[PATCH v11 05/17] media: dt-bindings: add rockchip rk3568 mipi csi-2 receiver

[Michael Riesch]

Hi Rob,

Thanks for your review.

On 9/22/25 19:11, Rob Herring wrote:
> On Wed, Sep 17, 2025 at 05:38:45PM +0200, Michael Riesch wrote:
>> Add documentation for the Rockchip RK3568 MIPI CSI-2 Receiver.
>>
>> Signed-off-by: Michael Riesch <michael.riesch at wolfvision.net>
>> Reviewed-by: Bryan O'Donoghue <bod at kernel.org>
>> Signed-off-by: Michael Riesch <michael.riesch at collabora.com>
>> ---
>>  .../bindings/media/rockchip,rk3568-mipi-csi.yaml   | 144 +++++++++++++++++++++
>>  MAINTAINERS                                        |   6 +
>>  2 files changed, 150 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi.yaml b/Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi.yaml
>> new file mode 100644
>> index 000000000000..8cbab93b4b85
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi.yaml
>> @@ -0,0 +1,144 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/rockchip,rk3568-mipi-csi.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Rockchip RK3568 MIPI CSI-2 Receiver
>> +
>> +maintainers:
>> +  - Michael Riesch <michael.riesch at collabora.com>
>> +
>> +description:
>> +  The Rockchip RK3568 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 RK3568 Video Capture
>> +  (VICAP) block.
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - items:
>> +          - enum:
>> +              - rockchip,rk3588-mipi-csi
>> +          - const: rockchip,rk3568-mipi-csi
>> +      - const: rockchip,rk3568-mipi-csi
>> +
>> +  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: irq1
>> +      - const: irq2
> 
> Names that are just the index are not useful. Drop. With that,

I would be OK with that, but in the discussion of my recent CSI DPHY
series I was asked to give names to two resets in order to be future
proof (right now all these resets are (de)asserted in unison and this
would be perfectly possible without reset names). Going back to the
issue raised here, I would say that the names need to be there as well
(simply for reasons of consistency).

Maybe we can fix the naming here. One IRQ fires when the ERR1 status
register changes, so maybe irq_err1 ? Other suggestions welcome.

Best regards,
Michael

> 
> Reviewed-by: Rob Herring (Arm) <robh at kernel.org>
> 
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  phys:
>> +    maxItems: 1
>> +    description: MIPI C-PHY or D-PHY.
>> +
>> +  ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
>> +
>> +    properties:
>> +      port at 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, 4]
>> +
>> +              data-lanes:
>> +                minItems: 1
>> +                maxItems: 4
>> +
>> +            required:
>> +              - bus-type
>> +              - data-lanes
>> +
>> +      port at 1:
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +        description: Output port connected to a RK3568 VICAP port.
>> +
>> +    required:
>> +      - port at 0
>> +      - port at 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 at fdfb0000 {
>> +            compatible = "rockchip,rk3568-mipi-csi";
>> +            reg = <0x0 0xfdfb0000 0x0 0x10000>;
>> +            interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
>> +                         <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
>> +            interrupt-names = "irq1", "irq2";
>> +            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 at 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 at 1 {
>> +                    reg = <1>;
>> +
>> +                    csi_output: endpoint {
>> +                        remote-endpoint = <&vicap_mipi_input>;
>> +                    };
>> +                };
>> +            };
>> +        };
>> +    };
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 4c39b9fd80bb..2ac4b7a5b255 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -21797,6 +21797,12 @@ F:	Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst
>>  F:	drivers/media/platform/rockchip/rkisp1
>>  F:	include/uapi/linux/rkisp1-config.h
>>  
>> +ROCKCHIP MIPI CSI-2 RECEIVER DRIVER
>> +M:	Michael Riesch <michael.riesch at collabora.com>
>> +L:	linux-media at vger.kernel.org
>> +S:	Maintained
>> +F:	Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi.yaml
>> +
>>  ROCKCHIP RK3568 RANDOM NUMBER GENERATOR SUPPORT
>>  M:	Daniel Golle <daniel at makrotopia.org>
>>  M:	Aurelien Jarno <aurelien at aurel32.net>
>>
>> -- 
>> 2.39.5
>>