linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: add apq8096sg-db820c, AP8096SG variant of DB820c

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Message-ID: <d5fc8900-e720-4f5c-b456-67c4ae03f711@oss.qualcomm.com>
Date: Mon, 17 Nov 2025 12:54:22 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: add apq8096sg-db820c, AP8096SG
 variant of DB820c

On 11/15/25 1:09 AM, Dmitry Baryshkov wrote:
> On Fri, 14 Nov 2025 at 23:31, Konrad Dybcio
> <konrad.dybcio@....qualcomm.com> wrote:
>>
>> On 11/13/25 9:32 PM, Dmitry Baryshkov wrote:
>>> On Wed, Nov 12, 2025 at 10:44:49AM +0100, Konrad Dybcio wrote:
>>>> On 11/11/25 5:02 PM, Dmitry Baryshkov wrote:
>>>>> There has been a (rare) varint of Dragonboard 820c, utilizing Pro
>>>>> version of the SoC, with the major difference being CPU and GPU clock
>>>>> tables. Add a DT file representing this version of the board.
>>>>
>>>> So is the conclusion that both flavors were used?
>>>
>>> Yes. I have had a production unit with a non-SG flavour. Bjorn's lab
>>> has a standard one too. All units in Collabora lab are Pro ones.
>>
>> Pro doesn't necessarily have to == SG, this seems to be sort of
> 
> My understanding was that APQ8096SG is modem-less MSM8996Pro.
> 
>> a "MSM8996Pro" and "QCM8996Pro" situation.
> 
>> I'm hoping that speedbin
>> fuse values don't have different meanings for mobilePro and SG
> 
> At least downstream doesn't have separate bins for APQ versions.

arch/arm64/boot/dts/qcom/msm8996pro.dtsi:       qcom,msm-id = <305 0x10000>;
arch/arm64/boot/dts/qcom/msm8996pro-v1.1.dtsi:  qcom,msm-id = <305 0x10001>;

this is interesting, perhaps Pro==SG then

I also found evidence that there exist allOf

(MSM/APQ)(Pro/not)(Auto/not)

in the form of:

msm-id | sku
246 mobile
291 apq
305 msm-pro
310 msm-auto
311 apq-auto
312 apq-pro
315 msm-pro-auto
316 apq-pro-auto

and apparently upstream dt-bindings also defines 302/MSM8996L(ite?)

Konrad