ALSA: hda/realtek - Improve HP depop when system change power state o…

…n 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 <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
cbmeeks · Apr 7, 2014 · de9481c · de9481c
1 parent 3af5d05
commit de9481c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git 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));