Re: [PATCH v5 00/11] Adjust the dma-ranges for MTK IOMMU

From: Hans Verkuil <hverkuil@xs4all.nl>
To: Yong Wu <yong.wu@mediatek.com>, Joerg Roedel <joro@8bytes.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Rob Herring <robh+dt@kernel.org>
Cc: Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	nfraprado@collabora.com, linux-media@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux.dev,
	AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@collabora.com>,
	mingyuan.ma@mediatek.com, yf.wang@mediatek.com,
	jianjiao.zeng@mediatek.com,
	Yunfei Dong <yunfei.dong@mediatek.com>,
	kyrie wu <kyrie.wu@mediatek.corp-partner.google.com>,
	chengci.xu@mediatek.com, youlin.pei@mediatek.com,
	anan.sun@mediatek.com
Subject: Re: [PATCH v5 00/11] Adjust the dma-ranges for MTK IOMMU
Date: Tue, 21 Mar 2023 09:54:44 +0100	[thread overview]
Message-ID: <6b368ae8-7c9b-70b6-9858-025743c2bf7f@xs4all.nl> (raw)
In-Reply-To: <20230307023507.13306-1-yong.wu@mediatek.com>

On 07/03/2023 03:34, Yong Wu wrote:
> After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus
> controllers"), the dma-ranges is not allowed for dts leaf node.
> but we still would like to separate the different masters into
> different iova regions. Thus we adjust the internal flow, separate
> the 16GB iova range by the master HW larbid/portid and add the
> dma-ranges property in the parent "soc" node. This also could avoid
> the users forget/abuse the iova regions.
> 
> The commit f1ad5338a4d5 did affect the mt8195 venc, But it is not
> a fatal issue, it could also work well at 0-4GB iova. thus I don't
> add "Fixes:" tag.
> 
> In this series, I add functions for mt8192/mt8195/mt8186, mt8188 will
> be in its special patchset. and the previous mt8173/mt8183...support
> 0-4GB only, no need this function.
> 
> Change note:
> v5: Nothing change. Just rebase on v6.3-rc1.
> 
> v4: https://lore.kernel.org/linux-mediatek/20230215062544.8677-1-yong.wu@mediatek.com/
>     Improve the comment in the code from AngeloGioacchino.
> 
> v3: https://lore.kernel.org/linux-mediatek/20230214031114.926-1-yong.wu@mediatek.com/
>    Add a new patch only for comment more in the code.
> 
> v2: https://lore.kernel.org/linux-mediatek/20230208053643.28249-1-yong.wu@mediatek.com/
>    a) Base on next-20230206 since mt8195 jpeg node is applied which affect
>       this patch.
>    b) Reword the commit message [1/10][2/10] to explain effect.
> 
> v1: https://lore.kernel.org/linux-mediatek/20230113060133.9394-1-yong.wu@mediatek.com/
>    Base on v6.2-rc3.
> 
> Yong Wu (11):
>   dt-bindings: media: mediatek,vcodec: Remove dma-ranges property
>   dt-bindings: media: mediatek,jpeg: Remove dma-ranges property

I assume that these two media bindings patches be pulled in through the iommu subsystem?
Or are they independent and can I take them?

Either is fine with me, I just need to know.

Regards,

	Hans

>   iommu/mediatek: Improve comment for the current region/bank
>   iommu/mediatek: Get regionid from larb/port id
>   iommu/mediatek: mt8192: Add iova_region_larb_msk
>   iommu/mediatek: mt8195: Add iova_region_larb_msk
>   iommu/mediatek: mt8186: Add iova_region_larb_msk
>   iommu/mediatek: Add a gap for the iova regions
>   arm64: dts: mt8195: Add dma-ranges for the parent "soc" node
>   arm64: dts: mt8195: Remove the unnecessary dma-ranges
>   arm64: dts: mt8186: Add dma-ranges for the parent "soc" node
> 
>  .../media/mediatek,mt8195-jpegdec.yaml        |   7 -
>  .../media/mediatek,mt8195-jpegenc.yaml        |   7 -
>  .../media/mediatek,vcodec-decoder.yaml        |   5 -
>  .../media/mediatek,vcodec-encoder.yaml        |   5 -
>  .../media/mediatek,vcodec-subdev-decoder.yaml |   7 -
>  .../bindings/media/mediatek-jpeg-encoder.yaml |   5 -
>  arch/arm64/boot/dts/mediatek/mt8186.dtsi      |   1 +
>  arch/arm64/boot/dts/mediatek/mt8195.dtsi      |   4 +-
>  drivers/iommu/mtk_iommu.c                     | 143 ++++++++++++++----
>  9 files changed, 114 insertions(+), 70 deletions(-)
> 