linux-kernel - Re: [PATCH v9 3/7] iommu/mediatek: Adjust mtk_iommu

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Date:   Fri, 17 Mar 2023 10:34:29 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        iommu@...ts.linux.dev, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, mingyuan.ma@...iatek.com,
        yf.wang@...iatek.com, jianjiao.zeng@...iatek.com,
        chengci.xu@...iatek.com
Subject: Re: [PATCH v9 3/7] iommu/mediatek: Adjust mtk_iommu_config flow

Il 17/03/23 09:55, Yong Wu ha scritto:
> From: "Chengci.Xu" <chengci.xu@...iatek.com>
> 
> If there are many ports in a infra master, current flow will update
> the INFRA register many times. This patch saves all ports to portid_msk
> in the front of mtk_iommu_config(), then update only once for the IOMMU
> configure. After this, we could avoid send too many SMC calls to ATF in
> MT8188.
> 
> Prepare for MT8188, also reduce the indention without functional change.
> 
> Signed-off-by: Chengci.Xu <chengci.xu@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>

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