Set the returned mapping address to NULL if a framebuffer plane does
not have a BO associated with it. Likewise, ignore mappings of NULL
during framebuffer unmap operations. Allows users of the functions to
perform unmap operations of certain BOs by themselfes.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
index cc4465100cc2..15b0fe3ee7b6 100644
--- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
+++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
@@ -333,8 +333,10 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FORMA
for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) {
obj = drm_gem_fb_get_obj(fb, i);
- if (!obj)
+ if (!obj) {
+ dma_buf_map_clear(&map[i]);
continue;
+ }
ret = drm_gem_vmap(obj, &map[i]);
if (ret)
goto err_drm_gem_vunmap;
@@ -373,6 +375,8 @@ void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FO
obj = drm_gem_fb_get_obj(fb, i);
if (!obj)
continue;
+ if (dma_buf_map_is_null(&map[i]))
+ continue;
drm_gem_vunmap(obj, &map[i]);
}
}
--
2.32.0
