[PATCH v3 10/12] drm/fb-helper: Export helpers for marking damage areas

[Thomas Zimmermann <tzimmermann@xxxxxxx>]

Export drm_fb_helper_damage() and drm_fb_helper_damage_range(), which
handle damage areas for fbdev emulation. This is a temporary export
that allows to move the DRM I/O helpers for fbdev into drivers. Only
fbdev-generic and i915 need them. Both will be updated to implement
damage handling by themselves and the exported functions will be removed.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
 drivers/gpu/drm/drm_fb_helper.c | 19 +++++++++++++++++--
 include/drm/drm_fb_helper.h     |  4 ++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index f0e9549b6bd7..8724e08c518b 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -625,13 +625,15 @@ static void drm_fb_helper_add_damage_clip(struct drm_fb_helper *helper, u32 x, u
 	spin_unlock_irqrestore(&helper->damage_lock, flags);
 }
 
-static void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y,
-				 u32 width, u32 height)
+/* Don't use in new code. */
+void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y,
+			  u32 width, u32 height)
 {
 	drm_fb_helper_add_damage_clip(helper, x, y, width, height);
 
 	schedule_work(&helper->damage_work);
 }
+EXPORT_SYMBOL(drm_fb_helper_damage);
 
 /*
  * Convert memory region into area of scanlines and pixels per
@@ -670,6 +672,19 @@ static void drm_fb_helper_memory_range_to_clip(struct fb_info *info, off_t off,
 	drm_rect_init(clip, x1, y1, x2 - x1, y2 - y1);
 }
 
+/* Don't use in new code. */
+void drm_fb_helper_damage_range(struct drm_fb_helper *fb_helper, off_t off, size_t len)
+{
+	struct fb_info *info = fb_helper->info;
+	struct drm_rect damage_area;
+
+	drm_fb_helper_memory_range_to_clip(info, off, len, &damage_area);
+	drm_fb_helper_damage(fb_helper, damage_area.x1, damage_area.y1,
+			     drm_rect_width(&damage_area),
+			     drm_rect_height(&damage_area));
+}
+EXPORT_SYMBOL(drm_fb_helper_damage_range);
+
 /**
  * drm_fb_helper_deferred_io() - fbdev deferred_io callback function
  * @info: fb_info struct pointer
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 72032c354a30..80c402f4e379 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -253,6 +253,10 @@ void drm_fb_helper_fill_info(struct fb_info *info,
 			     struct drm_fb_helper *fb_helper,
 			     struct drm_fb_helper_surface_size *sizes);
 
+void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y,
+			  u32 width, u32 height);
+void drm_fb_helper_damage_range(struct drm_fb_helper *helper, off_t off, size_t len);
+
 void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist);
 
 ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
-- 
2.40.1