drm_vblank_count_and_time9
Retrieve “cooked” vblank counter value and the system timestamp corresponding to that vblank counter value.
Arguments
dev
DRM device
crtc
which counter to retrieve
vblanktime
Pointer to struct timeval to receive the vblank timestamp.
Overview
Fetches the “cooked” vblank count value that represents the number of vblank events since the system was booted, including lost events due to modesetting activity. Returns corresponding system timestamp of the time of the vblank interval that corresponds to the current vblank counter value.