How to set default value of parameter input control in Ireport

SELECT
     r.designation AS designation,
     l.nom AS nom,
     e.gare AS gare,
     b.intitule AS intitule,
     a.code_mire AS code_mire,
     af.codegmao AS codegmaoAF,
     ap.codegmao AS codegmaoAP,
     d.cellule AS repere,
     d.observation AS observation,
     m.appareil AS appareil
FROM
      armoireprincipale ap
LEFT JOIN armoire a ON a.idbranchement = ap.idbranchement
LEFT JOIN armoirefille af ON af.idbranchement = a.idbranchement
LEFT JOIN branchement b ON b.idbranchement = a.idbranchement
LEFT JOIN ligne l ON l.id_ligne = b.id_ligne
LEFT JOIN reseau r ON r.id_reseau = l.id_reseau
LEFT JOIN edifice e ON e.indic = b.indic
LEFT JOIN depart d ON d.idbranchement = a.idbranchement
LEFT JOIN materiel m ON m.id_materiel = d.id_materiel
WHERE  a.idbranchement IN (SELECT b.idbranchement
            FROM branchement b0
            LEFT JOIN cable c ON c.idbranchement = b0.idbranchement
            LEFT JOIN cable_depart cb ON cb.id = c.id
            LEFT JOIN depart d0 ON d0.iddepart = cb.iddepart
            LEFT JOIN armoire a0 ON a0.idbranchement = d0.idbranchement
            LEFT JOIN armoireprincipale ap0 ON ap0.idbranchement = a0.idbranchement
            WHERE ap0.ug_pef= $P{id_pef}
) $P{choix_repere_depart};