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fbdev/sm501fb: Initialize fb_ops to fbdev I/O-memory helpers 

Initialize each 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/20230927074722.6197-37-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-09-27 09:27:09 +02:00
parent 3fa0ee772b
commit 30543d363d
2 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/video/fbdev/Kconfig
View File

@ -1667,6 +1667,7 @@ config FB_SM501
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_IOMEM_FOPS
help
Frame buffer driver for the CRT and LCD controllers in the Silicon
Motion SM501.

4
drivers/video/fbdev/sm501fb.c
View File

@ -1452,6 +1452,7 @@ static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rec
static struct fb_ops sm501fb_ops_crt = {
.owner = THIS_MODULE,
__FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_check_var = sm501fb_check_var_crt,
.fb_set_par = sm501fb_set_par_crt,
.fb_blank = sm501fb_blank_crt,
@ -1462,10 +1463,12 @@ static struct fb_ops sm501fb_ops_crt = {
.fb_copyarea = sm501fb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_sync = sm501fb_sync,
__FB_DEFAULT_IOMEM_OPS_MMAP,
};
static struct fb_ops sm501fb_ops_pnl = {
.owner = THIS_MODULE,
__FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_check_var = sm501fb_check_var_pnl,
.fb_set_par = sm501fb_set_par_pnl,
.fb_pan_display = sm501fb_pan_pnl,
@ -1476,6 +1479,7 @@ static struct fb_ops sm501fb_ops_pnl = {
.fb_copyarea = sm501fb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_sync = sm501fb_sync,
__FB_DEFAULT_IOMEM_OPS_MMAP,
};
/* sm501_init_cursor