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fbdev/vermilionfb: 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/20230927074722.6197-44-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2023-09-27 09:27:16 +02:00
parent 5e5943fef2
commit c745754244
2 changed files with 3 additions and 6 deletions
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drivers/video/fbdev/Kconfig
+1 -3
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@@ -849,10 +849,8 @@ config FB_I810_I2C
config FB_LE80578
tristate "Intel LE80578 (Vermilion) support"
depends on FB && PCI && X86
select FB_IOMEM_HELPERS
select FB_MODE_HELPERS
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select VIDEO_NOMODESET
help
This driver supports the LE80578 (Vermilion Range) chipset