Commit 9559511b authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/selftests: Flush the preemption request before waiting 



Make sure that the request has been submitted to HW before we begin our
wait. This reduces our reliance on the semaphore yield interrupt driving
the preemption request.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201222113536.3775-2-chris@chris-wilson.co.uk
parent 48c508a5

drivers/gpu/drm/i915/gt/selftest_lrc.c

+4 −0
Original line number Diff line number Diff line
@@ -607,6 +607,10 @@ static int __live_lrc_gpr(struct intel_engine_cs *engine, 
		err = emit_semaphore_signal(engine->kernel_context, slot);

		if (err)

			goto err_rq;



		err = wait_for_submit(engine, rq, HZ / 2);

		if (err)

			goto err_rq;

	} else {

		slot[0] = 1;

		wmb();