diff options
Diffstat (limited to 'include/drm/drm_device.h')
| -rw-r--r-- | include/drm/drm_device.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 7c4fa32f3fc6..16cd3ba3d8d8 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -147,7 +147,13 @@ struct drm_device { * races and imprecision over longer time periods, hence exposing a * hardware vblank counter is always recommended. * - * If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set. + * This is the statically configured device wide maximum. The driver + * can instead choose to use a runtime configurable per-crtc value + * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count + * must be left at zero. See drm_crtc_set_max_vblank_count() on how + * to use the per-crtc value. + * + * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set. */ u32 max_vblank_count; /**< size of vblank counter register */ |