[Bug 208947] amdgpu DisplayPort won't recognize all display modes after 5.9 merges

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https://bugzilla.kernel.org/show_bug.cgi?id=208947

--- Comment #8 from Coleman Kane (ckane@xxxxxxxxxxxxxxx) ---
Update - below is the finding from git bisect:

471c1dd9546df81d259664ac3e2ab0e99169f755 is the first bad commit
commit 471c1dd9546df81d259664ac3e2ab0e99169f755
Author: Reza Amini <Reza.Amini@xxxxxxx>
Date:   Wed Jul 15 11:33:23 2020 -0400

    drm/amd/display: Allow asic specific FSFT timing optimization

    [Why]
    Each asic can optimize best based on its capabilities

    [How]
    Optimizing timing for a new pixel clock

    Signed-off-by: Reza Amini <Reza.Amini@xxxxxxx>
    Reviewed-by: Anthony Koo <Anthony.Koo@xxxxxxx>
    Acked-by: Eryk Brol <eryk.brol@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>

 drivers/gpu/drm/amd/display/dc/core/dc_stream.c    | 18 +++++++--------
 drivers/gpu/drm/amd/display/dc/dc_stream.h         |  4 ++--
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 27 ++++++++++++++++++++++
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h |  5 ++++
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c  |  3 +++
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c  |  3 +++
 drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h  |  5 ++++
 .../drm/amd/display/modules/freesync/freesync.c    |  5 +++-
 8 files changed, 57 insertions(+), 13 deletions(-)

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