backend/drm: use atomic test-only commits for direct scan-out

This allows callers to use wlr_output_test to figure out whether a
buffer can be scanned out prior to committing the output.

1 files changed, 3 insertions, 5 deletions

diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index 8e8fa6b7..b1be7c8c 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -399,13 +399,11 @@ static bool test_buffer(struct wlr_drm_connector *conn,
 		return false;
 	}
 
-	struct wlr_drm_fb *fb = NULL;
-	if (!drm_fb_import(&fb, drm, wlr_buffer, &crtc->primary->formats)) {
+	if (!drm_fb_import(&crtc->primary->pending_fb, drm, wlr_buffer,
+			&crtc->primary->formats)) {
 		return false;
 	}
-	drm_fb_clear(&fb);
-
-	return true;
+	return drm_crtc_commit(conn, DRM_MODE_ATOMIC_TEST_ONLY);
 }
 
 static bool drm_connector_test(struct wlr_output *output) {