[PATCH v2] tests/xe_pmu: Fix gt-frequency failure with raised min freq

[Sk Anirban <sk.anirban@intel.com>]

The gt-frequency subtest can fail when the min frequency has
already been raised above RPn before the test begins. Using that
value as the original minimum prevents the later min_freq write
from enabling the GuC ignore_efficient_freq parameter, so min_freq
can keep moving toward RPe.

Since RPe varies dynamically with thermal conditions, use RPn as the
fixed minimum baseline instead. This ensures that writing to min_freq
enables the ignore_efficient_freq GuC parameter.

v2: Fix commit message (Vinay)

Closes:https://gitlab.freedesktop.org/drm/xe/kernel/issues/8344
Signed-off-by: Sk Anirban <sk.anirban@intel.com>
Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
---
 tests/intel/xe_pmu.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tests/intel/xe_pmu.c b/tests/intel/xe_pmu.c
index fb4b871e7..4bbc801a1 100644
--- a/tests/intel/xe_pmu.c
+++ b/tests/intel/xe_pmu.c
@@ -903,10 +903,8 @@ static void test_gt_frequency(int fd, struct drm_xe_engine_class_instance *eci)
 	unsigned long config_rq_freq, config_act_freq;
 	double min[2], max[2];
 	uint32_t gt = eci->gt_id;
-	uint32_t orig_min = xe_gt_get_freq(fd, eci->gt_id, "min");
+	uint32_t orig_min = xe_gt_get_freq(fd, eci->gt_id, "rpn");
 	uint32_t orig_max = xe_gt_get_freq(fd, eci->gt_id, "max");
-	uint32_t current_min;
-	uint32_t orig_rpe;
 	uint32_t vm;
 	int pmu_fd[2];
 
@@ -956,9 +954,7 @@ static void test_gt_frequency(int fd, struct drm_xe_engine_class_instance *eci)
 	 * Restore min/max.
 	 */
 	igt_assert(xe_gt_set_freq(fd, gt, "min", orig_min) > 0);
-	orig_rpe = xe_gt_get_freq(fd, gt, "rpe");
-	current_min = xe_gt_get_freq(fd, gt, "min");
-	igt_assert(current_min == orig_min || current_min == orig_rpe);
+	igt_assert(xe_gt_get_freq(fd, gt, "min") == orig_min);
 
 	igt_info("Minimum frequency: requested %.1f, actual %.1f\n",
 		 min[0], min[1]);
-- 
2.43.0