[igt-dev] [PATCH i-g-t] tests/kms_plane_cursor: Wait for an extra vblank on AMD hw

[Aurabindo Pillai]

On AMD hardware, atomic cursor updates are not synchronized with the
same frame in the atomic code path, resulting in cursor programming
getting deferred to the next frame. Add a device specific quirk to
account for this delay.

Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
---
 tests/kms_plane_cursor.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/kms_plane_cursor.c b/tests/kms_plane_cursor.c
index e9abfd78..5af390e0 100644
--- a/tests/kms_plane_cursor.c
+++ b/tests/kms_plane_cursor.c
@@ -169,6 +169,11 @@ static void test_cursor_pos(data_t *data, int x, int y, unsigned int flags)
 	igt_plane_set_position(data->cursor, x, y);
 	igt_display_commit_atomic(&data->display, 0, NULL);
 
+	/* Wait for one more vblank since cursor updates are not
+	 * synchronized to the same frame on AMD hw */
+	if(is_amdgpu_device(data->drm_fd))
+		igt_wait_for_vblank_count(data->drm_fd, data->display.pipes[data->pipe_id].crtc_offset, 1);
+
 	igt_pipe_crc_get_current(data->drm_fd, data->pipe_crc, &test_crc);
 	igt_pipe_crc_stop(data->pipe_crc);
 
-- 
2.38.0