[igt-dev] [PATCH i-g-t 2/3] tests/kms_chamelium: Increase HPD storm threshold to 10 from 1

[Lyude]

From: Lyude Paul <lyude at redhat.com>

This is to adjust for the changes to how long pulses are counted towards
HPD storms that were made in https://patchwork.freedesktop.org/patch/260597/

Also, update the appropriate documentation in igt to reflect this.

Signed-off-by: Lyude Paul <lyude at redhat.com>
---
 lib/igt_debugfs.c     | 3 +++
 tests/kms_chamelium.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index a3aca846..358b4cab 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -557,6 +557,9 @@ static void igt_hpd_storm_exit_handler(int sig)
  * through debugfs. Useful for hotplugging tests where HPD storm detection
  * might get in the way and slow things down.
  *
+ * Note that each long HPD pulse will count as 10 towards the threshold, and
+ * short HPD pulses (if enabled) will count as 1 towards the threshold.
+ *
  * If the system does not support HPD storm detection, this function does
  * nothing.
  *
diff --git a/tests/kms_chamelium.c b/tests/kms_chamelium.c
index f051344d..0097dbcc 100644
--- a/tests/kms_chamelium.c
+++ b/tests/kms_chamelium.c
@@ -742,7 +742,7 @@ test_hpd_storm_detect(data_t *data, struct chamelium_port *port, int width)
 	igt_require_hpd_storm_ctl(data->drm_fd);
 	reset_state(data, port);
 
-	igt_hpd_storm_set_threshold(data->drm_fd, 1);
+	igt_hpd_storm_set_threshold(data->drm_fd, 10);
 	chamelium_fire_hpd_pulses(data->chamelium, port, width, 10, false);
 	igt_assert(igt_hpd_storm_detected(data->drm_fd));
 
-- 
2.19.1