Add an optional fb_damage operation that drivers may use to accumulate damage on the framebuffer until fb_flush is called. The accumulated damage can be used to support partial updates for displays with an integrated framebuffer.
Signed-off-by: Philipp Zabel <[email protected]> --- v2: make rect parameter to fb_damage const --- drivers/video/fb.c | 6 ++++++ include/fb.h | 9 +++++++++ 2 files changed, 15 insertions(+) diff --git a/drivers/video/fb.c b/drivers/video/fb.c index 44754065e7d9..6f412d62c434 100644 --- a/drivers/video/fb.c +++ b/drivers/video/fb.c @@ -43,6 +43,12 @@ static int fb_close(struct cdev *cdev) return 0; } +void fb_damage(struct fb_info *info, struct fb_rect *rect) +{ + if (info->fbops->fb_damage) + info->fbops->fb_damage(info, rect); +} + static int fb_op_flush(struct cdev *cdev) { struct fb_info *info = cdev->priv; diff --git a/include/fb.h b/include/fb.h index 15bb74b99576..88e6c0e45835 100644 --- a/include/fb.h +++ b/include/fb.h @@ -80,6 +80,13 @@ struct fb_bitfield { struct fb_info; +struct fb_rect { + u32 x1; + u32 y1; + u32 x2; + u32 y2; +}; + struct fb_ops { /* set color register */ int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, @@ -87,6 +94,7 @@ struct fb_ops { void (*fb_enable)(struct fb_info *info); void (*fb_disable)(struct fb_info *info); int (*fb_activate_var)(struct fb_info *info); + void (*fb_damage)(struct fb_info *info, const struct fb_rect *rect); void (*fb_flush)(struct fb_info *info); }; @@ -156,6 +164,7 @@ int register_framebuffer(struct fb_info *info); int fb_enable(struct fb_info *info); int fb_disable(struct fb_info *info); +void fb_damage(struct fb_info *info, struct fb_rect *rect); void fb_flush(struct fb_info *info); #define FBIOGET_SCREENINFO _IOR('F', 1, loff_t) -- 2.39.2
