extern void drm_plane_cleanup(struct drm_plane *plane);
extern unsigned int drm_plane_index(struct drm_plane *plane);
extern void drm_plane_force_disable(struct drm_plane *plane);
+extern void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
+ int *hdisplay, int *vdisplay);
extern int drm_crtc_check_viewport(const struct drm_crtc *crtc,
int x, int y,
const struct drm_display_mode *mode,