SHOTPLUG_CTL_DDI_HPD_ENABLE
ctl |= SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_A)
| SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_B)
| SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_C)
| SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_D);