Autoship Customization // Require N Number of Autoship Products for Valid Coupon

functions.php

  function increase_required_cart_qty( $count ){
    return $count >= 3;
  }
  function autoship_adjust_coupon_is_valid( $valid, $coupon ) {

    add_filter( 'autoship_valid_cart_total_min_required','increase_required_cart_qty', 10, 1);
    $valid = autoship_cart_has_valid_autoship_items();
    remove_filter( 'autoship_valid_cart_total_min_required','increase_required_cart_qty');

    return $valid;

  }
  add_action( 'woocommerce_coupon_is_valid', 'autoship_adjust_coupon_is_valid', 12, 3 );