Merge tag 'omapdrm-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux...

[karo-tx-linux.git] / drivers / gpu / drm / i915 / intel_ringbuffer.c

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e05a0216cd9b19755a34f711051b8b9c35459b8a..8fcb32a02cb40564bf9f6aab5efb6c4cbe38ad97 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -663,14 +663,15 @@ gen6_add_request(struct intel_ring_buffer *ring)
        struct drm_device *dev = ring->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_ring_buffer *useless;
-       int i, ret;
+       int i, ret, num_dwords = 4;
 
-       ret = intel_ring_begin(ring, ((I915_NUM_RINGS-1) *
-                                     MBOX_UPDATE_DWORDS) +
-                                     4);
+       if (i915_semaphore_is_enabled(dev))
+               num_dwords += ((I915_NUM_RINGS-1) * MBOX_UPDATE_DWORDS);
+#undef MBOX_UPDATE_DWORDS
+
+       ret = intel_ring_begin(ring, num_dwords);
        if (ret)
                return ret;
-#undef MBOX_UPDATE_DWORDS
 
        for_each_ring(useless, dev_priv, i) {
                u32 mbox_reg = ring->signal_mbox[i];
@@ -1606,8 +1607,8 @@ intel_ring_alloc_seqno(struct intel_ring_buffer *ring)
        return i915_gem_get_seqno(ring->dev, &ring->outstanding_lazy_seqno);
 }
 
-static int __intel_ring_begin(struct intel_ring_buffer *ring,
-                             int bytes)
+static int __intel_ring_prepare(struct intel_ring_buffer *ring,
+                               int bytes)
 {
        int ret;
 
@@ -1623,7 +1624,6 @@ static int __intel_ring_begin(struct intel_ring_buffer *ring,
                        return ret;
        }
 
-       ring->space -= bytes;
        return 0;
 }
 
@@ -1638,12 +1638,17 @@ int intel_ring_begin(struct intel_ring_buffer *ring,
        if (ret)
                return ret;
 
+       ret = __intel_ring_prepare(ring, num_dwords * sizeof(uint32_t));
+       if (ret)
+               return ret;
+
        /* Preallocate the olr before touching the ring */
        ret = intel_ring_alloc_seqno(ring);
        if (ret)
                return ret;
 
-       return __intel_ring_begin(ring, num_dwords * sizeof(uint32_t));
+       ring->space -= num_dwords * sizeof(uint32_t);
+       return 0;
 }
 
 void intel_ring_init_seqno(struct intel_ring_buffer *ring, u32 seqno)