[Intel-gfx] [PATCH 04/22] drm/i915/gt: Always check to enable timeslicing if not submitting

[Chris Wilson]

We may choose not to submit for a number of reasons, yet not fill both
ELSP. In which case we must start timeslicing (there will be no ACK
event on which to hook the start) if the queue would benefit from the
currently active context being evicted.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index c27f4279ae53..d95b5261f59f 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2358,10 +2358,8 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
 				if (last->context == rq->context)
 					goto done;
 
-				if (i915_request_has_sentinel(last)) {
-					start_timeslice(engine, rq_prio(rq));
+				if (i915_request_has_sentinel(last))
 					goto done;
-				}
 
 				/*
 				 * If GVT overrides us we only ever submit
@@ -2442,6 +2440,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
 		set_preempt_timeout(engine, *active);
 		execlists_submit_ports(engine);
 	} else {
+		start_timeslice(engine, execlists->queue_priority_hint);
 skip_submit:
 		ring_set_paused(engine, 0);
 	}
-- 
2.20.1