From 69d3d14320107c9c1858e45df3dcf35ff4426489 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 29 Oct 2010 21:44:37 +0100
Subject: [PATCH] --- yaml --- r: 228675 b: refs/heads/master c:
 6aa56062eaba67adfb247cded244fd877329588d h: refs/heads/master i:   228673:
 12ca1b296c746f32d348d187dd027343f6fd87b5   228671:
 b95ec6d6767a805dcdca37aab2526a6cb053b981 v: v3

---
 [refs]                                        |  2 +-
 trunk/drivers/gpu/drm/i915/intel_ringbuffer.c | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 039c6806aef0..a7914b06a880 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f4e0b29bf23687ac16dc476bd90cd4d8b0eacd5c
+refs/heads/master: 6aa56062eaba67adfb247cded244fd877329588d
diff --git a/trunk/drivers/gpu/drm/i915/intel_ringbuffer.c b/trunk/drivers/gpu/drm/i915/intel_ringbuffer.c
index 2e72d3a0740f..390aa21edbe4 100644
--- a/trunk/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/trunk/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -174,7 +174,7 @@ static int init_ring_common(struct intel_ring_buffer *ring)
 
 	I915_WRITE_CTL(ring,
 			((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
-			| RING_NO_REPORT | RING_VALID);
+			| RING_REPORT_64K | RING_VALID);
 
 	/* If the head is still not zero, the ring is dead */
 	if ((I915_READ_CTL(ring) & RING_VALID) == 0 ||
@@ -691,6 +691,17 @@ int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
 	struct drm_device *dev = ring->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	unsigned long end;
+	u32 head;
+
+	head = intel_read_status_page(ring, 4);
+	if (head) {
+		ring->head = head & HEAD_ADDR;
+		ring->space = ring->head - (ring->tail + 8);
+		if (ring->space < 0)
+			ring->space += ring->size;
+		if (ring->space >= n)
+			return 0;
+	}
 
 	trace_i915_ring_wait_begin (dev);
 	end = jiffies + 3 * HZ;