From e4c61abe6774abe0375b5cf9251ee8633fcabb4a Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Tue, 24 May 2022 03:05:22 +0200
Subject: drm/bridge: rcar: Convert to drm_of_get_data_lanes_count_ep
Git-commit: d643daaf1694b7565fbe3982b630e1c7b95f1600
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

Convert driver to use this new helper to standardize
OF "data-lanes" parsing.

Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220524010522.528569-11-marex@denx.de
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
index 891bb956fd61..67dce337098a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
@@ -683,19 +683,10 @@ static int rcar_mipi_dsi_parse_dt(struct rcar_mipi_dsi *dsi)
 	u32 data_lanes[4];
 	int ret;
 
-	ep = of_graph_get_endpoint_by_regs(dsi->dev->of_node, 1, 0);
-	if (!ep) {
-		dev_dbg(dsi->dev, "unconnected port@1\n");
-		return -ENODEV;
-	}
-
-	ret = of_property_read_variable_u32_array(ep, "data-lanes", data_lanes,
-						  1, 4);
-	of_node_put(ep);
-
+	ret = drm_of_get_data_lanes_count_ep(dsi->dev->of_node, 1, 0, 1, 4);
 	if (ret < 0) {
 		dev_err(dsi->dev, "missing or invalid data-lanes property\n");
-		return -ENODEV;
+		return ret;
 	}
 
 	dsi->num_data_lanes = ret;
-- 
2.38.1