[v14,1/2] media: dt-bindings: media: xilinx: Add Xilinx MIPI CSI-2 Rx Subsystem

Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.

The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx controller, a
D-PHY in Rx mode and a Video Format Bridge.

Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
v14
- Removed xlnx,csi-pxl-format from required properties
- Added dependency of xlnx,csi-pxl-format on xlnx,vfb
- End the yaml file with ...
- Added Reviewed by Laurent

v13
- Based on Laurent's suggestions
- Fixed the datatypes values as minimum and maximum
- condition added for en-vcx property

v12
- Moved to yaml format
- Update CSI-2 and D-PHY
- Mention that bindings for D-PHY not here
- reset -> video-reset

v11
- Modify compatible string from 4.0 to 5.0

v10
- No changes

v9
- Fix xlnx,vfb description.
- s/Optional/Required endpoint property.
- Move data-lanes description from Ports to endpoint property section.

v8
- Added reset-gpios optional property to assert video_aresetn

v7
- Removed the control name from dt bindings
- Updated the example dt node name to csi2rx

v6
- Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as suggested by Luca
- Added reviewed by Rob Herring

v5
- Incorporated comments by Luca Cersoli
- Removed DPHY clock from description and example
- Removed bayer pattern from device tree MIPI CSI IP
  doesn't deal with bayer pattern.

v4
- Added reviewed by Hyun Kwon

v3
- removed interrupt parent as suggested by Rob
- removed dphy clock
- moved vfb to optional properties
- Added required and optional port properties section
- Added endpoint property section

v2
- updated the compatible string to latest version supported
- removed DPHY related parameters
- added CSI v2.0 related property (including VCX for supporting upto 16
  virtual channels).
- modified csi-pxl-format from string to unsigned int type where the value
  is as per the CSI specification
- Defined port 0 and port 1 as sink and source ports.
- Removed max-lanes property as suggested by Rob and Sakari

 .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237 +++++++++++++++++++++
 1 file changed, 237 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml

Hi Vishal,

Thank you for the patch.

On Wed, May 27, 2020 at 07:27:18PM +0530, Vishal Sagar wrote:
> Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.
> 
> The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx controller, a
> D-PHY in Rx mode and a Video Format Bridge.
> 
> Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
> Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> v14
> - Removed xlnx,csi-pxl-format from required properties
> - Added dependency of xlnx,csi-pxl-format on xlnx,vfb
> - End the yaml file with ...
> - Added Reviewed by Laurent
> 
> v13
> - Based on Laurent's suggestions
> - Fixed the datatypes values as minimum and maximum
> - condition added for en-vcx property
> 
> v12
> - Moved to yaml format
> - Update CSI-2 and D-PHY
> - Mention that bindings for D-PHY not here
> - reset -> video-reset
> 
> v11
> - Modify compatible string from 4.0 to 5.0
> 
> v10
> - No changes
> 
> v9
> - Fix xlnx,vfb description.
> - s/Optional/Required endpoint property.
> - Move data-lanes description from Ports to endpoint property section.
> 
> v8
> - Added reset-gpios optional property to assert video_aresetn
> 
> v7
> - Removed the control name from dt bindings
> - Updated the example dt node name to csi2rx
> 
> v6
> - Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as suggested by Luca
> - Added reviewed by Rob Herring
> 
> v5
> - Incorporated comments by Luca Cersoli
> - Removed DPHY clock from description and example
> - Removed bayer pattern from device tree MIPI CSI IP
>   doesn't deal with bayer pattern.
> 
> v4
> - Added reviewed by Hyun Kwon
> 
> v3
> - removed interrupt parent as suggested by Rob
> - removed dphy clock
> - moved vfb to optional properties
> - Added required and optional port properties section
> - Added endpoint property section
> 
> v2
> - updated the compatible string to latest version supported
> - removed DPHY related parameters
> - added CSI v2.0 related property (including VCX for supporting upto 16
>   virtual channels).
> - modified csi-pxl-format from string to unsigned int type where the value
>   is as per the CSI specification
> - Defined port 0 and port 1 as sink and source ports.
> - Removed max-lanes property as suggested by Rob and Sakari
> 
>  .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237 +++++++++++++++++++++
>  1 file changed, 237 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> new file mode 100644
> index 0000000..2282231
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> @@ -0,0 +1,237 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/xilinx/xlnx,csi2rxss.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx MIPI CSI-2 Receiver Subsystem
> +
> +maintainers:
> +  - Vishal Sagar <vishal.sagar@xilinx.com>
> +
> +description: |
> +  The Xilinx MIPI CSI-2 Receiver Subsystem is used to capture MIPI CSI-2
> +  traffic from compliant camera sensors and send the output as AXI4 Stream
> +  video data for image processing.
> +  The subsystem consists of a MIPI D-PHY in slave mode which captures the
> +  data packets. This is passed along the MIPI CSI-2 Rx IP which extracts the
> +  packet data. The optional Video Format Bridge (VFB) converts this data to
> +  AXI4 Stream video data.
> +  For more details, please refer to PG232 Xilinx MIPI CSI-2 Receiver Subsystem.
> +  Please note that this bindings includes only the MIPI CSI-2 Rx controller
> +  and Video Format Bridge and not D-PHY.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +        - xlnx,mipi-csi2-rx-subsystem-5.0
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    description: List of clock specifiers
> +    items:
> +      - description: AXI Lite clock
> +      - description: Video clock
> +
> +  clock-names:
> +    items:
> +      - const: lite_aclk
> +      - const: video_aclk
> +
> +  xlnx,csi-pxl-format:
> +    description: |
> +      This denotes the CSI Data type selected in hw design.
> +      Packets other than this data type (except for RAW8 and
> +      User defined data types) will be filtered out.
> +      Possible values are as below -
> +      0x1e - YUV4228B
> +      0x1f - YUV42210B
> +      0x20 - RGB444
> +      0x21 - RGB555
> +      0x22 - RGB565
> +      0x23 - RGB666
> +      0x24 - RGB888
> +      0x28 - RAW6
> +      0x29 - RAW7
> +      0x2a - RAW8
> +      0x2b - RAW10
> +      0x2c - RAW12
> +      0x2d - RAW14
> +      0x2e - RAW16
> +      0x2f - RAW20
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32
> +      - anyOf:
> +        - minimum: 0x1e
> +        - maximum: 0x24
> +        - minimum: 0x28
> +        - maximum: 0x2f
> +
> +  xlnx,vfb:
> +    type: boolean
> +    description: Present when Video Format Bridge is enabled in IP configuration
> +
> +  xlnx,en-csi-v2-0:
> +    type: boolean
> +    description: Present if CSI v2 is enabled in IP configuration.
> +
> +  xlnx,en-vcx:
> +    type: boolean
> +    description: |
> +      When present, there are maximum 16 virtual channels, else only 4.
> +
> +  xlnx,en-active-lanes:
> +    type: boolean
> +    description: |
> +      Present if the number of active lanes can be re-configured at
> +      runtime in the Protocol Configuration Register. Otherwise all lanes,
> +      as set in IP configuration, are always active.
> +
> +  video-reset-gpios:
> +    description: Optional specifier for a GPIO that asserts video_aresetn.
> +    maxItems: 1
> +
> +  ports:
> +    type: object
> +
> +    properties:
> +      port@0:
> +        type: object
> +        description: |
> +          Input / sink port node, single endpoint describing the
> +          CSI-2 transmitter.
> +
> +        properties:
> +          reg:
> +            const: 0
> +
> +          endpoint:
> +            type: object
> +
> +            properties:
> +
> +              data-lanes:
> +                description: |
> +                  This is required only in the sink port 0 endpoint which
> +                  connects to MIPI CSI-2 source like sensor.
> +                  The possible values are -
> +                  1       - For 1 lane enabled in IP.
> +                  1 2     - For 2 lanes enabled in IP.
> +                  1 2 3   - For 3 lanes enabled in IP.
> +                  1 2 3 4 - For 4 lanes enabled in IP.
> +                items:
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +                  - const: 4
> +
> +              remote-endpoint: true
> +
> +            required:
> +              - data-lanes
> +              - remote-endpoint
> +
> +            additionalProperties: false
> +
> +        additionalProperties: false
> +
> +      port@1:
> +        type: object
> +        description: |
> +          Output / source port node, endpoint describing modules
> +          connected the CSI-2 receiver.
> +
> +        properties:
> +
> +          reg:
> +            const: 1
> +
> +          endpoint:
> +            type: object
> +
> +            properties:
> +
> +              remote-endpoint: true
> +
> +            required:
> +              - remote-endpoint
> +
> +            additionalProperties: false
> +
> +        additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - ports
> +
> +allOf:
> +  - if:
> +    required:
> +      - xlnx,vfb
> +    then:
> +      required:
> +        - xlnx,csi-pxl-format
> +    else:
> +      properties:
> +        xlnx,csi-pxl-format: false
> +
> +  - if:
> +    not:
> +      required:
> +        - xlnx,en-csi-v2-0
> +    then:
> +      properties:
> +        xlnx,en-vcx: false

