Add a second custom loop for CPT to a front page template in Genesis that won't effect the defailt loop.

front-page.php

<?php


//* Add markup for homepage portfolio
add_action( 'genesis_after_header', 'minimum_home_portfolio', 20 );
function minimum_home_portfolio() {

	printf( '<div %s>', genesis_attr( 'home-portfolio' ) );
	genesis_structural_wrap( 'home-portfolio' );

		
        	$args = array(
		              'post_type' => 'portfolio',
		              'order' => 'DESC',
				          'posts_per_page' => 4
	        );
	        $loop = new WP_Query( $args );
	        if( $loop->have_posts() ): while( $loop->have_posts() ): $loop->the_post();
		              
									
									do_action( 'genesis_before_entry' );
									printf( '<article %s>', genesis_attr( 'entry' ) );
									
									      do_action( 'genesis_before_entry_content' );
                        printf( '<div %s>', genesis_attr( 'entry-content' ) );
												        if ( $image = genesis_get_image( 'format=url&size=portfolio' ) ) {
		                            printf( '<div class="portfolio-image"><a href="%s" rel="bookmark"><img src="%s" alt="%s" /></a></div>', get_permalink(), $image, the_title_attribute( 'echo=0' ) );
	                              }
                        echo '</div>'; //** end .entry-content
                        do_action( 'genesis_after_entry_content' );
												echo '<h1 itemprop="headline" class="entry-title"><a href="' . get_permalink() . '">' . get_the_title() . '</a></h1>';
												
									echo '</article>';
									do_action( 'genesis_after_entry' );
									
	        endwhile; endif; wp_reset_postdata();
		
		
		

	genesis_structural_wrap( 'home-portfolio', 'close' );
	echo '</div>'; //* end .home-portfolio

}