linux-kernel - Re: [PATCH v7 00/12] Clean up "mediatek,larb"

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Message-ID: <271b63107031f6bfa1b746e70ccdcee6d86db8b7.camel@mediatek.com>
Date:   Tue, 31 Aug 2021 10:45:02 +0000
From:   Yong Wu (吴勇) <Yong.Wu@...iatek.com>
To:     "matthias.bgg@...il.com" <matthias.bgg@...il.com>
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Subject: Re: [PATCH v7 00/12] Clean up "mediatek,larb"

Hi Matthias,

Just ping for this patchset.

Thanks.

On Fri, 2021-07-30 at 10:52 +0800, Yong Wu wrote:
> MediaTek IOMMU block diagram always like below:
> 
>         M4U
>          |
>     smi-common
>          |
>   -------------
>   |         |  ...
>   |         |
> larb1     larb2
>   |         |
> vdec       venc
> 
> All the consumer connect with smi-larb, then connect with smi-common.
> 
> When the consumer works, it should enable the smi-larb's power which
> also
> need enable the smi-common's power firstly.
> 
> Thus, Firstly, use the device link connect the consumer and the
> smi-larbs. then add device link between the smi-larb and smi-common.
> 
> After adding the device_link, then "mediatek,larb" property can be
> removed.
> the iommu consumer don't need call the mtk_smi_larb_get/put to enable
> the power and clock of smi-larb and smi-common.
> 
> Base on v5.14-rc1, and a jpeg[1] and mdp[2] patchset.
> 
> [1] 
> https://lore.kernel.org/linux-mediatek/20210702102304.3346429-1-hsinyi@chromium.org/
> [2] 
> https://lore.kernel.org/linux-mediatek/20210709022324.1607884-1-eizan@chromium.org/
> 
> Change notes:
> v7: 1) Fix a arm32 boot fail issue. reported from Frank.
>     2) Add a return fail in the mtk drm. suggested by Dafna.