linux-kernel - Re: [PATCH] drm/drm_panel: fix export of drm_panel_of

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Message-ID: <CAK8P3a1TmfqXA3gK0YwbPBSeydEs=b8Tae=JWvju4OZaSMUscA@mail.gmail.com>
Date:   Wed, 8 Jan 2020 21:17:32 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Jani Nikula <jani.nikula@...el.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sean Paul <sean@...rly.run>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Emil Velikov <emil.velikov@...labora.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/drm_panel: fix export of drm_panel_of_backlight, try #3

On Wed, Jan 8, 2020 at 5:46 PM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Arnd.
>
> > > > All of this is just another hack until the backlight config usage is
> > > > fixed for good. Do we really want to make this the example to copy paste
> > > > wherever we hit the issue next?
> > > >
> > > > I'm not naking, but I'm not acking either.
> > >
> > > I will try to take a look at your old BACKLIGHT_CLASS_DEVICE patch this
> > > weekend. I think we need that one fixed - and then we can have this mess
> > > with "drm_panel_of_backlight" fixed in the right way.
> >
> > I had also attempted to fix the larger mess around 'select' statements in DRM/FB
> > around BACKLIGHT_CLASS_DEVICE  several times in the past, and even at
> > some point sent a patch that was acked but never merged and later broke because
> > of other changes.
>
> Any chance you have the patch around or can dig up a pointer?
> My google foo did not turn up anything.

I found it now:
https://lore.kernel.org/lkml/20170726135312.2214309-1-arnd@arndb.de/

      Arnd