PF_WIN_POS
intel_de_write_fw(display, PF_WIN_POS(pipe),
intel_de_write_fw(display, PF_WIN_POS(pipe), 0);
pos = intel_de_read(display, PF_WIN_POS(crtc->pipe));
MMIO_D(PF_WIN_POS(PIPE_A));
MMIO_D(PF_WIN_POS(PIPE_B));
MMIO_D(PF_WIN_POS(PIPE_C));