Commit 24dc4f4c authored by Thomas Zimmermann's avatar Thomas Zimmermann
Browse files

drm/fb-helper: Support smem_len in deferred I/O 



The size of the framebuffer can either be stored in screen_info or
smem_len. Take both into account in the deferred I/O code.

Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarJavier Martinez Canillas <javierm@redhat.com>
Tested-by: default avatarSui Jingfeng <suijingfeng@loongson.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20230320150751.20399-5-tzimmermann@suse.de
parent 6a4fef21

drivers/gpu/drm/drm_fb_helper.c

+6 −2
Original line number Diff line number Diff line
@@ -672,7 +672,7 @@ static void drm_fb_helper_memory_range_to_clip(struct fb_info *info, off_t off, 
void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist)

{

	struct drm_fb_helper *helper = info->par;

	unsigned long start, end, min_off, max_off;

	unsigned long start, end, min_off, max_off, total_size;

	struct fb_deferred_io_pageref *pageref;

	struct drm_rect damage_area;
@@ -690,7 +690,11 @@ void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagerefli 
	 * of the screen and account for non-existing scanlines. Hence,

	 * keep the covered memory area within the screen buffer.

	 */

	max_off = min(max_off, info->screen_size);

	if (info->screen_size)

		total_size = info->screen_size;

	else

		total_size = info->fix.smem_len;

	max_off = min(max_off, total_size);



	if (min_off < max_off) {

		drm_fb_helper_memory_range_to_clip(info, min_off, max_off - min_off, &damage_area);