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drm/i915: SNB BLT workaround

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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>
This commit is contained in:
Zou Nan hai
2010-11-02 16:31:01 +08:00
committed by Chris Wilson
parent 897ef19251
commit 8d19215be8
2 changed files with 123 additions and 3 deletions
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3
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -55,6 +55,7 @@ struct intel_ring_buffer {
struct drm_i915_gem_execbuffer2 *exec,
struct drm_clip_rect *cliprects,
uint64_t exec_offset);
void (*cleanup)(struct intel_ring_buffer *ring);
/**
* List of objects currently involved in rendering from the
@@ -90,6 +91,8 @@ struct intel_ring_buffer {
wait_queue_head_t irq_queue;
drm_local_map_t map;
void *private;
};
static inline u32