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ALSA: hda/realtek - Improve HP depop when system change power state on Chromebook 

It is better to change Mic2-Vref to manual mode.
Manual control Mic2-Vref will solve pop noise issue.
It will improve pop noise for power on, power off, S3 and resume.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Kailang Yang 2014-04-07 16:41:52 +08:00 committed by Takashi Iwai
parent 3af5d0524a
commit de9481cb40
1 changed files with 4 additions and 0 deletions
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4
sound/pci/hda/patch_realtek.c
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@ -4005,6 +4005,10 @@ static void alc283_fixup_chromebook(struct hda_codec *codec,
spec->gen.mixer_nid = 0;
break;
case HDA_FIXUP_ACT_INIT:
/* MIC2-VREF control */
/* Set to manual mode */
val = alc_read_coef_idx(codec, 0x06);
alc_write_coef_idx(codec, 0x06, val & ~0x000c);
/* Enable Line1 input control by verb */
val = alc_read_coef_idx(codec, 0x1a);
alc_write_coef_idx(codec, 0x1a, val | (1 << 4));