[PATCH] drm: bridge: thc63lvd1024: Print error message when DT parsing fails

From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
To: dri-devel@lists.freedesktop.org
Cc: Sui Jingfeng <sui.jingfeng@linux.dev>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>, Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>
Subject: [PATCH] drm: bridge: thc63lvd1024: Print error message when DT parsing fails
Date: Mon, 18 Mar 2024 18:06:01 +0200	[thread overview]
Message-ID: <20240318160601.2813-1-laurent.pinchart+renesas@ideasonboard.com> (raw)

Commit 00084f0c01bf ("drm: bridge: thc63lvd1024: Switch to use
of_graph_get_remote_node()") simplified the thc63lvd1024 driver by
replacing hand-rolled code with a helper function. While doing so, it
created an error code path at probe time without any error message,
potentially causing probe issues that get annoying to debug. Fix it by
adding an error message.

Fixes: 00084f0c01bf ("drm: bridge: thc63lvd1024: Switch to use of_graph_get_remote_node()")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/bridge/thc63lvd1024.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/thc63lvd1024.c b/drivers/gpu/drm/bridge/thc63lvd1024.c
index 5f99f9724081..674efc489e3a 100644
--- a/drivers/gpu/drm/bridge/thc63lvd1024.c
+++ b/drivers/gpu/drm/bridge/thc63lvd1024.c
@@ -125,8 +125,11 @@ static int thc63_parse_dt(struct thc63_dev *thc63)
 
 	remote = of_graph_get_remote_node(thc63->dev->of_node,
 					  THC63_RGB_OUT0, -1);
-	if (!remote)
+	if (!remote) {
+		dev_err(thc63->dev, "No remote endpoint for port@%u\n",
+			THC63_RGB_OUT0);
 		return -ENODEV;
+	}
 
 	thc63->next = of_drm_find_bridge(remote);
 	of_node_put(remote);

base-commit: 00084f0c01bf3a2591d007010b196e048281c455
-- 
Regards,

Laurent Pinchart