There's an indentation problem here, it should be

allOf:
  - if:
      required:
        - xlnx,vfb
    then:
      required:
        - xlnx,csi-pxl-format
    else:
      properties:
        xlnx,csi-pxl-format: false

  - if:
      not:
        required:
          - xlnx,en-csi-v2-0
    then:
      properties:
        xlnx,en-vcx: false

Have you run the bindings checks ?

make DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml dt_binding_check

It would have caught the issue.

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    xcsi2rxss_1: csi2rx@a0020000 {
> +        compatible = "xlnx,mipi-csi2-rx-subsystem-5.0";
> +        reg = <0x0 0xa0020000 0x0 0x10000>;

I think I mentioned in a previous review that this should be

        reg = <0xa0020000 0x10000>;

even if it doesn't match what the real values, as dt_binding_check
compiles the examples in the context of a bus that has #address-cells =
<1> and #size-cells = <1>.

I can fix these when applying the patches to my tree if that's OK with
you, and send a pull request.

> +        interrupt-parent = <&gic>;
> +        interrupts = <0 95 4>;
> +        xlnx,csi-pxl-format = <0x2a>;
> +        xlnx,vfb;
> +        xlnx,en-active-lanes;
> +        xlnx,en-csi-v2-0;
> +        xlnx,en-vcx;
> +        clock-names = "lite_aclk", "video_aclk";
> +        clocks = <&misc_clk_0>, <&misc_clk_1>;
> +        video-reset-gpios = <&gpio 86 GPIO_ACTIVE_LOW>;
> +
> +        ports {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            port@0 {
> +                /* Sink port */
> +                reg = <0>;
> +                csiss_in: endpoint {
> +                    data-lanes = <1 2 3 4>;
> +                    /* MIPI CSI-2 Camera handle */
> +                    remote-endpoint = <&camera_out>;
> +                };
> +            };
> +            port@1 {
> +                /* Source port */
> +                reg = <1>;
> +                csiss_out: endpoint {
> +                    remote-endpoint = <&vproc_in>;
> +                };
> +            };
> +        };
> +    };
> +...

On Wed, 27 May 2020 19:27:18 +0530, Vishal Sagar wrote:
> Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.
> 
> The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx controller, a
> D-PHY in Rx mode and a Video Format Bridge.
> 
> Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
> Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> v14
> - Removed xlnx,csi-pxl-format from required properties
> - Added dependency of xlnx,csi-pxl-format on xlnx,vfb
> - End the yaml file with ...
> - Added Reviewed by Laurent
> 
> v13
> - Based on Laurent's suggestions
> - Fixed the datatypes values as minimum and maximum
> - condition added for en-vcx property
> 
> v12
> - Moved to yaml format
> - Update CSI-2 and D-PHY
> - Mention that bindings for D-PHY not here
> - reset -> video-reset
> 
> v11
> - Modify compatible string from 4.0 to 5.0
> 
> v10
> - No changes
> 
> v9
> - Fix xlnx,vfb description.
> - s/Optional/Required endpoint property.
> - Move data-lanes description from Ports to endpoint property section.
> 
> v8
> - Added reset-gpios optional property to assert video_aresetn
> 
> v7
> - Removed the control name from dt bindings
> - Updated the example dt node name to csi2rx
> 
> v6
> - Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as suggested by Luca
> - Added reviewed by Rob Herring
> 
> v5
> - Incorporated comments by Luca Cersoli
> - Removed DPHY clock from description and example
> - Removed bayer pattern from device tree MIPI CSI IP
>   doesn't deal with bayer pattern.
> 
> v4
> - Added reviewed by Hyun Kwon
> 
> v3
> - removed interrupt parent as suggested by Rob
> - removed dphy clock
> - moved vfb to optional properties
> - Added required and optional port properties section
> - Added endpoint property section
> 
> v2
> - updated the compatible string to latest version supported
> - removed DPHY related parameters
> - added CSI v2.0 related property (including VCX for supporting upto 16
>   virtual channels).
> - modified csi-pxl-format from string to unsigned int type where the value
>   is as per the CSI specification
> - Defined port 0 and port 1 as sink and source ports.
> - Removed max-lanes property as suggested by Rob and Sakari
> 
>  .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237 +++++++++++++++++++++
>  1 file changed, 237 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> 


