From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
- Add sink and source streams for multiplexed links
- Copy the argument back in case of an error. This is needed to let the
caller know the number of routes.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
- Expand and refine documentation.
- Make the 'routes' pointer a __u64 __user pointer so that a compat32
version of the ioctl is not required.
- Add struct v4l2_subdev_krouting to be used for subdevice operations.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 25 ++++++++++++++++-
drivers/media/v4l2-core/v4l2-subdev.c | 36 ++++++++++++++++++++++++
include/media/v4l2-subdev.h | 22 +++++++++++++++
include/uapi/linux/v4l2-subdev.h | 40 +++++++++++++++++++++++++++
4 files changed, 122 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index ac87c3e37280..091f25526e72 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/version.h>
+#include <linux/v4l2-subdev.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
@@ -2968,6 +2969,21 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
}
break;
}
+
+ case VIDIOC_SUBDEV_G_ROUTING:
+ case VIDIOC_SUBDEV_S_ROUTING: {
+ struct v4l2_subdev_routing *route = parg;
+
+ if (route->num_routes > 256)
+ return -EINVAL;
+
+ *user_ptr = (void __user *)route->routes;
+ *kernel_ptr = (void *)&route->routes;
+ *array_size = sizeof(struct v4l2_subdev_route)
+ * route->num_routes;
+ ret = 1;
+ break;
+ }
}
return ret;
@@ -3076,8 +3092,15 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
/*
* Some ioctls can return an error, but still have valid
* results that must be returned.
+ *
+ * FIXME: subdev IOCTLS are partially handled here and partially in
+ * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
+ * defined here as part of the 'v4l2_ioctls' array. As
+ * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even
+ * in case of failure, but it is not defined here as part of the
+ * 'v4l2_ioctls' array, insert an ad-hoc check to address that.
*/
- if (err < 0 && !always_copy)
+ if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING)
goto out;
out_array_args:
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index d75815ab0d7b..63801985c275 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -515,6 +515,42 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_SUBDEV_QUERYSTD:
return v4l2_subdev_call(sd, video, querystd, arg);
+
+ case VIDIOC_SUBDEV_G_ROUTING: {
+ struct v4l2_subdev_routing *routing = arg;
+ struct v4l2_subdev_krouting krouting = {
+ .num_routes = routing->num_routes,
+ .routes = (struct v4l2_subdev_route *)routing->routes,
+ };
+ int ret;
+
+ ret = v4l2_subdev_call(sd, pad, get_routing, &krouting);
+ if (ret)
+ return ret;
+
+ routing->num_routes = krouting.num_routes;
+
+ return 0;
+ }
+
+ case VIDIOC_SUBDEV_S_ROUTING: {
+ struct v4l2_subdev_routing *routing = arg;
+ struct v4l2_subdev_route *route = (struct v4l2_subdev_route *)
+ routing->routes;
+ struct v4l2_subdev_krouting krouting = {};
+ unsigned int i;
+
+ for (i = 0; i < routing->num_routes; ++i) {
+ if (route[i].sink_pad >= sd->entity.num_pads ||
+ route[i].source_pad >= sd->entity.num_pads)
+ return -EINVAL;
+ }
+
+ krouting.num_routes = routing->num_routes;
+ krouting.routes = route;
+
+ return v4l2_subdev_call(sd, pad, set_routing, &krouting);
+ }
#endif
default:
return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index e61584fe484c..b9b042877c3a 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -669,6 +669,20 @@ struct v4l2_subdev_pad_config {
struct v4l2_rect try_compose;
};
+/**
+ * struct v4l2_subdev_krouting - subdev routing table
+ *
+ * @routes: &struct v4l2_subdev_route
+ * @num_routes: number of routes
+ *
+ * This structure is used to translate argument received from
+ * VIDIOC_SUBDEV_G/S_ROUTING() ioctl to sudev device drivers operations.
+ */
+struct v4l2_subdev_krouting {
+ struct v4l2_subdev_route *routes;
+ unsigned int num_routes;
+};
+
/**
* struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
*
@@ -706,6 +720,10 @@ struct v4l2_subdev_pad_config {
*
* @set_frame_desc: set the low level media bus frame parameters, @fd array
* may be adjusted by the subdev driver to device capabilities.
+ *
+ * @get_routing: get the subdevice routing table.
+ * @set_routing: enable or disable data connection routes described in the
+ * subdevice routing table.
*/
struct v4l2_subdev_pad_ops {
int (*init_cfg)(struct v4l2_subdev *sd,
@@ -746,6 +764,10 @@ struct v4l2_subdev_pad_ops {
struct v4l2_mbus_frame_desc *fd);
int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_frame_desc *fd);
+ int (*get_routing)(struct v4l2_subdev *sd,
+ struct v4l2_subdev_krouting *route);
+ int (*set_routing)(struct v4l2_subdev *sd,
+ struct v4l2_subdev_krouting *route);
};
/**
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index 03970ce30741..b8924a6a029c 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -155,6 +155,44 @@ struct v4l2_subdev_selection {
__u32 reserved[8];
};
+#define V4L2_SUBDEV_ROUTE_FL_ACTIVE (1 << 0)
+#define V4L2_SUBDEV_ROUTE_FL_IMMUTABLE (1 << 1)
+
+/**
+ * struct v4l2_subdev_route - A route inside a subdev
+ * @sink_pad: the sink pad index
+ * @sink_stream: the sink stream identifier
+ * @source_pad: the source pad index
+ * @source_stream: the source stream identifier
+ * @flags: route flags:
+ *
+ * V4L2_SUBDEV_ROUTE_FL_ACTIVE: Is the route active? An active
+ * route will start when streaming is enabled on a video node.
+ * Set by the user.
+ *
+ * V4L2_SUBDEV_ROUTE_FL_IMMUTABLE: Is the route immutable, i.e.
+ * can it be activated and inactivated? Set by the driver.
+ */
+struct v4l2_subdev_route {
+ __u32 sink_pad;
+ __u32 sink_stream;
+ __u32 source_pad;
+ __u32 source_stream;
+ __u32 flags;
+ __u32 reserved[5];
+};
+
+/**
+ * struct v4l2_subdev_routing - Subdev routing information
+ * @routes: pointer to the routes array
+ * @num_routes: the total number of routes in the routes array
+ */
+struct v4l2_subdev_routing {
+ __u64 routes;
+ __u32 num_routes;
+ __u32 reserved[5];
+};
+
/* Backwards compatibility define --- to be removed */
#define v4l2_subdev_edid v4l2_edid
@@ -181,5 +219,7 @@ struct v4l2_subdev_selection {
#define VIDIOC_SUBDEV_ENUM_DV_TIMINGS _IOWR('V', 98, struct v4l2_enum_dv_timings)
#define VIDIOC_SUBDEV_QUERY_DV_TIMINGS _IOR('V', 99, struct v4l2_dv_timings)
#define VIDIOC_SUBDEV_DV_TIMINGS_CAP _IOWR('V', 100, struct v4l2_dv_timings_cap)
+#define VIDIOC_SUBDEV_G_ROUTING _IOWR('V', 38, struct v4l2_subdev_routing)
+#define VIDIOC_SUBDEV_S_ROUTING _IOWR('V', 39, struct v4l2_subdev_routing)
#endif
--
2.21.0
