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

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Message-ID: <f4fbc949-415b-489e-b333-4c846d3ce8c7@oss.qualcomm.com>
Date: Fri, 14 Nov 2025 22:31:14 +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 11/13/25 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
a "MSM8996Pro" and "QCM8996Pro" situation. I'm hoping that speedbin
fuse values don't have different meanings for mobilePro and SG

>> This product brief
>>
>> https://cdn.lantronix.com/wp-content/uploads/pdf/Open-Q_820_Development_Kit_Quick_Start_Guide.pdf
> 
> This is a totally different board.

Oh right sorry

Konrad