5.11 frozen screen after suspend - renoir

Brief summary of the problem:

Laptop with renoir GPU fails to return to a functional state after upgrading to Linux 5.11.

Device is a Lenovo Ideapad 14are05 (Australian Model)

Hardware description:

• CPU: AMD Ryzen 7 4800U
• GPU: Integrated GPU on CPU - set to 2GB VRAM
• System Memory: 16GB DDR4 SODIMM
• Display(s): Inbuilt Laptop Display
• Type of Diplay Connection: eDP

System infomration:

• Distro name and Version: Arch Linux - Up to Date
• Kernel version: 5.11.arch2 and 5.11.zen2 (both exhibit same issue)
• Custom kernel: N/A
• AMD package version: No package

How to reproduce the issue:

• Any suspend action causes the display to fail to recover after coming back out of suspend.
• Reverting to 5.10 fixes the issue.
• There is visual corruption and unresponsiveness in wayland and swapping TTY does not help the issue.
• The display can be recovered by cat /sys/kernel/debug/dri/0/amdgpu_gpu_recover, swapping to another tty, killing sway, and then restarting.
• There are a series of Fence fallback timer expired on ring sdma0 errors, as well as other errors on boot. See the attached file for journalctl grepping for (drm|amdgpu).
• Plugging in another monitor to HDMI makes no difference.
• The issue happens every single time suspend occurs.

I've attached both a filtered log for just amdgpu/drm and a full log of a single boot.

Also exhibits the same warnings/errors as #1488 (closed)

Attached files:

• journalctl log - filtered amdgpu_errors
• journalctl log full_journalctl