[PATCH] tests/intel/xe_exec_reset: Replace hardcoded sleep with GT C6 polling

[Sk Anirban]

Replace insufficient sleep with extended GT C6 polling to ensure proper
power state transitions to RC6 and prevent subsequent RC6 test failures.

Signed-off-by: Sk Anirban <sk.anirban at intel.com>
---
 tests/intel/xe_exec_reset.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tests/intel/xe_exec_reset.c b/tests/intel/xe_exec_reset.c
index 7ae53c679..0c9503c7e 100644
--- a/tests/intel/xe_exec_reset.c
+++ b/tests/intel/xe_exec_reset.c
@@ -421,9 +421,12 @@ test_compute_mode(int fd, struct drm_xe_engine_class_instance *eci,
 			for (i = 0; i < n_exec_queues; i++)
 				xe_exec_queue_destroy(fd, exec_queues[i]);
 		}
+
+		igt_assert_f(igt_wait(xe_gt_is_in_c6(fd, eci->gt_id), 1000, 10),
+			     "GT %d failed to enter C6\n", eci->gt_id);
+
 		drm_close_driver(fd);
-		/* FIXME: wait for idle */
-		usleep(150000);
+
 		return;
 	}
 
-- 
2.43.0