7c (patch)
tree9f7780b73244c211d04670e95bdecf8bf810a4a7 /sound
parent9f3b24948f22e4e21e961bd514c2089d24f0938e (diff)
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_realtek.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index e125c60fe35..9a1aa09f47f 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),