diff --git a/include/drm/i2c/ch7006.h b/include/drm/i2c/ch7006.h
index 8390b437a1f8..5305b9797f93 100644
--- a/include/drm/i2c/ch7006.h
+++ b/include/drm/i2c/ch7006.h
@@ -37,6 +37,7 @@
  * meaning.
  */
 struct ch7006_encoder_params {
+	/* private: FIXME: document the members */
 	enum {
 		CH7006_FORMAT_RGB16 = 0,
 		CH7006_FORMAT_YCrCb24m16,
diff --git a/include/drm/i2c/sil164.h b/include/drm/i2c/sil164.h
index 205e27384c83..ddf248693c8b 100644
--- a/include/drm/i2c/sil164.h
+++ b/include/drm/i2c/sil164.h
@@ -36,6 +36,7 @@
  * See "http://www.siliconimage.com/docs/SiI-DS-0021-E-164.pdf".
  */
 struct sil164_encoder_params {
+	/* private: FIXME: document the members */
 	enum {
 		SIL164_INPUT_EDGE_FALLING = 0,
 		SIL164_INPUT_EDGE_RISING