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Date:   Fri, 19 Nov 2021 12:15:45 +0100
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Jiri Slaby <jirislaby@kernel.org>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        "Acked-by: Jani Nikula" <jani.nikula@intel.com>,
        Javier Martinez Canillas <javierm@redhat.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Sasha Levin <sashal@kernel.org>
Subject: Re: [PATCH 5.15 808/917] drm: fb_helper: improve CONFIG_FB dependency
Message-ID: <YZeHYcPsjUMJ6x+q@kroah.com>
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On Fri, Nov 19, 2021 at 08:50:05AM +0100, Jiri Slaby wrote:
> On 15. 11. 21, 18:05, Greg Kroah-Hartman wrote:
> > From: Arnd Bergmann <arnd@arndb.de>
> > 
> > [ Upstream commit 9d6366e743f37d36ef69347924ead7bcc596076e ]
> 
> Hi,
> 
> this breaks build on openSUSE's armv7hl config:
> $ wget -O .config https://raw.githubusercontent.com/openSUSE/kernel-source/stable/config/armv7hl/default
> $ make -j168 CROSS_COMPILE=arm-suse-linux-gnueabi- ARCH=arm vmlinux
> ...
>   LD      .tmp_vmlinux.btf
> arm-suse-linux-gnueabi-ld: drivers/gpu/drm/panel/panel-simple.o: in function
> `panel_simple_probe':
> drivers/gpu/drm/panel/panel-simple.c:803: undefined reference to
> `drm_panel_dp_aux_backlight'
> $ grep -E 'CONFIG_(DRM|FB|DRM_KMS_HELPER|DRM_FBDEV_EMULATION)\>' .config
> CONFIG_DRM=y
> CONFIG_DRM_KMS_HELPER=m
> CONFIG_DRM_FBDEV_EMULATION=y
> CONFIG_FB=y
> 
> 5.16-rc1 builds just fine -- investigating why…

Ok, will go revert that, thanks.

greg k-h