Hi kernel maintainers,

I noticed 6.7.4 has introduced a regression for the steam deck. The LCD steam deck can no longer probe the acp5x audio chipset anymore. This regression does not affect the 6.8.x series. I did not test kernel 6.7.3 because Opensuse tumbleweed skipped the update on my machine.

Steps to reproduce the problem

1. Obtain a steam deck

2. Install kernel 6.7.4

3. Boot the device and you will see dummy output in gnome shell

Observed kernel logs.

[    8.755614] cs35l41 spi-VLV1776:00: supply VA not found, using dummy regulator
[    8.760506] cs35l41 spi-VLV1776:00: supply VP not found, using dummy regulator
[    8.777148] cs35l41 spi-VLV1776:00: Cirrus Logic CS35L41 (35a40), Revision: B2
[    8.777471] cs35l41 spi-VLV1776:01: supply VA not found, using dummy regulator
[    8.777532] cs35l41 spi-VLV1776:01: supply VP not found, using dummy regulator
[    8.777709] cs35l41 spi-VLV1776:01: Reset line busy, assuming shared reset
[    8.788465] cs35l41 spi-VLV1776:01: Cirrus Logic CS35L41 (35a40), Revision: B2
[    8.877280] snd_hda_intel 0000:04:00.1: enabling device (0000 -> 0002)
[    8.877595] snd_hda_intel 0000:04:00.1: Handle vga_switcheroo audio client
[    8.889913] snd_acp_pci 0000:04:00.5: enabling device (0000 -> 0002)
[    8.890063] snd_acp_pci 0000:04:00.5: Unsupported device revision:0x50
[    8.890129] snd_acp_pci: probe of 0000:04:00.5 failed with error -22
[    8.906136] snd_hda_intel 0000:04:00.1: bound 0000:04:00.0 (ops amdgpu_dm_audio_component_bind_ops [amdgpu]

No kernel module in use shown.

04:00.5 Multimedia controller [0480]: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor [1022:15e2] (rev 50)
Subsystem: Valve Software Device [1e44:1776]
Flags: fast devsel, IRQ 70, IOMMU group 4
Memory at 80380000 (32-bit, non-prefetchable) [size=256K]
Capabilities: <access denied>
Kernel modules: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x, snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, snd_pci_ps, snd_sof_amd_renoir, snd_sof_amd_rembrandt, snd_sof_amd_vangogh, snd_sof_amd_acp63

Information for package kernel-default:
---------------------------------------
Repository     : openSUSE-Tumbleweed-Oss
Name           : kernel-default
Version        : 6.7.4-1.1
Arch           : x86_64
Vendor         : openSUSE
Installed Size : 240.3 MiB
Installed      : Yes
Status         : up-to-date
Source package : kernel-default-6.7.4-1.1.nosrc
Upstream URL   : https://www.kernel.org/
Summary        : The Standard Kernel
Description    : 
    The standard kernel for both uniprocessor and multiprocessor systems.


    Source Timestamp: 2024-02-06 05:32:37 +0000
    GIT Revision: 01735a3e65287585dd830a6a3d33d909a4f9ae7f
    GIT Branch: stable

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
	Vendor: Valve
	Version: F7A0120
	Release Date: 12/01/2023
	Address: 0xE0000
	Runtime Size: 128 kB
	BIOS Revision: 1.20
	Firmware Revision: 1.16

#regzbot introduced: v6.7.2..v6.7.4