diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c
index acf0d23514e8..8d693c8b346f 100644
--- a/drivers/gpu/drm/ast/ast_cursor.c
+++ b/drivers/gpu/drm/ast/ast_cursor.c
@@ -47,7 +47,7 @@ static void ast_cursor_fini(struct ast_private *ast)
 
 static void ast_cursor_release(struct drm_device *dev, void *ptr)
 {
-	struct ast_private *ast = dev->dev_private;
+	struct ast_private *ast = to_ast_private(dev);
 
 	ast_cursor_fini(ast);
 }
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 78f28a4e6ed8..cdbdf3489dee 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -663,7 +663,7 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
 {
 	struct drm_plane_state *state = plane->state;
 	struct drm_framebuffer *fb = state->fb;
-	struct ast_private *ast = plane->dev->dev_private;
+	struct ast_private *ast = to_ast_private(plane->dev);
 	unsigned int offset_x, offset_y;
 
 	offset_x = AST_MAX_HWC_WIDTH - fb->width;