From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
Jassi Brar <jassisinghbrar@gmail.com>,
Chia-I Wu <olvaffe@gmail.com>, Chen-Yu Tsai <wenst@chromium.org>,
Steven Price <steven.price@arm.com>,
Liviu Dudau <liviu.dudau@arm.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: kernel@collabora.com, dri-devel@lists.freedesktop.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
linux-hardening@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH v4 5/8] mailbox: add MediaTek GPUEB IPI mailbox
Date: Wed, 24 Sep 2025 13:35:49 +0200 [thread overview]
Message-ID: <63be9fee-46b4-4bde-8e42-18966981f165@collabora.com> (raw)
In-Reply-To: <20250923-mt8196-gpufreq-v4-5-6cd63ade73d6@collabora.com>
Il 23/09/25 13:39, Nicolas Frattaroli ha scritto:
> The MT8196 SoC uses an embedded MCU to control frequencies and power of
> the GPU. This controller is referred to as "GPUEB".
>
> It communicates to the application processor, among other ways, through
> a mailbox.
>
> The mailbox exposes one interrupt, which appears to only be fired when a
> response is received, rather than a transaction is completed. For us,
> this means we unfortunately need to poll for txdone.
>
> The mailbox also requires the EB clock to be on when touching any of the
> mailbox registers.
>
> Add a simple driver for it based on the common mailbox framework.
>
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
next prev parent reply other threads:[~2025-09-24 11:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-23 11:39 [PATCH v4 0/8] MT8196 GPU Frequency/Power Control Support Nicolas Frattaroli
2025-09-23 11:39 ` [PATCH v4 1/8] dt-bindings: gpu: mali-valhall-csf: add mediatek,mt8196-mali variant Nicolas Frattaroli
2025-09-23 11:39 ` [PATCH v4 2/8] dt-bindings: power: Add MT8196 GPU frequency control binding Nicolas Frattaroli
2025-09-24 11:30 ` AngeloGioacchino Del Regno
2025-09-23 11:39 ` [PATCH v4 3/8] dt-bindings: sram: Add compatible for mediatek,mt8196-gpufreq-sram Nicolas Frattaroli
2025-09-23 11:39 ` [PATCH v4 4/8] dt-bindings: mailbox: Add MT8196 GPUEB Mailbox Nicolas Frattaroli
2025-09-23 14:39 ` Rob Herring (Arm)
2025-09-23 11:39 ` [PATCH v4 5/8] mailbox: add MediaTek GPUEB IPI mailbox Nicolas Frattaroli
2025-09-24 11:35 ` AngeloGioacchino Del Regno [this message]
2025-09-23 11:39 ` [PATCH v4 6/8] drm/panthor: call into devfreq for current frequency Nicolas Frattaroli
2025-09-23 11:40 ` [PATCH v4 7/8] drm/panthor: Use existing OPP table if present Nicolas Frattaroli
2025-09-23 11:40 ` [PATCH v4 8/8] pmdomain: mediatek: Add support for MFlexGraphics Nicolas Frattaroli
2025-09-23 14:24 ` Ulf Hansson
2025-09-25 14:04 ` Nicolas Frattaroli
2025-09-29 9:58 ` Ulf Hansson
2025-09-23 16:25 ` AngeloGioacchino Del Regno
2025-09-24 19:11 ` Nicolas Frattaroli
2025-09-25 13:56 ` AngeloGioacchino Del Regno
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