[Bug 108322] RX580 Display flickering after waking from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108322

--- Comment #12 from bmilreu at gmail.com ---
Created custom modes and forced it into xrandr. 75hz flickers, but 73hz is
working fine it seems. This is on last amd-drm-next-staging 

~ >>> gtf 1920 1080 73                                                          

  # 1920x1080 @ 73.00 Hz (GTF) hsync: 82.20 kHz; pclk: 214.37 MHz
  Modeline "1920x1080_73.00"  214.37  1920 2056 2264 2608  1080 1081 1084 1126 
-HSync +Vsync
~ >>> xrandr --newmode "1920x1080_73.00"  214.37  1920 2056 2264 2608  1080
1081 1084 1126  -HSync +Vsync                                                  
     [130]
~ >>> xrandr --addmode DisplayPort-0 "1920x1080_73.00"                          
~ >>> xrandr --output DisplayPort-0 --mode "1920x1080_73.00"                    

Will keep it like this for now and test it in games, but in kde plasma/chromium
73hz is smooth as silk it seems. Another thing I noticed is gtf generates
higher pixel clocks than the ones from my monitor (edid?). You can compare
above result with the attached xorg log.

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