timeline: Add GPU timestamp timepoint argument

The purpose of this argument is to hold timestamp information about
events that occurred on the GPU. This argument allows us to include GPU
timestamps in timepoints such as the beginning and end of frame
rendering.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2 files changed