hpd_pin
#define SHOTPLUG_CTL_DDI_HPD_ENABLE(hpd_pin) (0x8 << (4 * ((hpd_pin) - HPD_PORT_A)))
#define SHOTPLUG_CTL_TC_HPD_ENABLE(hpd_pin) (0x8 << (4 * ((hpd_pin) - HPD_PORT_TC1)))