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@samsung.com --- 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) {