[Bug 200667] [AMDGPU] stacktrace in dmesg, starting at drm_dp_i2c_do_msg

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=200667

--- Comment #6 from Alex Deucher (alexdeucher at gmail.com) ---
The warning is harmless.  As per the commit message, this is fixed properly for
4.19 with the following patches:

    This breaks DDC in certain cases.  Revert for 4.18 and previous kernels.
    For 4.19, this is fixed with the following more extensive patches:
    drm/amd/display: Serialize is_dp_sink_present
    drm/amd/display: Break out function to simply read aux reply
    drm/amd/display: Return aux replies directly to DRM
    drm/amd/display: Right shift AUX reply value sooner than later
    drm/amd/display: Read AUX channel even if only status byte is returned

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