On Thu, 2015-09-17 at 14:47 +0100, David Chisnall wrote: > On 17 Sep 2015, at 14:41, Lundberg, Johannes < > johan...@brilliantservice.co.jp> wrote: > > > > However, the problem now is not the driver right? But the whole > > graphics > > stack which has to be rewritten to work with new generation > > graphics like > > KMS, Wayland, etc? > > There are lots of different components here that you’re conflating: > > - KMS is the thing that allows the kernel to be responsible for > setting the graphics mode, restoring it on context switches and so > on. This has worked on FreeBSD for a while. > > - GEM / TTM are memory managers, they allow the kernel to manage > memory (video memory and main memory allocated to the GPU) for GPU > -using drivers. These work on FreeBSD, but the supported version > lags Linux slightly. This is the focus of current work. > > - The i915 driver. This is the graphics driver for Intel GPUs. It > uses KMS and the memory manager functionality. Importing a newer > version will be possible once the underlying parts are done. > > - Wayland is a userland application that sits on top of DRI drivers, > just as X.org does. Most of the things Wayland needs that don’t work > on FreeBSD are not graphics related. > > The problem is that the developers *also* conflate them. Upstream > i915 developers will add KPIs to GEM / TTM / KMS to make their lives > easier and these features need bringing across to FreeBSD.
Let's also not forget the following statistics: - The DRM / GEM / TTM code is around 50k lines of code; - The i915 driver is 120k lines of code; - The radeon driver is 212k lines of code. Even with a good linux compatibility layer, it's still a big project that requires a lot of work. If we don't convince the vendors to work on FreeBSD, I fear this problem will never be solved. P.S.: the total linux drm stack is around 600k LOC. -- Rui Paulo _______________________________________________ firstname.lastname@example.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"