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Commit a9fa8528 authored by Inki Dae's avatar Inki Dae Committed by Inki Dae
Browse files

drm/exynos: dp: add of_graph dt binding support for panel 



This patch adds of_graph dt binding support for panel device
and also keeps the backward compatibility.

i.e.,
The dts file for Exynos5800 based peach pi board
has a panel property so we need to keep the backward compatibility.

Changelog v3:
- bind only one of two nodes outbound - panel or bridge.

Changelog v2:
- return -EINVAL if getting a port node failed.

Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
Reviewed-by: default avatarJavier Martinez Canillas <javier@osg.samsung.com>
parent 69e04857

drivers/gpu/drm/exynos/exynos_dp_core.c

+20 −1
Original line number Diff line number Diff line
@@ -1392,7 +1392,7 @@ static const struct component_ops exynos_dp_ops = { 
static int exynos_dp_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct device_node *panel_node, *bridge_node, *endpoint;

	struct device_node *panel_node = NULL, *bridge_node, *endpoint = NULL;

	struct exynos_dp_device *dp;

	int ret;
@@ -1403,13 +1403,31 @@ static int exynos_dp_probe(struct platform_device *pdev) 


	platform_set_drvdata(pdev, dp);



	/* This is for the backward compatibility. */

	panel_node = of_parse_phandle(dev->of_node, "panel", 0);

	if (panel_node) {

		dp->panel = of_drm_find_panel(panel_node);

		of_node_put(panel_node);

		if (!dp->panel)

			return -EPROBE_DEFER;

	} else {

		endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);

		if (endpoint) {

			panel_node = of_graph_get_remote_port_parent(endpoint);

			if (panel_node) {

				dp->panel = of_drm_find_panel(panel_node);

				of_node_put(panel_node);

				if (!dp->panel)

					return -EPROBE_DEFER;

			} else {

				DRM_ERROR("no port node for panel device.\n");

				return -EINVAL;

			}

		}

	}



	if (endpoint)

		goto out;



	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);

	if (endpoint) {
@@ -1423,6 +1441,7 @@ static int exynos_dp_probe(struct platform_device *pdev) 
			return -EPROBE_DEFER;

	}



out:

	pm_runtime_enable(dev);



	ret = component_add(&pdev->dev, &exynos_dp_ops);