VLV_PCS23_DW11
vlv_dpio_write(display->drm, phy, VLV_PCS23_DW11(ch), val);
val = vlv_dpio_read(display->drm, phy, VLV_PCS23_DW11(ch));
vlv_dpio_write(display->drm, phy, VLV_PCS23_DW11(ch), val);
val = vlv_dpio_read(display->drm, phy, VLV_PCS23_DW11(ch));