diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_request.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index af8c9fa5e066..d06c45305b03 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -771,6 +771,21 @@ err_unlock: } static int +i915_request_await_start(struct i915_request *rq, struct i915_request *signal) +{ + if (list_is_first(&signal->ring_link, &signal->ring->request_list)) + return 0; + + signal = list_prev_entry(signal, ring_link); + if (i915_timeline_sync_is_later(rq->timeline, &signal->fence)) + return 0; + + return i915_sw_fence_await_dma_fence(&rq->submit, + &signal->fence, 0, + I915_FENCE_GFP); +} + +static int emit_semaphore_wait(struct i915_request *to, struct i915_request *from, gfp_t gfp) @@ -788,6 +803,10 @@ emit_semaphore_wait(struct i915_request *to, &from->fence, 0, I915_FENCE_GFP); + err = i915_request_await_start(to, from); + if (err < 0) + return err; + err = i915_sw_fence_await_dma_fence(&to->semaphore, &from->fence, 0, I915_FENCE_GFP); |