Re: [PATCH] ALSA: hda/realtek: Enable mute LED on HP Laptop 15-dy0xxx
Takashi Iwai <[email protected]>
| Newsgroups | gmane.linux.alsa.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 06 Aug 2026 01:57:27 +0200, Carl Quist wrote: > > > The mute LED on the HP Laptop 15-dy0xxx (PCI SSID 103c:864f, Realtek > ALC236) does not work, because the machine has no entry in the quirk > table. No fixup is applied, so no mute LED classdev is registered and > nothing ever drives the LED. > > The LED is controlled by COEF index 0x07, bit 0. This was verified on > the hardware with hda-verb: setting the bit lights the mute LED and > clearing it turns the LED off. > > Â hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x07 > Â hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x1 Â Â # LED on > Â hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x200 Â # LED off > > That is exactly what ALC236_FIXUP_HP_MUTE_LED_COEFBIT2 configures, and > the closely related HP Laptop 15-dw0xxx (103c:85f0) already uses it. > Bit 9 (0x200) is set by default on this board and is preserved by the > fixup's read-modify-write. > > Tested on an HP Laptop 15-dy0xxx (SKU 7FU54UA#ABA, board 864F, > BIOS F.40). > > Signed-off-by: Carl Quist <[email protected]> Applied now. But at the next time, please submit to [email protected], instead. It's the place for kernel patches. thanks, Takashi