Re: [PATCH v4 00/24] MT8192 IOMMU support

[Will Deacon]

On Wed, Nov 11, 2020 at 08:38:14PM +0800, Yong Wu wrote:
> This patch mainly adds support for mt8192 Multimedia IOMMU and SMI.
> 
> mt8192 also is MTK IOMMU gen2 which uses ARM Short-Descriptor translation
> table format. The M4U-SMI HW diagram is as below:
> 
>                           EMI
>                            |
>                           M4U
>                            |
>                       ------------
>                        SMI Common
>                       ------------
>                            |
>   +-------+------+------+----------------------+-------+
>   |       |      |      |       ......         |       |
>   |       |      |      |                      |       |
> larb0   larb1  larb2  larb4     ......      larb19   larb20
> disp0   disp1   mdp    vdec                   IPE      IPE
> 
> All the connections are HW fixed, SW can NOT adjust it.
> 
> Comparing with the preview SoC, this patchset mainly adds two new functions:
> a) add iova 34 bits support.
> b) add multi domains support since several HW has the special iova
> region requirement.
> 
> change note:
> v4: a) rebase on v5.10-rc1
>     b) Move the smi part to a independent patchset.
>     c) Improve v7s code from Robin and Will.
>     d) Add a mediatek iommu entry patch in MAINTAINERS.

Please can you post a v5 of this, adding the Acks from v4 and addressing
the build failures reported by the kbuild robot on patch 20?

Thanks,

Will