[v6, 1/5] media: dt-bindings: mt8183: Added camera ISP Pass 1

[Jungo Lin <jungo.lin@mediatek.com>]

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.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jungo Lin <jungo.lin@mediatek.com>
---
Changes from v6:
 - Add port node description in the dt-binding document.
---
 .../bindings/media/mediatek,camisp.txt        | 83 +++++++++++++++++++
 1 file changed, 83 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..a85f37c0b87d
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/mediatek,camisp.txt
@@ -0,0 +1,83 @@
+* 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: Physical base address of the camera function block register and
+  length of memory mapped region. Must contain an entry for each entry
+  in reg-names.
+- reg-names: Must include the following entries:
+  "cam_sys": Camera base function block
+  "cam_uni": Camera UNI function block
+  "cam_a": Camera ISP P1 hardware unit A
+  "cam_b": Camera ISP P1 hardware unit B
+  "cam_c": Camera ISP P1 hardware unit C
+- interrupts: Must contain an entry for each entry in interrupt-names.
+- interrupt-names : Must include the following entries:
+  "cam_uni": Camera UNI interrupt
+  "cam_a": Camera unit A interrupt
+  "cam_b": Camera unit B interrupt
+  "cam_c": Camera unit C interrupt
+- iommus: Shall point to the respective IOMMU block with master port
+  as argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+  for details.
+- clocks: A list of phandle and clock specifier pairs as listed
+  in clock-names property, 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.
+- power-domains: a phandle to the power domain, see
+  Documentation/devicetree/bindings/power/power_domain.txt for details.
+- mediatek,scp: The node of system control processor (SCP), see
+  Documentation/devicetree/bindings/remoteproc/mtk,scp.txt for details.
+- port: child port node corresponding to the data input, in accordance with
+  the video interface bindings defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt. The port
+  node must contain at least one endpoint.
+
+Example:
+SoC specific DT entry:
+
+	camisp: camisp@1a000000 {
+		compatible = "mediatek,mt8183-camisp";
+		reg = <0 0x1a000000 0 0x1000>,
+				<0 0x1a003000 0 0x1000>,
+				<0 0x1a004000 0 0x2000>,
+				<0 0x1a006000 0 0x2000>,
+				<0 0x1a008000 0 0x2000>;
+		reg-names = "cam_sys",
+				"cam_uni",
+				"cam_a",
+				"cam_b",
+				"cam_c";
+		interrupts = <GIC_SPI 253 IRQ_TYPE_LEVEL_LOW>,
+				<GIC_SPI 254 IRQ_TYPE_LEVEL_LOW>,
+				<GIC_SPI 255 IRQ_TYPE_LEVEL_LOW>,
+				<GIC_SPI 256 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "cam_uni",
+				"cam_a",
+				"cam_b",
+				"cam_c";
+		iommus = <&iommu M4U_PORT_CAM_IMGO>;
+		clocks = <&camsys CLK_CAM_CAM>,
+				<&camsys CLK_CAM_CAMTG>;
+		clock-names = "camsys_cam_cgpdn",
+				"camsys_camtg_cgpdn";
+		mediatek,larb = <&larb3>,
+				<&larb6>;
+		power-domains = <&scpsys MT8183_POWER_DOMAIN_CAM>;
+		mediatek,scp = <&scp>;
+
+		port {
+			camisp_endpoint: endpoint {
+				remote-endpoint = <&seninf_camisp_endpoint>;
+			};
+		};
+	};
-- 
2.18.0