[PATCH v4 11/13] drm/fb-helper: Export helpers for marking damage areas

[Sam Ravnborg]

On Wed, May 24, 2023 at 11:21:48AM +0200, Thomas Zimmermann wrote:
> 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: Thomas Zimmermann <tzimmermann at suse.de>

Assuming there is a good answer why there is no dirty check:
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>

> ---
>  drivers/gpu/drm/drm_fb_helper.c | 22 ++++++++++++++++++++++
>  include/drm/drm_fb_helper.h     |  3 +++
>  2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index f0e9549b6bd7..cb03099fd2e3 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -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
> diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
> index 72032c354a30..7d5804882be7 100644
> --- a/include/drm/drm_fb_helper.h
> +++ b/include/drm/drm_fb_helper.h
> @@ -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,
> -- 
> 2.40.1