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 <p.zabel@xxxxxxxxxxxxxx>
---
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..4e3eb611db48 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, 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
