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stifb: Implement hardware accelerated copyarea
authorAlex Ivanov <lausgans@gmail.com>
Mon, 15 Jun 2015 05:50:45 +0000 (08:50 +0300)
committerHelge Deller <deller@gmx.de>
Fri, 10 Jul 2015 19:44:19 +0000 (21:44 +0200)
commitcb908ed3495496b9973a2b9ed1a60f43933fdf01
tree6e7e6f68b2288d7d38c12d486d9f17a303808ba8tree | snapshot
parentc4b5fd3fb2058b650447372472ad24e2a989f9f6commit | diff
stifb: Implement hardware accelerated copyarea

This patch adds hardware assisted scrolling. The code is based upon the
following investigation: https://parisc.wiki.kernel.org/index.php/NGLE#Blitter

A simple 'time ls -la /usr/bin' test shows 1.6x speed increase over soft
copy and 2.3x increase over FBINFO_READS_FAST (prefer soft copy over
screen redraw) on Artist framebuffer.

Signed-off-by: Alex Ivanov <lausgans@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
drivers/video/fbdev/stifb.c diff | blob | history
John Crispins staging tree