My bot found errors running 'make dt_binding_check' on your patch:

/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: allOf:0:if: None is not of type 'object', 'boolean'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: allOf:1:if: None is not of type 'object', 'boolean'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: allOf:0: 'required' is not one of ['$ref', 'if', 'then', 'else']
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: allOf:1: 'not' is not one of ['$ref', 'if', 'then', 'else']
Documentation/devicetree/bindings/Makefile:12: recipe for target 'Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.example.dts' failed
make[1]: *** [Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.example.dts] Error 1
make[1]: *** Waiting for unfinished jobs....
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: ignoring, error in schema: allOf: 0: if
warning: no schema found in file: ./Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml: ignoring, error in schema: allOf: 0: if
warning: no schema found in file: ./Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
Makefile:1300: recipe for target 'dt_binding_check' failed
make: *** [dt_binding_check] Error 2

See https://patchwork.ozlabs.org/patch/1298945

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure dt-schema is up to date:

pip3 install git+https://github.com/devicetree-org/dt-schema.git@master --upgrade

Please check and re-submit.

Hi Laurent,

> -----Original Message-----
> From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Sent: Wednesday, May 27, 2020 9:42 PM
> To: Vishal Sagar <vsagar@xilinx.com>
> Cc: Hyun Kwon <hyunk@xilinx.com>; mchehab@kernel.org;
> robh+dt@kernel.org; mark.rutland@arm.com; Michal Simek
> <michals@xilinx.com>; linux-media@vger.kernel.org;
> devicetree@vger.kernel.org; hans.verkuil@cisco.com; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Dinesh Kumar
> <dineshk@xilinx.com>; Sandip Kothari <sandipk@xilinx.com>; Luca Ceresoli
> <luca@lucaceresoli.net>; Jacopo Mondi <jacopo@jmondi.org>
> Subject: Re: [PATCH v14 1/2] media: dt-bindings: media: xilinx: Add Xilinx MIPI
> CSI-2 Rx Subsystem
> 
> Hi Vishal,
> 
> Thank you for the patch.
> 
> On Wed, May 27, 2020 at 07:27:18PM +0530, Vishal Sagar wrote:
> > Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.
> >
> > The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx controller,
> > a D-PHY in Rx mode and a Video Format Bridge.
> >
> > Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
> > Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > ---
> > v14
> > - Removed xlnx,csi-pxl-format from required properties
> > - Added dependency of xlnx,csi-pxl-format on xlnx,vfb
> > - End the yaml file with ...
> > - Added Reviewed by Laurent
> >
> > v13
> > - Based on Laurent's suggestions
> > - Fixed the datatypes values as minimum and maximum
> > - condition added for en-vcx property
> >
> > v12
> > - Moved to yaml format
> > - Update CSI-2 and D-PHY
> > - Mention that bindings for D-PHY not here
> > - reset -> video-reset
> >
> > v11
> > - Modify compatible string from 4.0 to 5.0
> >
> > v10
> > - No changes
> >
> > v9
> > - Fix xlnx,vfb description.
> > - s/Optional/Required endpoint property.
> > - Move data-lanes description from Ports to endpoint property section.
> >
> > v8
> > - Added reset-gpios optional property to assert video_aresetn
> >
> > v7
> > - Removed the control name from dt bindings
> > - Updated the example dt node name to csi2rx
> >
> > v6
> > - Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as
> > suggested by Luca
> > - Added reviewed by Rob Herring
> >
> > v5
> > - Incorporated comments by Luca Cersoli
> > - Removed DPHY clock from description and example
> > - Removed bayer pattern from device tree MIPI CSI IP
> >   doesn't deal with bayer pattern.
> >
> > v4
> > - Added reviewed by Hyun Kwon
> >
> > v3
> > - removed interrupt parent as suggested by Rob
> > - removed dphy clock
> > - moved vfb to optional properties
> > - Added required and optional port properties section
> > - Added endpoint property section
> >
> > v2
> > - updated the compatible string to latest version supported
> > - removed DPHY related parameters
> > - added CSI v2.0 related property (including VCX for supporting upto 16
> >   virtual channels).
> > - modified csi-pxl-format from string to unsigned int type where the value
> >   is as per the CSI specification
> > - Defined port 0 and port 1 as sink and source ports.
> > - Removed max-lanes property as suggested by Rob and Sakari
> >
> >  .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237
> +++++++++++++++++++++
> >  1 file changed, 237 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > new file mode 100644
> > index 0000000..2282231
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yam
> > +++ l
> > @@ -0,0 +1,237 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/xilinx/xlnx,csi2rxss.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xilinx MIPI CSI-2 Receiver Subsystem
> > +
> > +maintainers:
> > +  - Vishal Sagar <vishal.sagar@xilinx.com>
> > +
> > +description: |
> > +  The Xilinx MIPI CSI-2 Receiver Subsystem is used to capture MIPI
> > +CSI-2
> > +  traffic from compliant camera sensors and send the output as AXI4
> > +Stream
> > +  video data for image processing.
> > +  The subsystem consists of a MIPI D-PHY in slave mode which captures
> > +the
> > +  data packets. This is passed along the MIPI CSI-2 Rx IP which
> > +extracts the
> > +  packet data. The optional Video Format Bridge (VFB) converts this
> > +data to
> > +  AXI4 Stream video data.
> > +  For more details, please refer to PG232 Xilinx MIPI CSI-2 Receiver
> Subsystem.
> > +  Please note that this bindings includes only the MIPI CSI-2 Rx
> > +controller
> > +  and Video Format Bridge and not D-PHY.
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +        - xlnx,mipi-csi2-rx-subsystem-5.0
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    description: List of clock specifiers
> > +    items:
> > +      - description: AXI Lite clock
> > +      - description: Video clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: lite_aclk
> > +      - const: video_aclk
> > +
> > +  xlnx,csi-pxl-format:
> > +    description: |
> > +      This denotes the CSI Data type selected in hw design.
> > +      Packets other than this data type (except for RAW8 and
> > +      User defined data types) will be filtered out.
> > +      Possible values are as below -
> > +      0x1e - YUV4228B
> > +      0x1f - YUV42210B
> > +      0x20 - RGB444
> > +      0x21 - RGB555
> > +      0x22 - RGB565
> > +      0x23 - RGB666
> > +      0x24 - RGB888
> > +      0x28 - RAW6
> > +      0x29 - RAW7
> > +      0x2a - RAW8
> > +      0x2b - RAW10
> > +      0x2c - RAW12
> > +      0x2d - RAW14
> > +      0x2e - RAW16
> > +      0x2f - RAW20
> > +    allOf:
> > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > +      - anyOf:
> > +        - minimum: 0x1e
> > +        - maximum: 0x24
> > +        - minimum: 0x28
> > +        - maximum: 0x2f
> > +
> > +  xlnx,vfb:
> > +    type: boolean
> > +    description: Present when Video Format Bridge is enabled in IP
> > + configuration
> > +
> > +  xlnx,en-csi-v2-0:
> > +    type: boolean
> > +    description: Present if CSI v2 is enabled in IP configuration.
> > +
> > +  xlnx,en-vcx:
> > +    type: boolean
> > +    description: |
> > +      When present, there are maximum 16 virtual channels, else only 4.
> > +
> > +  xlnx,en-active-lanes:
> > +    type: boolean
> > +    description: |
> > +      Present if the number of active lanes can be re-configured at
> > +      runtime in the Protocol Configuration Register. Otherwise all lanes,
> > +      as set in IP configuration, are always active.
> > +
> > +  video-reset-gpios:
> > +    description: Optional specifier for a GPIO that asserts video_aresetn.
> > +    maxItems: 1
> > +
> > +  ports:
> > +    type: object
> > +
> > +    properties:
> > +      port@0:
> > +        type: object
> > +        description: |
> > +          Input / sink port node, single endpoint describing the
> > +          CSI-2 transmitter.
> > +
> > +        properties:
> > +          reg:
> > +            const: 0
> > +
> > +          endpoint:
> > +            type: object
> > +
> > +            properties:
> > +
> > +              data-lanes:
> > +                description: |
> > +                  This is required only in the sink port 0 endpoint which
> > +                  connects to MIPI CSI-2 source like sensor.
> > +                  The possible values are -
> > +                  1       - For 1 lane enabled in IP.
> > +                  1 2     - For 2 lanes enabled in IP.
> > +                  1 2 3   - For 3 lanes enabled in IP.
> > +                  1 2 3 4 - For 4 lanes enabled in IP.
> > +                items:
> > +                  - const: 1
> > +                  - const: 2
> > +                  - const: 3
> > +                  - const: 4
> > +
> > +              remote-endpoint: true
> > +
> > +            required:
> > +              - data-lanes
> > +              - remote-endpoint
> > +
> > +            additionalProperties: false
> > +
> > +        additionalProperties: false
> > +
> > +      port@1:
> > +        type: object
> > +        description: |
> > +          Output / source port node, endpoint describing modules
> > +          connected the CSI-2 receiver.
> > +
> > +        properties:
> > +
> > +          reg:
> > +            const: 1
> > +
> > +          endpoint:
> > +            type: object
> > +
> > +            properties:
> > +
> > +              remote-endpoint: true
> > +
> > +            required:
> > +              - remote-endpoint
> > +
> > +            additionalProperties: false
> > +
> > +        additionalProperties: false
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - clocks
> > +  - clock-names
> > +  - ports
> > +
> > +allOf:
> > +  - if:
> > +    required:
> > +      - xlnx,vfb
> > +    then:
> > +      required:
> > +        - xlnx,csi-pxl-format
> > +    else:
> > +      properties:
> > +        xlnx,csi-pxl-format: false
> > +
> > +  - if:
> > +    not:
> > +      required:
> > +        - xlnx,en-csi-v2-0
> > +    then:
> > +      properties:
> > +        xlnx,en-vcx: false
> 
> There's an indentation problem here, it should be
> 
> allOf:
>   - if:
>       required:
>         - xlnx,vfb
>     then:
>       required:
>         - xlnx,csi-pxl-format
>     else:
>       properties:
>         xlnx,csi-pxl-format: false
> 
>   - if:
>       not:
>         required:
>           - xlnx,en-csi-v2-0
>     then:
>       properties:
>         xlnx,en-vcx: false
> 
> Have you run the bindings checks ?
> 
> make
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/xilinx/xlnx,csi
> 2rxss.yaml dt_binding_check
> 
> It would have caught the issue.
> 

