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 <rdun...@infradead.org>
Suggested-by: Arnd Bergmann <a...@arndb.de>
Cc: Masahiro Yamada <masahi...@kernel.org>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Michal Suchánek <msucha...@suse.de>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Helge Deller <del...@gmx.de>
Cc: linux-fb...@vger.kernel.org
Cc: dri-de...@lists.freedesktop.org

Acked-by: Thomas Zimmermann <tzimmerm...@suse.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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