linux-kernel - Re: [PATCH v6 7/7] pmdomain: mediatek: Add support for MFlexGraphics

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Message-ID: <CAPaKu7SK=st9FkU+i25MOwBnBPQYpiBxS7-1nnerdBCiPnHy3A@mail.gmail.com>
Date: Fri, 3 Oct 2025 14:42:21 -0700
From: Chia-I Wu <olvaffe@...il.com>
To: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
	Boris Brezillon <boris.brezillon@...labora.com>, Jassi Brar <jassisinghbrar@...il.com>, 
	Chen-Yu Tsai <wenst@...omium.org>, Steven Price <steven.price@....com>, 
	Liviu Dudau <liviu.dudau@....com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Matthias Brugger <matthias.bgg@...il.com>, Kees Cook <kees@...nel.org>, 
	"Gustavo A. R. Silva" <gustavoars@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>, kernel@...labora.com, 
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org, linux-hardening@...r.kernel.org, 
	linux-pm@...r.kernel.org
Subject: Re: [PATCH v6 7/7] pmdomain: mediatek: Add support for MFlexGraphics

On Fri, Oct 3, 2025 at 2:41 PM Chia-I Wu <olvaffe@...il.com> wrote:
>
> On Fri, Oct 3, 2025 at 1:16 PM Nicolas Frattaroli
> <nicolas.frattaroli@...labora.com> wrote:
> >
> > Various MediaTek SoCs use GPU integration silicon named "MFlexGraphics"
> > by MediaTek. On the MT8196 and MT6991 SoCs, interacting with this
> > integration silicon is required to power on the GPU.
> >
> > This glue silicon is in the form of an embedded microcontroller running
> > special-purpose firmware, which autonomously adjusts clocks and
> > regulators.
> >
> > Implement a driver, modelled as a pmdomain driver with a
> > set_performance_state operation, to support these SoCs.
> I like this model a lot. Thanks!
>
> panthor might potentially need to interact with this driver beyond
> what pmdomain provides. I am thinking about querying
> GF_REG_SHADER_PRESENT. Not sure if we've heard back from the vendor.
> Have you considered moving this to drivers/soc/mediatek such that we
> can provide include/linux/mtk-mfg.h to panthor?
I meant to say include/linux/soc/mediatek/mtk-mfg.h.