+static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
+ struct drm_encoder *encoder,
+ struct drm_crtc *crtc,
+ struct drm_display_mode *mode)
+{
+ enum drm_mode_status ret;
+
+ ret = drm_encoder_mode_valid(encoder, mode);
+ if (ret != MODE_OK) {
+ DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n",
+ encoder->base.id, encoder->name);
+ return ret;
+ }
+
+ ret = drm_bridge_mode_valid(encoder->bridge, mode);
+ if (ret != MODE_OK) {
+ DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n");
+ return ret;
+ }
+
+ ret = drm_crtc_mode_valid(crtc, mode);
+ if (ret != MODE_OK) {
+ DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n",
+ crtc->base.id, crtc->name);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int
+mode_valid(struct drm_atomic_state *state)
+{
+ struct drm_connector_state *conn_state;
+ struct drm_connector *connector;
+ int i;
+
+ for_each_new_connector_in_state(state, connector, conn_state, i) {
+ struct drm_encoder *encoder = conn_state->best_encoder;
+ struct drm_crtc *crtc = conn_state->crtc;
+ struct drm_crtc_state *crtc_state;
+ enum drm_mode_status mode_status;
+ struct drm_display_mode *mode;
+
+ if (!crtc || !encoder)
+ continue;
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ if (!crtc_state)
+ continue;
+ if (!crtc_state->mode_changed && !crtc_state->connectors_changed)
+ continue;
+
+ mode = &crtc_state->mode;
+
+ mode_status = mode_valid_path(connector, encoder, crtc, mode);
+ if (mode_status != MODE_OK)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+