Re: [PATCH 2/2 v5] drm/panel: Add DT bindings for Sony ACX424AKP

[Rob Herring <robh@kernel.org>]

On Sun, Nov 03, 2019 at 09:54:59PM +0100, Linus Walleij wrote:
> This adds device tree bindings for the Sony ACX424AKP panel.
> Let's use YAML.
> 
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v4->v5:
> - Fix up all warnings etc incurred from the now working schema check
>   and DTS compilation.
> - I still have a vert annoying error message in the Sony
>   panel bindings that uses this schema:
>   sony,acx424akp.example.dt.yaml: panel@0: $nodename:0: 'panel@0' does not match '^dsi-controller(@.*)?$'
>   As this is modeled very closely to
>   Documentation/devicetree/bindings/net/mdio.yaml
>   and that one doesn't emit this type of warning for its ethernet-phy@0
>   etc I am pretty much clueless and just can't see what the problem
>   is.

I thought I told you what the problem is on the last version. See below.

> - If I can't figure this out the only viable next step is to drop the
>   ambition to create yaml bindings simply because I'm unable to do
>   it, and go back to traditional text bindings :(
> ChangeLog v3->v4:
> - Adjust to adjusted DSI bindings.
> ChangeLog v2->v3:
> - Put the example inside a dsi-controller so we have a complete
>   example that verifies to the DSI panel generic binding.
> ChangeLog v1->v2:
> - Suggest a stand-alone YAML bindings file for DSI panels in
>   a separate patch, and use that to reference the
>   boolean "enforce-video-mode" attribute for DSI panels
> ---
>  .../display/panel/sony,acx424akp.yaml         | 50 +++++++++++++++++++
>  1 file changed, 50 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
> new file mode 100644
> index 000000000000..1c123139b80a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
> @@ -0,0 +1,50 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/sony,acx424akp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sony ACX424AKP 4" 480x864 AMOLED panel
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@linaro.org>
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +  - $ref: ../dsi-controller.yaml#

This schema is for a panel node, not the dsi-controller. You need to 
drop this line. It should be included by DSI controllers.

> +
> +properties:
> +  compatible:
> +    const: sony,acx424akp
> +  reg: true
> +  reset-gpios: true
> +  vddi-supply:
> +     description: regulator that supplies the vddi voltage
> +  enforce-video-mode: true
> +
> +required:
> +  - compatible
> +  - reg
> +  - reset-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    dsi-controller@a0351000 {
> +        compatible = "ste,mcde-dsi";
> +        reg = <0xa0351000 0x1000>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        panel@0 {
> +            compatible = "sony,acx424akp";
> +            reg = <0>;
> +            vddi-supply = <&foo>;
> +            reset-gpios = <&foo_gpio 0 GPIO_ACTIVE_LOW>;
> +        };
> +    };
> +
> +...
> -- 
> 2.21.0
>