Symbol: DE_PCH_EVENT_IVB
sys/dev/drm/i915/i915_irq.c
2585
if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
sys/dev/drm/i915/i915_irq.c
4049
DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);