media: dt-bindings: add rockchip rk3568 vicap

Add documentation for the Rockchip RK3568 Video Capture (VICAP) unit.

Signed-off-by: Michael Riesch <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Bryan O'Donoghue <[e-mail]>
Signed-off-by: Michael Riesch <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

Documentation/devicetree/bindings/media/rockchip,rk3568-vicap.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/rockchip,rk3568-vicap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3568 Video Capture (VICAP)
+
+maintainers:
+  - Michael Riesch <[e-mail]>
+
+description:
+  The Rockchip RK3568 Video Capture (VICAP) block features a digital video
+  port (DVP, a parallel video interface) and a MIPI CSI-2 port. It receives
+  the data from camera sensors, video decoders, or other companion ICs and
+  transfers it into system main memory by AXI bus.
+
+properties:
+  compatible:
+    const: rockchip,rk3568-vicap
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: ACLK
+      - description: HCLK
+      - description: DCLK
+      - description: ICLK
+
+  clock-names:
+    items:
+      - const: aclk
+      - const: hclk
+      - const: dclk
+      - const: iclk
+
+  iommus:
+    maxItems: 1
+
+  resets:
+    items:
+      - description: ARST
+      - description: HRST
+      - description: DRST
+      - description: PRST
+      - description: IRST
+
+  reset-names:
+    items:
+      - const: arst
+      - const: hrst
+      - const: drst
+      - const: prst
+      - const: irst
+
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to general register file used for video input block control.
+
+  power-domains:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: The digital video port (DVP, a parallel video interface).
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              bus-type:
+                enum:
+                  - 5 # MEDIA_BUS_TYPE_PARALLEL
+                  - 6 # MEDIA_BUS_TYPE_BT656
+
+              rockchip,dvp-clk-delay:
+                $ref: /schemas/types.yaml#/definitions/uint32
+                default: 0
+                minimum: 0
+                maximum: 127
+                description:
+                  Delay the DVP path clock input to align the sampling phase,
+                  only valid in dual edge sampling mode. Delay is zero by
+                  default and can be adjusted optionally.
+
+            required:
+              - bus-type
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Port connected to the MIPI CSI-2 receiver output.
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3568-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/power/rk3568-power.h>
+    #include <dt-bindings/media/video-interfaces.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        vicap: video-capture@fdfe0000 {
+            compatible = "rockchip,rk3568-vicap";
+            reg = <0x0 0xfdfe0000 0x0 0x200>;
+            interrupts = <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>;
+            assigned-clocks = <&cru DCLK_VICAP>;
+            assigned-clock-rates = <300000000>;
+            clocks = <&cru ACLK_VICAP>, <&cru HCLK_VICAP>,
+                     <&cru DCLK_VICAP>, <&cru ICLK_VICAP_G>;
+            clock-names = "aclk", "hclk", "dclk", "iclk";
+            iommus = <&vicap_mmu>;
+            power-domains = <&power RK3568_PD_VI>;
+            resets = <&cru SRST_A_VICAP>, <&cru SRST_H_VICAP>,
+                     <&cru SRST_D_VICAP>, <&cru SRST_P_VICAP>,
+                     <&cru SRST_I_VICAP>;
+            reset-names = "arst", "hrst", "drst", "prst", "irst";
+            rockchip,grf = <&grf>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                vicap_dvp: port@0 {
+                    reg = <0>;
+
+                    vicap_dvp_input: endpoint {
+                        bus-type = <MEDIA_BUS_TYPE_BT656>;
+                        bus-width = <16>;
+                        pclk-sample = <MEDIA_PCLK_SAMPLE_DUAL_EDGE>;
+                        remote-endpoint = <&it6801_output>;
+                    };
+                };
+
+                vicap_mipi: port@1 {
+                    reg = <1>;
+
+                    vicap_mipi_input: endpoint {
+                        remote-endpoint = <&csi_output>;
+                    };
+                };
+            };
+        };
+    };

MAINTAINERS

···
 S:	Maintained
 F:	Documentation/admin-guide/media/rkcif*
 F:	Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
+F:	Documentation/devicetree/bindings/media/rockchip,rk3568-vicap.yaml
 
 ROCKCHIP CRYPTO DRIVERS
 M:	Corentin Labbe <[e-mail]>