linux-kernel - [RFC PATCH v4 09/12] media: imx219: Introduce the set

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Date:   Thu,  3 Feb 2022 18:50:06 +0100
From:   Jean-Michel Hautbois <jeanmichel.hautbois@...asonboard.com>
To:     jeanmichel.hautbois@...asonboard.com
Cc:     dave.stevenson@...pberrypi.com, devicetree@...r.kernel.org,
        kernel-list@...pberrypi.com, laurent.pinchart@...asonboard.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        lukasz@...y.st, mchehab@...nel.org, naush@...pberrypi.com,
        robh@...nel.org, tomi.valkeinen@...asonboard.com,
        nsaenz@...nel.org, bcm-kernel-feedback-list@...adcom.com
Subject: [RFC PATCH v4 09/12] media: imx219: Introduce the set_routing operation

As we want to use multiplexed streams API, we need to be able to set the
pad routing. Introduce the set_routing operation.

As this operation is required for a multiplexed able sensor, add the
V4L2_SUBDEV_FL_MULTIPLEXED flag.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@...asonboard.com>
---
 drivers/media/i2c/imx219.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index b68d35046725..7d29cf2b06f8 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -817,6 +817,25 @@ static int _imx219_set_routing(struct v4l2_subdev *sd,
 	return 0;
 }
 
+static int imx219_set_routing(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *state,
+			      enum v4l2_subdev_format_whence which,
+			      struct v4l2_subdev_krouting *routing)
+{
+	int ret;
+
+	if (routing->num_routes == 0 || routing->num_routes > 2)
+		return -EINVAL;
+
+	v4l2_subdev_lock_state(state);
+
+	ret = _imx219_set_routing(sd, state);
+
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
+}
+
 static int imx219_init_cfg(struct v4l2_subdev *sd,
 			   struct v4l2_subdev_state *state)
 {
@@ -1289,6 +1308,7 @@ static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
 	.get_fmt		= imx219_get_pad_format,
 	.set_fmt		= imx219_set_pad_format,
 	.get_selection		= imx219_get_selection,
+	.set_routing		= imx219_set_routing,
 	.enum_frame_size	= imx219_enum_frame_size,
 };
 
@@ -1547,7 +1567,8 @@ static int imx219_probe(struct i2c_client *client)
 
 	/* Initialize subdev */
 	imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
-			    V4L2_SUBDEV_FL_HAS_EVENTS;
+			    V4L2_SUBDEV_FL_HAS_EVENTS |
+			    V4L2_SUBDEV_FL_MULTIPLEXED;
 	imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
 
 	/* Initialize source pad */
-- 
2.32.0