linux-kernel - Re: [PATCH 2/3] fbdev: rework backlight dependencies

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Date:   Wed, 27 Oct 2021 12:25:47 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...nel.org>, dri-devel@...ts.freedesktop.org
Cc:     linux-fbdev@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>, Miguel Ojeda <ojeda@...nel.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jens Frederich <jfrederich@...il.com>,
        Jon Nettleton <jon.nettleton@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Lars Poeschel <poeschel@...onage.de>,
        Robin van der Gracht <robin@...tonic.nl>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-staging@...ts.linux.dev
Subject: Re: [PATCH 2/3] fbdev: rework backlight dependencies

On 10/27/21 6:27 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Rather than having CONFIG_FB_BACKLIGHT select CONFIG_BACKLIGHT_CLASS_DEVICE,
> make any driver that needs it have a dependency on the class device
> being available, to prevent circular dependencies.
> 
> This is the same way that the backlight is already treated for the DRM
> subsystem.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/auxdisplay/Kconfig        |  1 +
>   drivers/macintosh/Kconfig         |  1 +
>   drivers/staging/fbtft/Kconfig     |  1 +
>   drivers/staging/olpc_dcon/Kconfig |  2 +-
>   drivers/video/fbdev/Kconfig       | 14 +++++++++++---
>   5 files changed, 15 insertions(+), 4 deletions(-)

Acked-by: Randy Dunlap <rdunlap@...raded.org>

Thanks.

-- 
~Randy