The kernel doesn't like it when you set max_freq < min_freq and
complains bitterly. So before setting max_freq = min_freq, first set
min_freq to min_freq!
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
tests/perf_pmu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
index bcb90c84..b8422211 100644
--- a/tests/perf_pmu.c
+++ b/tests/perf_pmu.c
@@ -946,6 +946,8 @@ test_frequency(int gem_fd)
min_freq = igt_sysfs_get_u32(sysfs, "gt_RPn_freq_mhz");
max_freq = igt_sysfs_get_u32(sysfs, "gt_RP0_freq_mhz");
boost_freq = igt_sysfs_get_u32(sysfs, "gt_boost_freq_mhz");
+ igt_info("Frequency: min=%u, max=%u, boost=%u MHz\n",
+ min_freq, max_freq, boost_freq);
igt_require(min_freq > 0 && max_freq > 0 && boost_freq > 0);
igt_require(max_freq > min_freq);
igt_require(boost_freq > min_freq);
@@ -956,6 +958,8 @@ test_frequency(int gem_fd)
/*
* Set GPU to min frequency and read PMU counters.
*/
+ igt_require(igt_sysfs_set_u32(sysfs, "gt_min_freq_mhz", min_freq));
+ igt_require(igt_sysfs_get_u32(sysfs, "gt_min_freq_mhz") == min_freq);
igt_require(igt_sysfs_set_u32(sysfs, "gt_max_freq_mhz", min_freq));
igt_require(igt_sysfs_get_u32(sysfs, "gt_max_freq_mhz") == min_freq);
igt_require(igt_sysfs_set_u32(sysfs, "gt_boost_freq_mhz", min_freq));
--
2.15.0
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