Django-way of specifying channel image in rss feed

Found the right way of doing it. As the documentation describes, I needed to create a custom feed generator by subclassing from Rss201rev2Feed and overriding method

add_root_elements()

like this:

class RssFooFeedGenerator(Rss201rev2Feed):
    def add_root_elements(self, handler):
        super(RssFooFeedGenerator, self).add_root_elements(handler)
        handler.addQuickElement(u"image", '',
            {
                 'url': u"http://www.example.com/images/logo.jpg",
                 'title': u"Some title",
                 'link': u"http://www.example.com/", 
             })     

class RssFooFeed(Feed):
    feed_type = RssFooFeedGenerator
    title = u"Foo items"
    link = u"http://www.example.com/"
    description = u"Some description"