On Wed, Feb 4, 2015 at 12:23 PM, Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx> wrote: > Hello, > > I'm currently adding support for atomic operations (or atomic > modesetting) in the Atmel HLCDC driver. > Everything is pretty much in place, and all the features provided by the > current driver are working as expected. > However, there's one feature I'd like to add (actually I was hoping > atomic support could help me deal with this feature), and I not sure > how to do it. > > The HLCDC IP provides a way to discard a specific area on the primary > plane (in case at least one of the overlay is activated and alpha > blending is disabled). > Doing this will reduce the amount of data to transfer from the main > memory to the Display Controller, and thus alleviate the load on the > memory bus (since this link is quite limited on such hardware, > this kind of optimization is really important). > > My problem here is that there is no way, in the current atomic > implementation, to internally ask for a plane state modification. > > Is there a plan to add such hooks that would be called after the > requested state modifications (i.e. operations done before the > drm_atomic_commit call in all helper functions), but before the atomic > checks begin (i.e. call to drm_atomic_check_only) ? > Such hooks would let me ask for a primary plane update (modifying the > discard area property) if needed. Maybe just wrap drm_atomic_helper_commit() w/ your own fxn that did extra fixup and then called drm_atomic_helper_commit()? BR, -R > Maybe I'm totally mistaken in my approach to solve this problem, so > please let me know if you see other solutions. > > Thanks. > > Best Regards, > > Boris > > -- > Boris Brezillon, Free Electrons > Embedded Linux and Kernel engineering > http://free-electrons.com _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
