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ALSA: hda - limit internal mic boost for Asus X202E

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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>
Cc: <stable@vger.kernel.org> [v3.5+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
David Henningsson 2012-09-18 14:26:59 +02:00 • committed by Takashi Iwai
parent d279fae8a4
commit 4b527b6516
1 changed files with 29 additions and 0 deletions
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29
sound/pci/hda/patch_via.c
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@ -3666,6 +3666,32 @@ static void set_widgets_power_state_vt2002P(struct hda_codec *codec)
update_power_state(codec, 0x21, AC_PWRST_D3); 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 */ /* patch for vt2002P */
static int patch_vt2002P(struct hda_codec *codec) 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); override_mic_boost(codec, 0x29, 0, 3, 40);
add_secret_dac_path(codec); 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 */ /* automatic parse from the BIOS config */
err = via_parse_auto_config(codec); err = via_parse_auto_config(codec);
if (err < 0) { if (err < 0) {