I didn't notice this until now, probably because everything still _works_, but I get a new big warning splat at bootup on my main workstation these days as of the merge window changes.
The full warning is attached, but it's basically the ASSERT(0) at line 938 in
drivers/gpu/drm/amd/display/dc/core/dc_link.c
and it looks to have been introduced by commit c282d9512cdd ("drm/amd/display: factor out dp detection link training and mst top detection").
This is the same old setup I've reported before, with some random Radeon card with two monitors attached (PCI ID 1002:67df rev e7, subsystem ID 1da2:e353).
I think the card went by the name "Sapphire Pulse RX 580 8GB" in case any of that matters, but it's been working fine.
It still works fine, it just has a big ugly boot-time splat.
As mentioned, two 4K monitors attached, both over HDMI.
If there is any particular info you want, just let me know where/how to find it, and I can provide.
Linus