[Bug 110659] pageflipping seems to cause jittering on mouse input when running Hitman 2 in Wine/DXVK with amdgpu.dc=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110659

--- Comment #48 from Nicholas Kazlauskas <nicholas.kazlauskas at amd.com> ---
(In reply to tempel.julian from comment #47)
> I got a new 1440p 144 Hz FreeSync display, and as expected, the issue is
> unchanged with it.
> 
> With it, I've created a new debug dmesg log for render stutter in Oblivion,
> this time with your patch applied to drm-next kernel.
> 
> Perhaps this could be interesting?
> 
> 
> [  529.556752] [drm:drm_mode_addfb2 [drm]] [FB:79]
> [  529.557106] [drm:amdgpu_dm_atomic_commit_tail [amdgpu]] VRR packet
> update: crtc=47 enabled=1 state=3
> [  529.557164] [drm:dc_commit_updates_for_stream [amdgpu]] debug: full
> update issued
> [  529.564401] [drm:drm_mode_addfb2 [drm]] [FB:86]
> [  531.420971] [drm:drm_mode_addfb2 [drm]] [FB:95]
> [  531.459067] [drm:drm_mode_addfb2 [drm]] [FB:96]
> [  544.144771] [drm:amdgpu_dm_atomic_commit_tail [amdgpu]] VRR packet
> update: crtc=47 enabled=0 state=2
> [  544.145961] [drm:dc_commit_updates_for_stream [amdgpu]] debug: full
> update issued
> [  544.169447] [drm:drm_mode_addfb2 [drm]] [FB:79]
> [  544.172953] [drm:drm_mode_addfb2 [drm]] [FB:94]

This is normal behavior for toggling into and out of VRR. I was expecting to
see was a log with hundreds of full updates issued, but since this isn't the
case I think it's something more fundamental with vblank timing though I'm
still not quite sure why it I can't reproduce it in my testing.

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