Comment 1 for bug 1529624

Inform userspace that one channel of the internal mic has reversed
polarity, so it does not attempt to add both channels together and
end up with silence.

Cc: <email address hidden>
Reported-by: Andrzej Mendel <email address hidden>
Alsa-info: http://www.alsa-project.org/db/?f=3088f82a0cf977855f92af9db8ad406c04f71efa
BugLink: https://bugs.launchpad.net/bugs/1529624
Signed-off-by: David Henningsson <email address hidden>
---
 sound/pci/hda/patch_realtek.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 3a89d82..2fdda51 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4666,6 +4666,7 @@ enum {
  ALC290_FIXUP_SUBWOOFER,
  ALC290_FIXUP_SUBWOOFER_HSJACK,
  ALC269_FIXUP_THINKPAD_ACPI,
+ ALC269_FIXUP_DMIC_THINKPAD_ACPI,
  ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
  ALC255_FIXUP_DELL2_MIC_NO_PRESENCE,
  ALC255_FIXUP_HEADSET_MODE,
@@ -5103,6 +5104,12 @@ static const struct hda_fixup alc269_fixups[] = {
   .type = HDA_FIXUP_FUNC,
   .v.func = hda_fixup_thinkpad_acpi,
  },
+ [ALC269_FIXUP_DMIC_THINKPAD_ACPI] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc_fixup_inv_dmic,
+ .chained = true,
+ .chain_id = ALC269_FIXUP_THINKPAD_ACPI,
+ },
  [ALC255_FIXUP_DELL1_MIC_NO_PRESENCE] = {
   .type = HDA_FIXUP_PINS,
   .v.pins = (const struct hda_pintbl[]) {
@@ -5457,6 +5464,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
  SND_PCI_QUIRK(0x17aa, 0x2226, "ThinkPad X250", ALC292_FIXUP_TPT440_DOCK),
  SND_PCI_QUIRK(0x17aa, 0x2233, "Thinkpad", ALC293_FIXUP_LENOVO_SPK_NOISE),
  SND_PCI_QUIRK(0x17aa, 0x30bb, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY),
+ SND_PCI_QUIRK(0x17aa, 0x3902, "Lenovo E50-80", ALC269_FIXUP_DMIC_THINKPAD_ACPI),
  SND_PCI_QUIRK(0x17aa, 0x3977, "IdeaPad S210", ALC283_FIXUP_INT_MIC),
  SND_PCI_QUIRK(0x17aa, 0x3978, "IdeaPad Y410P", ALC269_FIXUP_NO_SHUTUP),
  SND_PCI_QUIRK(0x17aa, 0x5013, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
--
1.9.1