[igt-dev] [PATCH i-g-t] i915/i915_pm_rps: Actual freq can be 0 when idle or in RC6

[Ashutosh Dixit <ashutosh.dixit@intel.com>]

From: Vinay Belgaumkar <vinay.belgaumkar@intel.com>

Actual freq read from sysfs can be 0, i.e. less than RPn, in certain
situations. For example when the device is idle (without the runtime PM
wakeref) actual freq read from sysfs will be 0. Also on Gen12+ actual freq
read from HW will be 0 in RC6. Therefore modify checks comparing actual
freq with RPn.

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
---
 tests/i915/i915_pm_rps.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/i915/i915_pm_rps.c b/tests/i915/i915_pm_rps.c
index db39ec69865c..4865ed1f0042 100644
--- a/tests/i915/i915_pm_rps.c
+++ b/tests/i915/i915_pm_rps.c
@@ -483,14 +483,15 @@ static void idle_check(void)
 		read_freqs(freqs);
 		dump(freqs);
 		check_freq_constraints(freqs);
-		if (freqs[ACT] == freqs[RPn])
+		if (freqs[ACT] <= freqs[RPn])
 			break;
 		usleep(1000 * IDLE_WAIT_TIMESTEP_MSEC);
 		wait += IDLE_WAIT_TIMESTEP_MSEC;
 	} while (wait < IDLE_WAIT_TIMEOUT_MSEC);
 
 	igt_debugfs_dump(drm_fd, "i915_rps_boost_info");
-	igt_assert_eq(freqs[ACT], freqs[RPn]);
+	/* Actual freq may be 0 when idle or in RC6 */
+	igt_assert_lte(freqs[ACT], freqs[RPn]);
 	igt_debug("Required %d msec to reach cur=idle\n", wait);
 }
 
-- 
2.34.1