drm/arcpgu: rework encoder search

#include <drm/drm_fb_helper.h>

#include <drm/drm_gem_cma_helper.h>

#include <drm/drm_gem_framebuffer_helper.h>

#include <drm/drm_of.h>

#include <drm/drm_probe_helper.h>

#include <linux/dma-mapping.h>

#include <linux/module.h>

{

	struct platform_device *pdev = to_platform_device(drm->dev);

	struct arcpgu_drm_private *arcpgu;

	struct device_node *encoder_node;

	struct device_node *encoder_node = NULL, *endpoint_node = NULL;

	struct resource *res;

	int ret;

	if (arc_pgu_setup_crtc(drm) < 0)

		return -ENODEV;

	/* find the encoder node and initialize it */

	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);

	/*

	 * There is only one output port inside each device. It is linked with

	 * encoder endpoint.

	 */

	endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);

	if (endpoint_node) {

		encoder_node = of_graph_get_remote_port_parent(endpoint_node);

		of_node_put(endpoint_node);

	}

	if (encoder_node) {

		ret = arcpgu_drm_hdmi_init(drm, encoder_node);

		of_node_put(encoder_node);

		if (ret < 0)

			return ret;

	} else {

		dev_info(drm->dev, "no encoder found. Assumed virtual LCD on simulation platform\n");

		ret = arcpgu_drm_sim_init(drm, NULL);

		if (ret < 0)

			return ret;