Fix up Dual X switch blocks

Marlin/Marlin_main.cpp

@@ -6948,6 +6948,9 @@ inline void gcode_M503() {
     stepper.synchronize();
     if (code_seen('S')) dual_x_carriage_mode = (DualXMode)code_value_byte();
     switch (dual_x_carriage_mode) {
+      case DXC_FULL_CONTROL_MODE:
+      case DXC_AUTO_PARK_MODE:
+        break;
       case DXC_DUPLICATION_MODE:
         if (code_seen('X')) duplicate_extruder_x_offset = max(code_value_axis_units(X_AXIS), X2_MIN_POS - x_home_pos(0));
         if (code_seen('R')) duplicate_extruder_temp_offset = code_value_temp_diff();
@@ -6962,9 +6965,6 @@ inline void gcode_M503() {
         SERIAL_CHAR(',');
         SERIAL_ECHOLN(hotend_offset[Y_AXIS][1]);
         break;
-      case DXC_FULL_CONTROL_MODE:
-      case DXC_AUTO_PARK_MODE:
-        break;
       default:
         dual_x_carriage_mode = DEFAULT_DUAL_X_CARRIAGE_MODE;
         break;
@@ -7254,9 +7254,9 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
             if (DEBUGGING(LEVELING)) {
               SERIAL_ECHOPGM("Dual X Carriage Mode ");
               switch (dual_x_carriage_mode) {
-                case DXC_DUPLICATION_MODE: SERIAL_ECHOLNPGM("DXC_DUPLICATION_MODE"); break;
-                case DXC_AUTO_PARK_MODE: SERIAL_ECHOLNPGM("DXC_AUTO_PARK_MODE"); break;
                 case DXC_FULL_CONTROL_MODE: SERIAL_ECHOLNPGM("DXC_FULL_CONTROL_MODE"); break;
+                case DXC_AUTO_PARK_MODE: SERIAL_ECHOLNPGM("DXC_AUTO_PARK_MODE"); break;
+                case DXC_DUPLICATION_MODE: SERIAL_ECHOLNPGM("DXC_DUPLICATION_MODE"); break;
               }
             }
           #endif
@@ -8974,7 +8974,11 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
    */
   inline bool prepare_move_to_destination_dualx() {
     if (active_extruder_parked) {
-      if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && active_extruder == 0) {
+      switch (dual_x_carriage_mode) {
+        case DXC_FULL_CONTROL_MODE:
+          break;
+        case DXC_DUPLICATION_MODE:
+          if (active_extruder == 0) {
             // move duplicate extruder into correct duplication position.
             planner.set_position_mm(
               LOGICAL_X_POSITION(inactive_extruder_x_pos),
@@ -8989,7 +8993,8 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
             extruder_duplication_enabled = true;
             active_extruder_parked = false;
           }
-      else if (dual_x_carriage_mode == DXC_AUTO_PARK_MODE) { // handle unparking of head
+          break;
+        case DXC_AUTO_PARK_MODE:
           if (current_position[E_AXIS] == destination[E_AXIS]) {
             // This is a travel move (with no extrusion)
             // Skip it, but keep track of the current position
@@ -9007,6 +9012,7 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
           planner.buffer_line(current_position[X_AXIS], current_position[Y_AXIS], raised_parked_position[Z_AXIS], current_position[E_AXIS], PLANNER_XY_FEEDRATE(), active_extruder);
           planner.buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], planner.max_feedrate_mm_s[Z_AXIS], active_extruder);
           active_extruder_parked = false;
+          break;
       }
     }
     return true;