At Tue, 18 Sep 2012 14:26:59 +0200, David Henningsson wrote:

When the input gain for the internal mic is set to its maximum level, the background noise becomes so high - and any relevant signal clipped - that the setting becomes unusable. It is better to limit the amplification.

BugLink: https://bugs.launchpad.net/bugs/1052460 Signed-off-by: David Henningsson david.henningsson@canonical.com

---

Feel free to add cc to stable if you think it makes sense to do so. Alsa info available at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1052460/+attachment/332...

Thanks, applied now with Cc to stable 3.5+.

Takashi

sound/pci/hda/patch_via.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c index d5f36a1..74fb6fd 100644 --- a/sound/pci/hda/patch_via.c +++ b/sound/pci/hda/patch_via.c @@ -3666,6 +3666,32 @@ static void set_widgets_power_state_vt2002P(struct hda_codec *codec) update_power_state(codec, 0x21, AC_PWRST_D3); }

+/*

• • pin fix-up
• */

+enum {

• VIA_FIXUP_INTMIC_BOOST,

+};

+static void via_fixup_intmic_boost(struct hda_codec *codec,

• 		  const struct hda_fixup *fix, int action)
  

+{

• if (action == HDA_FIXUP_ACT_PRE_PROBE)

• override_mic_boost(codec, 0x30, 0, 2, 40);
  

+}

+static const struct hda_fixup via_fixups[] = {

• [VIA_FIXUP_INTMIC_BOOST] = {

• .type = HDA_FIXUP_FUNC,
  

• .v.func = via_fixup_intmic_boost,
  

• },

+};

+static const struct snd_pci_quirk vt2002p_fixups[] = {

• SND_PCI_QUIRK(0x1043, 0x8532, "Asus X202E", VIA_FIXUP_INTMIC_BOOST),
• {}

+};

/* patch for vt2002P */ static int patch_vt2002P(struct hda_codec *codec) { @@ -3682,6 +3708,9 @@ static int patch_vt2002P(struct hda_codec *codec) override_mic_boost(codec, 0x29, 0, 3, 40); add_secret_dac_path(codec);

• snd_hda_pick_fixup(codec, NULL, vt2002p_fixups, via_fixups);
• snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_PRE_PROBE);
• /* automatic parse from the BIOS config */ err = via_parse_auto_config(codec); if (err < 0) {

-- 1.7.9.5