25 Jun
2020
25 Jun
'20
1:18 p.m.
Quoting Lionel Landwerlin (2020-06-25 13:34:43)
There was probably a misunderstand on how the dma-fence-chain is supposed to work or what dma_fence_chain_find_seqno() is supposed to return.
dma_fence_chain_find_seqno() is here to give us the fence to wait upon for a particular point in the timeline. The timeline progresses only when all the points prior to a given number have completed.
Hmm, the question was what point is it supposed to wait for.
For the simple chain of [1, 3], does 1 being signaled imply that all points up to 3 are signaled, or does 3 not being signaled imply that all points after 1 are not. If that's mentioned already somewhere, my bad. If not, could you put the answer somewhere. -Chris