Add the set_routing() subdev operation to allow userspace to configure
the CSI-2 virtual channel.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/i2c/adv748x/adv748x-csi2.c | 73 ++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
index 9824ebe44eb1..bf927898b918 100644
--- a/drivers/media/i2c/adv748x/adv748x-csi2.c
+++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
@@ -340,12 +340,85 @@ static int adv748x_csi2_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
return ret;
}
+static int adv748x_csi2_routing_validate(struct adv748x_csi2 *tx,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct v4l2_subdev_route *route;
+
+ if (routing->num_routes != 1) {
+ dev_err(tx->state->dev, "Unsupported number of routes %u",
+ routing->num_routes);
+ return -EINVAL;
+ }
+
+ route = &routing->routes[0];
+
+ if (route->sink_pad != ADV748X_CSI2_SINK ||
+ route->source_pad != ADV748X_CSI2_SOURCE) {
+ dev_err(tx->state->dev,
+ "Routes should go from the sink to the source pads.\n");
+ return -EINVAL;
+ }
+
+ if (route->source_stream > 4) {
+ dev_err(tx->state->dev, "Unsupported source stream %u\n",
+ route->source_stream);
+ return -EINVAL;
+ }
+
+ if (route->sink_stream != 0) {
+ dev_err(tx->state->dev, "Unsupported sink stream %u\n",
+ route->sink_stream);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int adv748x_csi2_set_vc_with_routing(struct adv748x_csi2 *tx,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct v4l2_subdev_route *route = &routing->routes[0];
+
+ return adv748x_csi2_set_virtual_channel(tx, route->source_stream);
+}
+
+static int adv748x_csi2_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
+ int ret;
+
+ v4l2_subdev_lock_state(state);
+
+ ret = adv748x_csi2_routing_validate(tx, routing);
+ if (ret)
+ goto out;
+
+ ret = v4l2_subdev_set_routing(sd, state, routing);
+ if (ret)
+ goto out;
+
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ goto out;
+
+ ret = adv748x_csi2_set_vc_with_routing(tx, routing);
+
+out:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
.init_cfg = adv748x_csi2_init_cfg,
.get_fmt = v4l2_subdev_get_fmt,
.set_fmt = adv748x_csi2_set_format,
.get_mbus_config = adv748x_csi2_get_mbus_config,
.get_frame_desc = adv748x_csi2_get_frame_desc,
+ .set_routing = adv748x_csi2_set_routing,
};
/* -----------------------------------------------------------------------------
--
2.35.0
