[Bug 94126] [SKL/KBL] Vblank counter issues when DMC takes goes to DC5/DC6 impacting frontbuffer tracking and PSR with X modesetting(0) driver.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94126

--- Comment #14 from Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com> ---
This was fixed with 

2e8bf22 drm/i915: Estimate and update missed vblanks.
d0bb96b drm/vblank: Restoring vblank counts after device PM events.
68036b0 drm/vblank: Do not update vblank count if interrupts are already
disabled.
f4c0468 drm/atomic: Handle 64-bit return from drm_crtc_vblank_count()
3abe241 drm/tegra: Handle 64-bit return from drm_crtc_vblank_count()
9038aa4 drm/radeon: Handle 64-bit return from drm_crtc_vblank_count()
23effc1 drm/amdgpu: Handle 64-bit return from drm_crtc_vblank_count()
1b29b7c drm/i915: Handle 64-bit return from drm_crtc_vblank_count()
734cbbf drm/i915/vblank: Make the vblank counter u64 -> u32 typecast explicit
3b765c0 drm/vblank: Data type fixes for 64-bit vblank sequences.

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