From 5f0cde7958e8032806d6e6eafadf3170dc15ca2c Mon Sep 17 00:00:00 2001
From: Sandy Huang <hjc@rock-chips.com>
Date: Mon, 8 Feb 2021 10:46:44 +0800
Subject: [PATCH] video/drm: display: add compatible rk356x lvds dts config

after this commit, can support parse the following two config:

1.
panel {
    ...

    display-timings {
        ...
    };

    port@0 {
	reg = <0>;
	panel_in_lvds: endpoint {
	    remote-endpoint = <&lvds_out_panel>;
	};
    };
};

2.
panel {
    ...

    display-timings {
        ...
    };

    ports {
        #address-cells = <1>;
	#size-cells = <0>;

	port@0 {
	    reg = <0>;
	    panel_in_lvds: endpoint {
		remote-endpoint = <&lvds_out_panel>;
	    };
	};
    };
};

Signed-off-by: Sandy Huang <hjc@rock-chips.com>
Change-Id: Idbcc31bbe29d00fe5ceea1f5041543cdfe9bc34e
---
 drivers/video/drm/rockchip_display.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/video/drm/rockchip_display.c b/drivers/video/drm/rockchip_display.c
index 11bf7209cb..e40bd24611 100644
--- a/drivers/video/drm/rockchip_display.c
+++ b/drivers/video/drm/rockchip_display.c
@@ -1165,7 +1165,7 @@ enum {
 
 static struct rockchip_panel *rockchip_of_find_panel(struct udevice *dev)
 {
-	ofnode panel_node, ports, port, ep;
+	ofnode panel_node, ports, port, ep, port_parent_node;
 	struct udevice *panel_dev;
 	int ret;
 
@@ -1193,6 +1193,7 @@ static struct rockchip_panel *rockchip_of_find_panel(struct udevice *dev)
 		ofnode_for_each_subnode(ep, port) {
 			ofnode _ep, _port;
 			uint phandle;
+			bool is_ports_node = false;
 
 			if (ofnode_read_u32(ep, "remote-endpoint", &phandle))
 				continue;
@@ -1205,7 +1206,12 @@ static struct rockchip_panel *rockchip_of_find_panel(struct udevice *dev)
 			if (!ofnode_valid(_port))
 				continue;
 
-			panel_node = ofnode_get_parent(_port);
+			port_parent_node = ofnode_get_parent(_port);
+			is_ports_node = strstr(port_parent_node.np->full_name, "ports") ? 1 : 0;
+			if (is_ports_node)
+				panel_node = ofnode_get_parent(port_parent_node);
+			else
+				panel_node = ofnode_get_parent(_port);
 			if (!ofnode_valid(panel_node))
 				continue;