PF_CTL
intel_de_write_fw(display, PF_CTL(pipe), PF_ENABLE |
intel_de_write_fw(display, PF_CTL(pipe), PF_ENABLE |
intel_de_write_fw(display, PF_CTL(pipe), 0);
ctl = intel_de_read(display, PF_CTL(crtc->pipe));
MMIO_D(PF_CTL(PIPE_A));
MMIO_D(PF_CTL(PIPE_B));
MMIO_D(PF_CTL(PIPE_C));