Ast hardware scans out the primary plane from video memory, which
is in I/O-memory space. Hence init the damage handler's iosys_map
pointer as I/O memory.
Not all platforms support accessing I/O memory as system memory,
although it's usually not a problem in ast's x86-based systems.
The error report is at [1].
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Fixes: f2fa5a99ca81 ("drm/ast: Convert ast to SHMEM")
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Link: https://lore.kernel.org/lkml/202212170111.eInM0unS-lkp@xxxxxxxxx/T/#u # 1
---
drivers/gpu/drm/ast/ast_mode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index c7443317c747..e82e9a8d85e5 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -636,7 +636,7 @@ static void ast_handle_damage(struct ast_plane *ast_plane, struct iosys_map *src
struct drm_framebuffer *fb,
const struct drm_rect *clip)
{
- struct iosys_map dst = IOSYS_MAP_INIT_VADDR(ast_plane->vaddr);
+ struct iosys_map dst = IOSYS_MAP_INIT_VADDR_IOMEM(ast_plane->vaddr);
iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, clip));
drm_fb_memcpy(&dst, fb->pitches, src, fb, clip);
--
2.38.1
