media: dt-bindings: add rockchip mipi csi-2 receiver

Add documentation for the Rockchip MIPI CSI-2 Receiver.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Michael Riesch <michael.riesch@collabora.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi2.yaml

@@ -0,0 +1,141 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/rockchip,rk3568-mipi-csi2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip MIPI CSI-2 Receiver
+
+maintainers:
+  - Michael Riesch <michael.riesch@collabora.com>
+
+description:
+  The Rockchip MIPI CSI-2 Receiver is a CSI-2 bridge with one input port and
+  one output port. It receives the data with the help of an external MIPI PHY
+  (C-PHY or D-PHY) and passes it to the Rockchip Video Capture (VICAP) block.
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3568-mipi-csi2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: Interrupt that signals changes in CSI2HOST_ERR1.
+      - description: Interrupt that signals changes in CSI2HOST_ERR2.
+
+  interrupt-names:
+    items:
+      - const: err1
+      - const: err2
+
+  clocks:
+    maxItems: 1
+
+  phys:
+    maxItems: 1
+    description: MIPI C-PHY or D-PHY.
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: Input port node. Connect to e.g., a MIPI CSI-2 image sensor.
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              bus-type:
+                enum:
+                  - 1 # MEDIA_BUS_TYPE_CSI2_CPHY
+                  - 4 # MEDIA_BUS_TYPE_CSI2_DPHY
+
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+
+            required:
+              - bus-type
+              - data-lanes
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Output port connected to a Rockchip VICAP port.
+
+    required:
+      - port@0
+      - port@1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - phys
+  - ports
+  - power-domains
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3568-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/media/video-interfaces.h>
+    #include <dt-bindings/power/rk3568-power.h>
+
+    soc {
+        interrupt-parent = <&gic>;
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        csi: csi@fdfb0000 {
+            compatible = "rockchip,rk3568-mipi-csi2";
+            reg = <0x0 0xfdfb0000 0x0 0x10000>;
+            interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "err1", "err2";
+            clocks = <&cru PCLK_CSI2HOST1>;
+            phys = <&csi_dphy>;
+            power-domains = <&power RK3568_PD_VI>;
+            resets = <&cru SRST_P_CSI2HOST1>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                csi_in: port@0 {
+                    reg = <0>;
+
+                    csi_input: endpoint {
+                        bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
+                        data-lanes = <1 2 3 4>;
+                        remote-endpoint = <&imx415_output>;
+                    };
+                };
+
+                csi_out: port@1 {
+                    reg = <1>;
+
+                    csi_output: endpoint {
+                        remote-endpoint = <&vicap_mipi_input>;
+                    };
+                };
+            };
+        };
+    };

MAINTAINERS

@@ -25364,6 +25364,12 @@ S:	Maintained
 F:	drivers/i2c/busses/i2c-designware-amdisp.c
 F:	include/linux/soc/amd/isp4_misc.h
 
+SYNOPSYS DESIGNWARE MIPI CSI-2 RECEIVER DRIVER
+M:	Michael Riesch <michael.riesch@collabora.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi2.yaml
+
 SYNOPSYS DESIGNWARE MMC/SD/SDIO DRIVER
 M:	Jaehoon Chung <jh80.chung@samsung.com>
 M:	Shawn Lin <shawn.lin@rock-chips.com>