Re: [PATCH] ALSA: hda/realtek: Enable mute LED on HP Laptop 15-dy0xxx

[Takashi Iwai <tiwai@suse.de>]

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.
> 
>   hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x07
>   hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x1     # LED on
>   hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x200   # 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 <equalizerjr@gmail.com>

Applied now.  But at the next time, please submit to
linux-sound@vger.kernel.org, instead.  It's the place for kernel
patches.


thanks,

Takashi