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ALSA: hda - Disable AA-loopback on ALC283 Chromebook 

ALC283-based Chromebook suffers from occasional white noise, and it
turned out that this comes from AA-loopback.  Disable this output path
by just clearing mixer_nid, then the generic parser will skip the
creation of AA-loopback path.

Reported-and-tested-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2013-10-30 07:50:53 +01:00
parent 9cd5ab9c3c
commit d2e92709e8
1 changed files with 2 additions and 0 deletions
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2
sound/pci/hda/patch_realtek.c
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@ -3445,6 +3445,8 @@ static void alc283_fixup_chromebook(struct hda_codec *codec,
switch (action) {
case HDA_FIXUP_ACT_PRE_PROBE:
alc283_chromebook_caps(codec);
/* Disable AA-loopback as it causes white noise */
spec->gen.mixer_nid = 0;
spec->gen.hp_automute_hook = alc283_hp_automute_hook;
/* MIC2-VREF control */
/* Set to manual mode */