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author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2021-04-23 10:15:54 +0300 |
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committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-01-22 11:33:33 +0300 |
commit | a418bb3f30d9ac570d51ff3f700851b78da2a8a9 (patch) | |
tree | fb466f26fe0b5ea7070636c5a49abc07d91344d2 /include/uapi/linux/v4l2-subdev.h | |
parent | ea73eda50813df0dadbbd6fe2b31ae9484da0cc0 (diff) | |
download | linux-a418bb3f30d9ac570d51ff3f700851b78da2a8a9.tar.xz |
media: subdev: Add [GS]_ROUTING subdev ioctls and operations
Add support for subdev internal routing. A route is defined as a single
stream from a sink pad to a source pad.
The userspace can configure the routing via two new ioctls,
VIDIOC_SUBDEV_G_ROUTING and VIDIOC_SUBDEV_S_ROUTING, and subdevs can
implement the functionality with v4l2_subdev_pad_ops.set_routing().
- 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.
- 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.
- Fix typecasing warnings
- Check sink & source pad types
- Add 'which' field
- Routing to subdev state
- Dropped get_routing subdev op
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/uapi/linux/v4l2-subdev.h')
-rw-r--r-- | include/uapi/linux/v4l2-subdev.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h index ffed9047e0be..284ae8c95960 100644 --- a/include/uapi/linux/v4l2-subdev.h +++ b/include/uapi/linux/v4l2-subdev.h @@ -11,6 +11,7 @@ #ifndef __LINUX_V4L2_SUBDEV_H #define __LINUX_V4L2_SUBDEV_H +#include <linux/const.h> #include <linux/ioctl.h> #include <linux/types.h> #include <linux/v4l2-common.h> @@ -178,6 +179,46 @@ struct v4l2_subdev_capability { /* The v4l2 sub-device supports routing and multiplexed streams. */ #define V4L2_SUBDEV_CAP_STREAMS 0x00000002 +/* + * Is the route active? An active route will start when streaming is enabled + * on a video node. + */ +#define V4L2_SUBDEV_ROUTE_FL_ACTIVE (1U << 0) + +/** + * 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_* + * @reserved: drivers and applications must zero this array + */ +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 + * + * @which: configuration type (from enum v4l2_subdev_format_whence) + * @num_routes: the total number of routes in the routes array + * @routes: pointer to the routes array + * @reserved: drivers and applications must zero this array + */ +struct v4l2_subdev_routing { + __u32 which; + __u32 num_routes; + __u64 routes; + __u32 reserved[6]; +}; + /* Backwards compatibility define --- to be removed */ #define v4l2_subdev_edid v4l2_edid @@ -193,6 +234,8 @@ struct v4l2_subdev_capability { #define VIDIOC_SUBDEV_S_CROP _IOWR('V', 60, struct v4l2_subdev_crop) #define VIDIOC_SUBDEV_G_SELECTION _IOWR('V', 61, struct v4l2_subdev_selection) #define VIDIOC_SUBDEV_S_SELECTION _IOWR('V', 62, struct v4l2_subdev_selection) +#define VIDIOC_SUBDEV_G_ROUTING _IOWR('V', 38, struct v4l2_subdev_routing) +#define VIDIOC_SUBDEV_S_ROUTING _IOWR('V', 39, struct v4l2_subdev_routing) /* The following ioctls are identical to the ioctls in videodev2.h */ #define VIDIOC_SUBDEV_G_STD _IOR('V', 23, v4l2_std_id) #define VIDIOC_SUBDEV_S_STD _IOW('V', 24, v4l2_std_id) |