[PATCH/RFC 07/15] dt-bindings: display: renesas: lvds: Add renesas,companion property

[Geert Uytterhoeven]

Hi Laurent,

On Thu, Mar 7, 2019 at 12:24 AM Laurent Pinchart
<laurent.pinchart+renesas at ideasonboard.com> wrote:
> Add a new optional renesas,companion property to point to the companion
> LVDS encoder. This is used to support dual-link operation where the main
> LVDS encoder splits even-numbered and odd-numbered pixels between the
> two LVDS encoders.

Note that Documentation/devicetree/bindings/usb/generic.txt already
describes a "companion" property without vendor prefix.

> The new property doesn't control the mode of operation, it only
> describes the relationship between the master and companion LVDS
> encoders.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> ---
>  .../devicetree/bindings/display/bridge/renesas,lvds.txt     | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> index 900a884ad9f5..a720dbb5de69 100644
> --- a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> @@ -45,6 +45,12 @@ OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
>
>  Each port shall have a single endpoint.
>
> +Optional properties:
> +
> +- renesas,companion : phandle to the companion LVDS encoder. This property is
> +  valid for the first LVDS encoder D3 and E3 SoCs only, and points to the

... on D3 ...

> +  second encoder to be used as a companion in dual-link mode.

Why restrict this to the first LVDS decoder, and not have a backlink in the
other node, like for USB?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds