Commits
Chris Wilson committed 74cfd7ac5e1
drm/i915: Skip modifying PCH DREF if not changing clock sources Modifying the clock sources (via the DREF control on the PCH) is a slow multi-stage process as we need to let the clocks stabilise between each stage. If we are not actually changing the clock sources, then we can return early. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Jani Nikula <jani.nikula@intel.com> [danvet: Appease checkpatch by deleting a space after a ~] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>