Re: [PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

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Hi Liu Ying

On Wed, Nov 04, 2020 at 04:03:37PM +0800, Liu Ying wrote:
> Some simple panels have dual LVDS interfaces which receive even and odd
> pixels respectively, like 'nlt,nl192108ac18-02d' and 'koe,tx26d202vm0bwa'.
> So, let's allow optional 'ports' property so that pixel order can be got
> via drm_of_lvds_get_dual_link_pixel_order() if it's child nodes 'port@0'
> and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-odd-pixels'
> properties respectively.

A panel with dual LVDS interfaces is no longer in the "simple" category.
The panel-simple binding shall be limited to the simple pnales only.

This is also why we have for example panel-simple-dsi binding.

Please consider either a binding dedicated for the dual port displays or
a dedicated binding for the specific panel.

I trust that if other readers of this mail disagrees with this
recommendation that they will speak up.

	Sam

> 
> Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
> ---
>  Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> index f9750b0..5ccb22b 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> @@ -288,6 +288,7 @@ properties:
>    backlight: true
>    enable-gpios: true
>    port: true
> +  ports: true
>    power-supply: true
>  
>  additionalProperties: false
> -- 
> 2.7.4
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