[Bug 108542] hdmi issues with kernel 4.18

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Comment # 5 on bug 108542 from
> The log you posted should be sufficient. I'm not sure about a timeline for a
> fix, however.

Couldn't you just reverse the commits ?

I did complete the bisection btw:

691f2d763d0731224439686ecf2d440df8fe910e is the first bad commit
commit 691f2d763d0731224439686ecf2d440df8fe910e
Author: Mikita Lipski <mikita.lipski@amd.com>
Date:   Fri Jul 13 09:07:35 2018 -0400

    drm/amd/display: update clk for various HDMI color depths

    commit 81aca8e75c1b046865fb2badef95a0dcff6f73de upstream.

    [why]
    When programming tonga's connector's backend we didn't take
    in account that HDMI's colour depth might be more than 8bpc
    therefore we need to add a switch statement that would adjust
    the pixel clock accordingly.

    [how]
    Add a switch statement updating clock by its appropriate
    coefficient.

    Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
    Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
    Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

:040000 040000 ef9f989910439dc8749f1440863e3e26646d5fa1
c9ae9b8a137f9ef9d62147fcc28ea25fc4ffbc1e M      drivers


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