From: Fei Shao <fshao@chromium.org>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
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 19:57:35 +0800 [thread overview]
Message-ID: <CAC=S1nhF7CiiGaNASiqYw4Av7MQfLJsUa1HrYsx9n4D2sAP7Gg@mail.gmail.com> (raw)
In-Reply-To: <r22z7eehmuprvq67gxekqwsah2mcobfsyhn7xzyyh2gdtjegve@zl32uljxrilx>
On Wed, Oct 2, 2024 at 2:16 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On Tue, Oct 01, 2024 at 07:27:21PM +0800, 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.
> >
>
> I do not see any user of this in this patchset.
>
Sorry, I was doing more checks before sending out that series.
The particular patch depending on this is now available as
https://lore.kernel.org/all/20241002114614.847553-6-fshao@chromium.org/
Regards,
Fei
next prev parent reply other threads:[~2024-10-02 11:58 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 [this message]
2024-10-02 13:12 ` Matthias Brugger
2024-10-02 14:00 ` Krzysztof Kozlowski
2024-10-02 13:59 ` Krzysztof Kozlowski
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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