by Hans Verkuil

[permalink] [raw]

Subject: Re: [PATCH v6 10/10] media: uapi: move MPEG-2 stateless controls out of staging

On 26/04/2021 05:35, Ezequiel Garcia wrote:
> Until now, the MPEG-2 V4L2 API was not exported as a public API,
> and only defined in a private media header (media/mpeg2-ctrls.h).
>
> After reviewing the MPEG-2 specification in detail, and reworking
> the controls so they match the MPEG-2 semantics properly,
> we can consider it ready.
>
> Signed-off-by: Ezequiel Garcia <[email protected]>
> ---
> .../media/v4l/ext-ctrls-codec-stateless.rst | 214 +++++++++++++++++
> .../media/v4l/ext-ctrls-codec.rst | 216 ------------------
> .../media/v4l/pixfmt-compressed.rst | 10 +-
> .../media/v4l/vidioc-g-ext-ctrls.rst | 12 +
> drivers/media/v4l2-core/v4l2-ctrls.c | 12 +-
> drivers/staging/media/hantro/hantro_drv.c | 6 +-
> .../media/hantro/hantro_g1_mpeg2_dec.c | 6 +-
> .../media/hantro/rk3399_vpu_hw_mpeg2_dec.c | 6 +-
> drivers/staging/media/sunxi/cedrus/cedrus.c | 6 +-
> .../staging/media/sunxi/cedrus/cedrus_dec.c | 6 +-
> include/media/mpeg2-ctrls.h | 126 ----------
> include/media/v4l2-ctrls.h | 1 -
> include/uapi/linux/v4l2-controls.h | 112 +++++++++
> include/uapi/linux/videodev2.h | 3 +
> 14 files changed, 367 insertions(+), 369 deletions(-)
> delete mode 100644 include/media/mpeg2-ctrls.h
>
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
> index 3fc04daa9ffb..eaaf96f5dde6 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
> @@ -1244,3 +1244,217 @@ FWHT Flags
> * - __u8
> - ``padding[3]``
> - Applications and drivers must set this to zero.
> +
> +.. _v4l2-codec-stateless-mpeg2:
> +
> +``V4L2_CID_STATELESS_MPEG2_SEQUENCE (struct)``
> + Specifies the sequence parameters (as extracted from the bitstream) for the
> + associated MPEG-2 slice data. This includes fields matching the syntax
> + elements from the sequence header and sequence extension parts of the
> + bitstream as specified by :ref:`mpeg2part2`.
> +
> +.. c:type:: v4l2_ctrl_mpeg2_sequence
> +
> +.. raw:: latex
> +
> + \small
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
> +
> +.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u16
> + - ``horizontal_size``
> + - The width of the displayable part of the frame's luminance component.
> + * - __u16
> + - ``vertical_size``
> + - The height of the displayable part of the frame's luminance component.
> + * - __u32
> + - ``vbv_buffer_size``
> + - Used to calculate the required size of the video buffering verifier,
> + defined (in bits) as: 16 * 1024 * vbv_buffer_size.
> + * - __u16
> + - ``profile_and_level_indication``
> + - The current profile and level indication as extracted from the
> + bitstream.
> + * - __u8
> + - ``chroma_format``
> + - The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
> + * - __u8
> + - ``flags``
> + - See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
> +
> +.. _mpeg2_sequence_flags:
> +
> +``MPEG-2 Sequence Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE``
> + - 0x00000001
> + - Indication that all the frames for the sequence are progressive instead
> + of interlaced.
> +
> +.. raw:: latex
> +
> + \normalsize
> +
> +``V4L2_CID_STATELESS_MPEG2_PICTURE (struct)``
> + Specifies the picture parameters (as extracted from the bitstream) for the
> + associated MPEG-2 slice data. This includes fields matching the syntax
> + elements from the picture header and picture coding extension parts of the
> + bitstream as specified by :ref:`mpeg2part2`.
> +
> +.. c:type:: v4l2_ctrl_mpeg2_picture
> +
> +.. raw:: latex
> +
> + \small
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
> +
> +.. flat-table:: struct v4l2_ctrl_mpeg2_picture
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u64
> + - ``backward_ref_ts``
> + - Timestamp of the V4L2 capture buffer to use as backward reference, used
> + with B-coded and P-coded frames. The timestamp refers to the
> + ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
> + :c:func:`v4l2_timeval_to_ns()` function to convert the struct
> + :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
> + * - __u64
> + - ``forward_ref_ts``
> + - Timestamp for the V4L2 capture buffer to use as forward reference, used
> + with B-coded frames. The timestamp refers to the ``timestamp`` field in
> + struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
> + function to convert the struct :c:type:`timeval` in struct
> + :c:type:`v4l2_buffer` to a __u64.
> + * - __u32
> + - ``flags``
> + - See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
> + * - __u8
> + - ``f_code[2][2]``
> + - Motion vector codes.
