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

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Date:   Sat, 26 Nov 2022 14:40:40 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     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>,
        Helge Deller <deller@....de>, linux-fbdev@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] fbdev: make offb driver tristate



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>

> 
> ---
>   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

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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