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

[Hui Wang]

Acked-by: Hui Wang <hui.wang at canonical.com>

On 6/23/26 16:44, Bin Li via kernel-team wrote:
> 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(-)
>