[PATCH i-g-t v4 3/7] lib/igt_kms: Commit primary plane when a modeset is forced on a pipe

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

In between tests, some tests can do the following sequence:

(pipe C configured with FB)
igt_plane_set_fb(primary (pipe C), NULL);
/* Clear rotation property first */
igt_display_commit2(display, COMMIT_UNIVERSAL);

/* disable pipe */
igt_display_commit2(display, COMMIT_LEGACY);

This would result in PIPE_C not being properly disabled, which
will cause an error on the next mode. This can be seen when running
the full kms_rotation_crc testcase without --subtest, it will fail
on exhaust-fences because the bad-tiling subtest wasn't able to
disable pipe C correctly.

Testcase: kms_rotation_crc
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 lib/igt_kms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index a5db6bc493c2..d25090b05c70 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -2332,7 +2332,7 @@ static int igt_primary_plane_commit_legacy(igt_plane_t *primary,
 	igt_assert(!primary->rotation_changed);
 
 	if (!primary->fb_changed && !primary->position_changed &&
-	    !primary->size_changed)
+	    !primary->size_changed && !primary->pipe->mode_changed)
 		return 0;
 
 	crtc_id = pipe->crtc_id;
-- 
2.14.1

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