> + * - __u8
> + - ``picture_coding_type``
> + - Picture coding type for the frame covered by the current slice
> + (V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
> + V4L2_MPEG2_PICTURE_CODING_TYPE_B).
> + * - __u8
> + - ``picture_structure``
> + - Picture structure (1: interlaced top field, 2: interlaced bottom field,
> + 3: progressive frame).
> + * - __u8
> + - ``intra_dc_precision``
> + - Precision of Discrete Cosine transform (0: 8 bits precision,
> + 1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
> + * - __u8
> + - ``reserved``
> + - Applications and drivers must set this to zero.
> +
> +.. _mpeg2_picture_flags:
> +
> +``MPEG-2 Picture Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST``
> + - 0x00000001
> + - If set and it's an interlaced stream, top field is output first.
> + * - ``V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT``
> + - 0x00000002
> + - If set only frame-DCT and frame prediction are used.
> + * - ``V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV``
> + - 0x00000004
> + - If set motion vectors are coded for intra macroblocks.
> + * - ``V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE``
> + - 0x00000008
> + - This flag affects the inverse quantization process.
> + * - ``V4L2_MPEG2_PIC_FLAG_INTRA_VLC``
> + - 0x00000010
> + - This flag affects the decoding of transform coefficient data.
> + * - ``V4L2_MPEG2_PIC_FLAG_ALT_SCAN``
> + - 0x00000020
> + - This flag affects the decoding of transform coefficient data.
> + * - ``V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST``
> + - 0x00000040
> + - This flag affects the decoding process of progressive frames.
> + * - ``V4L2_MPEG2_PIC_FLAG_PROGRESSIVE``
> + - 0x00000080
> + - Indicates whether the current frame is progressive.
> +
> +.. raw:: latex
> +
> + \normalsize
> +
> +``V4L2_CID_STATELESS_MPEG2_QUANTISATION (struct)``
> + Specifies quantisation matrices, in zigzag scanning order, for the
> + associated MPEG-2 slice data. This control is initialized by the kernel
> + to the matrices default values. If a bitstream transmits a user-defined
> + quantisation matrices load, applications are expected to use this control.
> + Applications are also expected to set the control loading the default
> + values, if the quantisation matrices need to be reset, for instance on a
> + sequence header. This process is specified by section 6.3.7.
> + "Quant matrix extension" of the specification.
> +
> +.. c:type:: v4l2_ctrl_mpeg2_quantisation
> +
> +.. tabularcolumns:: |p{0.8cm}|p{8.0cm}|p{8.5cm}|
> +
> +.. cssclass:: longtable
> +
> +.. raw:: latex
> +
> + \small
> +
> +.. flat-table:: struct v4l2_ctrl_mpeg2_quantisation
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``intra_quantiser_matrix[64]``
> + - The quantisation matrix coefficients for intra-coded frames, in zigzag
> + scanning order. It is relevant for both luma and chroma components,
> + although it can be superseded by the chroma-specific matrix for
> + non-4:2:0 YUV formats.
> + * - __u8
> + - ``non_intra_quantiser_matrix[64]``
> + - The quantisation matrix coefficients for non-intra-coded frames, in
> + zigzag scanning order. It is relevant for both luma and chroma
> + components, although it can be superseded by the chroma-specific matrix
> + for non-4:2:0 YUV formats.
> + * - __u8
> + - ``chroma_intra_quantiser_matrix[64]``
> + - The quantisation matrix coefficients for the chominance component of
> + intra-coded frames, in zigzag scanning order. Only relevant for
> + non-4:2:0 YUV formats.
> + * - __u8
> + - ``chroma_non_intra_quantiser_matrix[64]``
> + - The quantisation matrix coefficients for the chrominance component of
> + non-intra-coded frames, in zigzag scanning order. Only relevant for
> + non-4:2:0 YUV formats.
> +
> +.. raw:: latex
> +
> + \normalsize
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index af12c869e304..a580ea953c4e 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -1606,222 +1606,6 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
> ``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)``
> Indicates bit rate (bps) for hierarchical coding layer 6 for H264 encoder.
>
> -.. _v4l2-mpeg-mpeg2:
> -
> -``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (struct)``
> - Specifies the sequence parameters (as extracted from the bitstream) for the
> - associated MPEG-2 slice data. This includes fields matching the syntax
> - elements from the sequence header and sequence extension parts of the
> - bitstream as specified by :ref:`mpeg2part2`.
> -
> - .. note::
> -
> - This compound control is not yet part of the public kernel API and
> - it is expected to change.
> -
> -.. c:type:: v4l2_ctrl_mpeg2_sequence
> -
> -.. cssclass:: longtable
> -
> -.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
> -
> -.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
> - :header-rows: 0
> - :stub-columns: 0
> - :widths: 1 1 2
> -
> - * - __u16
> - - ``horizontal_size``
> - - The width of the displayable part of the frame's luminance component.
> - * - __u16
> - - ``vertical_size``
> - - The height of the displayable part of the frame's luminance component.
