diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c
index ce57fa9917e5112f2babadb4972c0a1d325804b3..6bdd23e2a47c739a3ab5804ffde75688c4a1a33a 100644
--- a/drivers/gpu/drm/tiny/st7586.c
+++ b/drivers/gpu/drm/tiny/st7586.c
@@ -263,6 +263,7 @@ static const u32 st7586_formats[] = {
 };
 
 static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
+	.mode_valid	= mipi_dbi_pipe_mode_valid,
 	.enable		= st7586_pipe_enable,
 	.disable	= st7586_pipe_disable,
 	.update		= st7586_pipe_update,