Re: Using the radeon CP engine for Xv
If I have time I may take a look at it. One thing I've noticed is that Xv doesn't seem to work too well when I have a 3D app running. Converting Xv to use the CP may help that. Alex --- Michel Dänzer <[EMAIL PROTECTED]> wrote: > On Thu, 2003-08-14 at 17:45, Alex Deucher wrote: > > If the CP is enabled for acceleration on the radeon, could I also > use > > it to issue Xv commands rather than using mmio? It looks like it > > should be possible. I'd be willing to give it a try. would any > sort > > of special locking be required or can I just issue the commands to > the > > ring like the accel code does? > > The latter. > > > What kind of speed up would I expect if any? > > None I guess, as Xv involves relatively little register write > overhead. > > Even if you mean transferring the image data as the r128 driver can, > I'm > not sure it's worth the effort as direct writes to the framebuffer > seem > to be at least as fast on well-configured current systems. > > That being said, using the CP for all (or as many as reasonable) > register writes would have the benefit of not stalling the CP. Might > yield slightly better performance when mixing stuff which does and > doesn't currently use it. > __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Re: Using the radeon CP engine for Xv
On Thu, 2003-08-14 at 17:45, Alex Deucher wrote: > If the CP is enabled for acceleration on the radeon, could I also use > it to issue Xv commands rather than using mmio? It looks like it > should be possible. I'd be willing to give it a try. would any sort > of special locking be required or can I just issue the commands to the > ring like the accel code does? The latter. > What kind of speed up would I expect if any? None I guess, as Xv involves relatively little register write overhead. Even if you mean transferring the image data as the r128 driver can, I'm not sure it's worth the effort as direct writes to the framebuffer seem to be at least as fast on well-configured current systems. That being said, using the CP for all (or as many as reasonable) register writes would have the benefit of not stalling the CP. Might yield slightly better performance when mixing stuff which does and doesn't currently use it. -- Earthling Michel Dänzer \ Debian (powerpc), XFree86 and DRI developer Software libre enthusiast \ http://svcs.affero.net/rm.php?r=daenzer ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Using the radeon CP engine for Xv
If the CP is enabled for acceleration on the radeon, could I also use it to issue Xv commands rather than using mmio? It looks like it should be possible. I'd be willing to give it a try. would any sort of special locking be required or can I just issue the commands to the ring like the accel code does? What kind of speed up would I expect if any? Alex __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
