DIGITAL_PORT_HOTPLUG_CNTRL
dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);