path: root/Documentation/DocBook/drm.tmpl
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authorGerd Hoffmann <kraxel@redhat.com>2015-05-05 13:52:49 +0200
committerDave Airlie <airlied@redhat.com>2015-05-07 13:09:25 +1000
commitc0fe07aa50befe2e6e6525181e2080377a1c1494 (patch)
tree1aa26df1860935e13dffa4c04d6611adbf9d3154 /Documentation/DocBook/drm.tmpl
parentMerge tag 'topic/drm-misc-2015-05-06' of git://anongit.freedesktop.org/drm-intel into drm-next (diff)
drm/qxl: rewrite framebuffer support
Completely different approach: Instead of encoding each and every framebuffer update as spice operation simply update the shadow framebuffer and maintain a dirty rectangle. Also schedule a worker to push an update for the dirty rectangle as spice operation. Usually a bunch of dirty rectangle updates are collected before the worker actually runs. What changes: Updates get batched now. Instead of sending tons of small updates a few large ones are sent. When the same region is updated multiple times within a short timeframe (scrolling multiple lines for example) we send a single update only. Spice server has an easier job now: The dependency tree for display operations which spice server maintains for lazy rendering is alot smaller now. Spice server's image compression probably works better too with the larger image blits. Net effect: framebuffer console @ qxldrmfb is an order of magnitude faster now. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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