DE_PCU_EVENT
if (IS_GEN5(dev_priv) && de_iir & DE_PCU_EVENT)
extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
ilk_enable_display_irq(dev_priv, DE_PCU_EVENT);
I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
I915_WRITE(DEIIR, DE_PCU_EVENT);
I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);