[igt-dev] [PATCH i-g-t] tests/kms_plane: survive cdclk caused modeset

[Juha-Pekka Heikkila]

This change will slow this test down a bit. In mid test starting
to use higher bpp pixel format (say 64bpp) can cause modeset.
Use blocking commit so there's wait for modeset to happen.

Fixes: https://gitlab.freedesktop.org/drm/intel/issues/1214
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
---
 tests/kms_plane.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tests/kms_plane.c b/tests/kms_plane.c
index 805795cd..2324fb6e 100644
--- a/tests/kms_plane.c
+++ b/tests/kms_plane.c
@@ -569,12 +569,10 @@ static void capture_format_crcs(data_t *data, enum pipe pipe,
 
 		if (data->display.is_atomic) {
 			/*
-			 * Use non-blocking commits to allow the next fb
-			 * to be prepared in parallel while the current fb
-			 * awaits to be latched.
+			 * Use blocking commit because there maybe
+			 * modeset when going to higher bpp pixel format.
 			 */
 			igt_display_commit_atomic(&data->display,
-						  DRM_MODE_ATOMIC_NONBLOCK |
 						  DRM_MODE_PAGE_FLIP_EVENT, NULL);
 		} else {
 			/*
-- 
2.17.1