diff --git a/drivers/gpu/drm/imx/dcss/dcss-scaler.c b/drivers/gpu/drm/imx/dcss/dcss-scaler.c
index 32c3f46b21da..5c7f8d952ec1 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-scaler.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-scaler.c
@@ -166,6 +166,7 @@ static int exp_approx_q(int x)
  * dcss_scaler_gaussian_filter() - Generate gaussian prototype filter.
  * @fc_q: fixed-point cutoff frequency normalized to range [0, 1]
  * @use_5_taps: indicates whether to use 5 taps or 7 taps
+ * @phase0_identity: whether to override phase 0 coefficients with identity filter
  * @coef: output filter coefficients
  */
 static void dcss_scaler_gaussian_filter(int fc_q, bool use_5_taps,
@@ -262,7 +263,9 @@ static void dcss_scaler_nearest_neighbor_filter(bool use_5_taps,
  * @src_length: length of input
  * @dst_length: length of output
  * @use_5_taps: 0 for 7 taps per phase, 1 for 5 taps
+ * @phase0_identity: whether to override phase 0 coefficients with identity filter
  * @coef: output coefficients
+ * @nn_interpolation: whether to use nearest neighbor instead of gaussian filter
  */
 static void dcss_scaler_filter_design(int src_length, int dst_length,
 				      bool use_5_taps, bool phase0_identity,