> - * - __u32
> - - ``vbv_buffer_size``
> - - Used to calculate the required size of the video buffering verifier,
> - defined (in bits) as: 16 * 1024 * vbv_buffer_size.
> - * - __u16
> - - ``profile_and_level_indication``
> - - The current profile and level indication as extracted from the
> - bitstream.
> - * - __u8
> - - ``chroma_format``
> - - The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
> - * - __u8
> - - ``flags``
> - - See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
> -
> -.. _mpeg2_sequence_flags:
> -
> -``MPEG-2 Sequence Flags``
> -
> -.. cssclass:: longtable
> -
> -.. flat-table::
> - :header-rows: 0
> - :stub-columns: 0
> - :widths: 1 1 2
> -
> - * - ``V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE``
> - - 0x00000001
> - - Indication that all the frames for the sequence are progressive instead
> - of interlaced.
> -
> -``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (struct)``
> - Specifies the picture parameters (as extracted from the bitstream) for the
> - associated MPEG-2 slice data. This includes fields matching the syntax
> - elements from the picture header and picture coding extension parts of the
> - bitstream as specified by :ref:`mpeg2part2`.
> -
> - .. note::
> -
> - This compound control is not yet part of the public kernel API and
> - it is expected to change.
> -
> -.. c:type:: v4l2_ctrl_mpeg2_picture
> -
> -.. raw:: latex
> -
> - \small
> -
> -.. cssclass:: longtable
> -
> -.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
> -
> -.. flat-table:: struct v4l2_ctrl_mpeg2_picture
> - :header-rows: 0
> - :stub-columns: 0
> - :widths: 1 1 2
> -
> - * - __u64
> - - ``backward_ref_ts``
> - - Timestamp of the V4L2 capture buffer to use as backward reference, used
> - with B-coded and P-coded frames. The timestamp refers to the
> - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
> - :c:func:`v4l2_timeval_to_ns()` function to convert the struct
> - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
> - * - __u64
> - - ``forward_ref_ts``
> - - Timestamp for the V4L2 capture buffer to use as forward reference, used
> - with B-coded frames. The timestamp refers to the ``timestamp`` field in
> - struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
> - function to convert the struct :c:type:`timeval` in struct
> - :c:type:`v4l2_buffer` to a __u64.
> - * - __u32
> - - ``flags``
> - - See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
> - * - __u8
> - - ``f_code[2][2]``
> - - Motion vector codes.
> - * - __u8
> - - ``picture_coding_type``
> - - Picture coding type for the frame covered by the current slice
> - (V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
> - V4L2_MPEG2_PICTURE_CODING_TYPE_B).
> - * - __u8
> - - ``picture_structure``
> - - Picture structure (1: interlaced top field, 2: interlaced bottom field,
> - 3: progressive frame).
> - * - __u8
> - - ``intra_dc_precision``
> - - Precision of Discrete Cosine transform (0: 8 bits precision,
> - 1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
> - * - __u8
> - - ``reserved``
> - - Applications and drivers must set this to zero.
> -
> -
> -.. _mpeg2_picture_flags:
> -
> -``MPEG-2 Picture Flags``
> -
> -.. cssclass:: longtable
> -
> -.. flat-table::
> - :header-rows: 0
> - :stub-columns: 0
> - :widths: 1 1 2
> -
> - * - ``V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST``
> - - 0x00000001
> - - If set and it's an interlaced stream, top field is output first.
> - * - ``V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT``
> - - 0x00000002
> - - If set only frame-DCT and frame prediction are used.
> - * - ``V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV``
> - - 0x00000004
> - - If set motion vectors are coded for intra macroblocks.
> - * - ``V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE``
> - - 0x00000008
> - - This flag affects the inverse quantization process.
> - * - ``V4L2_MPEG2_PIC_FLAG_INTRA_VLC``
> - - 0x00000010
> - - This flag affects the decoding of transform coefficient data.
> - * - ``V4L2_MPEG2_PIC_FLAG_ALT_SCAN``
> - - 0x00000020
> - - This flag affects the decoding of transform coefficient data.
> - * - ``V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST``
> - - 0x00000040
> - - This flag affects the decoding process of progressive frames.
> - * - ``V4L2_MPEG2_PIC_FLAG_PROGRESSIVE``
> - - 0x00000080
> - - Indicates whether the current frame is progressive.
> -
> -.. raw:: latex
> -
> - \normalsize
> -
> -``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION (struct)``
> - Specifies quantisation matrices (as extracted from the bitstream) for the
> - associated MPEG-2 slice data.
> -
> - .. note::
> -
> - This compound control is not yet part of the public kernel API and
> - it is expected to change.
