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>

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));