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drm/i915/selftests: Wait until we start timeslicing after a submit

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If we submit, we do not start timeslicing until we process the CS event
that marks the start of the context running on HW. So in the selftest,
be sure to wait until we have processed the pending events before
asserting that timeslicing has begun.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200403190209.21818-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-04-03 20:02:09 +01:00
parent 614654abe8
commit 53f5da74c7
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/i915/gt/selftest_lrc.c
View file

@ -1244,7 +1244,12 @@ static int live_timeslice_queue(void *arg)
if (err)
goto err_rq;
intel_engine_flush_submission(engine);
/* Wait until we ack the release_queue and start timeslicing */
do {
cond_resched();
intel_engine_flush_submission(engine);
} while (READ_ONCE(engine->execlists.pending[0]));
if (!READ_ONCE(engine->execlists.timer.expires) &&
!i915_request_completed(rq)) {
struct drm_printer p =