> -
> -.. c:type:: v4l2_ctrl_mpeg2_quantisation
> -
> -.. tabularcolumns:: |p{0.8cm}|p{8.0cm}|p{8.5cm}|
> -
> -.. cssclass:: longtable
> -
> -.. raw:: latex
> -
> - \small
> -
> -.. flat-table:: struct v4l2_ctrl_mpeg2_quantisation
> - :header-rows: 0
> - :stub-columns: 0
> - :widths: 1 1 2
> -
> - * - __u8
> - - ``intra_quantiser_matrix[64]``
> - - The quantisation matrix coefficients for intra-coded frames, in zigzag
> - scanning order. It is relevant for both luma and chroma components,
> - although it can be superseded by the chroma-specific matrix for
> - non-4:2:0 YUV formats.
> - * - __u8
> - - ``non_intra_quantiser_matrix[64]``
> - - The quantisation matrix coefficients for non-intra-coded frames, in
> - zigzag scanning order. It is relevant for both luma and chroma
> - components, although it can be superseded by the chroma-specific matrix
> - for non-4:2:0 YUV formats.
> - * - __u8
> - - ``chroma_intra_quantiser_matrix[64]``
> - - The quantisation matrix coefficients for the chominance component of
> - intra-coded frames, in zigzag scanning order. Only relevant for
> - non-4:2:0 YUV formats.
> - * - __u8
> - - ``chroma_non_intra_quantiser_matrix[64]``
> - - The quantisation matrix coefficients for the chrominance component of
> - non-intra-coded frames, in zigzag scanning order. Only relevant for
> - non-4:2:0 YUV formats.
> -
> -.. raw:: latex
> -
> - \normalsize
> -
> ``V4L2_CID_FWHT_I_FRAME_QP (integer)``
> Quantization parameter for an I frame for FWHT. Valid range: from 1
> to 31.
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> index 6c10a062adac..0ede39907ee2 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> @@ -112,13 +112,13 @@ Compressed Formats
> - 'MG2S'
> - MPEG-2 parsed slice data, as extracted from the MPEG-2 bitstream.
> This format is adapted for stateless video decoders that implement a
> - MPEG-2 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
> + MPEG-2 pipeline with the :ref:`stateless_decoder`.
> Metadata associated with the frame to decode is required to be passed
> - through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE`` and
> - ``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE`` controls.
> + through the ``V4L2_CID_STATELESS_MPEG2_SEQUENCE`` and
> + ``V4L2_CID_STATELESS_MPEG2_PICTURE`` controls.
> Quantisation matrices can optionally be specified through the
> - ``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION`` control.
> - See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`.
> + ``V4L2_CID_STATELESS_MPEG2_QUANTISATION`` control.
> + See the :ref:`associated Codec Control IDs <v4l2-codec-stateless-mpeg2>`.
> Exactly one output and one capture buffer must be provided for use with
> this pixel format. The output buffer must contain the appropriate number
> of macroblocks to decode a full corresponding frame to the matching
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> index 3ba22983d21f..2d6bc8d94380 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> @@ -221,6 +221,18 @@ still cause this situation.
> - ``p_vp8_frame``
> - A pointer to a struct :c:type:`v4l2_ctrl_vp8_frame`. Valid if this control is
> of type ``V4L2_CTRL_TYPE_VP8_FRAME``.
> + * - struct :c:type:`v4l2_ctrl_mpeg2_sequence` *
> + - ``p_mpeg2_sequence``
> + - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_sequence`. Valid if this control is
> + of type ``V4L2_CTRL_TYPE_MPEG2_SEQUENCE``.
> + * - struct :c:type:`v4l2_ctrl_mpeg2_picture` *
> + - ``p_mpeg2_picture``
> + - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_picture`. Valid if this control is
> + of type ``V4L2_CTRL_TYPE_MPEG2_PICTURE``.
> + * - struct :c:type:`v4l2_ctrl_mpeg2_quantisation` *
> + - ``p_mpeg2_quantisation``
> + - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_quantisation`. Valid if this control is
> + of type ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION``.
