[SRU][S][PATCH 0/1] Enable Realtek ALC287 + Cirrus CS35L56 Audio for Lenovo Yoga Pro 7

[Bin Li]

BugLink: https://bugs.launchpad.net/bugs/2156867

[ Impact ]
Users running Ubuntu on newer Lenovo Yoga Pro 7 laptops experience critical audio subsystem degradation.

The three primary failure points are:

* Critically Low Speaker Volume: Sound output through the built-in speaker array is barely audible, even when userspace volume sliders are set to 100%. While the host Realtek ALC287 codec initializes, its companion Cirrus Logic CS35L56 smart amplifiers default to an uncalibrated, low-power fallback state ("FIRMWARE_MISSING") because the system lacks their manufacturer-supplied hardware-tuning profiles.

* Non-Functional Speaker-Mute Keyboard LED: Pressing the F1 Audio Mute key on the keyboard toggles the stream status within PulseAudio/PipeWire correctly, but the physical amber LED hardware indicator on the keycap fails to illuminate. The software mute state is disconnected from the motherboard's GPIO controller.

* Missing/Dead Microphone Array: The system completely fails to register or capture audio via the internal digital microphone array. The default driver stack attempts to locate the DMIC components on a digital sub-link connected directly to the main processor's AMD ACP block, whereas Lenovo routed the microphone hardware channels through the primary Realtek codec pins.

[ Fix ]
* Kernel Driver Fixes
 - fc12cf16df9a ("ASoC: amd: acp: Add DMI quirk for Lenovo Yoga Pro 7 15ASH11")
 - d0426510a9e1 ("ASoC: amd: acp: add DMI override for ACP70 flag")
 - 17065203e1bc ("ALSA: hda/realtek:ALC269 fixup for Yoga Pro 7 15ASH11 mic mute LED")
 - 83dca2530fb3 ("ALSA: hda/realtek: ALC269 fixup for Lenovo Yoga Pro 7 15ASH111 audio")

* Firmware Environment Fixes

 - d33a9c6d7661 ("cirrus: cs35l56: Update firmware for Cirrus Amps for a couple of Lenovo laptops")
 - 604cb45fbe6d ("cirrus: cs35l56: Add firmware for Cirrus Amps for some Lenovo laptops")
 - cc2cb17f5ed9 ("cirrus: cs35l56: Add firmware for Cirrus Amps for some ASUS laptops")
 - 1d57ec2fdc3f ("cirrus: cs35l56: Add firmware for Cirrus Amps for some Lenovo laptops")
 - 0c9b82b60972 ("cirrus: Add cs35l56 firmware symlinks for Asus UM5606KA")

[ Test Plan ]
Install the patched kernel package and updated linux-firmware payload on an affected Lenovo Yoga Pro 7, then reboot to check:

1. Verify Amp Calibration & Speaker Volume:
  Play an audio stream at a standard volume level (30–50%). Confirm it produces crisp, loudly scaled audio.

2. Verify Microphone Capture:
   Open Ubuntu Settings -> Sound -> Input. Confirm that the ghost "Digital Microphone" tied to the AMD ACP is gone, and a functioning Internal Stereo Microphone device is present.
 Speak or tap on the chassis to confirm that the input visualizer bar responds dynamically to incoming audio data.

3 Verify Mute LED and Mic LED Illumination:
   Press the physical F1/F4 Mute hotkey. The amber LED light on the keycap must illuminate immediately when muted, and cleanly shut off as soon as the system is unmuted.

[ Where problems could occur ]
Scope of Regression: Extremely isolated. All changes are heavily guarded behind rigid DMI string check loops inside vendor-specific sub-drivers (AMD ACP matching tables, Realtek HDA quirk lists, and specific sub-hardware ID firmware loading paths). Systems built by other vendors (such as Dell, HP, or ASUS) or other laptop lines will bypass these conditional rules entirely.

Jackie Dong (1):
  ALSA: hda/realtek:ALC269 fixup for Yoga Pro 7 15ASH11 mic mute LED

 sound/hda/codecs/realtek/alc269.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

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2.54.0