drm/i915: Improve the start alignment of bonded pairs
Always wait on the start of the signaler request to reduce the problem of dequeueing the bonded pair too early -- we want both payloads to start at the same time, with no latency, and yet still allow others to make full use of the slack in the system. This reduce the amount of time we spend waiting on the semaphore used to synchronise the start of the bonded payload. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200306133852.3420322-3-chris@chris-wilson.co.uk
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