Commit 4b527b65 authored by David Henningsson's avatar David Henningsson Committed by Takashi Iwai
Browse files

ALSA: hda - limit internal mic boost for Asus X202E 

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: default avatarDavid Henningsson <david.henningsson@canonical.com>
Cc: <stable@vger.kernel.org> [v3.5+]
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d279fae8

sound/pci/hda/patch_via.c

+29 −0
Original line number Diff line number Diff line
@@ -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) {

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