Re: [PATCH RFC v3 1/6] dt-bindings: display: add Unisoc's drm master bindings

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Hi Kevin.

On Fri, Feb 21, 2020 at 03:48:51PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@xxxxxxxxxx>
> 
> The Unisoc DRM master device is a virtual device needed to list all
> DPU devices or other display interface nodes that comprise the
> graphics subsystem
> 
> Cc: Orson Zhai <orsonzhai@xxxxxxxxx>
> Cc: Baolin Wang <baolin.wang@xxxxxxxxxx>
> Cc: Chunyan Zhang <zhang.lyra@xxxxxxxxx>
> Signed-off-by: Kevin Tang <kevin.tang@xxxxxxxxxx>
> ---
>  .../devicetree/bindings/display/sprd/drm.yaml      | 38 ++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/drm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/drm.yaml b/Documentation/devicetree/bindings/display/sprd/drm.yaml
> new file mode 100644
> index 0000000..1614ca6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/drm.yaml
> @@ -0,0 +1,38 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/drm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc DRM master device
> +
> +maintainers:
> +  - David Airlie <airlied@xxxxxxxx>
> +  - Daniel Vetter <daniel@xxxxxxxx>
> +  - Rob Herring <robh+dt@xxxxxxxxxx>
> +  - Mark Rutland <mark.rutland@xxxxxxx>

Rob is king of a super-maintainer.
He should not be listed unless he has special
relations to sprd.
David + Daniel - likewise. Unless they are closely related to sprd drop
them.

> +
> +description: |
> +  The Unisoc DRM master device is a virtual device needed to list all
> +  DPU devices or other display interface nodes that comprise the
> +  graphics subsystem.

I wonder why you name it "Unisoc" when all other places references sprd.


> +
> +properties:
> +  compatible:
> +    const: sprd,display-subsystem
> +
> +  ports:
> +    description:
> +      Should contain a list of phandles pointing to display interface port
> +      of DPU devices.
> +
> +required:
> +  - compatible
> +  - ports
So you want to force the driver to support ports - and no panel
referenced directly?

> +
> +examples:
> +  - |
> +    display-subsystem {
> +        compatible = "sprd,display-subsystem";
> +        ports = <&dpu_out>;
> +    };
> \ No newline at end of file
Please fix.

	Sam
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