On Tue, 18 Jun 2002 [EMAIL PROTECTED] wrote:
> From: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
> To: Linus Torvalds <[EMAIL PROTECTED]>,
>
> > - Interrupts
> >
> > You don't use these right now, and as far as I can tell the main
> > reason for using them would be to just synchronize page flipping
> > with the framerate. No?
>
> Which would be nice to have proper frame-sync on interlaced display
> (especially with Michel Danzer work on using DRM for Xv blits).
My two cents -- add this to the fbdev driver in a way that allows
DRM to use it from userspace. Matroxfb already has an IOCTL set,
which could be expanded to allow running an automatic page-flipper,
and perhaps have a hook on which to hang any handlers for DRM
drivers that for some reason really do need a kernel module.
Simple apps that don't use X or much 3d (directfb, GGI, SDL)
would really benefit from a unified pageflip/retrace API for fbdev,
and if that allows DRI development to take place in userspace
(and in so doing speed up development) so much the better.
--
Brian S. Julin
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