linux-kernel - Re: [PATCH v1 1/2] dt-bindings: display: bridge: sn65dsi83: Add DSI video mode

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Message-ID: <CAMty3ZAQPEnCgj9r+tsuqiOzRzHPnKSEXcDqE7LKHH16Zu2Wvw@mail.gmail.com>
Date:   Thu, 30 Mar 2023 19:56:26 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Francesco Dolcini <francesco@...cini.it>
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        dri-devel@...ts.freedesktop.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marek Vasut <marex@...x.de>, devicetree@...r.kernel.org,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] dt-bindings: display: bridge: sn65dsi83: Add DSI
 video mode

On Thu, Mar 30, 2023 at 3:48 PM Francesco Dolcini <francesco@...cini.it> wrote:
>
> From: Francesco Dolcini <francesco.dolcini@...adex.com>
>
> SN65DSI8[34] device supports burst video mode and non-burst video mode
> with sync events or with sync pulses packet transmission as described in
> the DSI specification.
>
> Add property to select the expected mode, this allows for example to
> select a mode that is compatible with the DSI host interface.
>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> ---
>  .../devicetree/bindings/display/bridge/ti,sn65dsi83.yaml  | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> index 48a97bb3e2e0..ebee16726b02 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> @@ -35,6 +35,14 @@ properties:
>    vcc-supply:
>      description: A 1.8V power supply (see regulator/regulator.yaml).
>
> +  dsi-video-mode:
> +    description: |
> +      0 - burst-mode
> +      1 - non-burst with sync event
> +      2 - non-burst with sync pulse
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [0, 1, 2]

I'm thinking this can go to dsi common code since the video modes are
common across all controllers and make the core initialize the default
and update if any sink devices are willing to change the modes. Sound
like a big move but worth useful.

Thanks,
Jagan.