From: Krzysztof Kozlowski <krzk@kernel.org>
To: Fei Shao <fshao@chromium.org>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Cc: Bin Liu <bin.liu@mediatek.com>,
Conor Dooley <conor+dt@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh@kernel.org>, Xia Jiang <xia.jiang@mediatek.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-mediatek@lists.infradead.org
Subject: Re: [PATCH v2 3/8] dt-bindings: media: mediatek,jpeg: Relax IOMMU max item count
Date: Wed, 2 Oct 2024 15:59:10 +0200 [thread overview]
Message-ID: <a0bff4b0-53ee-4c72-bc0a-205052cd9985@kernel.org> (raw)
In-Reply-To: <20241001113052.3124869-4-fshao@chromium.org>
On 01/10/2024 13:27, Fei Shao wrote:
> On MediaTek platforms with Multimedia MMU (M4U), a multimedia hardware
> can be assigned with a local arbiter (LARB) which has a maximum of 32
> ports for MediaTek's IOMMU infrastructure. That means there can be at
> most 32 items in the iommus property in theory.
>
> Instead of relaxing the max item count every time a newly introduced
> device tree hits the limit, bump the number to 32 as an one-time effort.
>
> On the other hand, all existing and foreseeable JPEG decoder nodes at
> this point have at least 2 IOMMUs, so set minItems to 2 accordingly.
>
> Signed-off-by: Fei Shao <fshao@chromium.org>
> ---
> It's not in the upstream tree yet, but the upcoming MT8188 DT will have
> 6 IOMMUs in its JPEG decoder. This patch is to pave the way for that.
>
> Changes in v2:
> New patch.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Best regards,
Krzysztof
next prev parent reply other threads:[~2024-10-02 13:59 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-01 11:27 [PATCH v2 0/8] MT8188 DT and binding fixes Fei Shao
2024-10-01 11:27 ` [PATCH v2 1/8] dt-bindings: power: mediatek: Add another nested power-domain layer Fei Shao
2024-12-02 16:07 ` Ulf Hansson
2024-10-01 11:27 ` [PATCH v2 2/8] dt-bindings: PCI: mediatek-gen3: Allow exact number of clocks only Fei Shao
2024-10-01 11:27 ` [PATCH v2 3/8] dt-bindings: media: mediatek,jpeg: Relax IOMMU max item count Fei Shao
2024-10-02 6:16 ` Krzysztof Kozlowski
2024-10-02 11:57 ` Fei Shao
2024-10-02 13:12 ` Matthias Brugger
2024-10-02 14:00 ` Krzysztof Kozlowski
2024-10-02 13:59 ` Krzysztof Kozlowski [this message]
2024-10-01 11:27 ` [PATCH v2 4/8] dt-bindings: media: mediatek,vcodec: Revise description Fei Shao
2024-10-02 6:16 ` Krzysztof Kozlowski
2024-10-01 11:27 ` [PATCH v2 5/8] arm64: dts: mediatek: mt8188: Add missing dma-ranges to soc node Fei Shao
2024-10-01 11:27 ` [PATCH v2 6/8] arm64: dts: mediatek: mt8188: Update vppsys node names to syscon Fei Shao
2024-10-01 11:27 ` [PATCH v2 7/8] arm64: dts: mediatek: mt8188: Move vdec1 power domain under vdec0 Fei Shao
2024-10-01 11:27 ` [PATCH v2 8/8] arm64: dts: mediatek: mt8188: Move SPI NOR *-cells properties Fei Shao
2024-10-02 9:33 ` (subset) [PATCH v2 0/8] MT8188 DT and binding fixes AngeloGioacchino Del Regno
2024-12-02 4:24 ` Chen-Yu Tsai
2024-12-02 16:07 ` Ulf Hansson
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