git bisect start '--' 'drivers/gpu/drm/i915'
# good: [c470abd4fde40ea6a0846a2beab642a578c0b8cd] Linux 4.10
git bisect good c470abd4fde40ea6a0846a2beab642a578c0b8cd
# bad: [c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201] Linux 4.11-rc1
git bisect bad c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201
# good: [f50b79f096a7533e9b13638c06dfa759de070f56] drm/i915: Add dpll entrypoint for dumping hw state
git bisect good f50b79f096a7533e9b13638c06dfa759de070f56
# good: [3fec7ec4450fee2f18fe20088209193999d8ff94] drm/i915: Catch attempting to use the aliasing_gtt's drm_mm
git bisect good 3fec7ec4450fee2f18fe20088209193999d8ff94
# bad: [e4563f6ba71792c77aeccb2092cc23149b44e642] drm: Rely on mode_config data for fb_helper initialization
git bisect bad e4563f6ba71792c77aeccb2092cc23149b44e642
# good: [4ea9527cc03e73afc6a4ac5979d1ecde43b85cf3] drm/i915: Add a check that the VMA instance we lookup matches the request
git bisect good 4ea9527cc03e73afc6a4ac5979d1ecde43b85cf3
# good: [6146e6da5c961735dacf9b6c0c8b5f1382193ee2] drm/i915: reinstate call to trace_i915_vma_bind
git bisect good 6146e6da5c961735dacf9b6c0c8b5f1382193ee2
# good: [2643105558099a4703f8209f2cad768673aff12d] Merge branch 'drm-intel-next' of git://anongit.freedesktop.org/git/drm-intel into drm-next
git bisect good 2643105558099a4703f8209f2cad768673aff12d
# good: [c8127cf08ab9797c3954df463741ac47039d2b55] drm/edid: Introduce drm_default_rgb_quant_range()
git bisect good c8127cf08ab9797c3954df463741ac47039d2b55
# good: [779c4c2866150c1e5518d703b747f794f91f044c] drm/edid: Set AVI infoframe Q even when QS=0
git bisect good 779c4c2866150c1e5518d703b747f794f91f044c
# bad: [012bbe28c0e3a479ec7ba6f311710cf8409647d4] Merge tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc into drm-next
git bisect bad 012bbe28c0e3a479ec7ba6f311710cf8409647d4
# first bad commit: [012bbe28c0e3a479ec7ba6f311710cf8409647d4] Merge tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc into drm-next