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authorChris Wilson <chris@chris-wilson.co.uk>2012-04-09 13:59:46 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-04-11 12:14:24 +0200
commit27c1cbd06a7620b354cbb363834f3bb8df4f410d (patch)
tree0c65a9e811897758f568b73ee0466b1f5fa66f19 /drivers/gpu
parent6a562e3daee217ce99fe0e31150acd89a5b22606 (diff)
drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
The 845g shares the errata with i830 whereby executing a command within 2 cachelines of the end of the ringbuffer may cause a GPU hang. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_ringbuffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e25581a9f60f..f75806e5bff5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1038,7 +1038,7 @@ int intel_init_ring_buffer(struct drm_device *dev,
* of the buffer.
*/
ring->effective_size = ring->size;
- if (IS_I830(ring->dev))
+ if (IS_I830(ring->dev) || IS_845G(ring->dev))
ring->effective_size -= 128;
return 0;