By mistake the incorrect patch was sent. Apologies for this.

> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    xcsi2rxss_1: csi2rx@a0020000 {
> > +        compatible = "xlnx,mipi-csi2-rx-subsystem-5.0";
> > +        reg = <0x0 0xa0020000 0x0 0x10000>;
> 
> I think I mentioned in a previous review that this should be
> 
>         reg = <0xa0020000 0x10000>;
> 
> even if it doesn't match what the real values, as dt_binding_check compiles
> the examples in the context of a bus that has #address-cells = <1> and #size-
> cells = <1>.
> 
> I can fix these when applying the patches to my tree if that's OK with you, and
> send a pull request.
> 

Yes that is fine. Thanks!

> > +        interrupt-parent = <&gic>;
> > +        interrupts = <0 95 4>;
> > +        xlnx,csi-pxl-format = <0x2a>;
> > +        xlnx,vfb;
> > +        xlnx,en-active-lanes;
> > +        xlnx,en-csi-v2-0;
> > +        xlnx,en-vcx;
> > +        clock-names = "lite_aclk", "video_aclk";
> > +        clocks = <&misc_clk_0>, <&misc_clk_1>;
> > +        video-reset-gpios = <&gpio 86 GPIO_ACTIVE_LOW>;
> > +
> > +        ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            port@0 {
> > +                /* Sink port */
> > +                reg = <0>;
> > +                csiss_in: endpoint {
> > +                    data-lanes = <1 2 3 4>;
> > +                    /* MIPI CSI-2 Camera handle */
> > +                    remote-endpoint = <&camera_out>;
> > +                };
> > +            };
> > +            port@1 {
> > +                /* Source port */
> > +                reg = <1>;
> > +                csiss_out: endpoint {
> > +                    remote-endpoint = <&vproc_in>;
> > +                };
> > +            };
> > +        };
> > +    };
> > +...
> 
> --
> Regards,
> 
> Laurent Pinchart

