On Tue, 22 Nov 2022 18:33:59 +0100 Christian König <christian.koenig@xxxxxxx> wrote: > We should have come up with dma-heaps earlier and make it clear that > exporting a DMA-buf from a device gives you something device specific > which might or might not work with others. > > Apart from that I agree, DMA-buf should be capable of handling this. > Question left is what documentation is missing to make it clear how > things are supposed to work? Perhaps somewhat related from Daniel Stone that seems to have been forgotten: https://lore.kernel.org/dri-devel/20210905122742.86029-1-daniels@xxxxxxxxxxxxx/ It aimed mostly at userspace, but sounds to me like the coherency stuff could use a section of its own there? Thanks, pq
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