[PATCH v5 06/27] dt-bindings: mediatek: Add binding for mt8192 IOMMU

[Krzysztof Kozlowski]

On Wed, Dec 09, 2020 at 04:00:41PM +0800, Yong Wu wrote:
> This patch adds decriptions for mt8192 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.
> 
> mt8192 M4U support 0~16GB iova range. we preassign different engines
> into different iova ranges:
> 
> domain-id  module     iova-range                  larbs
>    0       disp        0 ~ 4G                      larb0/1
>    1       vcodec      4G ~ 8G                     larb4/5/7
>    2       cam/mdp     8G ~ 12G             larb2/9/11/13/14/16/17/18/19/20
>    3       CCU0    0x4000_0000 ~ 0x43ff_ffff     larb13: port 9/10
>    4       CCU1    0x4400_0000 ~ 0x47ff_ffff     larb14: port 4/5
> 
> The iova range for CCU0/1(camera control unit) is HW requirement.
> 
> Signed-off-by: Yong Wu <yong.wu at mediatek.com>
> Reviewed-by: Rob Herring <robh at kernel.org>
> ---
>  .../bindings/iommu/mediatek,iommu.yaml        |  18 +-
>  include/dt-bindings/memory/mt8192-larb-port.h | 240 ++++++++++++++++++
>  2 files changed, 257 insertions(+), 1 deletion(-)
>  create mode 100644 include/dt-bindings/memory/mt8192-larb-port.h
> 

Acked-by: Krzysztof Kozlowski <krzk at kernel.org>

Best regards,
Krzysztof