Hi,
On 5/21/24 15:57, AngeloGioacchino Del Regno wrote:
+static int mtk_drm_of_get_ddp_comp_type(struct device_node *node, enum mtk_ddp_comp_type *ctype)
+{
+ const struct of_device_id *of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
+
+ if (!of_id)
+ return -EINVAL;
+
+ *ctype = (enum mtk_ddp_comp_type)((uintptr_t)of_id->data);
+
+ return 0;
+}
+
+static int mtk_drm_of_get_ddp_ep_cid(struct device_node *node,
+ int output_port, enum mtk_crtc_path crtc_path,
+ struct device_node **next, unsigned int *cid)
+{
+ struct device_node *ep_dev_node, *ep_out;
+ enum mtk_ddp_comp_type comp_type;
+ int ret;
+
+ ep_out = of_graph_get_endpoint_by_regs(node, output_port, crtc_path);
+ if (!ep_out)
+ return -ENOENT;
+
+ ep_dev_node = of_graph_get_remote_port_parent(ep_out);
below here, 'ep_out' will not be used anymore.
of_node_put(ep_out);
Maybe we should call it under a error handling tag?
But this is trivial problem.
+ if (!ep_dev_node)
+ return -EINVAL;
+
+ /*
+ * Pass the next node pointer regardless of failures in the later code
+ * so that if this function is called in a loop it will walk through all
+ * of the subsequent endpoints anyway.
+ */
+ *next = ep_dev_node;
+
+ if (!of_device_is_available(ep_dev_node))
+ return -ENODEV;
+
+ ret = mtk_drm_of_get_ddp_comp_type(ep_dev_node, &comp_type);
+ if (ret) {
+ if (mtk_ovl_adaptor_is_comp_present(ep_dev_node)) {
+ *cid = (unsigned int)DDP_COMPONENT_DRM_OVL_ADAPTOR;
+ return 0;
+ }
+ return ret;
+ }
+
+ ret = mtk_ddp_comp_get_id(ep_dev_node, comp_type);
+ if (ret < 0)
+ return ret;
+
+ /* All ok! Pass the Component ID to the caller. */
+ *cid = (unsigned int)ret;
+
+ return 0;
+}
+
--
Best regards
Sui Jingfeng
