diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 7b628f4..d98b08c 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -640,7 +640,7 @@ EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size);
  *
  * Return: 0 on success or a negative error code on failure.
  */
-int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
+ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
 {
 	/* Note: Needs updating for non-default PPS or algorithm */
 	u8 tx[2] = { enable << 0, 0 };
@@ -665,8 +665,8 @@ EXPORT_SYMBOL(mipi_dsi_compression_mode);
  *
  * Return: 0 on success or a negative error code on failure.
  */
-int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
-				   const struct drm_dsc_picture_parameter_set *pps)
+ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
+				       const struct drm_dsc_picture_parameter_set *pps)
 {
 	struct mipi_dsi_msg msg = {
 		.channel = dsi->channel,
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 47ab2809..d9af720 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -238,9 +238,9 @@ int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
 					    u16 value);
-int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);
-int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
-				   const struct drm_dsc_picture_parameter_set *pps);
+ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);
+ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
+				       const struct drm_dsc_picture_parameter_set *pps);
 
 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
 			       size_t size);