Regards
Vishal Sagar

Hi Vishal,

On Thu, May 28, 2020 at 07:25:12AM +0000, Vishal Sagar wrote:
> On Wednesday, May 27, 2020 9:42 PM, Laurent Pinchart wrote:
> > On Wed, May 27, 2020 at 07:27:18PM +0530, Vishal Sagar wrote:
> > > Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.
> > >
> > > The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx controller,
> > > a D-PHY in Rx mode and a Video Format Bridge.
> > >
> > > Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
> > > Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
> > > Reviewed-by: Rob Herring <robh@kernel.org>
> > > Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > ---
> > > v14
> > > - Removed xlnx,csi-pxl-format from required properties
> > > - Added dependency of xlnx,csi-pxl-format on xlnx,vfb
> > > - End the yaml file with ...
> > > - Added Reviewed by Laurent
> > >
> > > v13
> > > - Based on Laurent's suggestions
> > > - Fixed the datatypes values as minimum and maximum
> > > - condition added for en-vcx property
> > >
> > > v12
> > > - Moved to yaml format
> > > - Update CSI-2 and D-PHY
> > > - Mention that bindings for D-PHY not here
> > > - reset -> video-reset
> > >
> > > v11
> > > - Modify compatible string from 4.0 to 5.0
> > >
> > > v10
> > > - No changes
> > >
> > > v9
> > > - Fix xlnx,vfb description.
> > > - s/Optional/Required endpoint property.
> > > - Move data-lanes description from Ports to endpoint property section.
> > >
> > > v8
> > > - Added reset-gpios optional property to assert video_aresetn
> > >
> > > v7
> > > - Removed the control name from dt bindings
> > > - Updated the example dt node name to csi2rx
> > >
> > > v6
> > > - Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as
> > > suggested by Luca
> > > - Added reviewed by Rob Herring
> > >
> > > v5
> > > - Incorporated comments by Luca Cersoli
> > > - Removed DPHY clock from description and example
> > > - Removed bayer pattern from device tree MIPI CSI IP
> > >   doesn't deal with bayer pattern.
> > >
> > > v4
> > > - Added reviewed by Hyun Kwon
> > >
> > > v3
> > > - removed interrupt parent as suggested by Rob
> > > - removed dphy clock
> > > - moved vfb to optional properties
> > > - Added required and optional port properties section
> > > - Added endpoint property section
> > >
> > > v2
> > > - updated the compatible string to latest version supported
> > > - removed DPHY related parameters
> > > - added CSI v2.0 related property (including VCX for supporting upto 16
> > >   virtual channels).
> > > - modified csi-pxl-format from string to unsigned int type where the value
> > >   is as per the CSI specification
> > > - Defined port 0 and port 1 as sink and source ports.
> > > - Removed max-lanes property as suggested by Rob and Sakari
> > >
> > >  .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237
> > +++++++++++++++++++++
> > >  1 file changed, 237 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > > b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > > new file mode 100644
> > > index 0000000..2282231
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yam
> > > +++ l
> > > @@ -0,0 +1,237 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/xilinx/xlnx,csi2rxss.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Xilinx MIPI CSI-2 Receiver Subsystem
> > > +
> > > +maintainers:
> > > +  - Vishal Sagar <vishal.sagar@xilinx.com>
> > > +
> > > +description: |
> > > +  The Xilinx MIPI CSI-2 Receiver Subsystem is used to capture MIPI
> > > +CSI-2
> > > +  traffic from compliant camera sensors and send the output as AXI4
> > > +Stream
> > > +  video data for image processing.
> > > +  The subsystem consists of a MIPI D-PHY in slave mode which captures
> > > +the
> > > +  data packets. This is passed along the MIPI CSI-2 Rx IP which
> > > +extracts the
> > > +  packet data. The optional Video Format Bridge (VFB) converts this
> > > +data to
> > > +  AXI4 Stream video data.
> > > +  For more details, please refer to PG232 Xilinx MIPI CSI-2 Receiver
> > Subsystem.
> > > +  Please note that this bindings includes only the MIPI CSI-2 Rx
> > > +controller
> > > +  and Video Format Bridge and not D-PHY.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    items:
> > > +      - enum:
> > > +        - xlnx,mipi-csi2-rx-subsystem-5.0
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  interrupts:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    description: List of clock specifiers
> > > +    items:
> > > +      - description: AXI Lite clock
> > > +      - description: Video clock
> > > +
> > > +  clock-names:
> > > +    items:
> > > +      - const: lite_aclk
> > > +      - const: video_aclk
> > > +
> > > +  xlnx,csi-pxl-format:
> > > +    description: |
> > > +      This denotes the CSI Data type selected in hw design.
> > > +      Packets other than this data type (except for RAW8 and
> > > +      User defined data types) will be filtered out.
> > > +      Possible values are as below -
> > > +      0x1e - YUV4228B
> > > +      0x1f - YUV42210B
> > > +      0x20 - RGB444
> > > +      0x21 - RGB555
> > > +      0x22 - RGB565
> > > +      0x23 - RGB666
> > > +      0x24 - RGB888
> > > +      0x28 - RAW6
> > > +      0x29 - RAW7
> > > +      0x2a - RAW8
> > > +      0x2b - RAW10
> > > +      0x2c - RAW12
> > > +      0x2d - RAW14
> > > +      0x2e - RAW16
> > > +      0x2f - RAW20
> > > +    allOf:
> > > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > > +      - anyOf:
> > > +        - minimum: 0x1e
> > > +        - maximum: 0x24
> > > +        - minimum: 0x28
> > > +        - maximum: 0x2f
> > > +
> > > +  xlnx,vfb:
> > > +    type: boolean
> > > +    description: Present when Video Format Bridge is enabled in IP
> > > + configuration
> > > +
> > > +  xlnx,en-csi-v2-0:
> > > +    type: boolean
> > > +    description: Present if CSI v2 is enabled in IP configuration.
> > > +
> > > +  xlnx,en-vcx:
> > > +    type: boolean
> > > +    description: |
> > > +      When present, there are maximum 16 virtual channels, else only 4.
> > > +
> > > +  xlnx,en-active-lanes:
> > > +    type: boolean
> > > +    description: |
> > > +      Present if the number of active lanes can be re-configured at
> > > +      runtime in the Protocol Configuration Register. Otherwise all lanes,
> > > +      as set in IP configuration, are always active.
> > > +
> > > +  video-reset-gpios:
> > > +    description: Optional specifier for a GPIO that asserts video_aresetn.
> > > +    maxItems: 1
> > > +
> > > +  ports:
> > > +    type: object
> > > +
> > > +    properties:
> > > +      port@0:
> > > +        type: object
> > > +        description: |
> > > +          Input / sink port node, single endpoint describing the
> > > +          CSI-2 transmitter.
> > > +
> > > +        properties:
> > > +          reg:
> > > +            const: 0
> > > +
> > > +          endpoint:
> > > +            type: object
> > > +
> > > +            properties:
> > > +
> > > +              data-lanes:
> > > +                description: |
> > > +                  This is required only in the sink port 0 endpoint which
> > > +                  connects to MIPI CSI-2 source like sensor.
> > > +                  The possible values are -
> > > +                  1       - For 1 lane enabled in IP.
> > > +                  1 2     - For 2 lanes enabled in IP.
> > > +                  1 2 3   - For 3 lanes enabled in IP.
> > > +                  1 2 3 4 - For 4 lanes enabled in IP.
> > > +                items:
> > > +                  - const: 1
> > > +                  - const: 2
> > > +                  - const: 3
> > > +                  - const: 4
> > > +
> > > +              remote-endpoint: true
> > > +
> > > +            required:
> > > +              - data-lanes
> > > +              - remote-endpoint
> > > +
> > > +            additionalProperties: false
> > > +
> > > +        additionalProperties: false
> > > +
> > > +      port@1:
> > > +        type: object
> > > +        description: |
> > > +          Output / source port node, endpoint describing modules
> > > +          connected the CSI-2 receiver.
> > > +
> > > +        properties:
> > > +
> > > +          reg:
> > > +            const: 1
> > > +
> > > +          endpoint:
> > > +            type: object
> > > +
> > > +            properties:
> > > +
> > > +              remote-endpoint: true
> > > +
> > > +            required:
> > > +              - remote-endpoint
> > > +
> > > +            additionalProperties: false
> > > +
> > > +        additionalProperties: false
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - interrupts
> > > +  - clocks
> > > +  - clock-names
> > > +  - ports
> > > +
> > > +allOf:
> > > +  - if:
> > > +    required:
> > > +      - xlnx,vfb
> > > +    then:
> > > +      required:
> > > +        - xlnx,csi-pxl-format
> > > +    else:
> > > +      properties:
> > > +        xlnx,csi-pxl-format: false
> > > +
> > > +  - if:
> > > +    not:
> > > +      required:
> > > +        - xlnx,en-csi-v2-0
> > > +    then:
> > > +      properties:
> > > +        xlnx,en-vcx: false
> > 
> > There's an indentation problem here, it should be
> > 
> > allOf:
> >   - if:
> >       required:
> >         - xlnx,vfb
> >     then:
> >       required:
> >         - xlnx,csi-pxl-format
> >     else:
> >       properties:
> >         xlnx,csi-pxl-format: false
> > 
> >   - if:
> >       not:
> >         required:
> >           - xlnx,en-csi-v2-0
> >     then:
> >       properties:
> >         xlnx,en-vcx: false
> > 
> > Have you run the bindings checks ?
> > 
> > make
> > DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/xilinx/xlnx,csi
> > 2rxss.yaml dt_binding_check
> > 
> > It would have caught the issue.
> > 
> 
> By mistake the incorrect patch was sent. Apologies for this.
> 
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/gpio/gpio.h>
> > > +    xcsi2rxss_1: csi2rx@a0020000 {
> > > +        compatible = "xlnx,mipi-csi2-rx-subsystem-5.0";
> > > +        reg = <0x0 0xa0020000 0x0 0x10000>;
> > 
> > I think I mentioned in a previous review that this should be
> > 
> >         reg = <0xa0020000 0x10000>;
> > 
> > even if it doesn't match what the real values, as dt_binding_check compiles
> > the examples in the context of a bus that has #address-cells = <1> and #size-
> > cells = <1>.
> > 
> > I can fix these when applying the patches to my tree if that's OK with you, and
> > send a pull request.
> 
> Yes that is fine. Thanks!

