drm/i915: split out the gen5 ring irq get/put functions

Now that we have sensibly split up, we can nicely get rid of that ugly
is_gen5 check.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -644,6 +644,35 @@ i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
 	POSTING_READ(IMR);
 }
 
+static bool
+gen5_ring_get_irq(struct intel_ring_buffer *ring)
+{
+	struct drm_device *dev = ring->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	if (!dev->irq_enabled)
+		return false;
+
+	spin_lock(&ring->irq_lock);
+	if (ring->irq_refcount++ == 0)
+		ironlake_enable_irq(dev_priv, ring->irq_enable_mask);
+	spin_unlock(&ring->irq_lock);
+
+	return true;
+}
+
+static void
+gen5_ring_put_irq(struct intel_ring_buffer *ring)
+{
+	struct drm_device *dev = ring->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	spin_lock(&ring->irq_lock);
+	if (--ring->irq_refcount == 0)
+		ironlake_disable_irq(dev_priv, ring->irq_enable_mask);
+	spin_unlock(&ring->irq_lock);
+}
+
 static bool
 i9xx_ring_get_irq(struct intel_ring_buffer *ring)
 {
@@ -654,13 +683,8 @@ i9xx_ring_get_irq(struct intel_ring_buffer *ring)
 		return false;
 
 	spin_lock(&ring->irq_lock);
-	if (ring->irq_refcount++ == 0) {
-		if (INTEL_INFO(dev)->gen >= 5)
-			ironlake_enable_irq(dev_priv,
-					    ring->irq_enable_mask);
-		else
-			i915_enable_irq(dev_priv, ring->irq_enable_mask);
-	}
+	if (ring->irq_refcount++ == 0)
+		i915_enable_irq(dev_priv, ring->irq_enable_mask);
 	spin_unlock(&ring->irq_lock);
 
 	return true;
@@ -673,13 +697,8 @@ i9xx_ring_put_irq(struct intel_ring_buffer *ring)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 
 	spin_lock(&ring->irq_lock);
-	if (--ring->irq_refcount == 0) {
-		if (INTEL_INFO(dev)->gen >= 5)
-			ironlake_disable_irq(dev_priv,
-					     ring->irq_enable_mask);
-		else
-			i915_disable_irq(dev_priv, ring->irq_enable_mask);
-	}
+	if (--ring->irq_refcount == 0)
+		i915_disable_irq(dev_priv, ring->irq_enable_mask);
 	spin_unlock(&ring->irq_lock);
 }
 
@@ -1301,8 +1320,8 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 		ring->add_request = pc_render_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = pc_render_get_seqno;
-		ring->irq_get = i9xx_ring_get_irq;
-		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_get = gen5_ring_get_irq;
+		ring->irq_put = gen5_ring_put_irq;
 		ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY;
 	} else {
 		ring->add_request = render_ring_add_request;
@@ -1342,8 +1361,8 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size)
 		ring->add_request = pc_render_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = pc_render_get_seqno;
-		ring->irq_get = i9xx_ring_get_irq;
-		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_get = gen5_ring_get_irq;
+		ring->irq_put = gen5_ring_put_irq;
 		ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY;
 	} else {
 		ring->add_request = render_ring_add_request;
@@ -1418,12 +1437,15 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 		ring->flush = bsd_ring_flush;
 		ring->add_request = ring_add_request;
 		ring->get_seqno = ring_get_seqno;
-		ring->irq_get = i9xx_ring_get_irq;
-		ring->irq_put = i9xx_ring_put_irq;
-		if (IS_GEN5(dev))
+		if (IS_GEN5(dev)) {
 			ring->irq_enable_mask = GT_BSD_USER_INTERRUPT;
-		else
+			ring->irq_get = gen5_ring_get_irq;
+			ring->irq_put = gen5_ring_put_irq;
+		} else {
 			ring->irq_enable_mask = I915_BSD_USER_INTERRUPT;
+			ring->irq_get = i9xx_ring_get_irq;
+			ring->irq_put = i9xx_ring_put_irq;
+		}
 		ring->dispatch_execbuffer = ring_dispatch_execbuffer;
 	}
 	ring->init = init_ring_common;