VBLANK_START
VBLANK_START(vactive - 1) | VBLANK_END(vtotal - 1));
VBLANK_START(vblank_start - 1) |
VBLANK_START(crtc_vblank_start - 1) |
VBLANK_START(crtc_vblank_start - 1) |
VBLANK_START(480 - 1) | VBLANK_END(525 - 1));