diff --git a/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h b/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h
index dbdd015ce220..caa358e0bae4 100644
--- a/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h
+++ b/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h
@@ -626,8 +626,11 @@ struct ipu3_uapi_stats_3a {
  * @b:	white balance gain for B channel.
  * @gb:	white balance gain for Gb channel.
  *
- * Precision u3.13, range [0, 8). White balance correction is done by applying
- * a multiplicative gain to each color channels prior to BNR.
+ * For BNR parameters WB gain factor for the three channels [Ggr, Ggb, Gb, Gr].
+ * Their precision is U3.13 and the range is (0, 8) and the actual gain is
+ * Gx + 1, it is typically Gx = 1.
+ *
+ * Pout = {Pin * (1 + Gx)}.
  */
 struct ipu3_uapi_bnr_static_config_wb_gains_config {
 	__u16 gr;