Commits on Feb 23, 2024

1. egl-wayland: implement linux-drm-syncobj-v1 …

   This implements the explicit sync linux-drm-syncobj-v1 protocol for EGL.
   
   Most of this change involves wayland-protocol handling boilerplate. The
   protocol works by allowing the creation of timelines (i.e. DRM syncobjs)
   and per-surface states. We can then specify acquire and release points
   during our surface state configuration which will tell the compositor
   when it can access the buffer or notify us when it is finished accessing
   the buffer.
   
   Sync point signaling takes place during acquire_surface_image. We choose
   our two release point values and send them to the compositor.  In the
   acquire case, the EGLSync will be created first and will be populated
   with a fence representing the GPU work. We can extract its syncfd and
   import it at the acquire point. We choose the release point during
   image acquisition, but don't actually create an EGLSync for it until
   later when the compositor has added a fence to the release point. We
   check if this has taken place after every surface commit.
   
   Separate timelines are used for the acquire and release points. Each
   stream image will have its own timeline, otherwise our signaling of
   acquire points would implicitly signal the still-pending release points.

   

   amshafer committed Feb 23, 2024
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