VIDIOC_SUBDEV_ENUM_MBUS_CODE — Enumerate media bus formats


int ioctl(int fd,
 int request,
 struct v4l2_subdev_mbus_code_enum * argp);



File descriptor returned by open().





To enumerate media bus formats available at a given sub-device pad applications initialize the pad, which and index fields of struct 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 error code 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.

Table A.104. struct v4l2_subdev_mbus_code_enum

__u32padPad number as reported by the media controller API.
__u32indexNumber of the format in the enumeration, set by the application.
__u32codeThe media bus format code, as defined in the section called “Media Bus Formats”.
__u32whichMedia bus format codes to be enumerated, from enum v4l2_subdev_format_whence.
__u32reserved[8]Reserved for future extensions. Applications and drivers must set the array to zero.

Return Value

On success 0 is returned, on error -1 and the errno variable is set appropriately. The generic error codes are described at the Generic Error Codes chapter.


The struct v4l2_subdev_mbus_code_enum pad references a non-existing pad, or the index field is out of bounds.