> * - struct :c:type:`v4l2_ctrl_hdr10_cll_info` *
> - ``p_hdr10_cll``
> - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_cll_info`. Valid if this control is
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index a693ff8dc3dc..d4e2c7318ee6 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -977,9 +977,6 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_MPEG_VIDEO_LTR_COUNT: return "LTR Count";
> case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX: return "Frame LTR Index";
> case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES: return "Use LTR Frames";
> - case V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE: return "MPEG-2 Sequence Header";
> - case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE: return "MPEG-2 Picture Header";
> - case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION: return "MPEG-2 Quantisation Matrices";
> case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
> case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value";
>
> @@ -1228,6 +1225,9 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_STATELESS_H264_DECODE_PARAMS: return "H264 Decode Parameters";
> case V4L2_CID_STATELESS_FWHT_PARAMS: return "FWHT Stateless Parameters";
> case V4L2_CID_STATELESS_VP8_FRAME: return "VP8 Frame Parameters";
> + case V4L2_CID_STATELESS_MPEG2_SEQUENCE: return "MPEG-2 Sequence Header";
> + case V4L2_CID_STATELESS_MPEG2_PICTURE: return "MPEG-2 Picture Header";
> + case V4L2_CID_STATELESS_MPEG2_QUANTISATION: return "MPEG-2 Quantisation Matrices";
>
> /* Colorimetry controls */
> /* Keep the order of the 'case's the same as in v4l2-controls.h! */
> @@ -1500,13 +1500,13 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_RDS_TX_ALT_FREQS:
> *type = V4L2_CTRL_TYPE_U32;
> break;
> - case V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE:
> + case V4L2_CID_STATELESS_MPEG2_SEQUENCE:
> *type = V4L2_CTRL_TYPE_MPEG2_SEQUENCE;
> break;
> - case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE:
> + case V4L2_CID_STATELESS_MPEG2_PICTURE:
> *type = V4L2_CTRL_TYPE_MPEG2_PICTURE;
> break;
> - case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION:
> + case V4L2_CID_STATELESS_MPEG2_QUANTISATION:
> *type = V4L2_CTRL_TYPE_MPEG2_QUANTISATION;
> break;
> case V4L2_CID_STATELESS_FWHT_PARAMS:
> diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> index f5fa7e0940c4..b48552bddb3a 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -289,17 +289,17 @@ static const struct hantro_ctrl controls[] = {
> }, {
> .codec = HANTRO_MPEG2_DECODER,
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE,
> + .id = V4L2_CID_STATELESS_MPEG2_SEQUENCE,
> },
> }, {
> .codec = HANTRO_MPEG2_DECODER,
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE,
> + .id = V4L2_CID_STATELESS_MPEG2_PICTURE,
> },
> }, {
> .codec = HANTRO_MPEG2_DECODER,
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION,
> + .id = V4L2_CID_STATELESS_MPEG2_QUANTISATION,
> },
> }, {
> .codec = HANTRO_VP8_DECODER,
> diff --git a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
> index 6d89cae7df45..f565e37e397a 100644
> --- a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
> +++ b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
> @@ -83,7 +83,7 @@ hantro_g1_mpeg2_dec_set_quantisation(struct hantro_dev *vpu,
> {
> struct v4l2_ctrl_mpeg2_quantisation *q;
>
> - q = hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION);
> + q = hantro_get_ctrl(ctx, V4L2_CID_STATELESS_MPEG2_QUANTISATION);
> hantro_mpeg2_dec_copy_qtable(ctx->mpeg2_dec.qtable.cpu, q);
> vdpu_write_relaxed(vpu, ctx->mpeg2_dec.qtable.dma, G1_REG_QTABLE_BASE);
> }
> @@ -160,9 +160,9 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
> hantro_start_prepare_run(ctx);
>
> seq = hantro_get_ctrl(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
> + V4L2_CID_STATELESS_MPEG2_SEQUENCE);
> pic = hantro_get_ctrl(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
> + V4L2_CID_STATELESS_MPEG2_PICTURE);
>
> reg = G1_REG_DEC_AXI_RD_ID(0) |
> G1_REG_DEC_TIMEOUT_E(1) |
> diff --git a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
> index d16d76760278..2527dce7eb18 100644
> --- a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
> +++ b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
> @@ -85,7 +85,7 @@ rk3399_vpu_mpeg2_dec_set_quantisation(struct hantro_dev *vpu,
> {
> struct v4l2_ctrl_mpeg2_quantisation *q;
>
> - q = hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION);
> + q = hantro_get_ctrl(ctx, V4L2_CID_STATELESS_MPEG2_QUANTISATION);
> hantro_mpeg2_dec_copy_qtable(ctx->mpeg2_dec.qtable.cpu, q);
> vdpu_write_relaxed(vpu, ctx->mpeg2_dec.qtable.dma, VDPU_REG_QTABLE_BASE);
> }
> @@ -162,9 +162,9 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
> hantro_start_prepare_run(ctx);
>
> seq = hantro_get_ctrl(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
> + V4L2_CID_STATELESS_MPEG2_SEQUENCE);
> pic = hantro_get_ctrl(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
> + V4L2_CID_STATELESS_MPEG2_PICTURE);
>
> reg = VDPU_REG_DEC_ADV_PRE_DIS(0) |
> VDPU_REG_DEC_SCMD_DIS(0) |
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index 4430c8fa2cc7..fa348c09f844 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -31,19 +31,19 @@
> static const struct cedrus_control cedrus_controls[] = {
> {
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE,
> + .id = V4L2_CID_STATELESS_MPEG2_SEQUENCE,
> },
> .codec = CEDRUS_CODEC_MPEG2,
> },
> {
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE,
> + .id = V4L2_CID_STATELESS_MPEG2_PICTURE,
> },
> .codec = CEDRUS_CODEC_MPEG2,
> },
> {
> .cfg = {
> - .id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION,
> + .id = V4L2_CID_STATELESS_MPEG2_QUANTISATION,
> },
> .codec = CEDRUS_CODEC_MPEG2,
> },
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> index e98185c1f5a7..97e410d92506 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> @@ -41,11 +41,11 @@ void cedrus_device_run(void *priv)
> switch (ctx->src_fmt.pixelformat) {
> case V4L2_PIX_FMT_MPEG2_SLICE:
> run.mpeg2.sequence = cedrus_find_control_data(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
> + V4L2_CID_STATELESS_MPEG2_SEQUENCE);
> run.mpeg2.picture = cedrus_find_control_data(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
> + V4L2_CID_STATELESS_MPEG2_PICTURE);
> run.mpeg2.quantisation = cedrus_find_control_data(ctx,
> - V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION);
> + V4L2_CID_STATELESS_MPEG2_QUANTISATION);
> break;
>
> case V4L2_PIX_FMT_H264_SLICE:
> diff --git a/include/media/mpeg2-ctrls.h b/include/media/mpeg2-ctrls.h
> deleted file mode 100644
> index c4cf1af5b73b..000000000000
> --- a/include/media/mpeg2-ctrls.h
> +++ /dev/null
> @@ -1,126 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -/*
> - * These are the MPEG2 state controls for use with stateless MPEG-2
> - * codec drivers.
