linux-kernel - [PATCH 10/22] media: st-mipid02: Fix fwnode media link creation

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Date:   Mon,  5 Aug 2019 16:34:53 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     linux-media@...r.kernel.org
Cc:     Steve Longerbeam <slongerbeam@...il.com>,
        Mickael Guene <mickael.guene@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 10/22] media: st-mipid02: Fix fwnode media link creation

mipid02_async_bound() passes the bound subdev's sd->fwnode to
media_entity_get_fwnode_pad(). This is likely not an endpoint
fwnode as required by media_entity_get_fwnode_pad(), for most
subdevices it is the port parent of endpoint fwnode(s). This has only
worked before because no entities have implemented the .get_fwnode_pad()
op yet, and the default behavior of media_entity_get_fwnode_pad()
was to ignore the passed fwnode and return the first pad that matches
the given direction flags.

Fix this by replacing the calls to media_entity_get_fwnode_pad() and
media_create_pad_link() with a call to media_create_fwnode_pad_links().

Fixes: 642bb5e88fed8 ("media: st-mipid02: MIPID02 CSI-2 to PARALLEL
bridge driver")

Signed-off-by: Steve Longerbeam <slongerbeam@...il.com>
---
 drivers/media/i2c/st-mipid02.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
index 81285b8d5cfb..b26d5550874f 100644
--- a/drivers/media/i2c/st-mipid02.c
+++ b/drivers/media/i2c/st-mipid02.c
@@ -798,24 +798,16 @@ static int mipid02_async_bound(struct v4l2_async_notifier *notifier,
 {
 	struct mipid02_dev *bridge = to_mipid02_dev(notifier->sd);
 	struct i2c_client *client = bridge->i2c_client;
-	int source_pad;
 	int ret;
 
 	dev_dbg(&client->dev, "sensor_async_bound call %p", s_subdev);
 
-	source_pad = media_entity_get_fwnode_pad(&s_subdev->entity,
-						 s_subdev->fwnode,
-						 MEDIA_PAD_FL_SOURCE);
-	if (source_pad < 0) {
-		dev_err(&client->dev, "Couldn't find output pad for subdev %s\n",
-			s_subdev->name);
-		return source_pad;
-	}
-
-	ret = media_create_pad_link(&s_subdev->entity, source_pad,
-				    &bridge->sd.entity, 0,
-				    MEDIA_LNK_FL_ENABLED |
-				    MEDIA_LNK_FL_IMMUTABLE);
+	ret = media_create_fwnode_pad_links(&bridge->sd.entity.pads[0],
+					    dev_fwnode(&client->dev),
+					    &s_subdev->entity,
+					    dev_fwnode(s_subdev->dev),
+					    MEDIA_LNK_FL_ENABLED |
+					    MEDIA_LNK_FL_IMMUTABLE);
 	if (ret) {
 		dev_err(&client->dev, "Couldn't create media link %d", ret);
 		return ret;
-- 
2.17.1