Hi Rainer, On 17 June 2016 at 22:00, Rainer Hochecker <fernetmenta@xxxxxxx> wrote: > I agree. GLX_OML_sync_control fulfils all our requirements apart from being > available for EGL. It would be great to have it available for EGL. In regard > to Wayland this is really important. For the time being Kodi stopped > supporting Wayland because a/v sync is not possible on that platform. This isn't true. For Wayland, you can use the wp_presentation_time extension: https://cgit.freedesktop.org/wayland/wayland-protocols/tree/stable/presentation-time/presentation-time.xml If you're using the zwp_linux_dmabuf extension directly, then you can easily and obviously use the extension to get feedback, and there are examples of using this. But even if you're using EGL, Wayland's EGL client platform has the property that a wl_surface::commit request must be issued from inside eglSwapBuffers. So you can make use of this to issue a presentation_time feedback request immediately before calling eglSwapBuffers, which will return a unique event giving you the exact time that the buffer swap was actually displayed on screen. This is far better than vblank requests which only give you hardware clock ticks, and tell you nothing about actual display time. I do discuss this with Peter occasionally, but please get in touch if you feel there is anything else missing, because we have gone to great lengths to make Wayland as good as it possibly can be for exactly these usecases. Cheers, Daniel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
