[PATCH v2 16/23] media: imx7-mipi-csis: Create media links in bound notifier

From: Steve Longerbeam <slongerbeam@gmail.com>
To: linux-media@vger.kernel.org
Cc: Steve Longerbeam <slongerbeam@gmail.com>
Subject: [PATCH v2 16/23] media: imx7-mipi-csis: Create media links in bound notifier
Date: Sun, 24 Nov 2019 11:06:56 -0800	[thread overview]
Message-ID: <20191124190703.12138-17-slongerbeam@gmail.com> (raw)
In-Reply-To: <20191124190703.12138-1-slongerbeam@gmail.com>

Implement a notifier bound op to register media links from the remote
sub-device's source pad(s) to the mipi csi-2 receiver sink pad.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
---
Changes in v2:
Move notifier_to_csis_state() next to mipi_sd_to_csis_state(), remove
unnecessary inline, and rename to mipi_notifier_to_csis_state().
Suggested-by: Rui Miguel Silva <rmfrfs@gmail.com>
---
 drivers/staging/media/imx/imx7-mipi-csis.c | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
index bbbc4d55fa9e..0ea6a48c2274 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -319,6 +319,12 @@ static int mipi_csis_dump_regs(struct csi_state *state)
 	return 0;
 }
 
+static struct csi_state *
+mipi_notifier_to_csis_state(struct v4l2_async_notifier *n)
+{
+	return container_of(n, struct csi_state, notifier);
+}
+
 static struct csi_state *mipi_sd_to_csis_state(struct v4l2_subdev *sdev)
 {
 	return container_of(sdev, struct csi_state, mipi_sd);
@@ -850,6 +856,23 @@ static int mipi_csis_parse_endpoint(struct device *dev,
 	return 0;
 }
 
+static int mipi_csis_notify_bound(struct v4l2_async_notifier *notifier,
+				  struct v4l2_subdev *sd,
+				  struct v4l2_async_subdev *asd)
+{
+	struct csi_state *state = mipi_notifier_to_csis_state(notifier);
+	struct media_pad *sink = &state->mipi_sd.entity.pads[CSIS_PAD_SINK];
+
+	return media_create_fwnode_pad_links(sink,
+					     dev_fwnode(state->mipi_sd.dev),
+					     &sd->entity,
+					     dev_fwnode(sd->dev), 0);
+}
+
+static const struct v4l2_async_notifier_operations mipi_csis_notify_ops = {
+	.bound = mipi_csis_notify_bound,
+};
+
 static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd,
 				 struct platform_device *pdev,
 				 const struct v4l2_subdev_ops *ops)
@@ -888,6 +911,8 @@ static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd,
 
 	v4l2_async_notifier_init(&state->notifier);
 
+	state->notifier.ops = &mipi_csis_notify_ops;
+
 	ret = v4l2_async_register_fwnode_subdev(mipi_sd, &state->notifier,
 						sizeof(struct v4l2_async_subdev),
 						&sink_port, 1,
-- 
2.17.1

