[ 070/122] ALSA: hda - limit internal mic boost for Asus X202E

Greg Kroah-Hartman
2012-10-10T23:06:22Z

From: David Henningsson <david.henningsson@canonical.com>

commit 4b527b6516ab1f0af8aaedd02dbf71ee2c1180f4 upstream.

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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -3670,6 +3670,32 @@ static void set_widgets_power_state_vt20
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)
{
@@ -3686,6 +3712,9 @@ static int patch_vt2002P(struct hda_code
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) {