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e8695100b1
When using reverse prime we do 2 copies, 1 from the primary GPU's framebuffer to a shared pixmap and 1 from the shared pixmap to the secondary GPU's framebuffer. This means that on the primary GPU side the copy MUST be finished, before we start the second copy (before the secondary GPU's driver starts processing the damage on the shared pixmap). This fixes secondary outputs sometimes showning (some) old fb contents, because of the 2 copies racing with each other, for an example of what this looks like see: https://fedorapeople.org/~jwrdegoede/IMG_20160915_130555.jpg Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Eric Anholt <eric@anholt.net>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
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http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
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git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
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http://www.x.org/wiki/Development/Documentation/SubmittingPatches
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