[maemo-developers] [maemo-developers] examining n800 kernel

From: Gustavo Sverzut Barbieri barbieri at gmail.com
Date: Wed Jan 17 05:23:47 EET 2007
On 1/16/07, Daniel Stone <daniel.stone at nokia.com> wrote:
> > OMAP1 uses something called SOSSI, OMAP2 calls it RFBI (remote frame
> > buffer ...) Interesting is that omap framebuffer driver now contains
> > code for synchronization on vblank and preventing tearing effect. It is
> > both in omapfb/blizzard/rfbi code for n800 and also for
> > omapfb/hwa472/sossi code for n770!
> Yes: we use this to do vsync for video from the X server.

Is there any way to ge this vsync signal? Canola and a great deal of
SDL applications may use it to avoid tearing effect... actually we
should do it in SDL to avoid duplicate work.

while on 770 we rarely had tearing, but now, with faster software, we
often update pixmaps while X is refreshing.

X with backingstore would fix this, since it would handle
double-buffering for us.

Gustavo Sverzut Barbieri
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