On 1/13/21 12:05 AM, Arnd Bergmann wrote: > On Wed, Jan 13, 2021 at 4:42 AM Bharat Gooty <bharat.gooty@xxxxxxxxxxxx> wrote: >> >> Hello Ray, >> >> I had cross checked with Design and integration team. >> Yes we can set the "dma-rages" to 40 bit DMA ranges. Tested, it is working. >> >> -----Original Message----- >> From: Ray Jui <ray.jui@xxxxxxxxxxxx> >> >> Bharat can correct me if I'm wrong, but I don't think we have a bug in >> the USB DMA engine that causes it can only address 32-bit. I believe we >> can set dma-ranges size to 40-bit here. >> >> The dma-range property is though required to be specified, instead of >> leaving it as empty, with the use of IOMMU. That seems to be a v5.10 >> specific behavior as I described below. > > Ok, thanks for double-checking. I had misremembered the version > that actually went into the as the one that used 64-bit dma-ranges > and thought that was what broke, rather than the version without > dma-ranges. > > If any of you want to send me that bugfix directly, or have Florian > pick it up through his fixes branch, I'll make sure we get it into v5.11. I have another change for v5.11 that I would like to send, so please do send a bugfix when you get a chance and we can lump those two changes together, say, by the end of the week? -- Florian
