Bug 210921

Summary:	amdgpu on Radeon R9 280X floods "[drm] Display Core has been requested via kernel parameter but isn't supported by ASIC, ignoring"
Product:	Drivers	Reporter:	Alexandre Demers (alexandre.f.demers)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	NEW ---
Severity:	low	CC:	alexdeucher, issor.oruam
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	5.9.14	Subsystem:
Regression:	No	Bisected commit-id:

Description Alexandre Demers 2020-12-27 17:36:00 UTC

A small extract of what is spurted in logs when using an Radeon R9 280X with amdgpu.

[...]
[47837.292590] [drm] Display Core has been requested via kernel parameter but isn't supported by ASIC, ignoring
[47837.409321] [drm] Display Core has been requested via kernel parameter but isn't supported by ASIC, ignoring
[47837.553302] [drm] Display Core has been requested via kernel parameter but isn't supported by ASIC, ignoring
[47837.640563] [drm] Display Core has been requested via kernel parameter but isn't supported by ASIC, ignoring
[...]

My R9 280X was put aside in the last year for a Vega FE. However, I'm back at working on VCE 1 and this is one of the things I've found out since plugging the card in. I don't see why we should continually print (and at that pace...) that this is not supported. Report it once and move along.

I've narrowed down the issue to line 3037 in drivers/gpu/drm/amd/amdgpu/amdgpu_device.c. DRM_INFO should be replaced by DRM_INFO_ONCE.

By the way, the card is still rock solid for any regular work and many games in my library.