backend/drm: allocate a CRTC in drm_connector_test
We can't perform a test-only atomic commit if the connector is
missing a CRTC.
@@ -414,6 +414,8 @@ static bool test_buffer(struct wlr_drm_connector *conn,
return drm_crtc_commit(conn, &conn->output.pending, DRM_MODE_ATOMIC_TEST_ONLY);
}
+static bool drm_connector_alloc_crtc(struct wlr_drm_connector *conn);
+
static bool drm_connector_test(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
@@ -427,6 +429,14 @@ static bool drm_connector_test(struct wlr_output *output) {
}
}
+ if (drm_connector_state_active(conn, &output->pending)) {
+ if (!drm_connector_alloc_crtc(conn)) {
+ wlr_drm_conn_log(conn, WLR_DEBUG,
+ "No CRTC available for this connector");
+ return false;
+ }
+ }
+
if ((output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
if (!test_buffer(conn, output->pending.buffer)) {
