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* [igt-dev] [PATCH i-g-t] igt/tests: Clear pipes properly in kms_atomic_transition
@ 2020-06-23 13:53 Stanislav Lisovskiy
  2020-06-23 15:00 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: Stanislav Lisovskiy @ 2020-06-23 13:53 UTC (permalink / raw)
  To: igt-dev; +Cc: juha-pekka.heikkila

There is an issue happening from time to time in kms_atomic_transition
(bug #1918). We periodically get assertion that some two outputs
attempt to use same pipe like this:

"Failed assertion: output->pending_pipe != b->pending_pipe"

After some investigation came to conclusion that this is happening
because we are calling igt_output_set_pipe(output, PIPE_NONE) only
for connected outputs, which is wrong.
Periodically igt_display_refresh/igt_output_refresh call calls can
update the output state to disconnected. However that doesn't clear
the pipe being assigned(i.e output->pending_pipe).
So this causes assertion to be triggered on next igt_display_refresh
called during commit.

Bugzilla: https://gitlab.freedesktop.org/drm/intel/-/issues/1918

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 tests/kms_atomic_transition.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/kms_atomic_transition.c b/tests/kms_atomic_transition.c
index 754a4969..a55388cd 100644
--- a/tests/kms_atomic_transition.c
+++ b/tests/kms_atomic_transition.c
@@ -665,8 +665,9 @@ static unsigned set_combinations(igt_display_t *display, unsigned mask, struct i
 	enum pipe pipe;
 	unsigned event_mask = 0;
 
-	for_each_connected_output(display, output)
-		igt_output_set_pipe(output, PIPE_NONE);
+	for_each_pipe(display, pipe)
+		for_each_valid_output_on_pipe(display, pipe, output)
+			igt_output_set_pipe(output, PIPE_NONE);
 
 	for_each_pipe(display, pipe) {
 		igt_plane_t *plane = igt_pipe_get_plane_type(&display->pipes[pipe],
-- 
2.24.1.485.gad05a3d8e5

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^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2020-06-30 13:11 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-06-23 13:53 [igt-dev] [PATCH i-g-t] igt/tests: Clear pipes properly in kms_atomic_transition Stanislav Lisovskiy
2020-06-23 15:00 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
2020-06-23 15:07 ` [igt-dev] [PATCH i-g-t] " Juha-Pekka Heikkila
2020-06-30 12:13   ` Maarten Lankhorst
2020-06-30 13:11     ` Lisovskiy, Stanislav
2020-06-23 21:56 ` [igt-dev] ✓ Fi.CI.IGT: success for " Patchwork

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