From: Chris Wilson Date: Fri, 3 Apr 2020 19:02:09 +0000 (+0100) Subject: drm/i915/selftests: Wait until we start timeslicing after a submit X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=53f5da74c7a2ac355527ae20c09a4064a02815e7;p=linux.git drm/i915/selftests: Wait until we start timeslicing after a submit 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 Acked-by: Michael J. Ruhl Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20200403190209.21818-1-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index 985d4041d929c..a9ccfae54c247 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -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 =