linux-kernel - Re: [PATCH v9 2/4] dt-bindings: media: document SK Hynix Hi-846 MIPI CSI-2 8M pixel sensor

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Message-ID: <YaC0cxmXB8kDcDAI@valkosipuli.retiisi.eu>
Date:   Fri, 26 Nov 2021 12:18:27 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Pavel Machek <pavel@....cz>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, kernel@...i.sm,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        phone-devel@...r.kernel.org, Rob Herring <robh@...nel.org>,
        shawnx.tu@...el.com
Subject: Re: [PATCH v9 2/4] dt-bindings: media: document SK Hynix Hi-846 MIPI
 CSI-2 8M pixel sensor

Hi Martin,

On Fri, Nov 26, 2021 at 11:02:31AM +0100, Martin Kepplinger wrote:
> Am Donnerstag, dem 25.11.2021 um 12:15 +0100 schrieb Geert
> Uytterhoeven:
> > On Mon, Sep 6, 2021 at 12:30 PM Martin Kepplinger
> > <martin.kepplinger@...i.sm> wrote:
> > > Document the bindings used for the SK Hynix Hi-846 CMOS camera
> > > driver.
> > > 
> > > Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > > Reviewed-by: Rob Herring <robh@...nel.org>
> > > ---
> > >  .../bindings/media/i2c/hynix,hi846.yaml       | 120
> > > ++++++++++++++++++
> > >  1 file changed, 120 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> > > 
> > > diff --git
> > > a/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> > > b/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> > > new file mode 100644
> > > index 000000000000..85a8877c2f38
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> > > @@ -0,0 +1,120 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/i2c/hynix,hi846.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: SK Hynix Hi-846 1/4" 8M Pixel MIPI CSI-2 sensor
> > > +
> > > +maintainers:
> > > +  - Martin Kepplinger <martin.kepplinger@...i.sm>
> > > +
> > > +description: |-
> > > +  The Hi-846 is a raw image sensor with an MIPI CSI-2 image data
> > > +  interface and CCI (I2C compatible) control bus. The output
> > > format
> > > +  is raw Bayer.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: hynix,hi846
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    items:
> > > +      - description: Reference to the mclk clock.
> > > +
> > > +  assigned-clocks:
> > > +    maxItems: 1
> > > +
> > > +  assigned-clock-rates:
> > > +    maxItems: 1
> > > +
> > > +  reset-gpios:
> > > +    description: Reference to the GPIO connected to the RESETB
> > > pin. Active low.
> > > +    maxItems: 1
> > > +
> > > +  shutdown-gpios:
> > > +    description: Reference to the GPIO connected to the XSHUTDOWN
> > > pin. Active low.
> > > +    maxItems: 1
> > > +
> > > +  vddio-supply:
> > > +    description: Definition of the regulator used for the VDDIO
> > > power supply.
> > > +
> > > +  vdda-supply:
> > > +    description: Definition of the regulator used for the VDDA
> > > power supply.
> > > +
> > > +  vddd-supply:
> > > +    description: Definition of the regulator used for the VDDD
> > > power supply.
> > > +
> > > +  port:
> > > +    $ref: /schemas/graph.yaml#/properties/port
> > > +
> > > +    properties:
> > > +      endpoint:
> > > +        $ref: /schemas/media/video-interfaces.yaml#
> > > +        unevaluatedProperties: false
> > > +
> > > +        properties:
> > > +          data-lanes:
> > > +            oneOf:
> > > +              - items:
> > > +                  - const: 1
> > > +                  - const: 2
> > > +                  - const: 3
> > > +                  - const: 4
> > > +              - items:
> > > +                  - const: 1
> > > +                  - const: 2
> > > +
> > > +        required:
> > > +          - data-lanes
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - clocks
> > > +  - assigned-clocks
> > > +  - assigned-clock-rates
> > > +  - vddio-supply
> > > +  - vdda-supply
> > > +  - vddd-supply
> > > +  - port
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/gpio/gpio.h>
> > > +
> > > +    i2c {
> > > +        #address-cells = <1>;
> > > +        #size-cells = <0>;
> > > +
> > > +        hi846: camera@20 {
> > > +            compatible = "hynix,hi846";
> > > +            reg = <0x20>;
> > > +            pinctrl-names = "default";
> > > +            pinctrl-0 = <&pinctrl_csi1>;
> > > +            clocks = <&clk 0>;
> > > +            assigned-clocks = <&clk 0>;
> > > +            assigned-clock-rates = <25000000>;
> > > +            vdda-supply = <&reg_camera_vdda>;
> > > +            vddd-supply = <&reg_camera_vddd>;
> > > +            vddio-supply = <&reg_camera_vddio>;
> > > +            reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
> > > +            shutdown-gpios = <&gpio5 4 GPIO_ACTIVE_LOW>;
> > > +
> > > +            port {
> > > +                camera_out: endpoint {
> > > +                    remote-endpoint = <&csi1_ep1>;
> > > +                    link-frequencies = /bits/ 64
> > > +                        <80000000 200000000>;
> > > +                    data-lanes = <1 2>;
> > 
> > "make dt_binding_check":
> > 
> >    
> > Documentation/devicetree/bindings/media/i2c/hynix,hi846.example.dt.ya
> > ml:
> > camera@20: port:endpoint: Unevaluated properties are not allowed
> > ('link-frequencies', 'data-lanes' were unexpected)
> >     From schema:
> > Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> > 
> > > +                };
> > > +            };
> > > +        };
> > > +    };
> > 
> > Gr{oetje,eeting}s,
> > 
> >                         Geert
> 
> 
> thanks a lot Geert, but I can't reproduce this on linux-next. Which
> tree did you run it against?
> 
> What I *do* see is the following during dtbs_check, so I guess I could
> remove "orientation" and "rotation" from the example, which would be
> kind of sad because these useful properties are not yet too wide know
> anyway in the media device driver world...
> 
> /home/martin/dev/purism-forks/linux-
> next/arch/arm64/boot/dts/freescale/imx8mq-librem5-r2.dt.yaml:
> camera-front@20: 'orientation', 'rotation' do not match any of the
> regexes: 'pinctrl-[0-9]+'
> 	From schema: /home/martin/dev/purism-forks/linux-
> next/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> 
> 
> if you can be more speicific I'll definitely try to reproduce again
> though.

link-frequencies is present in the example (as it needs to be) but missing
from required properties. I don't know why there's a complaint about
data-lanes though.

-- 
Regards,

Sakari Ailus