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linux-stable/include/media/v4l2-ioctl.h
Arnd Bergmann 8dbcc3fa38 media: v4l2: prepare compat-ioctl rework 
The v4l2-compat-ioctl32() currently takes an extra round trip through user
space pointers when converting the data structure formats. In particular,
this involves using the compat_alloc_user_space() and copy_in_user()
helpers that often lead to worse compat handlers compared to using
in_compat_syscall() checks when copying the data.

The native implementation already gained a simpler method to deal with
the conversion for the time32 conversion.  Hook into the same places to
provide a location for reading and writing user space data from inside
of the generic video_usercopy() helper.

Hans Verkuil rewrote the video_get_user() function here to simplify
the zeroing of the extra input fields and fixed a couple of bugs in
the original implementation.

[hverkuil: fix: CHECK: Please don't use multiple blank lines]

Co-developed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-11-16 10:31:05 +01:00

793 lines
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/* SPDX-License-Identifier: GPL-2.0 */
/*
*
* V 4 L 2 D R I V E R H E L P E R A P I
*
* Moved from videodev2.h
*
* Some commonly needed functions for drivers (v4l2-common.o module)
*/
#ifndef _V4L2_IOCTL_H
#define _V4L2_IOCTL_H
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/sched/signal.h>
#include <linux/compiler.h> /* need __user */
#include <linux/videodev2.h>
struct v4l2_fh;
/**
* struct v4l2_ioctl_ops - describe operations for each V4L2 ioctl
*
* @vidioc_querycap: pointer to the function that implements
* :ref:`VIDIOC_QUERYCAP <vidioc_querycap>` ioctl
* @vidioc_enum_fmt_vid_cap: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for video capture in single and multi plane mode
* @vidioc_enum_fmt_vid_overlay: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for video overlay
* @vidioc_enum_fmt_vid_out: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for video output in single and multi plane mode
* @vidioc_enum_fmt_sdr_cap: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for Software Defined Radio capture
* @vidioc_enum_fmt_sdr_out: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for Software Defined Radio output
* @vidioc_enum_fmt_meta_cap: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for metadata capture
* @vidioc_enum_fmt_meta_out: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
* for metadata output
* @vidioc_g_fmt_vid_cap: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in single plane mode
* @vidioc_g_fmt_vid_overlay: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay
* @vidioc_g_fmt_vid_out: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out
* in single plane mode
* @vidioc_g_fmt_vid_out_overlay: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
* @vidioc_g_fmt_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
* @vidioc_g_fmt_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
* @vidioc_g_fmt_sliced_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture
* @vidioc_g_fmt_sliced_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
* @vidioc_g_fmt_vid_cap_mplane: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in multiple plane mode
* @vidioc_g_fmt_vid_out_mplane: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out
* in multiplane plane mode
* @vidioc_g_fmt_sdr_cap: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio capture
* @vidioc_g_fmt_sdr_out: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio output
* @vidioc_g_fmt_meta_cap: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for metadata capture
* @vidioc_g_fmt_meta_out: pointer to the function that implements
* :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for metadata output
* @vidioc_s_fmt_vid_cap: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in single plane mode
* @vidioc_s_fmt_vid_overlay: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay
* @vidioc_s_fmt_vid_out: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out
* in single plane mode
* @vidioc_s_fmt_vid_out_overlay: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
* @vidioc_s_fmt_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
* @vidioc_s_fmt_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
* @vidioc_s_fmt_sliced_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture
