Comment 1 for bug 1089795

These are being reported as being so noisy at high mic boost levels,
so they are unusable in practice.
Therefore artificially limit the boosts.

BugLink: https://bugs.launchpad.net/bugs/1089795
Signed-off-by: David Henningsson <email address hidden>
---
 sound/pci/hda/patch_realtek.c | 42 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 28b3f5a..6e5d383 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3156,6 +3156,38 @@ static void alc271_hp_gate_mic_jack(struct hda_codec *codec,
  }
 }

+static void alc269_fixup_limit_int_mic_boost(struct hda_codec *codec,
+ const struct hda_fixup *fix,
+ int action)
+{
+ struct alc_spec *spec = codec->spec;
+ struct auto_pin_cfg *cfg = &spec->gen.autocfg;
+ int i;
+
+ /* The mic boosts on level 2 and 3 are too noisy
+ on the internal mic input.
+ Therefore limit the boost to 0 or 1. */
+
+ if (action != HDA_FIXUP_ACT_PROBE)
+ return;
+
+ for (i = 0; i < cfg->num_inputs; i++) {
+ hda_nid_t nid = cfg->inputs[i].pin;
+ unsigned int defcfg;
+ if (cfg->inputs[i].type != AUTO_PIN_MIC)
+ continue;
+ defcfg = snd_hda_codec_get_pincfg(codec, nid);
+ if (snd_hda_get_input_pin_attr(defcfg) != INPUT_PIN_ATTR_INT)
+ continue;
+
+ snd_hda_override_amp_caps(codec, nid, HDA_INPUT,
+ (0x00 << AC_AMPCAP_OFFSET_SHIFT) |
+ (0x01 << AC_AMPCAP_NUM_STEPS_SHIFT) |
+ (0x2f << AC_AMPCAP_STEP_SIZE_SHIFT) |
+ (0 << AC_AMPCAP_MUTE_SHIFT));
+ }
+}
+
 enum {
  ALC269_FIXUP_SONY_VAIO,
  ALC275_FIXUP_SONY_VAIO_GPIO2,
@@ -3190,6 +3222,7 @@ enum {
  ALC271_FIXUP_AMIC_MIC2,
  ALC271_FIXUP_HP_GATE_MIC_JACK,
  ALC269_FIXUP_ACER_AC700,
+ ALC269_FIXUP_LIMIT_INT_MIC_BOOST,
 };

 static const struct hda_fixup alc269_fixups[] = {
@@ -3428,6 +3461,10 @@ static const struct hda_fixup alc269_fixups[] = {
   .chained = true,
   .chain_id = ALC271_FIXUP_DMIC,
  },
+ [ALC269_FIXUP_LIMIT_INT_MIC_BOOST] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc269_fixup_limit_int_mic_boost,
+ },
 };

 static const struct snd_pci_quirk alc269_fixup_tbl[] = {
@@ -3458,11 +3495,14 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
  SND_PCI_QUIRK(0x103c, 0x1973, "HP Pavilion", ALC269_FIXUP_HP_MUTE_LED_MIC1),
  SND_PCI_QUIRK(0x103c, 0x1983, "HP Pavilion", ALC269_FIXUP_HP_MUTE_LED_MIC1),
  SND_PCI_QUIRK_VENDOR(0x103c, "HP", ALC269_FIXUP_HP_MUTE_LED),
+ SND_PCI_QUIRK(0x1043, 0x106d, "Asus K53BE", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
+ SND_PCI_QUIRK(0x1043, 0x115d, "Asus 1015E", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
  SND_PCI_QUIRK(0x1043, 0x1427, "Asus Zenbook UX31E", ALC269VB_FIXUP_DMIC),
  SND_PCI_QUIRK(0x1043, 0x1517, "Asus Zenbook UX31A", ALC269VB_FIXUP_DMIC),
+ SND_PCI_QUIRK(0x1043, 0x16e3, "ASUS UX50", ALC269_FIXUP_STEREO_DMIC),
  SND_PCI_QUIRK(0x1043, 0x1a13, "Asus G73Jw", ALC269_FIXUP_ASUS_G73JW),
  SND_PCI_QUIRK(0x1043, 0x1b13, "Asus U41SV", ALC269_FIXUP_INV_DMIC),
- SND_PCI_QUIRK(0x1043, 0x16e3, "ASUS UX50", ALC269_FIXUP_STEREO_DMIC),
+ SND_PCI_QUIRK(0x1043, 0x1c23, "Asus X55U", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
  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),
--
1.7.9.5