git bisect start
# bad: [42f1a013300dca601d779b02ed6d41f7b2cea362] Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next
git bisect bad 42f1a013300dca601d779b02ed6d41f7b2cea362
# good: [6e865c7230140126cbac62e0aef5807108e46e63] Merge tag 'drm/tegra/for-5.2-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
git bisect good 6e865c7230140126cbac62e0aef5807108e46e63
# good: [0a8d85e0a16051c06aa8ae6286dd434e719c55c6] drm/amd/display: 3.2.26
git bisect good 0a8d85e0a16051c06aa8ae6286dd434e719c55c6
# bad: [6491f0c05abd009631e0d0a33d671bb5a685847a] drm/amd/display: Add basic downscale and upscale valdiation
git bisect bad 6491f0c05abd009631e0d0a33d671bb5a685847a
# bad: [320932bfd9e30222f427811079323b6c86edf4da] drm/amd/display: Recalculate pitch when buffers change
git bisect bad 320932bfd9e30222f427811079323b6c86edf4da
# good: [f6ff2a08f49d565e38300f1a9d2f13359c7efc54] drm/amd/display: Maintain z-ordering when creating planes
git bisect good f6ff2a08f49d565e38300f1a9d2f13359c7efc54
# first bad commit: [320932bfd9e30222f427811079323b6c86edf4da] drm/amd/display: Recalculate pitch when buffers change