Re: [PATCH v3 1/4] dt-bindings: media: add i.MX parallel CPI support

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Frank,

On Tue, Jul 08, 2025 at 01:48:42PM -0400, Frank Li via B4 Relay wrote:
> From: Alice Yuan <alice.yuan@nxp.com>
> 
> Document the binding for parallel CPI controller found in i.MX8QXP, i.MX93
> and i.MX91 SoCs.
> 
> Signed-off-by: Alice Yuan <alice.yuan@nxp.com>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> Change in v3:
> - use enum at compatible string
> - add ref to video-interfaces.yaml#
> - use cpi as node name in examples.
> - replace csi (Camera Serial Interface) with CPI (Camera Parallel Interface)
> in commit message.
> 
> Change in v2:
> - use pcif surfix as Laurent Pinchart's suggest.
> - put power-domains into required list
> ---
>  .../devicetree/bindings/media/fsl,imx93-pcif.yaml  | 126 +++++++++++++++++++++
>  MAINTAINERS                                        |   1 +
>  2 files changed, 127 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml b/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..f92e9af371c91636cef42e48573198d4ea5e15f5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
> @@ -0,0 +1,126 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/fsl,imx93-pcif.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: i.MX8/9 Parallel Camera Interface
> +
> +maintainers:
> +  - Frank Li <Frank.Li@nxp.com>
> +
> +description: |
> +  This is device node for the Parallel Camera Interface which enables the
> +  chip to connect directly to external Parallel CMOS image sensors.
> +  Supports up to 80MHz input clock from sensor.
> +  Supports the following input data formats
> +    - 8-bit/10-bit Camera Sensor Interface (CSI)
> +    - 8-bit data port for RGB, YCbCr, and YUV data input
> +    - 8-bit/10-bit data ports for Bayer data input
> +  Parallel Camera Interface is hooked to the Imaging subsystem via the
> +  Pixel Link.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - fsl,imx8qxp-pcif
> +          - fsl,imx93-pcif
> +      - items:
> +          - enum:
> +              - fsl,imx91-pcif
> +          - const: fsl,imx93-pcif
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 2
> +
> +  clock-names:
> +    items:
> +      - const: pixel
> +      - const: ipg
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        unevaluatedProperties: false
> +        description: Input port node.
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              bus-type:
> +                const: 5
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        unevaluatedProperties: false
> +        description: Output port node.
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              bus-type:
> +                const: 5
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx93-clock.h>
> +    #include <dt-bindings/power/fsl,imx93-power.h>
> +
> +    cpi@4ac10070 {
> +        compatible = "fsl,imx93-pcif";
> +        reg = <0x4ac10070 0x10>;
> +        clocks = <&clk IMX93_CLK_MIPI_CSI_GATE>,
> +                 <&clk IMX93_CLK_MEDIA_APB>;
> +        clock-names = "pixel", "ipg";
> +        assigned-clocks = <&clk IMX93_CLK_CAM_PIX>;
> +        assigned-clock-parents = <&clk IMX93_CLK_VIDEO_PLL>;
> +        assigned-clock-rates = <140000000>;
> +        power-domains = <&media_blk_ctrl IMX93_MEDIABLK_PD_MIPI_CSI>;
> +
> +        ports {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            port@0 {
> +                reg = <0>;
> +
> +                endpoint {
> +                    remote-endpoint = <&mt9m114_ep>;
> +                };
> +            };
> +
> +            port@1 {
> +                reg = <1>;
> +                endpoint {
> +                    remote-endpoint = <&isi_in>;
> +                };
> +            };
> +        };
> +    };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 8dc0f6609d1fe2e3eefd50088dbe566d9e107bfa..8ae0667d2bb41fb6a1549bd3b2b33f326cbd1303 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15107,6 +15107,7 @@ L:	linux-media@vger.kernel.org
>  S:	Maintained
>  T:	git git://linuxtv.org/media.git
>  F:	Documentation/admin-guide/media/imx7.rst
> +F:	Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
>  F:	Documentation/devicetree/bindings/media/nxp,imx-mipi-csi2.yaml
>  F:	Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
>  F:	Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml

-- 
Regards,

Laurent Pinchart