Symbol: CVT_MIN_VSYNC_BP
drivers/gpu/drm/drm_modes.c
715
#define CVT_MIN_VSYNC_BP 550
drivers/media/v4l2-core/v4l2-dv-timings.c
450
#define CVT_MIN_VSYNC_BP 550 /* min time of vsync + back porch (us) */