> - *
> - * It turns out that these structs are not stable yet and will undergo
> - * more changes. So keep them private until they are stable and ready to
> - * become part of the official public API.
> - */
> -
> -#ifndef _MPEG2_CTRLS_H_
> -#define _MPEG2_CTRLS_H_
> -
> -#define V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION (V4L2_CID_CODEC_BASE+251)
> -#define V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (V4L2_CID_CODEC_BASE+252)
> -#define V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (V4L2_CID_CODEC_BASE+253)
> -
> -/* enum v4l2_ctrl_type type values */
> -#define V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE 0x0001
> -
> -/**
> - * struct v4l2_ctrl_mpeg2_sequence - MPEG-2 sequence header
> - *
> - * All the members on this structure match the sequence header and sequence
> - * extension syntaxes as specified by the MPEG-2 specification.
> - *
> - * Fields horizontal_size, vertical_size and vbv_buffer_size are a
> - * combination of respective _value and extension syntax elements,
> - * as described in section 6.3.3 "Sequence header".
> - *
> - * @horizontal_size: combination of elements horizontal_size_value and
> - * horizontal_size_extension.
> - * @vertical_size: combination of elements vertical_size_value and
> - * vertical_size_extension.
> - * @vbv_buffer_size: combination of elements vbv_buffer_size_value and
> - * vbv_buffer_size_extension.
> - * @profile_and_level_indication: see MPEG-2 specification.
> - * @chroma_format: see MPEG-2 specification.
> - * @flags: see V4L2_MPEG2_SEQ_FLAG_{}.
> - */
> -struct v4l2_ctrl_mpeg2_sequence {
> - __u16 horizontal_size;
> - __u16 vertical_size;
> - __u32 vbv_buffer_size;
> - __u16 profile_and_level_indication;
> - __u8 chroma_format;
> - __u8 flags;
> -};
> -
> -#define V4L2_MPEG2_PIC_CODING_TYPE_I 1
> -#define V4L2_MPEG2_PIC_CODING_TYPE_P 2
> -#define V4L2_MPEG2_PIC_CODING_TYPE_B 3
> -#define V4L2_MPEG2_PIC_CODING_TYPE_D 4
> -
> -#define V4L2_MPEG2_PIC_TOP_FIELD 0x1
> -#define V4L2_MPEG2_PIC_BOTTOM_FIELD 0x2
> -#define V4L2_MPEG2_PIC_FRAME 0x3
> -
> -#define V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST 0x0001
> -#define V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT 0x0002
> -#define V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV 0x0004
> -#define V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE 0x0008
> -#define V4L2_MPEG2_PIC_FLAG_INTRA_VLC 0x0010
> -#define V4L2_MPEG2_PIC_FLAG_ALT_SCAN 0x0020
> -#define V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST 0x0040
> -#define V4L2_MPEG2_PIC_FLAG_PROGRESSIVE 0x0080
> -
> -/**
> - * struct v4l2_ctrl_mpeg2_picture - MPEG-2 picture header
> - *
> - * All the members on this structure match the picture header and picture
> - * coding extension syntaxes as specified by the MPEG-2 specification.
> - *
> - * @backward_ref_ts: timestamp of the V4L2 capture buffer to use as
> - * reference for backward prediction.
> - * @forward_ref_ts: timestamp of the V4L2 capture buffer to use as
> - * reference for forward prediction. These timestamp refers to the
> - * timestamp field in struct v4l2_buffer. Use v4l2_timeval_to_ns()
> - * to convert the struct timeval to a __u64.
> - * @flags: see V4L2_MPEG2_PIC_FLAG_{}.
> - * @f_code[2][2]: see MPEG-2 specification.
