Subject: [RFC,V2,03/11] dt-bindings: mt8183: Added camera ISP Pass 1

From: Jungo Lin <[email-masked]>
Date: Fri, 10 May 2019 09:57:52 +0800

This patch adds DT binding document for the Pass 1 (P1) unit in
Mediatek's camera ISP system. The Pass 1 unit grabs the sensor data
out from the sensor interface, applies ISP image effects from tuning
data and outputs the image data or statistics data to DRAM.

Signed-off-by: Jungo Lin <[email-masked]>
---
 .../bindings/media/mediatek,camisp.txt        | 92 +++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/mediatek,camisp.txt

diff --git a/Documentation/devicetree/bindings/media/mediatek,camisp.txt b/Documentation/devicetree/bindings/media/mediatek,camisp.txt
new file mode 100644
index 000000000000..759e55a5dfac
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/mediatek,camisp.txt
@@ -0,0 +1,92 @@
+* Mediatek Image Signal Processor Pass 1 (ISP P1)
+
+The Pass 1 unit of Mediatek's camera ISP system grabs the sensor data out
+from the sensor interface, applies ISP effects from tuning data and outputs
+the image data and statistics data to DRAM. Furthermore, Pass 1 unit has
+the ability to output two different resolutions frames at the same time to
+increase the performance of the camera application.
+
+Required properties:
+- compatible: Must be "mediatek,mt8183-camisp" for MT8183.
+- reg: Must contain an entry for each entry in reg-names.
+- interrupts: interrupt number to the cpu.
+- iommus: shall point to the respective IOMMU block with master port
+  as argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+  for details.
+- power-domains : a phandle to the power domain of this local arbiter.
+- clocks: device clocks, see
+  Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
+- clock-names: must be "CAMSYS_CAM_CGPDN" and "CAMSYS_CAMTG_CGPDN".
+- mediatek,larb: must contain the local arbiters in the current SOCs, see
+  Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
+  for details.
+- mediatek,scp : the node of system control processor (SCP), see
+  Documentation/devicetree/bindings/remoteproc/mtk,scp.txt for details.
+- memory-region : the reserved shared memory region between Pass 1 unit and
+  system control processor.
+
+Example:
+SoC specific DT entry:
+
+	camisp: camisp@1a000000 {
+		compatible = "mediatek,mt8183-camisp", "syscon";
+		reg = <0 0x1a000000 0 0x1000>,
+		      <0 0x1a003000 0 0x1000>,
+		      <0 0x1a004000 0 0x2000>,
+		      <0 0x1a006000 0 0x2000>;
+		reg-names = "camisp",
+		            "cam1",
+		            "cam2",
+		            "cam3";
+		interrupts = <GIC_SPI 253 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 254 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 255 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "cam1",
+				  "cam2",
+				  "cam3";
+		iommus = <&iommu M4U_PORT_CAM_LSCI0>,
+			 <&iommu M4U_PORT_CAM_LSCI1>,
+			 <&iommu M4U_PORT_CAM_BPCI>;
+		#clock-cells = <1>;
+		power-domains = <&scpsys MT8183_POWER_DOMAIN_CAM>;
+		/* Camera CCF */
+		clocks = <&camsys CLK_CAM_CAM>,
+			 <&camsys CLK_CAM_CAMTG>;
+		clock-names = "CAMSYS_CAM_CGPDN",
+			      "CAMSYS_CAMTG_CGPDN";
+		mediatek,larb = <&larb3>,
+				<&larb6>;
+		mediatek,scp = <&scp>;
+		memory-region = <&cam_mem_reserved>;
+	};
+
+Reserved memory specific DT entry (see reserved memory binding for more
+information):
+
+Example:
+SoC specific DT entry:
+
+	cam_mem_reserved: cam_mem_region {
+		compatible = "mediatek,reserve-memory-cam-smem";
+		no-map;
+		size = <0 0x01400000>; / *20 MB share mem size */
+		alignment = <0 0x1000>;
+		alloc-ranges = <0 0x40000000 0 0x10000000>;
+	};
+
+Mediatek ISP P1 supports a single port node with MIPI-CSI2 bus. It should
+contain one 'port' child node with child 'endpoint' node. Please refer to
+the bindings defined in Documentation/devicetree/bindings/media/video-interfaces.txt
+and Documentation/devicetree/bindings/media/mediatek-seninf.txt.
+
+Example:
+Board specific DT entry:
+
+	&camisp {
+		port@0 {
+			seninf_0: endpoint {
+				remote-endpoint = <&seninf_core>;
+			};
+		};
+	};
+
-- 
2.18.0

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