https://bugs.freedesktop.org/show_bug.cgi?id=92974
--- Comment #9 from charlie bug0xa3d2@hushmail.com --- This commit:
"drm/amdgpu/powerplay/fiji: query supported pcie info from cgs (v2)"
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=6...
and everything after the above commit has the long boot bug.
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This commit:
"drm/amdgpu/powerplay/tonga: query supported pcie info from cgs (v2)"
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=2...
does not have the long boot bug on Fiji Nano.
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I did a "git reset --hard HEAD~49" (among others...) from the current git at "amd/powerplay: don't enable ucode fan control if vbios has no fan table" to eventually get to a normal boot.