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

[Stefan Binding <sbinding@opensource.cirrus.com>]

On 29/09/2026 10:45, Takashi Iwai wrote:
> 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.

Looks all OK to me.
I'm going to send up firmware to linux-firmware for this laptop shortly.

Thanks,

Stefan

>
> thanks,
>
> Takashi