diff options
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drmP.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h index e6d0cd9f518e..748c72907829 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -836,12 +836,17 @@ struct drm_driver { /** * Called by vblank timestamping code. * - * Return the current display scanout position from a crtc. + * Return the current display scanout position from a crtc, and an + * optional accurate ktime_get timestamp of when position was measured. * * \param dev DRM device. * \param crtc Id of the crtc to query. * \param *vpos Target location for current vertical scanout position. * \param *hpos Target location for current horizontal scanout position. + * \param *stime Target location for timestamp taken immediately before + * scanout position query. Can be NULL to skip timestamp. + * \param *etime Target location for timestamp taken immediately after + * scanout position query. Can be NULL to skip timestamp. * * Returns vpos as a positive number while in active scanout area. * Returns vpos as a negative number inside vblank, counting the number @@ -858,7 +863,8 @@ struct drm_driver { * */ int (*get_scanout_position) (struct drm_device *dev, int crtc, - int *vpos, int *hpos); + int *vpos, int *hpos, ktime_t *stime, + ktime_t *etime); /** * Called by \c drm_get_last_vbltimestamp. Should return a precise |