linux-kernel - Re: [RFC PATCH v3 4/7] drm/panel: nv3052c: Add Fascontek FS035VG158 LCD display

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Message-ID: <ZRFXd3F7eit7x4aJ@titan>
Date:   Mon, 25 Sep 2023 19:48:39 +1000
From:   John Watts <contact@...kia.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     dri-devel@...ts.freedesktop.org,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        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>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Chris Morgan <macromorgan@...mail.com>,
        Jagan Teki <jagan@...eble.ai>,
        Christophe Branchereau <cbranchereau@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 4/7] drm/panel: nv3052c: Add Fascontek FS035VG158
 LCD display

On Mon, Sep 25, 2023 at 11:43:26AM +0200, Paul Cercueil wrote:
> From what I can see, you have a panel with a NV3052C chip, so the
> existing initialization sequence should already work.

It has some differences that I don't know if are important.

> The NV3052C datasheet does not give any settings for a 640x480 panel, I
> only see suggested settings for a 720x1280 vertical panel.
> 
> Unless you have a min/max range specified, the values you see in there
> are only suggestions for a working setup, that doesn't mean they are
> the only recommended ones.

The panel datasheet has these values.

> 
> Cheers,
> -Paul

John.