DPINVGTT
tmp = intel_de_read(display, DPINVGTT);
intel_de_write(display, DPINVGTT, status);
intel_de_write(display, DPINVGTT, enable << 16);
intel_de_write(display, DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
intel_de_write(display, DPINVGTT, DPINVGTT_STATUS_MASK_VLV);
intel_de_write(display, DPINVGTT,
intel_de_write(display, DPINVGTT,