linux-kernel - Re: [PATCH v5 1/7] dt-bindings: Add panel-timing subnode to simple-panel

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Message-ID: <20190408103240.GF6644@ulmo>
Date:   Mon, 8 Apr 2019 12:32:40 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Sean Paul <seanpaul@...omium.org>,
        linux-rockchip@...ts.infradead.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dri-devel@...ts.freedesktop.org,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Enric Balletbò <enric.balletbo@...labora.com>,
        Rob Herring <robh+dt@...nel.org>, mka@...omium.org,
        Eric Anholt <eric@...olt.net>,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Stéphane Marchesin <marcheu@...omium.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v5 1/7] dt-bindings: Add panel-timing subnode to
 simple-panel

On Mon, Apr 01, 2019 at 10:17:18AM -0700, Douglas Anderson wrote:
> From: Sean Paul <seanpaul@...omium.org>
> 
> This patch adds a new subnode to simple-panel allowing us to override
> the typical timing expressed in the panel's display_timing.
> 
> Changes in v2:
>  - Split out the binding into a new patch (Rob)
>  - display-timings is a new section (Rob)
>  - Use the full display-timings subnode instead of picking the timing
>    out (Rob/Thierry)
> Changes in v3:
>  - Go back to using the timing subnode directly, but rename to
>    panel-timing (Rob)
> Changes in v4:
>  - Simplify desc. for when override should be used (Thierry/Laurent)
>  - Removed Rob H review since it's been a year and wording changed
> Changes in v5:
>  - Removed bit about OS may ignore (Rob/Ezequiel)
> 
> Cc: Doug Anderson <dianders@...omium.org>
> Cc: Eric Anholt <eric@...olt.net>
> Cc: Heiko Stuebner <heiko@...ech.de>
> Cc: Jeffy Chen <jeffy.chen@...k-chips.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Stéphane Marchesin <marcheu@...omium.org>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: devicetree@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org
> Cc: linux-rockchip@...ts.infradead.org
> Signed-off-by: Sean Paul <seanpaul@...omium.org>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
>  .../bindings/display/panel/simple-panel.txt   | 22 +++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
> index b2b872c710f2..93882268c0b9 100644
> --- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt
> +++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
> @@ -15,6 +15,16 @@ Optional properties:
>    (hot plug detect) signal, but the signal isn't hooked up so we should
>    hardcode the max delay from the panel spec when powering up the panel.
>  
> +panel-timing subnode

Is there any reason why we need the panel- prefix? This is already part
of a panel definition, so it's completely redundant. Why not just name
the subnode "timing"?

Thierry

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