[RFC PATCH V0 3/7] [media] dt-bindings: mt8183: Added DIP-SMEM dt-bindings

[Frederic Chen <frederic.chen@mediatek.com>]

This patch adds the DT binding documentation for the shared memory
between DIP (Digital Image Processing) unit of the camera ISP system
and the co-processor in Mediatek SoCs.

Signed-off-by: Frederic Chen <frederic.chen@mediatek.com>
---
 .../bindings/media/mediatek,dip_smem.txt           | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/mediatek,dip_smem.txt

diff --git a/Documentation/devicetree/bindings/media/mediatek,dip_smem.txt b/Documentation/devicetree/bindings/media/mediatek,dip_smem.txt
new file mode 100644
index 0000000..5533721
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/mediatek,dip_smem.txt
@@ -0,0 +1,29 @@
+Mediatek ISP Shared Memory Device
+
+Mediatek ISP Shared Memory Device is used to manage shared memory
+among CPU, ISP IPs and coprocessor. It is associated with a reserved
+memory region (Please see Documentation\devicetree\bindings\
+reserved-memory\mediatek,reserve-memory-isp_smem.txt) and
+and provide the context to allocate memory with dma addresses.
+
+Required properties:
+- compatible: Should be "mediatek,isp_smem"
+
+- iommus: should point to the respective IOMMU block with master port
+  as argument. Please set the ports which may be accessed
+  through the common path. You can see
+  Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+  for the detail.
+
+- mediatek,larb: must contain the local arbiters in the current Socs.
+  Please set the larb of camsys for Pass 1 and imgsys for DIP, or both
+  if you are using all the camera function. You can see
+  Documentation/devicetree/bindings/memory-controllers/
+  mediatek,smi-larb.txt for the detail.
+
+Example:
+	isp_smem: isp_smem {
+		compatible = "mediatek,isp_smem";
+		mediatek,larb = <&larb5>;
+		iommus = <&iommu M4U_PORT_CAM_IMGI>;
+	};
-- 
1.9.1