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.
Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_dp_core.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 94f02a0..0b53045 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -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;
@@ -1403,15 +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 -ENXIO;
+ }
+ }
}
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ panel_node = !endpoint ? NULL : panel_node;
+
+ endpoint = of_graph_get_next_endpoint(dev->of_node, panel_node);
if (endpoint) {
bridge_node = of_graph_get_remote_port_parent(endpoint);
if (bridge_node) {
--
1.9.1
--
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