linux-kernel - Re: [PATCH] fbdev: make offb driver tristate

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Date:   Sat, 10 Dec 2022 17:35:06 +0100
From:   Helge Deller <deller@....de>
To:     Thomas Zimmermann <tzimmermann@...e.de>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-kernel@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Suchánek <msuchanek@...e.de>,
        linuxppc-dev@...ts.ozlabs.org, Daniel Vetter <daniel@...ll.ch>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] fbdev: make offb driver tristate

On 11/26/22 14:40, Thomas Zimmermann wrote:
> Am 26.11.22 um 01:04 schrieb Randy Dunlap:
>> Make the offb (Open Firmware frame buffer) driver tristate,
>> i.e., so that it can be built as a loadable module.
>>
>> However, it still depends on the setting of DRM_OFDRM
>> so that both of these drivers cannot be builtin at the same time
>> nor can one be builtin and the other one a loadable module.
>>
>> Build-tested successfully with all combination of DRM_OFDRM and FB_OF.
>>
>> This fixes a build issue that Michal reported when FB_OF=y and
>> DRM_OFDRM=m:
>>
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58): undefined reference to `cfb_fillrect'
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60): undefined reference to `cfb_copyarea'
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68): undefined reference to `cfb_imageblit'
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Suggested-by: Arnd Bergmann <arnd@...db.de>
>> Cc: Masahiro Yamada <masahiroy@...nel.org>
>> Cc: Thomas Zimmermann <tzimmermann@...e.de>
>> Cc: Michal Suchánek <msuchanek@...e.de>
>> Cc: linuxppc-dev@...ts.ozlabs.org
>> Cc: Daniel Vetter <daniel@...ll.ch>
>> Cc: Helge Deller <deller@....de>
>> Cc: linux-fbdev@...r.kernel.org
>> Cc: dri-devel@...ts.freedesktop.org
>
> Acked-by: Thomas Zimmermann <tzimmermann@...e.de>

applied.

Thanks!
Helge



>>
>> ---
>>   drivers/video/fbdev/Kconfig |    4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
>> --- a/drivers/video/fbdev/Kconfig
>> +++ b/drivers/video/fbdev/Kconfig
>> @@ -456,8 +456,8 @@ config FB_ATARI
>>         chipset found in Ataris.
>>   config FB_OF
>> -    bool "Open Firmware frame buffer device support"
>> -    depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
>> +    tristate "Open Firmware frame buffer device support"
>> +    depends on FB && PPC && (!PPC_PSERIES || PCI)
>>       depends on !DRM_OFDRM
>>       select APERTURE_HELPERS
>>       select FB_CFB_FILLRECT
>