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drm/i915: implement BSD ring buffer V2

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The BSD (bit stream decoder) ring is used for accessing the BSD engine
which decodes video bitstream for H.264 and VC1 on G45+.  It is
asynchronous with the render ring and has access to separate parts of
the GPU from it, though the render cache is coherent between the two.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Xiang Hai hao <haihao.xiang@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zou Nan hai
2010-05-21 09:08:57 +08:00
committed by Eric Anholt
parent 852835f343
commit d1b851fc0d
6 changed files with 276 additions and 15 deletions
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2
drivers/gpu/drm/i915/i915_dma.c
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@@ -130,6 +130,8 @@ static int i915_dma_cleanup(struct drm_device * dev)
drm_irq_uninstall(dev);
intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
intel_cleanup_ring_buffer(dev, &dev_priv->bsd_ring);
/* Clear the HWS virtual address at teardown */
if (I915_NEED_GFX_HWS(dev))