BUG: *ERROR* No EDID read

[Daniel Andersson]

I get:
[drm:dc_link_detect [amdgpu]] *ERROR* No EDID read.
on boot. This started happening on 4.17 and is still an issue on 4.18-rc2.

I have a Vega64 connected on Display Port to a monitor(1440p). The monitor
doesn't have any additional ports so I can't test HDMI.

xrandr:
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 16384 x 16384
DisplayPort-0 connected 1024x768+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm
   1024x768      60.00*
   800x600       60.32    56.25
   848x480       60.00
   640x480       59.94
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-1 disconnected (normal left inverted right x axis y axis)

The 1440p resolution worked on 4.16.

Regards,
Daniel
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