linux-kernel - Re: [PATCH v4 1/3] dt-bindings: display: panel: Add Samsung S6D7AA0 LCD panel controller

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Date:   Tue, 2 May 2023 09:15:25 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Artur Weber <aweber.kernel@...il.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     Sam Ravnborg <sam@...nborg.org>, David Airlie <airlied@...il.com>,
        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, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v4 1/3] dt-bindings: display: panel: Add Samsung S6D7AA0
 LCD panel controller

On 01/05/2023 20:51, Artur Weber wrote:
> Add bindings for the S6D7AA0 LCD panel controller, including the
> S6D7AA0-LSL080AL02 panel used in the Samsung Galaxy Tab 3 8.0 family
> of tablets, and the S6D7AA0-LSL080AL03 and S6D7AA0-LTL101AT01 panels
> used in the Samsung Galaxy Tab A 8.0 and 9.7 2015.
> 
> Signed-off-by: Artur Weber <aweber.kernel@...il.com>
> ---
> Changed in v2:
>  - Updated commit message
>  - Applied suggestions from Krzysztof Kozlowski

What have changed?

> Changed in v3:
>  - Correctly applied suggestions

What have changed?

> Changed in v4:
>  - Added LSL080AL03, LTL101AT01 compatibles
>  - Added description to reset-gpios
>  - Added vmipi-supply, renamed enable-supply to power-supply
> ---
>  .../display/panel/samsung,s6d7aa0.yaml        | 68 +++++++++++++++++++
>  1 file changed, 68 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml b/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
> new file mode 100644
> index 000000000000..918f62a78ecd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/samsung,s6d7aa0.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung S6D7AA0 MIPI-DSI LCD panel controller
> +
> +maintainers:
> +  - Artur Weber <aweber.kernel@...il.com>
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      # 1280x800 LSL080AL02 panel
> +      - samsung,s6d7aa0-lsl080al02

lsl080al02 is model number also coming from Samsung? I am afraid this
concatenated two compatibles into one...

> +      # 1024x768 LSL080AL03 panel
> +      - samsung,s6d7aa0-lsl080al03
> +      # 1024x768 LTL101AT01 panel
> +      - samsung,s6d7aa0-ltl101at01
> +
> +  reg: true
> +
> +  backlight:> +    description: |

If there is going to be new version:
Do not need '|' unless you need to preserve formatting.

> +      Backlight to use for the panel. If this property is set on panels
> +      that have DSI-based backlight control (LSL080AL03 and LTL101AT01),
> +      it overrides the DSI-based backlight.
> +
> +  reset-gpios:
> +    description: Reset GPIO pin, usually GPIO_ACTIVE_LOW.
> +
> +  power-supply:
> +    description: |

Do not need '|' unless you need to preserve formatting.

> +      Main power supply for the panel; the exact voltage differs between
> +      panels, a


Best regards,
Krzysztof