github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-07 06:17:02 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

ALSA: hda/realtek: Fix speakers on ASUS PM3406CHA

Browse Source 
The ASUS ExpertBook PM3406CHA uses an ALC256 codec with subsystem
ID 1043:1664. On Linux boot, the internal speakers are silent even
though playback is routed to the codec and the speaker pin is
configured for output.

The codec starts with coefficient 0x10 set to 0x1d20. Writing 0x7f20
to coefficient 0x10 immediately restores internal speaker output.

This was reproduced on the affected hardware from a fresh boot using
hda-verb. Reducing a larger initialization sequence showed that this
coefficient write alone is sufficient; no GPIO, EAPD, pin-control, or
other coefficient changes are required. After applying the coefficient
in userspace, speaker output also remains functional across suspend
and resume.

Add a machine-specific HDA fixup that writes the required coefficient.

The fixup has been compile-tested, but could not be boot-tested because
the affected hardware is no longer available.

Closes: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/2162718
Signed-off-by: Muhtasham Nawr al-Mahmud <muhtaseem2005@gmail.com>
Link: https://patch.msgid.link/20260924144512.3989-1-muhtaseem2005@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Muhtasham Nawr al-Mahmud 2026-09-24 20:45:12 +06:00 committed by Takashi Iwai
parent 763183f76d
commit 0eee030c2c
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sound/hda/codecs/realtek/alc269.c
View File

@ -4025,6 +4025,7 @@ enum {
ALC269_FIXUP_SONY_VAIO,
ALC275_FIXUP_SONY_VAIO_GPIO2,
ALC269_FIXUP_DELL_M101Z,
ALC256_FIXUP_ASUS_PM3406CHA,
ALC269_FIXUP_SKU_IGNORE,
ALC269_FIXUP_ASUS_G73JW,
ALC269_FIXUP_ASUS_N7601ZM_PINS,
@ -4484,6 +4485,14 @@ static const struct hda_fixup alc269_fixups[] = {
{}
}
},
[ALC256_FIXUP_ASUS_PM3406CHA] = {
.type = HDA_FIXUP_VERBS,
.v.verbs = (const struct hda_verb[]) {
{ 0x20, AC_VERB_SET_COEF_INDEX, 0x10 },
{ 0x20, AC_VERB_SET_PROC_COEF, 0x7f20 },
{}
}
},
[ALC269_FIXUP_SKU_IGNORE] = {
.type = HDA_FIXUP_FUNC,
.v.func = alc_fixup_sku_ignore,
@ -7853,6 +7862,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
SND_PCI_QUIRK(0x1043, 0x1652, "ASUS ROG Zephyrus Do 15 SE", ALC289_FIXUP_ASUS_ZEPHYRUS_DUAL_SPK),
SND_PCI_QUIRK(0x1043, 0x1662, "ASUS GV301QH", ALC294_FIXUP_ASUS_DUAL_SPK),
SND_PCI_QUIRK(0x1043, 0x1663, "ASUS GU603ZI/ZJ/ZQ/ZU/ZV", ALC285_FIXUP_ASUS_HEADSET_MIC),
SND_PCI_QUIRK(0x1043, 0x1664, "ASUS ExpertBook PM3406CHA", ALC256_FIXUP_ASUS_PM3406CHA),
SND_PCI_QUIRK(0x1043, 0x1683, "ASUS UM3402YAR", ALC287_FIXUP_CS35L41_I2C_2),
SND_PCI_QUIRK(0x1043, 0x16a3, "ASUS UX3402VA", ALC245_FIXUP_CS35L41_SPI_2),
SND_PCI_QUIRK(0x1043, 0x16b2, "ASUS GU603", ALC289_FIXUP_ASUS_GA401),