linux-kernel - Re: [PATCH 3/6] arm64: dts: mediatek: mt8188: Define CPU big core cluster

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Message-ID: <CAC=S1njehOqkM26o=vfirZ9L8bec0jbtnvH0J2miYR_qEDeSVA@mail.gmail.com>
Date: Thu, 26 Sep 2024 18:41:39 +0800
From: Fei Shao <fshao@...omium.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Matthias Brugger <matthias.bgg@...il.com>, Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 3/6] arm64: dts: mediatek: mt8188: Define CPU big core cluster

On Thu, Sep 26, 2024 at 4:33 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Il 25/09/24 12:57, Fei Shao ha scritto:
> > The MT8188 SoC features two CPU clusters: one with 6 little Cortex-A55
> > cores, and the other with 2 big Cortex-A78 cores.
>
> No, it doesn't. It features only one cluster, so...
>
> >
> > Update the CPU topology to reflect the actual hardware configurations.
>
> ...the actual hardware configuration is already reflected by the currently
> declared CPU topology, so for this commit: NAK.
>
> This SoC uses the ARM DynamIQ technology and embeds both LITTLE and big
> cores in one single cluster.
> Check the MT8188 datasheet for more information :-)

You are absolutely right. I found that description in the datasheet,
and this patch is completely wrong.
Thanks for pointing it out!

Regards,
Fei

>
> Cheers,
> Angelo