ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE

&manvol;

VIDIOC_SUBDEV_ENUM_MBUS_CODE

Enumerate media bus formats

    	int ioctl
    	int fd
    	int request
    	struct v4l2_subdev_mbus_code_enum *
    	argp

## Arguments

`fd`

- &fd;

`request`

- VIDIOC_SUBDEV_ENUM_MBUS_CODE

`argp`

## Description

To enumerate media bus formats available at a given sub-device pad applications initialize the pad, which and index fields of &v4l2-subdev-mbus-code-enum; and call the `VIDIOC_SUBDEV_ENUM_MBUS_CODE` ioctl with a pointer to this structure. Drivers fill the rest of the structure or return an &EINVAL; if either the pad or index are invalid. All media bus formats are enumerable by beginning at index zero and incrementing by one until EINVAL is returned.

Available media bus formats may depend on the current 'try' formats at other pads of the sub-device, as well as on the current active links. See &VIDIOC-SUBDEV-G-FMT; for more information about the try formats.

## struct v4l2_subdev_mbus_code_enum

&cs-str;
__u32 | pad | Pad number as reported by the media controller API.
__u32 | index | Number of the format in the enumeration, set by the application.
__u32 | code | The media bus format code, as defined in v4l2-mbus-format.
__u32 | which | Media bus format codes to be enumerated, from &v4l2-subdev-format-whence;.
__u32 | reserved[8] | Reserved for future extensions. Applications and drivers must set the array to zero.

&return-value;

EINVAL

- The &v4l2-subdev-mbus-code-enum; pad references a non-existing pad, or the index field is out of bounds.