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+.. Permission is granted to copy, distribute and/or modify this
+.. document under the terms of the GNU Free Documentation License,
+.. Version 1.1 or any later version published by the Free Software
+.. Foundation, with no Invariant Sections, no Front-Cover Texts
+.. and no Back-Cover Texts. A copy of the license is included at
+.. Documentation/userspace-api/media/fdl-appendix.rst.
+..
+.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
+
+.. _VIDIOC_SUBDEV_ENUM_MBUS_CODE:
+
+**********************************
+ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE
+**********************************
+
+Name
+====
+
+VIDIOC_SUBDEV_ENUM_MBUS_CODE - Enumerate media bus formats
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUM_MBUS_CODE, struct v4l2_subdev_mbus_code_enum * argp )
+ :name: VIDIOC_SUBDEV_ENUM_MBUS_CODE
+
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :ref:`open() <func-open>`.
+
+``argp``
+ Pointer to struct :c:type:`v4l2_subdev_mbus_code_enum`.
+
+
+Description
+===========
+
+To enumerate media bus formats available at a given sub-device pad
+applications initialize the ``pad``, ``which`` and ``index`` fields of
+struct
+:c:type:`v4l2_subdev_mbus_code_enum` and
+call the :ref:`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 :ref:`VIDIOC_SUBDEV_G_FMT` for more
+information about the try formats.
+
+
+.. c:type:: v4l2_subdev_mbus_code_enum
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_mbus_code_enum
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+ * - __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
+ :ref:`v4l2-mbus-format`.
+ * - __u32
+ - ``which``
+ - Media bus format codes to be enumerated, from enum
+ :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+ * - __u32
+ - ``reserved``\ [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
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+ The struct
+ :c:type:`v4l2_subdev_mbus_code_enum`
+ ``pad`` references a non-existing pad, or the ``index`` field is out
+ of bounds.