From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 29 Nov 2019 22:27:02 +0000 (+0000)
Subject: drm/i915/selftests: Keep engine awake during live_coherency
X-Git-Tag: v5.6-rc1~114^2~17^2~252
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9a863c2ffc17f72137fae8cac3314961dc6be24;p=thirdparty%2Flinux.git

drm/i915/selftests: Keep engine awake during live_coherency

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@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191129222702.1456292-1-chris@chris-wilson.co.uk
---

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 9d3cd1af61f65..49edc51111d53 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;