Created attachment 130844 [details]
dmesg

Bisected to:

commit b95ff0319a829d5e707d64a3994c75f012f6b6ec
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon Apr 3 10:32:51 2017 +0200

    drm: Remove drm_modeset_(un)lock_crtc

    The last user, the cursor ioctl, can just open-code this too. We
    simply have to move the acquire ctx dance from the universal function
    up into the top-level ioctl handler.

    Reviewed-by: Harry Wentland <harry.wentland@amd.com>
    Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
    Link:
http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-3-daniel.vetter@ffwll.ch