Setting AMD_DEBUG=nodma did not work for me. I have an AMD Radeon RX 5700 XT.
Experiencing many crashes after a few minutes playing DOOM (OpenGL).

My packages are the following:

> pacman -Q linux linux-firmware-agd5f-radeon-navi10 {,lib32-}{mesa-git,vulkan-radeon-git,libdrm}
linux 5.3.arch1-1
linux-firmware-agd5f-radeon-navi10 2019.09.13.18.36-1
mesa-git 1:19.3.0_devel.115574.40087ffc5b9-1
vulkan-radeon-git 1:19.3.0_devel.115574.40087ffc5b9-1
libdrm 2.4.99-1
lib32-mesa-git 1:19.3.0_devel.115574.40087ffc5b9-1
lib32-vulkan-radeon-git 1:19.3.0_devel.115574.40087ffc5b9-1
lib32-libdrm 2.4.99-1

I have an apitrace file but it's 3GB, not sure where I can upload it for
someone to investigate (if that can help let me know I'll figure something).

Error log is the same as Marko Popovic from the first comment:
[drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed
out or interrupted!
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx_0.0.0 timeout, signaled
seq=48914, emitted seq=48916
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process
DOOMx64.exe pid 3123 thread DOOMx64.ex:cs0 pid 3172