[PATCH 2/6] drm/bridge: tc358775: Fix getting dsi host data lanes

[Tony Lindgren]

The current code assume hardcoded dsi host endpoint 1, which may not
be the case. Let's fix that and simplify the code by getting the dsi
endpoint with of_graph_get_remote_endpoint() that does not assume any
endpoint numbering.

Fixes: b26975593b17 ("display/drm/bridge: TC358775 DSI/LVDS driver")
Signed-off-by: Tony Lindgren <tony at atomide.com>
---
 drivers/gpu/drm/bridge/tc358775.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -528,25 +528,17 @@ tc_mode_valid(struct drm_bridge *bridge,
 static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
 {
 	struct device_node *endpoint;
-	struct device_node *parent;
 	struct device_node *remote;
 	int dsi_lanes = -1;
 
-	/*
-	 * To get the data-lanes of dsi, we need to access the dsi0_out of port1
-	 *  of dsi0 endpoint from bridge port0 of d2l_in
-	 */
 	endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
 						 TC358775_DSI_IN, -1);
 	if (endpoint) {
-		/* dsi0_out node */
-		parent = of_graph_get_remote_port_parent(endpoint);
+		/* Get the configured data lanes on the dsi host side */
+		remote = of_graph_get_remote_endpoint(endpoint);
 		of_node_put(endpoint);
-		if (parent) {
-			/* dsi0 port 1 */
-			dsi_lanes = drm_of_get_data_lanes_count_ep(parent, 1, -1, 1, 4);
-			of_node_put(parent);
-		}
+		dsi_lanes = drm_of_get_data_lanes_count(remote, 1, 4);
+		of_node_put(remote);
 	}
 
 	if (dsi_lanes < 0)
-- 
2.42.1