diff options
| author | Thomas Zimmermann <[email protected]> | 2023-04-28 14:24:51 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <[email protected]> | 2023-05-08 15:28:34 +0200 |
| commit | 6121cd9ef911432b14c2a17aefaf8cd2f3cfcdff (patch) | |
| tree | 6db707c245921b6460cbda1c20f22e1a737f7f59 /include | |
| parent | 3f8974f68f408f4983443b745a3cf95b06112469 (diff) | |
fbdev: Move I/O read and write code into helper functions
Move the existing I/O read and write code for I/O memory into
the new helpers fb_cfb_read() and fb_cfb_write(). Make them the
default fp_ops. No functional changes.
In the near term, the new functions will be useful to the DRM
subsystem, which currently provides it's own implementation. It
can then use the shared code. In the longer term, it might make
sense to revise the I/O helper's default status and make them
opt-in by the driver. Systems that don't use them would not
contain the code any longer.
v2:
* add detailed commit message (Javier)
* rename fb_cfb_() to fb_io_() (Geert)
* add fixes that got lost while moving the code (Geert)
Signed-off-by: Thomas Zimmermann <[email protected]>
Tested-by: Sui Jingfeng <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Acked-by: Helge Deller <[email protected]>
Reviewed-by: Sam Ravnborg <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fb.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h index 08cb47da71f8..ec978a4969a9 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -576,9 +576,19 @@ struct fb_info { extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); extern int fb_blank(struct fb_info *info, int blank); + +/* + * Drawing operations where framebuffer is in I/O memory + */ + extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); +extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos); +extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos); + /* * Drawing operations where framebuffer is in system RAM */ |