diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 850ca73bea4d..80b75501f5c6 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -350,8 +350,8 @@ int mipi_dsi_detach(struct mipi_dsi_device *dsi)
 }
 EXPORT_SYMBOL(mipi_dsi_detach);
 
-ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
-				 struct mipi_dsi_msg *msg)
+static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
+					struct mipi_dsi_msg *msg)
 {
 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;
 
@@ -363,7 +363,6 @@ ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
 
 	return ops->transfer(dsi->host, msg);
 }
-EXPORT_SYMBOL(mipi_dsi_device_transfer);
 
 /**
  * mipi_dsi_packet_format_is_short - check if a packet is of the short format
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 5448b67a8a9c..4fef19064b0f 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -247,16 +247,6 @@ enum mipi_dsi_dcs_tear_mode {
 #define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)
 #define MIPI_DSI_DCS_POWER_MODE_IDLE    (1 << 6)
 
-#ifdef CONFIG_DRM_MIPI_DSI
-ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
-				 struct mipi_dsi_msg *msg);
-#else
-static inline ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
-					       struct mipi_dsi_msg *msg)
-{
-	return -EINVAL;
-}
-#endif
 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
 				  const void *data, size_t len);
 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,