[Bug 93866] Tonga: Weston-drm direct scan out corruption

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Bug ID 93866
Summary Tonga: Weston-drm direct scan out corruption
Product DRI
Version DRI git
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter adf.lists@gmail.com

Created attachment 121287 [details]
external picture showing corruption

Testing both release and git wayland/weston on R9285.

Using weston-launch from fbcon so it uses weston-drm.

Apart from https://bugs.freedesktop.org/show_bug.cgi?id=93740 which can be
worked around, rendering is good when compositing.

If I run something that allows weston to enable direct scanout there is slight
corruption. kodi and mpv are the only ways I know to do this.

If I do something that changes back yo compositing the corruption goes, taking
a screen shot/recording or zooming in will all "fix" the corruption.

I am inferring direct scan out is happening as I can't change transparency +
the man page for weston-drm says it will be used where possible.

Tried going back in time with mesa to see if it ever worked, but I started
hitting places where either weston wouldn't start or I always got compositing
so no corruption but I could change transparency.


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