[Intel-gfx] [PATCH] drm/i915/selftests: re-init the GT in live_gt_pm

[Daniele Ceraolo Spurio]

When GuC is in use we need to make sure it is re-loaded before the call
to gt_resume, otherwise communication from the engines to the GuC will
not be processed, which blocks the engines from ctx switching and from
being reset.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112205
Cc: Andi Shyti <andi.shyti at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_gt_pm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
index d1752f15702a..0bb17c806dfc 100644
--- a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
+++ b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c
@@ -11,8 +11,11 @@ static int live_gt_resume(void *arg)
 {
 	struct intel_gt *gt = arg;
 	IGT_TIMEOUT(end_time);
+	intel_wakeref_t wakeref;
 	int err;
 
+	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+
 	/* Do several suspend/resume cycles to check we don't explode! */
 	do {
 		intel_gt_suspend_prepare(gt);
@@ -25,6 +28,10 @@ static int live_gt_resume(void *arg)
 			break;
 		}
 
+		err = intel_gt_init_hw(gt);
+		if (err)
+			break;
+
 		err = intel_gt_resume(gt);
 		if (err)
 			break;
@@ -44,6 +51,8 @@ static int live_gt_resume(void *arg)
 		}
 	} while (!__igt_timeout(end_time, NULL));
 
+	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+
 	return err;
 }
 
-- 
2.23.0