From: Arnd Bergmann <arnd@arndb.de>

The fb_io_mmap() function is used in the file operations but
not enabled in all configurations unless FB_IOMEM_FOPS gets
selected:

ld.lld-20: error: undefined symbol: fb_io_mmap
>>> referenced by wm8505fb.c
>>>               drivers/video/fbdev/wm8505fb.o:(wm8505fb_ops) in archive vmlinux.a

Fixes: 11754a504608 ("fbdev/wm8505fb: Initialize fb_ops to fbdev I/O-memory helpers")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/video/fbdev/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 9957dde4a3f6..961d7f5bbbc2 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -1388,6 +1388,7 @@ config FB_VT8500
 config FB_WM8505
 	bool "Wondermedia WM8xxx-series frame buffer support"
 	depends on (FB = y) && HAS_IOMEM && (ARCH_VT8500 || COMPILE_TEST)
+	select FB_IOMEM_FOPS
 	select FB_SYS_FILLRECT if (!FB_WMT_GE_ROPS)
 	select FB_SYS_COPYAREA if (!FB_WMT_GE_ROPS)
 	select FB_SYS_IMAGEBLIT
-- 
2.39.5

Am 18.10.24 um 17:12 schrieb Arnd Bergmann:
> From: Arnd Bergmann <arnd@arndb.de>
>
> The fb_io_mmap() function is used in the file operations but
> not enabled in all configurations unless FB_IOMEM_FOPS gets
> selected:
>
> ld.lld-20: error: undefined symbol: fb_io_mmap
>>>> referenced by wm8505fb.c
>>>>                drivers/video/fbdev/wm8505fb.o:(wm8505fb_ops) in archive vmlinux.a
> Fixes: 11754a504608 ("fbdev/wm8505fb: Initialize fb_ops to fbdev I/O-memory helpers")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/video/fbdev/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> index 9957dde4a3f6..961d7f5bbbc2 100644
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -1388,6 +1388,7 @@ config FB_VT8500
>   config FB_WM8505
>   	bool "Wondermedia WM8xxx-series frame buffer support"
>   	depends on (FB = y) && HAS_IOMEM && (ARCH_VT8500 || COMPILE_TEST)
> +	select FB_IOMEM_FOPS
>   	select FB_SYS_FILLRECT if (!FB_WMT_GE_ROPS)
>   	select FB_SYS_COPYAREA if (!FB_WMT_GE_ROPS)
>   	select FB_SYS_IMAGEBLIT

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

On 10/18/24 17:12, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> The fb_io_mmap() function is used in the file operations but
> not enabled in all configurations unless FB_IOMEM_FOPS gets
> selected:
>
> ld.lld-20: error: undefined symbol: fb_io_mmap
>>>> referenced by wm8505fb.c
>>>>                drivers/video/fbdev/wm8505fb.o:(wm8505fb_ops) in archive vmlinux.a
>
> Fixes: 11754a504608 ("fbdev/wm8505fb: Initialize fb_ops to fbdev I/O-memory helpers")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

applied.
Thanks!
Helge