linux-kernel - Re: [PATCH] [RESEND] drm: fb_helper: fix CONFIG

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Date:   Wed, 27 Oct 2021 16:05:08 +0300
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Daniel Vetter <daniel@...ll.ch>, Kees Cook <keescook@...omium.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>, Arnd Bergmann <arnd@...db.de>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Javier Martinez Canillas <javierm@...hat.com>
Subject: Re: [PATCH] [RESEND] drm: fb_helper: fix CONFIG_FB dependency

On Wed, 27 Oct 2021, Arnd Bergmann <arnd@...nel.org> wrote:
> On a related note, I did manage to sort out the backlight dependency issue
> (intel_panel.c:(.text+0x2f58): undefined reference to
> `backlight_device_register'),
> but haven't sent that one again yet, but I can if you like. This one changes
> DRM_I915 and all of drivers/video/fbdev from 'select BACKLIGHT_CLASS_DEVICE'
> to 'depends on', which I think moves everything into broadly the right
> direction.
>
> Let me know if you would like me to send those now, or have a look at the
> top 3 patches in [1] if you are interested. This has passed a few
> thousand randconfig
> builds and should not depend on additional patches.

FWIW,

Acked-by: Jani Nikula <jani.nikula@...el.com>

on the patches. I think I've sent patches before to do the same change
from "select" to "depends on", but they went nowhere. IIRC the
opposition was that people wanted to be able to find and enable their
driver in menuconfig without first having to enable
BACKLIGHT_CLASS_DEVICE.

BR,
Jani.



>
>         Arnd
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=randconfig-5.16-next

-- 
Jani Nikula, Intel Open Source Graphics Center