linux-kernel - Re: [PATCH v2 00/10] Add IOMMU support to MT8365 SoC

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Date:   Wed, 5 Apr 2023 15:54:27 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Alexandre Mergnat <amergnat@...libre.com>,
        Yong Wu <yong.wu@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 00/10] Add IOMMU support to MT8365 SoC

On 05/04/2023 15:13, Alexandre Mergnat wrote:
> 
> On 05/04/2023 13:43, Krzysztof Kozlowski wrote:
>> On 05/04/2023 10:06, Alexandre Mergnat wrote:
>>> This commits are based on the Fabien Parent <fparent@...libre.com> work.
>>>
>>> The purpose of this series is to add the following HWs / IPs support for
>>> the MT8365 SoC:
>>> - System Power Manager
>>> - MultiMedia Memory Management Unit "M4U" (IOMMU)
>>>    - Smart Multimedia Interface "SMI"
>>>      - Local arbiter "LARB"
>>>
>>> This series depends to two others which add power support for MT8365 SoC
>>> [1] [2].
>> So does it mean they cannot be merged? On first glance I do not see the
>> dependency, so I wonder if we understand the dependencies the same. And
>> subsystems.
> Exactly, we shouldn't merge it before the dependent series to don't ]
> break the build due to
> "#include <dt-bindings/power/mediatek,mt8365-power.h>" in the DTSI file.
> Additionally, LARB will not work properly (or at all) without the power 
> support.

And how driver is related to it? If it is, you might have some unusual
coupling between power and memory controller driver.


Best regards,
Krzysztof