[PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges

[Arnd Bergmann]

On Wed, Jan 13, 2021 at 4:42 AM Bharat Gooty <bharat.gooty at 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 at 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