Create and initialize the v4l2_subdev_state for the R-Car CSI-2 receiver
in order to prepare to support multiplexed transmitters.
Create the subdevice state with v4l2_subdev_init_finalize() and
implement the init_cfg() operation to guarantee the state is initialized
correctly with a set of default routes.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/platform/rcar-vin/rcar-csi2.c | 74 ++++++++++++++++++++-
1 file changed, 72 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c
index b8c56d248454..e8a79a30cc49 100644
--- a/drivers/media/platform/rcar-vin/rcar-csi2.c
+++ b/drivers/media/platform/rcar-vin/rcar-csi2.c
@@ -875,11 +875,73 @@ static int rcsi2_get_pad_format(struct v4l2_subdev *sd,
return 0;
}
+static int rcsi2_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ /*
+ * Routing is fixed for this device: which stream goes to the next
+ * processing block (VIN) is controlled by link enablement between the
+ * CSI-2 and the VIN itself.
+ *
+ * In example, to route VC 3 to VIN1, as an example: "csi2:3 -> vin1:0"
+ *
+ * The routing table is then fixed as streams transmitted on VC x will
+ * be directed to csi:0/x and will be transmitted to VINs on media link
+ * csi2:x->vin:0.
+ */
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = RCAR_CSI2_SINK,
+ .sink_stream = 0,
+ .source_pad = RCAR_CSI2_SOURCE_VC0,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ {
+ .sink_pad = RCAR_CSI2_SINK,
+ .sink_stream = 1,
+ .source_pad = RCAR_CSI2_SOURCE_VC1,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ {
+ .sink_pad = RCAR_CSI2_SINK,
+ .sink_stream = 2,
+ .source_pad = RCAR_CSI2_SOURCE_VC2,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ {
+ .sink_pad = RCAR_CSI2_SINK,
+ .sink_stream = 3,
+ .source_pad = RCAR_CSI2_SOURCE_VC3,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ int ret = v4l2_subdev_routing_validate_1_to_1(&routing);
+ if (ret)
+ return ret;
+
+ v4l2_subdev_lock_state(state);
+ ret = v4l2_subdev_set_routing(sd, state, &routing);
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
static const struct v4l2_subdev_video_ops rcar_csi2_video_ops = {
.s_stream = rcsi2_s_stream,
};
static const struct v4l2_subdev_pad_ops rcar_csi2_pad_ops = {
+ .init_cfg = rcsi2_init_cfg,
.set_fmt = rcsi2_set_pad_format,
.get_fmt = rcsi2_get_pad_format,
};
@@ -1494,7 +1556,8 @@ static int rcsi2_probe(struct platform_device *pdev)
v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s %s",
KBUILD_MODNAME, dev_name(&pdev->dev));
- priv->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+ priv->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE |
+ V4L2_SUBDEV_FL_MULTIPLEXED;
priv->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
priv->subdev.entity.ops = &rcar_csi2_entity_ops;
@@ -1515,14 +1578,20 @@ static int rcsi2_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
+ ret = v4l2_subdev_init_finalize(&priv->subdev);
+ if (ret)
+ goto error_async;
+
ret = v4l2_async_register_subdev(&priv->subdev);
if (ret < 0)
- goto error_async;
+ goto error_subdev;
dev_info(priv->dev, "%d lanes found\n", priv->lanes);
return 0;
+error_subdev:
+ v4l2_subdev_cleanup(&priv->subdev);
error_async:
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
@@ -1539,6 +1608,7 @@ static int rcsi2_remove(struct platform_device *pdev)
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
v4l2_async_unregister_subdev(&priv->subdev);
+ v4l2_subdev_cleanup(&priv->subdev);
pm_runtime_disable(&pdev->dev);
--
2.35.0
