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drm/msm: Let fences read directly from memptrs

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Let dma_fence::signaled, etc, read directly from the address that the hw
is writing with updated completed fence seqno, so we can potentially
notice that the fence is signaled sooner.

Plus add some docs.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20210726144359.2179302-2-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark
2021-07-26 07:43:57 -07:00
parent ff1176468d
commit da3d378dec
3 changed files with 47 additions and 7 deletions
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2
drivers/gpu/drm/msm/msm_ringbuffer.c
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@@ -51,7 +51,7 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
snprintf(name, sizeof(name), "gpu-ring-%d", ring->id);
ring->fctx = msm_fence_context_alloc(gpu->dev, name);
ring->fctx = msm_fence_context_alloc(gpu->dev, &ring->memptrs->fence, name);
return ring;