Re: [PATCH 0/4] Add support for the bass speakers of Lenovo Yoga Slim 7 Carbon 14ACN6

[Takashi Iwai]

On Sun, 20 Sep 2026 11:28:04 +0200,
Ilya Pavlukhin wrote:
> 
> The Lenovo Yoga Slim 7 Carbon 14ACN6 (82L0, Ryzen 5000) has four
> speakers. The two tweeters are driven directly by the ALC287, the two
> bass speakers by a pair of CS35L41 amplifiers on I2C. On Linux only
> the tweeters work [1].
> 
> The amplifiers are described by ACPI HID CLSA0102, without _DSD, in a
> single node with both I2C addresses, the same way as CLSA0100/CLSA0101
> on the Legion 7. Patches 1-3 add CLSA0102 next to them. The Windows
> Cirrus driver configures CLSA0102 with an external speaker supply, so
> external boost is used.
> 
> Patch 4 adds the codec quirk. The ALC287 only clocks the I2S bus to the
> amplifiers while pin 0x17 is enabled, and the BIOS marks that pin as
> unconnected.
> 
> Tested on a Yoga Slim 7 Carbon 14ACN6 (BIOS H5CN42WW) with all four
> speakers playing. The DSP firmware (cs35l41-dsp1-spk-prot-17aa3856*)
> is not in linux-firmware yet. For testing it was taken from the Lenovo
> Windows driver package (tuning "Lenovo-S760-17AA383D"). Without it the
> driver falls back to the default spk-prot firmware.
> 
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=215632
> 
> Ilya Pavlukhin (4):
>   ACPI: scan: Add CLSA0102 to the serial bus ignore list
>   platform/x86: serial-multi-instantiate: Add CLSA0102
>   ALSA: hda: cs35l41: Add support for CLSA0102
>   ALSA: hda/realtek: Add quirk for Lenovo Yoga Slim 7 Carbon 14ACN6

I can take the series, but before that, I'd like hear a confirmation
from Cirrus people.


thanks,

Takashi