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Since we have a sequence of register reads and writes, we can reduce the latency of starting the BSD ring by performing all the mmio operations under the same forcewake wakeref. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1467297225-21379-62-git-send-email-chris@chris-wilson.co.uk