From: Thomas Zimmermann Date: Fri, 7 Jul 2023 08:31:52 +0000 (+0200) Subject: fbdev: Add fb_ops init macros for framebuffers in DMA-able memory X-Git-Tag: v6.6.17~3937^2~21^2~16 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6f0f6941624d6ded57d362e47e07f8ffe77fa394;p=platform%2Fkernel%2Flinux-rpi.git 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 Reviewed-by: Javier Martinez Canillas Acked-by: Maxime Ripard Cc: Helge Deller Link: https://patchwork.freedesktop.org/patch/msgid/20230707083422.18691-2-tzimmermann@suse.de --- diff --git a/drivers/video/fbdev/core/Kconfig b/drivers/video/fbdev/core/Kconfig index 528e4dd..8543438 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 43458f5..cb23f7d 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);