irq_enable
if (engine->irq_enable) {
engine->irq_enable(engine);
irq_enable(engine);
irq_enable(engine);
irq_enable(engine);
u32 irq_enable;
irq_enable = 0;
irq_enable = GMBUS_IDLE_EN;
I915_WRITE_FW(GMBUS4, irq_enable);
engine->irq_enable = gen8_logical_ring_enable_irq;
engine->irq_enable = gen6_irq_enable;
engine->irq_enable = gen5_irq_enable;
engine->irq_enable = i9xx_irq_enable;
engine->irq_enable = i8xx_irq_enable;
engine->irq_enable = hsw_vebox_irq_enable;
void (*irq_enable)(struct intel_engine_cs *engine);