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ALSA: hda/realtek: reset eapd coeff to default value for alc287 

commit 8822702f6e4c8917c83ba79e0ebf2c8c218910d4 upstream.

Ubuntu users reported an audio bug on the Lenovo Yoga Slim 7 14IIL05,
he installed dual OS (Windows + Linux), if he booted to the Linux
from Windows, the Speaker can't work well, it has crackling noise,
if he poweroff the machine first after Windows, the Speaker worked
well.

Before rebooting or shutdown from Windows, the Windows changes the
codec eapd coeff value, but the BIOS doesn't re-initialize its value,
when booting into the Linux from Windows, the eapd coeff value is not
correct. To fix it, set the codec default value to that coeff register
in the alsa driver.

BugLink: http://bugs.launchpad.net/bugs/1925057
Suggested-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210507024452.8300-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hui Wang 2021-05-07 10:44:52 +08:00 committed by Greg Kroah-Hartman
parent b2297d1b95
commit be1f7f30b6
1 changed files with 4 additions and 1 deletions
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5
sound/pci/hda/patch_realtek.c
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@ -385,7 +385,6 @@ static void alc_fill_eapd_coef(struct hda_codec *codec)
case 0x10ec0282:
case 0x10ec0283:
case 0x10ec0286:
case 0x10ec0287:
case 0x10ec0288:
case 0x10ec0285:
case 0x10ec0298:
@ -396,6 +395,10 @@ static void alc_fill_eapd_coef(struct hda_codec *codec)
case 0x10ec0275:
alc_update_coef_idx(codec, 0xe, 0, 1<<0);
break;
case 0x10ec0287:
alc_update_coef_idx(codec, 0x10, 1<<9, 0);
alc_write_coef_idx(codec, 0x8, 0x4ab7);
break;
case 0x10ec0293:
alc_update_coef_idx(codec, 0xa, 1<<13, 0);
break;