I've sent the pull request, the code should be merged in v5.9.

> > > +        interrupt-parent = <&gic>;
> > > +        interrupts = <0 95 4>;
> > > +        xlnx,csi-pxl-format = <0x2a>;
> > > +        xlnx,vfb;
> > > +        xlnx,en-active-lanes;
> > > +        xlnx,en-csi-v2-0;
> > > +        xlnx,en-vcx;
> > > +        clock-names = "lite_aclk", "video_aclk";
> > > +        clocks = <&misc_clk_0>, <&misc_clk_1>;
> > > +        video-reset-gpios = <&gpio 86 GPIO_ACTIVE_LOW>;
> > > +
> > > +        ports {
> > > +            #address-cells = <1>;
> > > +            #size-cells = <0>;
> > > +
> > > +            port@0 {
> > > +                /* Sink port */
> > > +                reg = <0>;
> > > +                csiss_in: endpoint {
> > > +                    data-lanes = <1 2 3 4>;
> > > +                    /* MIPI CSI-2 Camera handle */
> > > +                    remote-endpoint = <&camera_out>;
> > > +                };
> > > +            };
> > > +            port@1 {
> > > +                /* Source port */
> > > +                reg = <1>;
> > > +                csiss_out: endpoint {
> > > +                    remote-endpoint = <&vproc_in>;
> > > +                };
> > > +            };
> > > +        };
> > > +    };
> > > +...

