For the most part, the driver should just implement sensible power management itself. We don't want users to have to define complex power management policies. In almost every case, if the user triggers a graphics operation then they want it to complete as quickly as possible. Autmatically upclocking in response to this is pretty easy on most hardware. The only real problem comes with reclocking RAM on a multi-head system. This has to be done during the vblank interval to avoid data corruption, but syncing the vblanks on both displays may well be difficult or impossible.
There's a small number of cases where we can't reconfigure a power management state on the fly - the number of PCIe lanes is an example of this. Changing it simply takes too long, and we drop several frames in the process. The right kind of interface for that does require some thought. -- Matthew Garrett | mj...@srcf.ucam.org ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
