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

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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: Inki Dae <inki.dae@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
This commit is contained in:
Inki Dae 2015-11-26 21:34:18 +09:00 committed by Inki Dae
parent 69e048572e
commit a9fa852886
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/exynos/exynos_dp_core.c
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@ -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;
@ -1403,14 +1403,32 @@ 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) {
bridge_node = of_graph_get_remote_port_parent(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);