linux-kernel - Re: [PATCH 1/3] dt-bindings: remoteproc: mediatek: Add binding for mt8189 scp

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Message-ID: <32cd4a72220e7306b81af6fbf1748add61478467.camel@mediatek.com>
Date: Mon, 4 Aug 2025 10:45:07 +0000
From: Huayu Zong (纵华宇) <Huayu.Zong@...iatek.com>
To: "conor+dt@...nel.org" <conor+dt@...nel.org>, "robh@...nel.org"
	<robh@...nel.org>, "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
	"krzk+dt@...nel.org" <krzk+dt@...nel.org>, "andersson@...nel.org"
	<andersson@...nel.org>, TingHan Shen (沈廷翰)
	<TingHan.Shen@...iatek.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, "mathieu.poirier@...aro.org"
	<mathieu.poirier@...aro.org>
CC: "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, Project_Global_Chrome_Upstream_Group
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH 1/3] dt-bindings: remoteproc: mediatek: Add binding for
 mt8189 scp

On Mon, 2025-08-04 at 11:11 +0200, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> Il 04/08/25 11:10, Huayu Zong (纵华宇) ha scritto:
> > On Mon, 2025-08-04 at 10:27 +0200, AngeloGioacchino Del Regno
> > wrote:
> > > External email : Please do not click links or open attachments
> > > until
> > > you have verified the sender or the content.
> > > 
> > > 
> > > Il 29/07/25 04:31, Huayu Zong ha scritto:
> > > > Add the compatible for mt8189 SCP to the binding.
> > > > 
> > > > Signed-off-by: Huayu Zong <huayu.zong@...iatek.com>
> > > 
> > > Is MT8189's SCP really single-core?
> > > 
> > > All of the new SoCs have two SCP cores - it's a bit strange to
> > > see
> > > that 8189 has
> > > only one... hence, please triple check and confirm.
> > > 
> > > Cheers,
> > > Angelo
> > > 
> > 
> > yes. On the 8189 platform, the architecture design of SCP is a
> > single
> > core.
> > 
> 
> By hardware, or because the firmware uses only one core?
> 
> I'm asking again because this happened multiple times - with MT8195
> and MT8188.
> 
> If this is by hardware:
> 
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> 
> 

MT8189 SCP hardware has only on core, not SW determinate.

On both MT8188 and MT8195 SCP platform, they have two cores. But there
are fewer features running on the 8189 SCP, so its hardware is designed
with just one core.

Thanks.