PORT_DFT2_G4X
u32 tmp = intel_de_read(display, PORT_DFT2_G4X(display));
intel_de_write(display, PORT_DFT2_G4X(display), tmp);
u32 tmp = intel_de_read(display, PORT_DFT2_G4X(display));
intel_de_write(display, PORT_DFT2_G4X(display), tmp);