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

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>
This commit is contained in:
Hui Wang 2021-05-07 10:44:52 +08:00 committed by Takashi Iwai
parent f48652bbe3
commit 8822702f6e
1 changed files with 4 additions and 1 deletions
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5
sound/pci/hda/patch_realtek.c
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@ -395,7 +395,6 @@ static void alc_fill_eapd_coef(struct hda_codec *codec)
case 0x10ec0282:
case 0x10ec0283:
case 0x10ec0286:
case 0x10ec0287:
case 0x10ec0288:
case 0x10ec0285:
case 0x10ec0298:
@ -406,6 +405,10 @@ 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;