linux-kernel - Re: [PATCH v2 6/9] drm/panel: Add Netron DY E231732

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Message-ID: <20180503130958.gh6mgbhon3uaha75@flea>
Date:   Thu, 3 May 2018 15:09:58 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Paul Kocialkowski <contact@...lk.fr>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 6/9] drm/panel: Add Netron DY E231732

Hi,

On Wed, May 02, 2018 at 09:20:30AM +0200, Paul Kocialkowski wrote:
> Le vendredi 09 septembre 2016 à 16:35 +0200, Maxime Ripard a écrit :
> > On Wed, Sep 07, 2016 at 12:01:56AM +0800, Chen-Yu Tsai wrote:
> > > Hi,
> > > 
> > > On Tue, Sep 6, 2016 at 10:46 PM, Maxime Ripard
> > > <maxime.ripard@...e-electrons.com> wrote:
> > > > The E231732 is a 7" panel with a resolution of 800x480.
> > > 
> > > From what I could make out of an archived version of Netron's
> > > website
> > > (it's unreachable from my place), they are a manufacturer of printed
> > > ribbon cables, not LCD panels. This is probably a no-go.
> > 
> > I don't know. I haven't been able to find any website for Netron DY,
> > however, googling the part number I used find numerous matches on ebay
> > and alibaba.
> 
> While starting a port for the A13-based TZX-Q8-713B7 tablet, it appears
> that my LCD cable also has the Netron-DY E231732 marking, but is
> definitely different from the one on the SinA33. So I think Chen-Yu's
> comment was founded and "Netron DY E231732" does not reflect the panel
> name.
> 
> Here are some details regarding the LCD cable on both devices:
> 
> The SinA33 has a 1024x600 panel with the following markings:
> 7300101463
> E231732
> NETRON-DY <> 1
> 94V-0\1310
> 
> The TZX-Q8-713B7 has a 800x480 panel with the following markings:
> 7300101448
> E231732
> NETRON-DY <> 2
> 94V-0\1249
> 
> So it seems that the distinctive part of the name is
> 7300101463/7300101448.
> 
> Also, it seems that various online shops list the panels with a name
> like "E231732 7300101463". So maybe we could change the bindings to
> have:
> 
> - netron-dy,e231732-7300101463
> - netron-dy,e231732-7300101448
> 
> What do you think? Does that make sense?
> 
> We should probably also fallback netron-dy,e231732 to the sina33's panel
> in order to avoid breaking the ABI.

That's kind of unfortunate, and maybe the netron part is just the
vendor of the flex cable.

In your case, I guess the best work around this would be to call it
TZX-Q8-713B7-panel, if it's shipped with a single resolution.

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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