ALPM_CTL
intel_de_write(display, ALPM_CTL(display, cpu_transcoder), alpm_ctl);
intel_de_write(display, ALPM_CTL(display, cpu_transcoder), 0);
alpm_ctl = intel_de_read(display, ALPM_CTL(display, cpu_transcoder));
intel_de_rmw(display, ALPM_CTL(display, cpu_transcoder),