Dear Maintainer,

Laptops with Rembrandt GPUs and certain panels are experiencing total and
unrecoverable system hangs with the following error:

amdgpu 0000:04:00.0: [drm] *ERROR* [CRTC:67:crtc-0] flip_done timed out

After this error occurs the panel is completely frozen and a hard reboot is
required in order to recover.

This has been diagnosed as a problem with PRS-SU on some Parade TCONs running
on older firmware. There is a gitlab ticket which references patches confirmed
to fix the problem: https://gitlab.freedesktop.org/drm/amd/-/issues/2443

Please incorporate these patches into the next Debian stable release if
possible. Thank you.