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