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From: Arnd Bergmann <arnd@kernel.org>
To: Karol Herbst <kherbst@redhat.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Lyude Paul <lyude@redhat.com>, Ben Skeggs <bskeggs@redhat.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Daniel Vetter <daniel@ffwll.ch>,
	ML nouveau <nouveau@lists.freedesktop.org>,
	dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH] depend on BACKLIGHT_CLASS_DEVICE for more devices
Date: Thu, 5 Aug 2021 08:50:41 +0200	[thread overview]
Message-ID: <CAK8P3a1rAr0BH6cNLkhES+81x2hWW31RTLZkHLDJYK-r8+x6Gg@mail.gmail.com> (raw)
In-Reply-To: <CACO55tsj_dgo8NENArCQ_=qcuJoMPg9k-gfkWxZ_8FCQUOTY1A@mail.gmail.com>

On Thu, Aug 5, 2021 at 12:01 AM Karol Herbst <kherbst@redhat.com> wrote:
>
> On Wed, Aug 4, 2021 at 11:10 PM Arnd Bergmann <arnd@kernel.org> wrote:
> >
> > On Wed, Aug 4, 2021 at 8:59 PM Karol Herbst <kherbst@redhat.com> wrote:
> > > On Wed, Aug 4, 2021 at 4:43 PM Karol Herbst <kherbst@redhat.com> wrote:
> > > > On Wed, Aug 4, 2021 at 4:19 PM Arnd Bergmann <arnd@kernel.org> wrote:
> > > > > On Wed, Aug 4, 2021 at 4:10 PM Karol Herbst <kherbst@redhat.com> wrote:
> > > > > >
> > > > > > playing around a little bit with this, I think the original "select
> > > > > > BACKLIGHT_CLASS_DEVICE" is fine. Atm we kind of have this weird mix of
> > > > > > drivers selecting and others depending on it. We could of course convert
> > > > > > everything over to depend, and break those cycling dependency issues with
> > > > > > this.
> > > > > >
> > > > > > Anyway this change on top of my initial patch is enough to make Kconfig
> > > > > > happy and has the advantage of not having to mess with the deps of nouveau
> > > > > > too much.
> > > > >
> > > > > Looks good to me. We'd probably want to make the BACKLIGHT_CLASS_DEVICE
> > > > > option itself 'default FB || DRM' though, to ensure that defconfigs
> > > > > keep working.
> > > > >
> > > >
> > > > okay cool. Will send out a proper updated patch series soonish.
> > > >
> > >
> > > mhh, actually that breaks drivers selecting FB_BACKLIGHT as now
> > > BACKLIGHT_CLASS_DEVICE might be disabled :(
> >
> > Are you sure? It should already be the case that any driver that selects
> > FB_BACKLIGHT either 'depends on BACKLIGHT_CLASS_DEVICE'
> > or 'select BACKLIGHT_CLASS_DEVICE'.
> >
> none of the fb drivers seem to do that.

Ah, right, I see now that my randconfig series has a couple of patches
applied that deal with other random failures, including this one:

https://patchwork.kernel.org/project/linux-fbdev/patch/20200417155553.675905-8-arnd@arndb.de/

Part of the series went in (through different ways) now, but this one
never did.

      Arnd

  reply	other threads:[~2021-08-05  6:51 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-23 22:46 [PATCH] nouveau: make backlight support non optional Karol Herbst
2021-07-24  6:55 ` Arnd Bergmann
2021-07-24  9:54   ` Karol Herbst
2021-07-24 11:56     ` Arnd Bergmann
2021-07-24 12:10       ` Karol Herbst
2021-07-24 12:51         ` Karol Herbst
2021-07-24 14:04           ` Arnd Bergmann
2021-07-24 14:13             ` Karol Herbst
2021-07-24 14:58               ` Arnd Bergmann
2021-08-04 14:10                 ` [PATCH] depend on BACKLIGHT_CLASS_DEVICE for more devices Karol Herbst
2021-08-04 14:19                   ` Arnd Bergmann
2021-08-04 14:43                     ` Karol Herbst
2021-08-04 18:59                       ` Karol Herbst
2021-08-04 21:09                         ` Arnd Bergmann
2021-08-04 22:01                           ` Karol Herbst
2021-08-05  6:50                             ` Arnd Bergmann [this message]
2021-08-09 13:20                 ` [PATCH] nouveau: make backlight support non optional Jani Nikula
2021-08-09 13:30                   ` Arnd Bergmann

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