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fbdev/neofb: Initialize fb_ops to fbdev I/O-memory helpers

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Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230927074722.6197-24-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2023-09-27 09:26:56 +02:00
parent dc9c80b0c6
commit eb9d5c19dc
2 changed files with 4 additions and 1 deletions
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3
drivers/video/fbdev/Kconfig
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@@ -1268,10 +1268,11 @@ endif
config FB_NEOMAGIC
tristate "NeoMagic display support"
depends on FB && PCI
select FB_MODE_HELPERS
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_IOMEM_FOPS
select FB_MODE_HELPERS
select VGASTATE
select VIDEO_NOMODESET
help