Messages in this thread | | | From | Arnd Bergmann <> | Date | Wed, 13 Jan 2021 09:05:22 +0100 | Subject | Re: [PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges |
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On Wed, Jan 13, 2021 at 4:42 AM Bharat Gooty <bharat.gooty@broadcom.com> 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@broadcom.com> > > 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.
Arnd
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