diff --git a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
index 9eb5abaf7d660229fffc8db8d75b989757f5d60b..49bbd00c77aecd544ce657c36582209dbdf2fbdb 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
@@ -29,7 +29,7 @@ void fsl_tcon_bypass_enable(struct fsl_tcon *tcon)
 			   FSL_TCON_CTRL1_TCON_BYPASS);
 }
 
-static struct regmap_config fsl_tcon_regmap_config = {
+static const struct regmap_config fsl_tcon_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,