diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 90bcb1eb9cd9..02fef624bf71 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -390,6 +390,11 @@ static int ast_drm_freeze(struct drm_device *dev)
 
 static int ast_drm_thaw(struct drm_device *dev)
 {
+	struct ast_device *ast = to_ast_device(dev);
+
+	ast_enable_vga(ast->ioregs);
+	ast_open_key(ast->ioregs);
+	ast_enable_mmio(dev->dev, ast->ioregs);
 	ast_post_gpu(dev);
 
 	return drm_mode_config_helper_resume(dev);