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drm/i915: SNB BLT workaround
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 2 Nov 2010 10:38:58 +0000 (10:38 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 2 Nov 2010 10:48:48 +0000 (10:48 +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.

(cherry picked from commit 8d19215be8254f4f75e9c5a0d28345947b0382db)

Conflicts:

drivers/gpu/drm/i915/intel_ringbuffer.c
drivers/gpu/drm/i915/intel_ringbuffer.h

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

No differences found
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