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fbdev/sm712fb: 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>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Teddy Wang <teddy.wang@siliconmotion.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230927074722.6197-38-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-09-27 09:27:10 +02:00
parent 30543d363d
commit 586132cf1d
2 changed files with 2 additions and 3 deletions
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4
drivers/video/fbdev/Kconfig
View file

@ -1938,9 +1938,7 @@ config FB_SSD1307
config FB_SM712
tristate "Silicon Motion SM712 framebuffer support"
depends on FB && PCI
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_IOMEM_HELPERS
select VIDEO_NOMODESET
help
Frame buffer driver for the Silicon Motion SM710, SM712, SM721

1
drivers/video/fbdev/sm712fb.c
View file

@ -1347,6 +1347,7 @@ static int smtc_set_par(struct fb_info *info)
static const struct fb_ops smtcfb_ops = {
.owner = THIS_MODULE,
FB_DEFAULT_IOMEM_OPS,
.fb_check_var = smtc_check_var,
.fb_set_par = smtc_set_par,
.fb_setcolreg = smtc_setcolreg,