Hi Laurent,

> -----Original Message-----
> From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Sent: Sunday, June 7, 2020 7:10 AM
> To: Vishal Sagar <vsagar@xilinx.com>
> Cc: Hyun Kwon <hyunk@xilinx.com>; mchehab@kernel.org;
> robh+dt@kernel.org; mark.rutland@arm.com; Michal Simek
> <michals@xilinx.com>; linux-media@vger.kernel.org;
> devicetree@vger.kernel.org; hans.verkuil@cisco.com; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Dinesh Kumar
> <dineshk@xilinx.com>; Sandip Kothari <sandipk@xilinx.com>; Luca Ceresoli
> <luca@lucaceresoli.net>; Jacopo Mondi <jacopo@jmondi.org>
> Subject: Re: [PATCH v14 1/2] media: dt-bindings: media: xilinx: Add Xilinx MIPI
> CSI-2 Rx Subsystem
> 
> Hi Vishal,
> 
> On Thu, May 28, 2020 at 07:25:12AM +0000, Vishal Sagar wrote:
> > On Wednesday, May 27, 2020 9:42 PM, Laurent Pinchart wrote:
> > > On Wed, May 27, 2020 at 07:27:18PM +0530, Vishal Sagar wrote:
> > > > Add bindings documentation for Xilinx MIPI CSI-2 Rx Subsystem.
> > > >
> > > > The Xilinx MIPI CSI-2 Rx Subsystem consists of a CSI-2 Rx
> > > > controller, a D-PHY in Rx mode and a Video Format Bridge.
> > > >
> > > > Signed-off-by: Vishal Sagar <vishal.sagar@xilinx.com>
> > > > Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
> > > > Reviewed-by: Rob Herring <robh@kernel.org>
> > > > Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
> > > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > > ---
> > > > v14
> > > > - Removed xlnx,csi-pxl-format from required properties
> > > > - Added dependency of xlnx,csi-pxl-format on xlnx,vfb
> > > > - End the yaml file with ...
> > > > - Added Reviewed by Laurent
> > > >
> > > > v13
> > > > - Based on Laurent's suggestions
> > > > - Fixed the datatypes values as minimum and maximum
> > > > - condition added for en-vcx property
> > > >
> > > > v12
> > > > - Moved to yaml format
> > > > - Update CSI-2 and D-PHY
> > > > - Mention that bindings for D-PHY not here
> > > > - reset -> video-reset
> > > >
> > > > v11
> > > > - Modify compatible string from 4.0 to 5.0
> > > >
> > > > v10
> > > > - No changes
> > > >
> > > > v9
> > > > - Fix xlnx,vfb description.
> > > > - s/Optional/Required endpoint property.
> > > > - Move data-lanes description from Ports to endpoint property section.
> > > >
> > > > v8
> > > > - Added reset-gpios optional property to assert video_aresetn
> > > >
> > > > v7
> > > > - Removed the control name from dt bindings
> > > > - Updated the example dt node name to csi2rx
> > > >
> > > > v6
> > > > - Added "control" after V4L2_CID_XILINX_MIPICSISS_ACT_LANES as
> > > > suggested by Luca
> > > > - Added reviewed by Rob Herring
> > > >
> > > > v5
> > > > - Incorporated comments by Luca Cersoli
> > > > - Removed DPHY clock from description and example
> > > > - Removed bayer pattern from device tree MIPI CSI IP
> > > >   doesn't deal with bayer pattern.
> > > >
> > > > v4
> > > > - Added reviewed by Hyun Kwon
> > > >
> > > > v3
> > > > - removed interrupt parent as suggested by Rob
> > > > - removed dphy clock
> > > > - moved vfb to optional properties
> > > > - Added required and optional port properties section
> > > > - Added endpoint property section
> > > >
> > > > v2
> > > > - updated the compatible string to latest version supported
> > > > - removed DPHY related parameters
> > > > - added CSI v2.0 related property (including VCX for supporting upto 16
> > > >   virtual channels).
> > > > - modified csi-pxl-format from string to unsigned int type where the value
> > > >   is as per the CSI specification
> > > > - Defined port 0 and port 1 as sink and source ports.
> > > > - Removed max-lanes property as suggested by Rob and Sakari
> > > >
> > > >  .../bindings/media/xilinx/xlnx,csi2rxss.yaml       | 237
> > > +++++++++++++++++++++
> > > >  1 file changed, 237 insertions(+)  create mode 100644
> > > > Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yaml
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yam
> > > > l
> > > > b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.yam
> > > > l
> > > > new file mode 100644
> > > > index 0000000..2282231
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss
> > > > +++ .yam
> > > > +++ l
> > > > @@ -0,0 +1,237 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML
> > > > +1.2
> > > > +---
> > > > +$id:
> > > > +http://devicetree.org/schemas/media/xilinx/xlnx,csi2rxss.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Xilinx MIPI CSI-2 Receiver Subsystem
> > > > +
> > > > +maintainers:
> > > > +  - Vishal Sagar <vishal.sagar@xilinx.com>
> > > > +
> > > > +description: |
> > > > +  The Xilinx MIPI CSI-2 Receiver Subsystem is used to capture
> > > > +MIPI
> > > > +CSI-2
> > > > +  traffic from compliant camera sensors and send the output as
> > > > +AXI4 Stream
> > > > +  video data for image processing.
> > > > +  The subsystem consists of a MIPI D-PHY in slave mode which
> > > > +captures the
> > > > +  data packets. This is passed along the MIPI CSI-2 Rx IP which
> > > > +extracts the
> > > > +  packet data. The optional Video Format Bridge (VFB) converts
> > > > +this data to
> > > > +  AXI4 Stream video data.
> > > > +  For more details, please refer to PG232 Xilinx MIPI CSI-2
> > > > +Receiver
> > > Subsystem.
> > > > +  Please note that this bindings includes only the MIPI CSI-2 Rx
> > > > +controller
> > > > +  and Video Format Bridge and not D-PHY.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    items:
> > > > +      - enum:
> > > > +        - xlnx,mipi-csi2-rx-subsystem-5.0
> > > > +
> > > > +  reg:
> > > > +    maxItems: 1
> > > > +
> > > > +  interrupts:
> > > > +    maxItems: 1
> > > > +
> > > > +  clocks:
> > > > +    description: List of clock specifiers
> > > > +    items:
> > > > +      - description: AXI Lite clock
> > > > +      - description: Video clock
> > > > +
> > > > +  clock-names:
> > > > +    items:
> > > > +      - const: lite_aclk
> > > > +      - const: video_aclk
> > > > +
> > > > +  xlnx,csi-pxl-format:
> > > > +    description: |
> > > > +      This denotes the CSI Data type selected in hw design.
> > > > +      Packets other than this data type (except for RAW8 and
> > > > +      User defined data types) will be filtered out.
> > > > +      Possible values are as below -
> > > > +      0x1e - YUV4228B
> > > > +      0x1f - YUV42210B
> > > > +      0x20 - RGB444
> > > > +      0x21 - RGB555
> > > > +      0x22 - RGB565
> > > > +      0x23 - RGB666
> > > > +      0x24 - RGB888
> > > > +      0x28 - RAW6
> > > > +      0x29 - RAW7
> > > > +      0x2a - RAW8
> > > > +      0x2b - RAW10
> > > > +      0x2c - RAW12
> > > > +      0x2d - RAW14
> > > > +      0x2e - RAW16
> > > > +      0x2f - RAW20
> > > > +    allOf:
> > > > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > > > +      - anyOf:
> > > > +        - minimum: 0x1e
> > > > +        - maximum: 0x24
> > > > +        - minimum: 0x28
> > > > +        - maximum: 0x2f
> > > > +
> > > > +  xlnx,vfb:
> > > > +    type: boolean
> > > > +    description: Present when Video Format Bridge is enabled in
> > > > + IP configuration
> > > > +
> > > > +  xlnx,en-csi-v2-0:
> > > > +    type: boolean
> > > > +    description: Present if CSI v2 is enabled in IP configuration.
> > > > +
> > > > +  xlnx,en-vcx:
> > > > +    type: boolean
> > > > +    description: |
> > > > +      When present, there are maximum 16 virtual channels, else only 4.
> > > > +
> > > > +  xlnx,en-active-lanes:
> > > > +    type: boolean
> > > > +    description: |
> > > > +      Present if the number of active lanes can be re-configured at
> > > > +      runtime in the Protocol Configuration Register. Otherwise all lanes,
> > > > +      as set in IP configuration, are always active.
> > > > +
> > > > +  video-reset-gpios:
> > > > +    description: Optional specifier for a GPIO that asserts video_aresetn.
> > > > +    maxItems: 1
> > > > +
> > > > +  ports:
> > > > +    type: object
> > > > +
> > > > +    properties:
> > > > +      port@0:
> > > > +        type: object
> > > > +        description: |
> > > > +          Input / sink port node, single endpoint describing the
> > > > +          CSI-2 transmitter.
> > > > +
> > > > +        properties:
> > > > +          reg:
> > > > +            const: 0
> > > > +
> > > > +          endpoint:
> > > > +            type: object
> > > > +
> > > > +            properties:
> > > > +
> > > > +              data-lanes:
> > > > +                description: |
> > > > +                  This is required only in the sink port 0 endpoint which
> > > > +                  connects to MIPI CSI-2 source like sensor.
> > > > +                  The possible values are -
> > > > +                  1       - For 1 lane enabled in IP.
> > > > +                  1 2     - For 2 lanes enabled in IP.
> > > > +                  1 2 3   - For 3 lanes enabled in IP.
> > > > +                  1 2 3 4 - For 4 lanes enabled in IP.
> > > > +                items:
> > > > +                  - const: 1
> > > > +                  - const: 2
> > > > +                  - const: 3
> > > > +                  - const: 4
> > > > +
> > > > +              remote-endpoint: true
> > > > +
> > > > +            required:
> > > > +              - data-lanes
> > > > +              - remote-endpoint
> > > > +
> > > > +            additionalProperties: false
> > > > +
> > > > +        additionalProperties: false
> > > > +
> > > > +      port@1:
> > > > +        type: object
> > > > +        description: |
> > > > +          Output / source port node, endpoint describing modules
> > > > +          connected the CSI-2 receiver.
> > > > +
> > > > +        properties:
> > > > +
> > > > +          reg:
> > > > +            const: 1
> > > > +
> > > > +          endpoint:
> > > > +            type: object
> > > > +
> > > > +            properties:
> > > > +
> > > > +              remote-endpoint: true
> > > > +
> > > > +            required:
> > > > +              - remote-endpoint
> > > > +
> > > > +            additionalProperties: false
> > > > +
> > > > +        additionalProperties: false
> > > > +
> > > > +required:
> > > > +  - compatible
> > > > +  - reg
> > > > +  - interrupts
> > > > +  - clocks
> > > > +  - clock-names
> > > > +  - ports
> > > > +
> > > > +allOf:
> > > > +  - if:
> > > > +    required:
> > > > +      - xlnx,vfb
> > > > +    then:
> > > > +      required:
> > > > +        - xlnx,csi-pxl-format
> > > > +    else:
> > > > +      properties:
> > > > +        xlnx,csi-pxl-format: false
> > > > +
> > > > +  - if:
> > > > +    not:
> > > > +      required:
> > > > +        - xlnx,en-csi-v2-0
> > > > +    then:
> > > > +      properties:
> > > > +        xlnx,en-vcx: false
> > >
> > > There's an indentation problem here, it should be
> > >
> > > allOf:
> > >   - if:
> > >       required:
> > >         - xlnx,vfb
> > >     then:
> > >       required:
> > >         - xlnx,csi-pxl-format
> > >     else:
> > >       properties:
> > >         xlnx,csi-pxl-format: false
> > >
> > >   - if:
> > >       not:
> > >         required:
> > >           - xlnx,en-csi-v2-0
> > >     then:
> > >       properties:
> > >         xlnx,en-vcx: false
> > >
> > > Have you run the bindings checks ?
> > >
> > > make
> > > DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/xilinx/xlnx,
> > > csi
> > > 2rxss.yaml dt_binding_check
> > >
> > > It would have caught the issue.
> > >
> >
> > By mistake the incorrect patch was sent. Apologies for this.
> >
> > > > +
> > > > +additionalProperties: false
> > > > +
> > > > +examples:
> > > > +  - |
> > > > +    #include <dt-bindings/gpio/gpio.h>
> > > > +    xcsi2rxss_1: csi2rx@a0020000 {
> > > > +        compatible = "xlnx,mipi-csi2-rx-subsystem-5.0";
> > > > +        reg = <0x0 0xa0020000 0x0 0x10000>;
> > >
> > > I think I mentioned in a previous review that this should be
> > >
> > >         reg = <0xa0020000 0x10000>;
> > >
> > > even if it doesn't match what the real values, as dt_binding_check
> > > compiles the examples in the context of a bus that has
> > > #address-cells = <1> and #size- cells = <1>.
> > >
> > > I can fix these when applying the patches to my tree if that's OK
> > > with you, and send a pull request.
> >
> > Yes that is fine. Thanks!
> 
> I've sent the pull request, the code should be merged in v5.9.
> 

