drm/i915: Limit calling mark-busy only for potential scanouts
The principle of intel_mark_busy() is that we want to spot the transition of when the display engine is being used in order to bump powersaving modes and increase display clocks. As such it is only important when the display is changing, i.e. when rendering to the scanout or other sprite/plane, and these are characterised by being pinned. v2: Mark the whole device as busy on execbuffer and pageflips as well and rebase against dinq for the minor bug fix to be immediately applicable. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> [danvet: fix compile fail.] Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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