diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-07-07 10:31:52 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-07-24 20:14:29 +0200 |
| commit | 6f0f6941624d6ded57d362e47e07f8ffe77fa394 (patch) | |
| tree | 566e8360bca0cc906d5845c94c71ef128b164a54 | |
| parent | e6fa4816437902b195578fb64bc94600f0728f21 (diff) | |
fbdev: Add fb_ops init macros for framebuffers in DMA-able memory
Add initializer macros for struct fb_ops for framebuffers in DMA-able
memory areas. Also add a corresponding Kconfig token. As of now, this
is equivalent to system framebuffers and mostly useful for labeling
drivers correctly.
A later patch may add a generic DMA-specific mmap operation. Linux
offers a number of dma_mmap_*() helpers for different use cases.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230707083422.18691-2-tzimmermann@suse.de
| -rw-r--r-- | drivers/video/fbdev/core/Kconfig | 8 | ||||
| -rw-r--r-- | include/linux/fb.h | 13 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/Kconfig b/drivers/video/fbdev/core/Kconfig index 528e4dd2199c..85434381b6c6 100644 --- a/drivers/video/fbdev/core/Kconfig +++ b/drivers/video/fbdev/core/Kconfig @@ -136,6 +136,14 @@ config FB_DEFERRED_IO bool depends on FB_CORE +config FB_DMA_HELPERS + bool + depends on FB_CORE + select FB_SYS_COPYAREA + select FB_SYS_FILLRECT + select FB_SYS_FOPS + select FB_SYS_IMAGEBLIT + config FB_IO_HELPERS bool depends on FB_CORE diff --git a/include/linux/fb.h b/include/linux/fb.h index 43458f582f35..cb23f7d7df10 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -591,6 +591,19 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, __FB_DEFAULT_SYS_OPS_DRAW, \ __FB_DEFAULT_SYS_OPS_MMAP +/* + * Helpers for framebuffers in DMA-able memory + */ + +#define __FB_DEFAULT_DMA_OPS_RDWR \ + .fb_read = fb_sys_read, \ + .fb_write = fb_sys_write + +#define __FB_DEFAULT_DMA_OPS_DRAW \ + .fb_fillrect = sys_fillrect, \ + .fb_copyarea = sys_copyarea, \ + .fb_imageblit = sys_imageblit + /* drivers/video/fbmem.c */ extern int register_framebuffer(struct fb_info *fb_info); extern void unregister_framebuffer(struct fb_info *fb_info); |