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drm/i915: Simplify calling engine->sync_to

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Since requests can no longer be generated as a side-effect of
intel_ring_begin(), we know that the seqno will be unchanged during
ring-emission. This predicatablity then means we do not have to check
for the seqno wrapping around whilst emitting the semaphore for
engine->sync_to().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469432687-22756-31-git-send-email-chris@chris-wilson.co.uk
Link: http://patchwork.freedesktop.org/patch/msgid/1470174640-18242-22-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2016-08-02 22:50:39 +01:00
parent 5b043f4e60
commit ddf07be7a2
5 changed files with 31 additions and 64 deletions
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5
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -277,9 +277,8 @@ struct intel_engine_cs {
};
/* AKA wait() */
int (*sync_to)(struct drm_i915_gem_request *to_req,
struct intel_engine_cs *from,
u32 seqno);
int (*sync_to)(struct drm_i915_gem_request *to,
struct drm_i915_gem_request *from);
int (*signal)(struct drm_i915_gem_request *signaller_req);
} semaphore;