[Bug 107066] [Regression] Tonga can't bring up > 1 display since DC enablement

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107066

--- Comment #8 from Mikita Lipski <mikita.lipski at amd.com> ---
Created attachment 140625
  --> https://bugs.freedesktop.org/attachment.cgi?id=140625&action=edit
Don't share clk source between DP and other connectors

Hi Paul,
sorry for the previous comment that was a part of the message for another bug.
Anyways, I was able to reproduce a similar issue as yours with 4 connectors
plugged and only 2 would light up.
But in my case it was caused by DP and HDMI sharing the same clock source, but
since you're not using DP I wonder, what could have caused an issue for you.
I'm attaching 3 experimental patches:
1. 0001-drm-amdgpu-display-Don-t-share-clk-source-between-DP-an.patch
   This patch should fix the issue for DP connection with Tonga
2.0001-drm-amdgpu-display-update-clk-for-various-HDMI-color.patch
   Allows programming of HDMI2.0 and later on Tonga
3. 0001-Disable-source-clock-sharing-between-multiple-connec.patch
   Disable clock sharing by an early return 

Can you try if any of them work for you? 
Thanks

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