6.11 kernel regression: AMD 7950x iGPU fails to initialize (with bisect)

Brief summary of the problem:

I've found a regression in the 6.11 kernel, caused by the commit 3af2c80ae2 ("drm/amdgpu: refine gfx10 firmware loading").

Hardware description:

• CPU/GPU: AMD 7950x

System information:

• Distro name and Version: Ubuntu 22.04
• Kernel version: 6.11, manually built

How to reproduce the issue:

On boot, the GPU will fail to initialize.

Attached files:

Log files (for system lockups / game freezes / crashes)

Dmesg related snippet:

[drm:amdgpu_device_init [amdgpu]] *ERROR* early_init of IP block <gfx_v10_0> failed -22
amdgpu: Fatal error during GPU init
amdgpu: amdgpu: finishing device.