[Bug 111913] AMD Navi10 GPU powerplay issues when using two DisplayPort connectors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111913

--- Comment #12 from Stefan Rehm <stefan at rehm.email> ---
If I change

dcn2_0_soc.dram_clock_change_latency_us

in "rivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c" from 404.0 to 10.0
(the value used in kernel 5.3) the messages disappear and the system behaves
normal again. However, as long as

/sys/class/drm/card0/device/power_dpm_force_performance_level

is set to "auto", I am now seeing massive flickering. Forcing it to low or high
fixes that.

According to the sources for kernel 5.3 the value of 10.0 for
dram_clock_change_latency is a hack. Can anyone elaborate on this?

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