Public bug reported:

Internal microphone not working on Lenovo IdeaPad 3 15ALC6 (Type 82KU).
The AMD ACP coprocessor is present but internal mic capture device never 
appears.

System info:
- Product: Lenovo IdeaPad 3 15ALC6 (82KU)
- Subsystem Id: 0x17aa38bc
- Audio codec: Realtek ALC257
- Kernel: 6.17.0-35-generic
- Distro: Linux Mint 22.3

lspci output:
03:00.1 Audio device: AMD/ATI Renoir Radeon High Definition Audio Controller
03:00.5 Multimedia controller: AMD ACP/ACP3X/ACP6x Audio Coprocessor (rev 01)
03:00.6 Audio device: AMD Family 17h/19h HD Audio Controller

arecord -l shows only ALC257, no DMIC device.
Modules snd_rn_pci_acp3x and snd_sof_amd_acp load successfully but no capture 
device appears.

Fix needed: add DMI quirk entry for product name "82KU" in
sound/soc/amd/yc/acp6x-mach.c similar to other IdeaPad models (82SJ, 82TL, 82QF 
etc).

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: acp audio ideapad lenovo microphone

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https://bugs.launchpad.net/bugs/2157675

Title:
  Internal microphone not working on Lenovo IdeaPad 3 15ALC6 (82KU) -
  missing ACP quirk

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