linux-kernel - Re: [PATCH 1/2] dt-bindings: display: panel: Add Novatek NT35596S panel bindings

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Date:   Tue, 12 Jul 2022 15:23:32 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     MollySophia <mollysophia379@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: display: panel: Add Novatek NT35596S
 panel bindings

On 09/07/2022 16:04, MollySophia wrote:
> Add documentation for "novatek,nt35596s" panel.
> 
> Signed-off-by: MollySophia <mollysophia379@...il.com>
> ---
>  .../display/panel/novatek,nt35596s.yaml       | 83 +++++++++++++++++++
>  1 file changed, 83 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/novatek,nt35596s.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt35596s.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt35596s.yaml
> new file mode 100644
> index 000000000000..f724f101a6fd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/novatek,nt35596s.yaml
> @@ -0,0 +1,83 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/novatek,nt35596s.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Novatek NT35596S based DSI display Panels
> +
> +maintainers:
> +  - Molly Sophia <mollysophia379@...il.com>
> +
> +description: |
> +  The nt35596s IC from Novatek is a generic DSI Panel IC used to drive dsi
> +  panels.
> +  Right now, support is added only for a JDI FHD+ LCD display panel with a
> +  resolution of 1080x2160. It is a video mode DSI panel.
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - jdi,fhd-nt35596s
> +      - const: novatek,nt35596s

You need to document the novatek and idi vendor prefix in vendor-prefixes.

> +    description: This indicates the panel manufacturer of the panel that is
> +      in turn using the NT35596S panel driver. This compatible string
> +      determines how the NT35596S panel driver is configured for the indicated
> +      panel. The novatek,nt35596s compatible shall always be provided as a fallback.

Drop description, it does not make sense and last sentence duplicates
the schema.

> +
> +  vddi0-supply:
> +    description: regulator that provides the supply voltage
> +      Power IC supply

"regulator that provides the supply voltage" is redundant, drop it.
Instead what is it supplying?

> +
> +  vddpos-supply:
> +    description: positive boost supply regulator
> +
> +  vddneg-supply:
> +    description: negative boost supply regulator
> +
> +  reg: true

Any reg is accepted or is there only one reg? Does it come from other
schema?



Best regards,
Krzysztof