Clayton Davis You may need a PhD in Ingmar Bergman to understand every nuance of French writer and director Mia Hansen-Løve’s “Bergman Island.” Still, the writer’s branch of the Academy may have enough of the qualifications to embrace its charming story. Even with delectable performances from its cast ensemble, most notably Mia Wasikowska in her finest acting effort yet, the small independent film will undoubtedly face significant challenges during awards season.