[PATCH 01/10] fbdev: Add fb_ops init macros for framebuffers in DMA-able memory
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: 2023-07-04 16:02:16
Also in:
dri-devel, linux-fbdev, linux-samsung-soc, linux-tegra
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
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> Cc: Helge Deller <deller@gmx.de> --- drivers/video/fbdev/Kconfig | 8 ++++++++ include/linux/fb.h | 13 +++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index cecf15418632..f14229757311 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig@@ -168,6 +168,14 @@ config FB_DEFERRED_IO bool depends on FB +config FB_DMA_HELPERS + bool + depends on FB + select FB_SYS_COPYAREA + select FB_SYS_FILLRECT + select FB_SYS_FOPS + select FB_SYS_IMAGEBLIT + config FB_IO_HELPERS bool depends on FB
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1d5c13f34b09..1191a78c5289 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h@@ -594,6 +594,19 @@ 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);
--
2.41.0
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