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drm/i915: SNB BLT workaround
authorZou Nan hai <nanhai.zou@intel.com>
Tue, 2 Nov 2010 08:31:01 +0000 (16:31 +0800)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 2 Nov 2010 10:44:23 +0000 (10:44 +0000)
On some stepping of SNB cpu, the first command to be parsed in BLT
command streamer should be MI_BATCHBUFFER_START otherwise the GPU
may hang.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
[ickle: rebased for -next]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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