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author | Yong Wu <yong.wu@mediatek.com> | 2018-05-24 20:35:31 +0800 |
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committer | Matthias Brugger <matthias.bgg@gmail.com> | 2018-07-18 17:01:04 +0200 |
commit | 50fa3cd33f9ddcd870dd367381c514a2ef038444 (patch) | |
tree | 5768c88d221570e86a0351bad8d1c9ef286328b8 /Documentation/devicetree | |
parent | 2b519747ae4859e886c37834d766fe0c7d8d82e2 (diff) | |
download | linux-stable-50fa3cd33f9ddcd870dd367381c514a2ef038444.tar.gz linux-stable-50fa3cd33f9ddcd870dd367381c514a2ef038444.tar.bz2 linux-stable-50fa3cd33f9ddcd870dd367381c514a2ef038444.zip |
dt-bindings: mediatek: Add binding for mt2712 IOMMU and SMI
This patch adds decriptions for mt2712 IOMMU and SMI.
In order to balance the bandwidth, mt2712 has two M4Us, two
smi-commons, 10 smi-larbs. and mt2712 is also MTK IOMMU gen2 which
uses ARM Short-Descriptor translation table format.
The mt2712 M4U-SMI HW diagram is as below:
EMI
|
------------------------------------
| |
M4U0 M4U1
| |
smi-common0 smi-common1
| |
------------------------- --------------------------------
| | | | | | | | | |
| | | | | | | | | |
larb0 larb1 larb2 larb3 larb6 larb4 larb5 larb7 larb8 larb9
disp0 vdec cam venc jpg mdp1/disp1 mdp2/disp2 mdp3 vdo/nr tvd
All the connections are HW fixed, SW can NOT adjust it.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Diffstat (limited to 'Documentation/devicetree')
3 files changed, 11 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt index 53c20cae309f..df5db732138d 100644 --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt @@ -40,6 +40,7 @@ video decode local arbiter, all these ports are according to the video HW. Required properties: - compatible : must be one of the following string: "mediatek,mt2701-m4u" for mt2701 which uses generation one m4u HW. + "mediatek,mt2712-m4u" for mt2712 which uses generation two m4u HW. "mediatek,mt8173-m4u" for mt8173 which uses generation two m4u HW. - reg : m4u register base and size. - interrupts : the interrupt of m4u. @@ -50,8 +51,9 @@ Required properties: according to the local arbiter index, like larb0, larb1, larb2... - iommu-cells : must be 1. This is the mtk_m4u_id according to the HW. Specifies the mtk_m4u_id as defined in - dt-binding/memory/mt2701-larb-port.h for mt2701 and - dt-binding/memory/mt8173-larb-port.h for mt8173 + dt-binding/memory/mt2701-larb-port.h for mt2701, + dt-binding/memory/mt2712-larb-port.h for mt2712, and + dt-binding/memory/mt8173-larb-port.h for mt8173. Example: iommu: iommu@10205000 { diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt index aa614b2d7cab..615abdd0eb0d 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt @@ -2,8 +2,9 @@ SMI (Smart Multimedia Interface) Common The hardware block diagram please check bindings/iommu/mediatek,iommu.txt -Mediatek SMI have two generations of HW architecture, mt8173 uses the second -generation of SMI HW while mt2701 uses the first generation HW of SMI. +Mediatek SMI have two generations of HW architecture, mt2712 and mt8173 use +the second generation of SMI HW while mt2701 uses the first generation HW of +SMI. There's slight differences between the two SMI, for generation 2, the register which control the iommu port is at each larb's register base. But @@ -15,6 +16,7 @@ not needed for SMI generation 2. Required properties: - compatible : must be one of : "mediatek,mt2701-smi-common" + "mediatek,mt2712-smi-common" "mediatek,mt8173-smi-common" - reg : the register and size of the SMI block. - power-domains : a phandle to the power domain of this local arbiter. diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt index ddf46b8856a5..083155cdc2a0 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt @@ -4,8 +4,9 @@ The hardware block diagram please check bindings/iommu/mediatek,iommu.txt Required properties: - compatible : must be one of : - "mediatek,mt8173-smi-larb" "mediatek,mt2701-smi-larb" + "mediatek,mt2712-smi-larb" + "mediatek,mt8173-smi-larb" - reg : the register and size of this local arbiter. - mediatek,smi : a phandle to the smi_common node. - power-domains : a phandle to the power domain of this local arbiter. @@ -15,7 +16,7 @@ Required properties: the register. - "smi" : It's the clock for transfer data and command. -Required property for mt2701: +Required property for mt2701 and mt2712: - mediatek,larb-id :the hardware id of this larb. Example: |