Commit c51b3620 authored by Thomas Zimmermann's avatar Thomas Zimmermann
Browse files

drm/fb-helper: Export helpers for marking damage areas 



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.

v4:
	* update interfaces

Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230530151228.22979-11-tzimmermann@suse.de
parent e1d49d76

drivers/gpu/drm/drm_fb_helper.c

+22 −0
Original line number Diff line number Diff line
@@ -670,6 +670,28 @@ 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 fb_info *info, off_t off, size_t len)

{

	struct drm_fb_helper *fb_helper = info->par;

	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);



/* Don't use in new code. */

void drm_fb_helper_damage_area(struct fb_info *info, u32 x, u32 y, u32 width, u32 height)

{

	struct drm_fb_helper *fb_helper = info->par;



	drm_fb_helper_damage(fb_helper, x, y, width, height);

}

EXPORT_SYMBOL(drm_fb_helper_damage_area);



/**

 * drm_fb_helper_deferred_io() - fbdev deferred_io callback function

 * @info: fb_info struct pointer

include/drm/drm_fb_helper.h

+3 −0
Original line number Diff line number Diff line
@@ -253,6 +253,9 @@ 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_range(struct fb_info *info, off_t off, size_t len);

void drm_fb_helper_damage_area(struct fb_info *info, u32 x, u32 y, u32 width, u32 height);



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,