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

[Ilya Pavlukhin]

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

 drivers/acpi/scan.c                           |  1 +
 .../platform/x86/serial-multi-instantiate.c   |  1 +
 sound/hda/codecs/realtek/alc269.c             | 28 +++++++++++++++++++
 .../hda/codecs/side-codecs/cs35l41_hda_i2c.c  |  3 ++
 .../codecs/side-codecs/cs35l41_hda_property.c | 28 +++++++++++++++++++
 5 files changed, 61 insertions(+)


base-commit: 4d4bc656580bcc448f8e6d6b3b3a903120eb29bb
-- 
2.43.0