Messages in this thread | | | Date | Thu, 23 Jun 2022 10:13:56 +0200 | Subject | Re: DMA-buf and uncached system memory | From | Thomas Zimmermann <> |
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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.
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
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev [unhandled content-type:application/pgp-signature] | |