amdgpu: several powerplay errors during boot of HAWAII PRO GPU

[Kai Wasserbäch]

[Please CC me on replies, I'm not subscribed to amd-gfx.]

Hey,
with the recent 4.19.x series of kernels I'm seeing several errors being logged
during boot for my R9 290 (HAWAII PRO) GPU:
> [   50.057264] amdgpu: [powerplay] Failed to retrieve minimum clocks.
> [   50.057266] amdgpu: [powerplay] Error in phm_get_clock_info 
> [   50.057309] [drm] dce110_link_encoder_construct: Failed to get encoder_cap_info from VBIOS with error code 4!
> [   50.057316] [drm] dce110_link_encoder_construct: Failed to get encoder_cap_info from VBIOS with error code 4!
> [   50.057324] [drm] dce110_link_encoder_construct: Failed to get encoder_cap_info from VBIOS with error code 4!
> [   51.611918] amdgpu: [powerplay] 
>                 failed to send message 282 ret is 254

Since the system is coming up and accelerations seems to be working, this can't
be critical. Or is there something I need to set on the kernel command line (so
far I have: modprobe.blacklist=radeon radeon.cik_support=0 amdgpu.cik_support=1
amdgpu.dc=1)? Anyway, I thought I let you know. If you need more information,
feel free to ask.

Cheers,
Kai