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

[Ray Jui <ray.jui@broadcom.com>]

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Hi Bharat,

On 1/13/2021 8:55 AM, Florian Fainelli wrote:
> On 1/13/21 12:05 AM, Arnd Bergmann wrote:
>> 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.
> 
> 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?
> 

Would you be able to help to send this out by the end of this week as
Florian advised? Your previous patch with the extension to 40-bit in
size plus a fixes-by tag should do!

Thanks!

Ray


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