Quoting Chris Wilson (2017-08-17 13:37:06)
> If we miss the current vblank because the gpu was busy, that may cause a
> jitter as the frame rate temporarily drops. We try to limit the impact
> of this by then boosting the GPU clock to deliver the frame as quickly
> as possible. Originally done in commit 6ad790c0f5ac ("drm/i915: Boost GPU
> frequency if we detect outstanding pageflips") but was never forward
> ported to atomic and finally dropped in commit fd3a40242e87 ("drm/i915:
> Rip out legacy page_flip completion/irq handling").
> References: https://bugs.freedesktop.org/show_bug.cgi?id=102199
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102199
> Signed-off-by: Chris Wilson <[email protected]>
> Cc: Maarten Lankhorst <[email protected]>
> Cc: Ville Syrjälä <[email protected]>
> Cc: Daniel Vetter <[email protected]>
Tested-by: Lyude Paul <[email protected]>
-Chris
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