A patch referencing this bug report has been merged in Linux v3.7-rc1:

commit 7434a255a5cf42819b7e42377f18aaa02f6be52b
Author: Thomas Richter <thor@math.tu-berlin.de>
Date:   Wed Jul 18 19:22:30 2012 +0200

    drm/i915: Support for ns2501-DVO