TRANS_ENABLE
enabled = !!(val & TRANS_ENABLE);
I915_WRITE(reg, val | TRANS_ENABLE);
val = TRANS_ENABLE;
val &= ~TRANS_ENABLE;
val &= ~TRANS_ENABLE;
if (I915_READ(PCH_TRANSCONF(crtc->pipe)) & TRANS_ENABLE) {
(port == PORT_E) && I915_READ(LPT_TRANSCONF) & TRANS_ENABLE) {