A reverse-bisect (as per comment #8) shows that the first good commit is:
commit 14de6c44d149c68df1800ded42bbab51485ef67a Author: Maarten Lankhorst <email address hidden>
drm/atomic: Remove drm_atomic_connectors_for_crtc.
A reverse-bisect (as per comment #8) shows that the first good commit is:
commit 14de6c44d149c68 df1800ded42bbab 51485ef67a
Author: Maarten Lankhorst <email address hidden>
drm/atomic: Remove drm_atomic_ connectors_ for_crtc.