• Imre Deak's avatar
    drm: add support for monotonic vblank timestamps · c61eef72
    Imre Deak authored
    Jumps in the vblank and page flip event timestamps cause trouble for
    clients, so we should avoid them. The timestamp we get currently with
    gettimeofday can jump, so use instead monotonic timestamps.
    
    For backward compatibility use a module flag to revert back to using
    gettimeofday timestamps. Add also a DRM_CAP_TIMESTAMP_MONOTONIC flag
    that is simply a read only version of the module flag, so that clients
    can query this without depending on sysfs.
    Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
    Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
    c61eef72
drm.h 25.2 KB