-static int drm_atomic_bridge_check(struct drm_bridge *bridge,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
-{
- if (bridge->funcs->atomic_check) {
- struct drm_bridge_state *bridge_state;
- int ret;
-
- bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
- bridge);
- if (WARN_ON(!bridge_state))
- return -EINVAL;
-
- ret = bridge->funcs->atomic_check(bridge, bridge_state,
- crtc_state, conn_state);
- if (ret)
- return ret;
- } else if (bridge->funcs->mode_fixup) {
- if (!bridge->funcs->mode_fixup(bridge, &crtc_state->mode,
- &crtc_state->adjusted_mode))
- return -EINVAL;
- }
-
- return 0;
-}
-
-/**
- * drm_atomic_bridge_chain_check() - Do an atomic check on the bridge chain
- * @bridge: bridge control structure
- * @crtc_state: new CRTC state
- * @conn_state: new connector state
- *
- * Calls &drm_bridge_funcs.atomic_check() (falls back on
- * &drm_bridge_funcs.mode_fixup()) op for all the bridges in the encoder chain,
- * starting from the last bridge to the first. These are called before calling
- * &drm_encoder_helper_funcs.atomic_check()
- *
- * RETURNS:
- * 0 on success, a negative error code on failure
- */
-int drm_atomic_bridge_chain_check(struct drm_bridge *bridge,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
-{
- struct drm_encoder *encoder = bridge->encoder;
- struct drm_bridge *iter;
-
- list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
- int ret;
-
- ret = drm_atomic_bridge_check(iter, crtc_state, conn_state);
- if (ret)
- return ret;
-
- if (iter == bridge)
- break;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(drm_atomic_bridge_chain_check);
-