drm/i915: Remove use of the autoreported ringbuffer HEAD position

[pandora-kernel.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 933e66b..f6613dc 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -306,7 +306,7 @@ static int init_ring_common(struct intel_ring_buffer *ring)
 
        I915_WRITE_CTL(ring,
                        ((ring->size - PAGE_SIZE) & RING_NR_PAGES)
-                       | RING_REPORT_64K | RING_VALID);
+                       | RING_VALID);
 
        /* If the head is still not zero, the ring is dead */
        if ((I915_READ_CTL(ring) & RING_VALID) == 0 ||
@@ -1157,18 +1157,6 @@ int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
        struct drm_device *dev = ring->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        unsigned long end;
-       u32 head;
-
-       /* If the reported head position has wrapped or hasn't advanced,
-        * fallback to the slow and accurate path.
-        */
-       head = intel_read_status_page(ring, 4);
-       if (head > ring->head) {
-               ring->head = head;
-               ring->space = ring_space(ring);
-               if (ring->space >= n)
-                       return 0;
-       }
 
        trace_i915_ring_wait_begin(ring);
        end = jiffies + 3 * HZ;