[Intel-gfx] [PATCH] drm/i915/selftests: Keep engine awake during live_coherency

[Chris Wilson]

Keep the engine awake and so avoid frequent cycling in and out of
powersaving mode to eliminate the unnecessary overhead and speed up the
testing.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
index 9d3cd1af61f6..49edc51111d5 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
@@ -327,6 +327,7 @@ static int igt_gem_coherency(void *arg)
 	ctx.engine = random_engine(i915, &prng);
 	GEM_BUG_ON(!ctx.engine);
 	pr_info("%s: using %s\n", __func__, ctx.engine->name);
+	intel_engine_pm_get(ctx.engine);
 
 	for (over = igt_coherency_mode; over->name; over++) {
 		if (!over->set)
@@ -405,6 +406,7 @@ static int igt_gem_coherency(void *arg)
 		}
 	}
 free:
+	intel_engine_pm_put(ctx.engine);
 	kfree(offsets);
 	return err;
 
-- 
2.24.0