backend/drm: remove SCANOUT check in drm_connector_test

We only accept SCANOUT, the buffer type should never be set to RENDER.

backend/drm/drm.c

@@ -466,8 +466,7 @@ static bool drm_connector_test(struct wlr_output *output) {
 		}
 	}
 
-	if ((output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
-			output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
+	if ((output->pending.committed & WLR_OUTPUT_STATE_BUFFER) && !conn->backend->parent) {
 		if (!drm_connector_set_pending_fb(conn, &output->pending)) {
 			return false;
 		}

backend/drm/legacy.c

@@ -36,7 +36,6 @@ static bool legacy_crtc_test(struct wlr_drm_connector *conn,
 	struct wlr_drm_crtc *crtc = conn->crtc;
 
 	if ((state->committed & WLR_OUTPUT_STATE_BUFFER) &&
-			state->buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT &&
 			!drm_connector_state_is_modeset(state)) {
 		struct wlr_drm_fb *pending_fb = crtc->primary->pending_fb;