psr_ctl_reg
intel_de_write(display, psr_ctl_reg(display, cpu_transcoder), psr_val);
intel_de_read(display, psr_ctl_reg(display, cpu_transcoder)) & EDP_PSR_ENABLE);
psr_ctl_reg(display, cpu_transcoder));
psr_ctl_reg(display, cpu_transcoder),
val = intel_de_read(display, psr_ctl_reg(display, cpu_transcoder));
intel_de_rmw(display, psr_ctl_reg(display, cpu_transcoder),