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There's 2 reasons for doing a vblank wait: - To fulfill uabi expectations, but the legacy ioctls are ill-defined enough that we really only need this when we do send out an event. - To make sure we don't tear down mappings before the scanout engine stops accessing it. The later is problematic with the current code since e.g. rotation might need a different mapping than normal orientation. And rotation is a plane property, and not on the fb. Hence we need to remove this optimization. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> [danvet: Completely new commit message.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1481204729-9058-5-git-send-email-maarten.lankhorst@linux.intel.com |
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