EDP_FORCE_VDD
return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
pp |= EDP_FORCE_VDD;
pp &= ~EDP_FORCE_VDD;
pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
if (pp & EDP_FORCE_VDD)
pp &= ~EDP_FORCE_VDD;
return I915_READ(PP_CONTROL(pipe)) & EDP_FORCE_VDD;