Thank you. This made my day. 😊

> > > > +        interrupt-parent = <&gic>;
> > > > +        interrupts = <0 95 4>;
> > > > +        xlnx,csi-pxl-format = <0x2a>;
> > > > +        xlnx,vfb;
> > > > +        xlnx,en-active-lanes;
> > > > +        xlnx,en-csi-v2-0;
> > > > +        xlnx,en-vcx;
> > > > +        clock-names = "lite_aclk", "video_aclk";
> > > > +        clocks = <&misc_clk_0>, <&misc_clk_1>;
> > > > +        video-reset-gpios = <&gpio 86 GPIO_ACTIVE_LOW>;
> > > > +
> > > > +        ports {
> > > > +            #address-cells = <1>;
> > > > +            #size-cells = <0>;
> > > > +
> > > > +            port@0 {
> > > > +                /* Sink port */
> > > > +                reg = <0>;
> > > > +                csiss_in: endpoint {
> > > > +                    data-lanes = <1 2 3 4>;
> > > > +                    /* MIPI CSI-2 Camera handle */
> > > > +                    remote-endpoint = <&camera_out>;
> > > > +                };
> > > > +            };
> > > > +            port@1 {
> > > > +                /* Source port */
> > > > +                reg = <1>;
> > > > +                csiss_out: endpoint {
> > > > +                    remote-endpoint = <&vproc_in>;
> > > > +                };
> > > > +            };
> > > > +        };
> > > > +    };
> > > > +...
> 
> --
> Regards,
> 
> Laurent Pinchart

Regards
Vishal Sagar