[Bug 58121] Radeon SUMO: LVDS panel blanks when enabling external monitor

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=58121

--- Comment #7 from Alex Deucher <alexdeucher at gmail.com> ---
Created attachment 127441
  --> https://bugzilla.kernel.org/attachment.cgi?id=127441&action=edit
updated version of the patch

The patch looks good.  We already disable PLL sharing for non-DP displays, so
we should also disable it for DP displays as well.  DCE4.1 only supports 2
displays anyway so sharing doesn't really buy us much.  I updated the patch
slightly to make the logic a little cleaner.  I'll add it to my -fixes queue.

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