git bisect start '--' 'drivers/gpu/drm'
# 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
# good: [c4d79c22015564a9d922715434a0ec09d1deee30] Reinstate "drm/probe-helpers: Drop locking from poll_enable""
git bisect good c4d79c22015564a9d922715434a0ec09d1deee30
# good: [bf2f04366c1e3920fb23b57226ecb39207b1a104] drm/i915: Introduce engine_stalled helper
git bisect good bf2f04366c1e3920fb23b57226ecb39207b1a104
# good: [a5b2b6ebf34b20e70a2bdb5214c371744e7fa260] drm/sti: Fix compilation failure for drm_framebuffer.pixel_format
git bisect good a5b2b6ebf34b20e70a2bdb5214c371744e7fa260
# good: [3a5e6bb9c660173cf6a1a3f29b0501553cd4db2f] Merge tag 'zxdrm-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into drm-next
git bisect good 3a5e6bb9c660173cf6a1a3f29b0501553cd4db2f
# bad: [59defa7cb68b9beed997848c2914e03f4a362182] drm/etnaviv: Remove etnaviv_debugfs_cleanup()
git bisect bad 59defa7cb68b9beed997848c2914e03f4a362182
# bad: [ba0c6d0087510b5db4d4b4f96f202bc893844c55] drm/atomic: Remove drm_atomic_debugfs_cleanup()
git bisect bad ba0c6d0087510b5db4d4b4f96f202bc893844c55
# bad: [086f2e5cde747dcae800b2d8b0ac7741a8c6fcbe] drm: debugfs: Remove all files automatically on cleanup
git bisect bad 086f2e5cde747dcae800b2d8b0ac7741a8c6fcbe
# bad: [fcc8a22cc9053a8d1bbb94833ec103cd5961feef] drm/edid: Set YQ bits in the AVI infoframe according to CEA-861-F
git bisect bad fcc8a22cc9053a8d1bbb94833ec103cd5961feef
# first bad commit: [fcc8a22cc9053a8d1bbb94833ec103cd5961feef] drm/edid: Set YQ bits in the AVI infoframe according to CEA-861-F