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SubjectRe: [REGRESSION] Too-low frequency limit for AMD GPU PCI-passed-through to Windows VM
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Hi all,

I finished the bisection (log below). The issue was introduced in
f9b7f3703ff9 ("drm/amdgpu/acpi: make ATPX/ATCS structures global (v2)").

Would any additional information be helpful?

git bisect start
# bad: [e73f0f0ee7541171d89f2e2491130c7771ba58d3] Linux 5.14-rc1
git bisect bad e73f0f0ee7541171d89f2e2491130c7771ba58d3
# good: [62fb9874f5da54fdb243003b386128037319b219] Linux 5.13
git bisect good 62fb9874f5da54fdb243003b386128037319b219
# bad: [e058a84bfddc42ba356a2316f2cf1141974625c9] Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm
git bisect bad e058a84bfddc42ba356a2316f2cf1141974625c9
# good: [a6eaf3850cb171c328a8b0db6d3c79286a1eba9d] Merge tag 'sched-urgent-2021-06-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good a6eaf3850cb171c328a8b0db6d3c79286a1eba9d
# good: [007b312c6f294770de01fbc0643610145012d244] Merge tag 'mac80211-next-for-net-next-2021-06-25' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
git bisect good 007b312c6f294770de01fbc0643610145012d244
# bad: [18703923a66aecf6f7ded0e16d22eb412ddae72f] drm/amdgpu: Fix incorrect register offsets for Sienna Cichlid
git bisect bad 18703923a66aecf6f7ded0e16d22eb412ddae72f
# good: [c99c4d0ca57c978dcc2a2f41ab8449684ea154cc] Merge tag 'amd-drm-next-5.14-2021-05-19' of https://gitlab.freedesktop.org/agd5f/linux into drm-next
git bisect good c99c4d0ca57c978dcc2a2f41ab8449684ea154cc
# good: [43ed3c6c786d996a264fcde68dbb36df6f03b965] Merge tag 'drm-misc-next-2021-06-01' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
git bisect good 43ed3c6c786d996a264fcde68dbb36df6f03b965
# bad: [050cd3d616d96c3a04f4877842a391c0a4fdcc7a] drm/amd/display: Add support for SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616.
git bisect bad 050cd3d616d96c3a04f4877842a391c0a4fdcc7a
# good: [f43ae2d1806c2b8a0934cb4acddd3cf3750d10f8] drm/amdgpu: Fix inconsistent indenting
git bisect good f43ae2d1806c2b8a0934cb4acddd3cf3750d10f8
# good: [6566cae7aef30da8833f1fa0eb854baf33b96676] drm/amd/display: fix odm scaling
git bisect good 6566cae7aef30da8833f1fa0eb854baf33b96676
# good: [5ac1dd89df549648b67f4d5e3a01b2d653914c55] drm/amd/display/dc/dce/dmub_outbox: Convert over to kernel-doc
git bisect good 5ac1dd89df549648b67f4d5e3a01b2d653914c55
# good: [a76eb7d30f700e5bdecc72d88d2226d137b11f74] drm/amd/display/dc/dce110/dce110_hw_sequencer: Include header containing our prototypes
git bisect good a76eb7d30f700e5bdecc72d88d2226d137b11f74
# good: [dd1d82c04e111b5a864638ede8965db2fe6d8653] drm/amdgpu/swsmu/aldebaran: fix check in is_dpm_running
git bisect good dd1d82c04e111b5a864638ede8965db2fe6d8653
# bad: [f9b7f3703ff97768a8dfabd42bdb107681f1da22] drm/amdgpu/acpi: make ATPX/ATCS structures global (v2)
git bisect bad f9b7f3703ff97768a8dfabd42bdb107681f1da22
# good: [f1688bd69ec4b07eda1657ff953daebce7cfabf6] drm/amd/amdgpu:save psp ring wptr to avoid attack
git bisect good f1688bd69ec4b07eda1657ff953daebce7cfabf6
# first bad commit: [f9b7f3703ff97768a8dfabd42bdb107681f1da22] drm/amdgpu/acpi: make ATPX/ATCS structures global (v2)

James

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