On Fri, Nov 28, 2014 at 5:48 PM, Thierry Reding <thierry.red...@gmail.com> wrote: > On Fri, Nov 28, 2014 at 02:14:24PM +0900, Alexandre Courbot wrote: >> On 11/28/2014 01:39 AM, Thierry Reding wrote: >> >Tegra K1 and later use a GPU that can be driven by the Nouveau driver. >> >But the GPU is a pure render node and has no display engine, hence the >> >scanout needs to happen on the Tegra display hardware. The GPU and the >> >display engine each have a separate DRM device node exposed by the >> >kernel. >> > >> >To make the setup appear as a single device, this driver instantiates >> >a Nouveau screen with each instance of a Tegra screen and forwards GPU >> >requests to the Nouveau screen. For purposes of scanout it will import >> >buffers created on the GPU into the display driver. Handles that >> >userspace requests are those of the display driver so that they can be >> >used to create framebuffers. >> > >> >This has been tested with some GBM test programs, as well as kmscube and >> >weston. All of those run without modifications, but I'm sure there is a >> >lot that can be improved. >> >> Tested with kmscube and Weston and I can confirm this works. However, EGL >> clients inside Weston have their window filled with garbage (they seem to >> run fine otherwise). Do you also experience this? > > To be honest, that wasn't part of my set of test cases. I had assumed > that since Weston could composite buffers into a final scan out buffer > everything else would just work as well. Do you have any particular > demos that aren't working?
Anything using EGL under Wayland - the simplest case would be weston-simple-egl. glmark2 also displays a broken window, but then crashes shortly after. With weston-simpe-egl I get the framerate feedback and can see the GPU performance counters moving as expected, indicating that the app is rendering correctly but that Weston gets the wrong buffer to display. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
