On 7/2/05, Peter Ronnquist <[EMAIL PROTECTED]> wrote: I've added the dri-devel and xorg mailing lists to the cc: list.
> If I have understood things correctly then X/x.org can > not provide a flicker free update of the graphics on a > display since the linux kernel does not provide a way > to synchronize to the vertical retrace of a display. > > See > http://lists.freedesktop.org/archives/xdg/2004-August/004561.html I don't know if that was true at the time it was written, but today the DRM implements vblank wait for 3 drivers (mga, r128, and radeon). However, as far as I can tell, none of the X server's 2d drivers makes use of it. Perhaps some more work is needed to make the interface convient for the X server? If you have a card supported by one of these drivers, you can move on to getting the X server to use that capability to support vblank counters in the XSync extension. http://freedesktop.org/~jg/roadmap.html#mozTocId921013 Then you only need for toolkits (and/or individual apps) to get with the program and start using using XSync. > If a person with little previous experience of the > linux kernel source tree would like to start on such a > feature then how complicated do you believe it is to > implement? (days or months of work) > > Where in the kernel source is a good place to start > looking? linux/drivers/char/drm/ is where the kernel drivers for graphics cards live. Here is an overview of the different pieces of the current drm/dri/xserver graphics puzzle: http://dri.freedesktop.org/wiki/DriverFiles -- Will Dyson ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id492&op=click -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
