Comment # 1 on bug 109649 from Jan Vesely

Bisection shows that the first bad commit is:
commit 09b6f25b55d9c66af7302e1f09ad90aa5b1dfbcb (HEAD, refs/bisect/bad)
Author: Christian König <christian.koenig@amd.com>
Date:   Wed Aug 15 14:04:47 2018 +0200

    drm/amdgpu: fix VM size reporting on Raven

    Raven doesn't have an VCE block and so also no buggy VCE firmware.

    Signed-off-by: Christian König <christian.koenig@amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Reviewed-by: Huang Rui <ray.huang@amd.com>
    Acked-by: Chunming Zhou <david1.zhou@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

I guess there is other buggy firmware/limitation?

# cat /sys/kernel/debug/dri/0/amdgpu_firmware_info 
VCE feature version: 0, firmware version: 0x00000000
UVD feature version: 0, firmware version: 0x00000000
MC feature version: 0, firmware version: 0x00000000
ME feature version: 40, firmware version: 0x00000099
PFP feature version: 40, firmware version: 0x000000ae
CE feature version: 40, firmware version: 0x0000004d
RLC feature version: 1, firmware version: 0x0000d237
RLC SRLC feature version: 1, firmware version: 0x00000001
RLC SRLG feature version: 1, firmware version: 0x00000001
RLC SRLS feature version: 1, firmware version: 0x00000001
MEC feature version: 40, firmware version: 0x0000018b
MEC2 feature version: 40, firmware version: 0x0000018b
SOS feature version: 0, firmware version: 0x00000000
ASD feature version: 0, firmware version: 0x0017ba78
SMC feature version: 0, firmware version: 0x00001e49
SDMA0 feature version: 41, firmware version: 0x000000a9
VCN feature version: 0, firmware version: 0x01004912
VBIOS version: 113-RAVEN-106