drm/i915: Tweak scheduler's kick_submission()

Skip useless priority bumping on adding a new dependency by making sure
that we do update the priority if we would have rescheduled the active
cotnext.

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/20200310115947.6482-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index af51810dc78c7b54c094bd103773f52e093327fc..68b06a7ba667da3dfd74421aff77f5935eaf0f80 100644 (file)
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -209,6 +209,8 @@ static void kick_submission(struct intel_engine_cs *engine,
        if (!inflight)
                goto unlock;
 
+       engine->execlists.queue_priority_hint = prio;
+
        /*
         * If we are already the currently executing context, don't
         * bother evaluating if we should preempt ourselves.
@@ -216,7 +218,6 @@ static void kick_submission(struct intel_engine_cs *engine,
        if (inflight->context == rq->context)
                goto unlock;
 
-       engine->execlists.queue_priority_hint = prio;
        if (need_preempt(prio, rq_prio(inflight)))
                tasklet_hi_schedule(&engine->execlists.tasklet);