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

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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: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201222113536.3775-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-12-22 11:35:35 +00:00
parent 48c508a516
commit 9559511b70
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/gt/selftest_lrc.c
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@ -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();