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

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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: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Sui Jingfeng <suijingfeng@loongson.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20230320150751.20399-5-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2023-03-20 16:07:47 +01:00
parent 6a4fef2181
commit 24dc4f4c2a
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/drm_fb_helper.c
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@@ -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);