> - * @picture_coding_type: see MPEG-2 specification.
> - * @picture_structure: see V4L2_MPEG2_PIC_{}_FIELD.
> - * @intra_dc_precision: see MPEG-2 specification.
> - * @reserved: padding field. Should be zeroed by applications.
> - */
> -struct v4l2_ctrl_mpeg2_picture {
> - __u64 backward_ref_ts;
> - __u64 forward_ref_ts;
> - __u32 flags;
> - __u8 f_code[2][2];
> - __u8 picture_coding_type;
> - __u8 picture_structure;
> - __u8 intra_dc_precision;
> - __u8 reserved;
> -};
> -
> -/**
> - * struct v4l2_ctrl_mpeg2_quantisation - MPEG-2 quantisation
> - *
> - * Quantization matrices as specified by section 6.3.7
> - * "Quant matrix extension".
> - *
> - * @intra_quantiser_matrix: The quantisation matrix coefficients
> - * for intra-coded frames, in zigzag scanning order. It is relevant
> - * for both luma and chroma components, although it can be superseded
> - * by the chroma-specific matrix for non-4:2:0 YUV formats.
> - * @non_intra_quantiser_matrix: The quantisation matrix coefficients
> - * for non-intra-coded frames, in zigzag scanning order. It is relevant
> - * for both luma and chroma components, although it can be superseded
> - * by the chroma-specific matrix for non-4:2:0 YUV formats.
> - * @chroma_intra_quantiser_matrix: The quantisation matrix coefficients
> - * for the chominance component of intra-coded frames, in zigzag scanning
> - * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
> - * @chroma_non_intra_quantiser_matrix: The quantisation matrix coefficients
> - * for the chrominance component of non-intra-coded frames, in zigzag scanning
> - * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
> - */
> -struct v4l2_ctrl_mpeg2_quantisation {
> - __u8 intra_quantiser_matrix[64];
> - __u8 non_intra_quantiser_matrix[64];
> - __u8 chroma_intra_quantiser_matrix[64];
> - __u8 chroma_non_intra_quantiser_matrix[64];
> -};
> -
> -#endif
> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> index 215e44172c66..575b59fbac77 100644
> --- a/include/media/v4l2-ctrls.h
> +++ b/include/media/v4l2-ctrls.h
> @@ -17,7 +17,6 @@
> * Include the stateless codec compound control definitions.
> * This will move to the public headers once this API is fully stable.
> */
> -#include <media/mpeg2-ctrls.h>
> #include <media/hevc-ctrls.h>
>
> /* forward references */
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index d43bec5f1afd..7c0cf9121669 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -1862,6 +1862,118 @@ struct v4l2_ctrl_vp8_frame {
> __u64 flags;
> };
>
> +/* Stateless MPEG-2 controls */
> +
> +#define V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE 0x0001

Since the flags field is a single byte, I would recommend that you write this
as 0x01 instead of 0x0001 to reflect that there are just 8 bits available.

> +
> +#define V4L2_CID_STATELESS_MPEG2_SEQUENCE (V4L2_CID_CODEC_STATELESS_BASE+220)
> +/**
> + * struct v4l2_ctrl_mpeg2_sequence - MPEG-2 sequence header
> + *
> + * All the members on this structure match the sequence header and sequence
> + * extension syntaxes as specified by the MPEG-2 specification.
> + *
> + * Fields horizontal_size, vertical_size and vbv_buffer_size are a
> + * combination of respective _value and extension syntax elements,
> + * as described in section 6.3.3 "Sequence header".
> + *
> + * @horizontal_size: combination of elements horizontal_size_value and
> + * horizontal_size_extension.
> + * @vertical_size: combination of elements vertical_size_value and
> + * vertical_size_extension.
> + * @vbv_buffer_size: combination of elements vbv_buffer_size_value and
> + * vbv_buffer_size_extension.
> + * @profile_and_level_indication: see MPEG-2 specification.
> + * @chroma_format: see MPEG-2 specification.
> + * @flags: see V4L2_MPEG2_SEQ_FLAG_{}.
> + */
> +struct v4l2_ctrl_mpeg2_sequence {
> + __u16 horizontal_size;
> + __u16 vertical_size;
> + __u32 vbv_buffer_size;
> + __u16 profile_and_level_indication;
> + __u8 chroma_format;
> + __u8 flags;
> +};
> +
> +#define V4L2_MPEG2_PIC_CODING_TYPE_I 1
> +#define V4L2_MPEG2_PIC_CODING_TYPE_P 2
> +#define V4L2_MPEG2_PIC_CODING_TYPE_B 3
> +#define V4L2_MPEG2_PIC_CODING_TYPE_D 4
> +
> +#define V4L2_MPEG2_PIC_TOP_FIELD 0x1
> +#define V4L2_MPEG2_PIC_BOTTOM_FIELD 0x2
> +#define V4L2_MPEG2_PIC_FRAME 0x3
> +
> +#define V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST 0x0001
> +#define V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT 0x0002
> +#define V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV 0x0004
> +#define V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE 0x0008
> +#define V4L2_MPEG2_PIC_FLAG_INTRA_VLC 0x0010
> +#define V4L2_MPEG2_PIC_FLAG_ALT_SCAN 0x0020
> +#define V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST 0x0040
> +#define V4L2_MPEG2_PIC_FLAG_PROGRESSIVE 0x0080
> +
> +#define V4L2_CID_STATELESS_MPEG2_PICTURE (V4L2_CID_CODEC_STATELESS_BASE+221)
> +/**
> + * struct v4l2_ctrl_mpeg2_picture - MPEG-2 picture header
> + *
> + * All the members on this structure match the picture header and picture
> + * coding extension syntaxes as specified by the MPEG-2 specification.
