linux-hardening - Re: [PATCH v3 04/10] dt-bindings: mailbox: Add MT8196 GPUEB Mailbox

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Message-ID: <fd4be8a5-3600-4de2-ab92-f9c35f12fdc4@collabora.com>
Date: Wed, 17 Sep 2025 14:46:07 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
 Boris Brezillon <boris.brezillon@...labora.com>,
 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>, MyungJoo Ham <myungjoo.ham@...sung.com>,
 Kyungmin Park <kyungmin.park@...sung.com>,
 Chanwoo Choi <cw00.choi@...sung.com>, Jassi Brar <jassisinghbrar@...il.com>,
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>,
 Chia-I Wu <olvaffe@...il.com>, Chen-Yu Tsai <wenst@...omium.org>
Cc: 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-pm@...r.kernel.org, linux-hardening@...r.kernel.org,
 Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v3 04/10] dt-bindings: mailbox: Add MT8196 GPUEB Mailbox

Il 17/09/25 14:22, Nicolas Frattaroli ha scritto:
> The MediaTek MT8196 SoC includes an embedded MCU referred to as "GPUEB",
> acting as glue logic to control power and frequency of the Mali GPU.
> This MCU runs special-purpose firmware for this use, and the main
> application processor communicates with it through a mailbox.
> 
> Add a binding that describes this mailbox.
> 
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
> ---
>   .../mailbox/mediatek,mt8196-gpueb-mbox.yaml        | 64 ++++++++++++++++++++++
>   1 file changed, 64 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..ab5b780cb83a708a3897ca1a440131d97b56c3a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mailbox/mediatek,mt8196-gpueb-mbox.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MFlexGraphics GPUEB Mailbox Controller
> +
> +maintainers:
> +  - Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mediatek,mt8196-gpueb-mbox

Before anyone asks - yes, it is 100% sure that SoCs will be added here sooner or
later.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>