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authorKailang Yang <kailang@realtek.com>2014-04-07 16:41:52 +0800
committerTakashi Iwai <tiwai@suse.de>2014-04-07 12:32:52 +0200
commitde9481cb40339d9bfc1104b53649876fc5f3d432 (patch)
tree5412307cffd07efda30cbdde7481adc7ca6b3fe7 /sound
parent3af5d0524aac70a6df638d6558f4b60dbf0216e7 (diff)
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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>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_realtek.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 053107786f33..ca1298afacd9 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -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));