Commits
Tomasz Figa committed 646ec687180
drm/rockchip: Do not enable vblank without event
Originally we needed to enable vblank for any atomic commit to kick the
PSR machine, but that was changed and we no longer need to do so from
a vblank interrupt. Let's return to original behavior of enabling
vblank only if it is really necessary.
This essentially reverts commit 5b6804034ae9 ("drm/rockchip: Enable
vblank without event").
Signed-off-by: Tomasz Figa <tfiga@chromium.org>