[Intel-gfx] [PATCH 3/3] drm/i915: peel dma-fence-chains wait fences

[Lionel Landwerlin]

On 03/08/2020 17:08, Chris Wilson wrote:
> Quoting Lionel Landwerlin (2020-08-03 15:01:47)
>> To allow faster engine to engine synchronization, peel the layer of
>> dma-fence-chain to expose potential i915 fences so that the
>> i915-request code can emit HW semaphore wait/signal operations in the
>> ring which is faster than waking up the host to submit unblocked
>> workloads after interrupt notification.
>>
>> v2: Also deal with chains where the last node is not a dma-fence-chain
> This is already done by i915_request_await_dma_fence.
> -Chris
Cool, we can drop this then.

-Lionel