diff options
Diffstat (limited to 'drivers/gpu/drm/drm_gem_framebuffer_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_gem_framebuffer_helper.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 5731a6a1dfa5..3c75d79dbb65 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -315,19 +315,25 @@ EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); * drm_gem_fb_vmap - maps all framebuffer BOs into kernel address space * @fb: the framebuffer * @map: returns the mapping's address for each BO + * @data: returns the data address for each BO, can be NULL * * This function maps all buffer objects of the given framebuffer into * kernel address space and stores them in struct dma_buf_map. If the * mapping operation fails for one of the BOs, the function unmaps the * already established mappings automatically. * + * Callers that want to access a BO's stored data should pass @data. + * The argument returns the addresses of the data stored in each BO. This + * is different from @map if the framebuffer's offsets field is non-zero. + * * See drm_gem_fb_vunmap() for unmapping. * * Returns: * 0 on success, or a negative errno code otherwise. */ int drm_gem_fb_vmap(struct drm_framebuffer *fb, - struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]) + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES], + struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]) { struct drm_gem_object *obj; unsigned int i; @@ -344,6 +350,15 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, goto err_drm_gem_vunmap; } + if (data) { + for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) { + memcpy(&data[i], &map[i], sizeof(data[i])); + if (dma_buf_map_is_null(&data[i])) + continue; + dma_buf_map_incr(&data[i], fb->offsets[i]); + } + } + return 0; err_drm_gem_vunmap: |