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Subject: Re: [PATCH V7 00/11] Support for generic ACPI based PCI host
 controller
To: Gabriele Paoloni <gabriele.paoloni@huawei.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>
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From: Jon Masters <jcm@redhat.com>
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Date: Fri, 20 May 2016 04:24:18 -0400
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On 05/20/2016 04:11 AM, Gabriele Paoloni wrote:
> Hi Ard, Jon

Hi Gabriele :)

> In our case (HiSilicon Hip05/Hip06) we are using the Designware IP
> that unfortunately is non-ECAM for the RC config space.

Yea, I know, and I've pinged them already.

> A possible ACPI table solution was discussed already in this thread
> 
> https://lkml.org/lkml/2016/3/14/722
> 
> where <<Name (_CID, "PNP0C02")  // Motherboard reserved resource>>
> is used to specify an Host Controller specific resource.
> It looks to me that this can be an approach that can accommodate
> different vendors/scenarios and Bjorn seemed to be quite ok with
> it.

Yeah, pondering that. We'll chat with a few others about it.

> It comes without saying that for future HW releases we all should
> make an effort to deliver fully ECAM compliant controllers.

Right. Like I said, a number of designs have been fixed already.

> What's your view about this approach?

Will followup over the weekend.

Jon.

-- 
Computer Architect | Sent from my Fedora powered laptop