How to access the parent post from child post

Hello

Post Type 1 : ‘disque’ (custom post type)
Belongs to
Post type 2 : ‘artiste’ (custom post type)

I retrieve several ‘disque’ and for each one of them, I want to display the ‘artiste’ name (title).

Here is my code :

$args = array(
				'post_type' => 'disque',
				'numberposts' => '10',
				'orderby' => 'Post_date',
				'order' => 'DESC',
				);
		$p_query = new WP_Query($args);
		while ( $p_query->have_posts() ) :    $p_query->the_post();
                  //name of the 'disque'
		  echo get_post_meta($post->ID, 'wpcf-album', true);
		//Trying to get the parent (= the 'artiste' to which the 'disque' belongs
                $parent = wp_get_post_parent_id($post->ID);//Also tried with $post
		$parent_post = get_post($parent);
			echo $parent_post->post_title;
			echo $parent_post->post_permalink;
			echo '<br/>';
	        endwhile ?>

With this method, I thought I would for each ‘disque’ in the loop retrieve its parent (‘artiste’). But for each ‘disque’, I get the same disque as parent. Don(t know if it’s clear.

I’m quite sure there is an easier way to access a parent from a child (and maybe, in the case of a belongs to relationship we cannot say parent and child).

Well, a bit confused.

Thx for your help