linux-kernel - Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

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Message-Id: <0324FA0E-F06A-41F1-84AD-5BC72F6B6BFF@goldelico.com>
Date:   Fri, 1 Dec 2017 10:48:38 +0100
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Tomi Valkeinen <tomi.valkeinen@...com>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Benoît Cousson <bcousson@...libre.com>,
        Russell King <linux@...linux.org.uk>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Julia Lawall <Julia.Lawall@...6.fr>,
        Sean Paul <seanpaul@...omium.org>,
        dri-devel@...ts.freedesktop.org, DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-fbdev@...r.kernel.org,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>, kernel@...a-handheld.com
Subject: Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

Hi Tomi,

> Am 01.12.2017 um 09:13 schrieb Tomi Valkeinen <tomi.valkeinen@...com>:
> 
> On 01/12/17 00:06, Sebastian Reichel wrote:
> 
>>>>> How about let's call it a "typo fix" then? :)
>>>> 
>>>> Well, it is not really a typo.
>>> 
>>> Well what if the stable people pick it into earlier stable series
>>> based on the word fix in the subject? That has happened before.
>>> 
>>> I suggest you update the dts patches to use wording like
>>> "update compatible to use new naming" or something similar.
>> 
>> Patch 4/4 is a Fix and should be applied to stable trees. "omapdss,"
>> prefix was never supposed to be in the DTS files, is not supposed to
>> be in there now and will break some time in the future.
>> 
>> Explanation: The early init of omapdss adds the prefix at runtime,
>> so that the binding can use generic properties and the kernel can
>> use omapdss specific drivers until the generic ones can be used
> 
> This is true, but the extra "omapdss" does not cause any issues at the
> moment, and the time when it causes issues is still many kernel versions
> in the future.
> 
> But, yes, thinking about this, I agree, it's better to pick this one
> separately as a fix (after rebasing it on top of current maineline so
> that it doesn't depend on the toppoly name change), and leaving the
> toppoly->tpo change as a cleanup.

Just a note: there is no toppoly->tpo change for *this* panel and
Pandora board. Just omapdss removal.

The GTA04 needs a toppoly->tpo change but no omapdss, removal.

So they solve different problems and are independent of each other.

GTA04: change vendor string
Pandora: remove omapdss, prefix

BR and thanks,
Nikolaus