1 files changed, 12 insertions, 0 deletions

diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 973402d6effe..31e5b97c2e89 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -48,6 +48,18 @@ struct drm_fb_helper_surface_size {
         u32 surface_depth;
 };
 
+/**
+ * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
+ * @gamma_set: - Set the given gamma lut register on the given crtc.
+ * @gamma_get: - Read the given gamma lut register on the given crtc, used to
+ *               save the current lut when force-restoring the fbdev for e.g.
+ *               kdbg.
+ * @fb_probe: - Driver callback to allocate and initialize the fbdev info
+ *              structure. Futhermore it also needs to allocate the drm
+ *              framebuffer used to back the fbdev.
+ *
+ * Driver callbacks used by the fbdev emulation helper library.
+ */
 struct drm_fb_helper_funcs {
         void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
                           u16 blue, int regno);