linux-kernel - Re: [PATCH 2/4] dt-bindings: remoteproc: mediatek: Remove l1tcm for dual-core MT8188 SCP

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Message-ID: <b0872ee008c3c6a2731f949d8c2be77aa49341f7.camel@mediatek.com>
Date: Thu, 20 Mar 2025 01:28:17 +0000
From: Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"robh@...nel.org" <robh@...nel.org>, "andersson@...nel.org"
	<andersson@...nel.org>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	TingHan Shen (沈廷翰) <TingHan.Shen@...iatek.com>,
	"mathieu.poirier@...aro.org" <mathieu.poirier@...aro.org>,
	"matthias.bgg@...il.com" <matthias.bgg@...il.com>, Nicolas Prado
	<nfraprado@...labora.com>, Olivia Wen (温倩苓)
	<Olivia.Wen@...iatek.com>, "conor+dt@...nel.org" <conor+dt@...nel.org>
CC: "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "kernel@...labora.com" <kernel@...labora.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH 2/4] dt-bindings: remoteproc: mediatek: Remove l1tcm for
 dual-core MT8188 SCP

On Wed, 2025-03-19 at 10:34 +0100, AngeloGioacchino Del Regno wrote:
> 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> Il 18/03/25 23:22, Nícolas F. R. A. Prado ha scritto:
> > The SCP present on MT8188 does not have an L1TCM memory region, but
> > the
> > binding incorrectly requires one for the dual-core description of
> > the
> > MT8188 SCP. Remove that requirement. Also update the minimum number
> > of
> > reg and reg-names to 1, since as this is a multi-core SCP with no
> > L1TCM memory, only the CFG memory region is present in the parent
> > node.
> > 
> > Fixes: 91e0d560b9fd ("dt-bindings: remoteproc: mediatek: Support
> > MT8188 dual-core SCP")
> > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> 
> As far as I know, the L1TCM is present on MT8188, and it's at
> 0x1070000 len 0x8000
> exactly like MT8195.
> 
> Moudy, are you able to please confirm or deny that?
> 
> Cheers,
> Angelo
> 
> 

Hi Angelo,

Unfortunately, during the transition from MT8195 to MT8188, the SCP
removed the L1TCM, retaining only the SRAM and config register.
For detailed hardware changes, you can refer to Tinghan's previous
description at the following link.

ref:
https://lore.kernel.org/all/20220715051821.30707-3-tinghan.shen@mediatek.com/

Sincerely,
Moudy Ho