Messages in this thread | | | Date | Thu, 23 Jun 2022 10:26:45 +0200 | Subject | Re: DMA-buf and uncached system memory | From | Christian König <> |
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Am 23.06.22 um 10:13 schrieb Thomas Zimmermann: > Hi Christian > > Am 15.02.21 um 09:58 schrieb Christian König: >> Hi guys, >> >> we are currently working an Freesync and direct scan out from system >> memory on AMD APUs in A+A laptops. >> >> On problem we stumbled over is that our display hardware needs to >> scan out from uncached system memory and we currently don't have a >> way to communicate that through DMA-buf. >> >> For our specific use case at hand we are going to implement something >> driver specific, but the question is should we have something more >> generic for this? > > I had a patchset here that extends iosys-map (former dma-buf-map) with > caching information. I'll post a copy.
Oh, nice. But why on iosys-map? We need that per DMA-buf.
Thanks, Christian.
> > Sorry for being late to reply. > > Best regards > Thomas > >> >> After all the system memory access pattern is a PCIe extension and as >> such something generic. >> >> Regards, >> Christian. >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel >
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