> + *
> + * @backward_ref_ts: timestamp of the V4L2 capture buffer to use as
> + * reference for backward prediction.
> + * @forward_ref_ts: timestamp of the V4L2 capture buffer to use as
> + * reference for forward prediction. These timestamp refers to the
> + * timestamp field in struct v4l2_buffer. Use v4l2_timeval_to_ns()
> + * to convert the struct timeval to a __u64.
> + * @flags: see V4L2_MPEG2_PIC_FLAG_{}.
> + * @f_code: see MPEG-2 specification.
> + * @picture_coding_type: see MPEG-2 specification.
> + * @picture_structure: see V4L2_MPEG2_PIC_{}_FIELD.
> + * @intra_dc_precision: see MPEG-2 specification.
> + * @reserved: padding field. Should be zeroed by applications.
> + */
> +struct v4l2_ctrl_mpeg2_picture {
> + __u64 backward_ref_ts;
> + __u64 forward_ref_ts;
> + __u32 flags;
> + __u8 f_code[2][2];
> + __u8 picture_coding_type;
> + __u8 picture_structure;
> + __u8 intra_dc_precision;
> + __u8 reserved;

pahole reports that the struct size is different between 32 and 64 bit
x86 architectures. The initial u64 fields will force the total struct size
to be a multiple of 8 bytes on x86_64, so it has to be padded with reserved[5].

While the 32 and 64 arm architectures have the same size, there too
4 bytes padding is applied, which you don't want.

Regards,

Hans

> +};
> +
> +#define V4L2_CID_STATELESS_MPEG2_QUANTISATION (V4L2_CID_CODEC_STATELESS_BASE+222)
> +/**
> + * struct v4l2_ctrl_mpeg2_quantisation - MPEG-2 quantisation
> + *
> + * Quantisation matrices as specified by section 6.3.7
> + * "Quant matrix extension".
> + *
> + * @intra_quantiser_matrix: The quantisation matrix coefficients
> + * for intra-coded frames, in zigzag scanning order. It is relevant
> + * for both luma and chroma components, although it can be superseded
> + * by the chroma-specific matrix for non-4:2:0 YUV formats.
> + * @non_intra_quantiser_matrix: The quantisation matrix coefficients
> + * for non-intra-coded frames, in zigzag scanning order. It is relevant
> + * for both luma and chroma components, although it can be superseded
> + * by the chroma-specific matrix for non-4:2:0 YUV formats.
> + * @chroma_intra_quantiser_matrix: The quantisation matrix coefficients
> + * for the chominance component of intra-coded frames, in zigzag scanning
> + * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
> + * @chroma_non_intra_quantiser_matrix: The quantisation matrix coefficients
> + * for the chrominance component of non-intra-coded frames, in zigzag scanning
> + * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
> + */
> +struct v4l2_ctrl_mpeg2_quantisation {
> + __u8 intra_quantiser_matrix[64];
> + __u8 non_intra_quantiser_matrix[64];
> + __u8 chroma_intra_quantiser_matrix[64];
> + __u8 chroma_non_intra_quantiser_matrix[64];
> +};
> +
> #define V4L2_CID_COLORIMETRY_CLASS_BASE (V4L2_CTRL_CLASS_COLORIMETRY | 0x900)
> #define V4L2_CID_COLORIMETRY_CLASS (V4L2_CTRL_CLASS_COLORIMETRY | 1)
>
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index d3bb18a3a51b..9260791b8438 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -1747,6 +1747,9 @@ struct v4l2_ext_control {
> struct v4l2_ctrl_h264_decode_params __user *p_h264_decode_params;
> struct v4l2_ctrl_fwht_params __user *p_fwht_params;
> struct v4l2_ctrl_vp8_frame __user *p_vp8_frame;
> + struct v4l2_ctrl_mpeg2_sequence __user *p_mpeg2_sequence;
> + struct v4l2_ctrl_mpeg2_picture __user *p_mpeg2_picture;
> + struct v4l2_ctrl_mpeg2_quantisation __user *p_mpeg2_quantisation;
> void __user *ptr;
> };
> } __attribute__ ((packed));
>