* @vidioc_s_fmt_sliced_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
* @vidioc_s_fmt_vid_cap_mplane: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in multiple plane mode
* @vidioc_s_fmt_vid_out_mplane: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out
* in multiplane plane mode
* @vidioc_s_fmt_sdr_cap: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio capture
* @vidioc_s_fmt_sdr_out: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio output
* @vidioc_s_fmt_meta_cap: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for metadata capture
* @vidioc_s_fmt_meta_out: pointer to the function that implements
* :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for metadata output
* @vidioc_try_fmt_vid_cap: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in single plane mode
* @vidioc_try_fmt_vid_overlay: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
* @vidioc_try_fmt_vid_out: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out
* in single plane mode
* @vidioc_try_fmt_vid_out_overlay: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
* output
* @vidioc_try_fmt_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
* @vidioc_try_fmt_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
* @vidioc_try_fmt_sliced_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI
* capture
* @vidioc_try_fmt_sliced_vbi_out: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
* @vidioc_try_fmt_vid_cap_mplane: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture
* in multiple plane mode
* @vidioc_try_fmt_vid_out_mplane: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out
* in multiplane plane mode
* @vidioc_try_fmt_sdr_cap: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio capture
* @vidioc_try_fmt_sdr_out: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
* Radio output
* @vidioc_try_fmt_meta_cap: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for metadata capture
* @vidioc_try_fmt_meta_out: pointer to the function that implements
* :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for metadata output
* @vidioc_reqbufs: pointer to the function that implements
* :ref:`VIDIOC_REQBUFS <vidioc_reqbufs>` ioctl
* @vidioc_querybuf: pointer to the function that implements
* :ref:`VIDIOC_QUERYBUF <vidioc_querybuf>` ioctl
* @vidioc_qbuf: pointer to the function that implements
* :ref:`VIDIOC_QBUF <vidioc_qbuf>` ioctl
* @vidioc_expbuf: pointer to the function that implements
* :ref:`VIDIOC_EXPBUF <vidioc_expbuf>` ioctl
* @vidioc_dqbuf: pointer to the function that implements
* :ref:`VIDIOC_DQBUF <vidioc_qbuf>` ioctl
* @vidioc_create_bufs: pointer to the function that implements
* :ref:`VIDIOC_CREATE_BUFS <vidioc_create_bufs>` ioctl
* @vidioc_prepare_buf: pointer to the function that implements
* :ref:`VIDIOC_PREPARE_BUF <vidioc_prepare_buf>` ioctl
* @vidioc_overlay: pointer to the function that implements
* :ref:`VIDIOC_OVERLAY <vidioc_overlay>` ioctl
* @vidioc_g_fbuf: pointer to the function that implements
* :ref:`VIDIOC_G_FBUF <vidioc_g_fbuf>` ioctl
* @vidioc_s_fbuf: pointer to the function that implements
* :ref:`VIDIOC_S_FBUF <vidioc_g_fbuf>` ioctl
* @vidioc_streamon: pointer to the function that implements
* :ref:`VIDIOC_STREAMON <vidioc_streamon>` ioctl
* @vidioc_streamoff: pointer to the function that implements
* :ref:`VIDIOC_STREAMOFF <vidioc_streamon>` ioctl
* @vidioc_g_std: pointer to the function that implements
* :ref:`VIDIOC_G_STD <vidioc_g_std>` ioctl
* @vidioc_s_std: pointer to the function that implements
* :ref:`VIDIOC_S_STD <vidioc_g_std>` ioctl
* @vidioc_querystd: pointer to the function that implements
* :ref:`VIDIOC_QUERYSTD <vidioc_querystd>` ioctl
* @vidioc_enum_input: pointer to the function that implements
* :ref:`VIDIOC_ENUM_INPUT <vidioc_g_input>` ioctl
* @vidioc_g_input: pointer to the function that implements
* :ref:`VIDIOC_G_INPUT <vidioc_g_input>` ioctl
* @vidioc_s_input: pointer to the function that implements
* :ref:`VIDIOC_S_INPUT <vidioc_g_input>` ioctl
* @vidioc_enum_output: pointer to the function that implements
* :ref:`VIDIOC_ENUM_OUTPUT <vidioc_g_output>` ioctl
* @vidioc_g_output: pointer to the function that implements
* :ref:`VIDIOC_G_OUTPUT <vidioc_g_output>` ioctl
* @vidioc_s_output: pointer to the function that implements
* :ref:`VIDIOC_S_OUTPUT <vidioc_g_output>` ioctl
* @vidioc_queryctrl: pointer to the function that implements
* :ref:`VIDIOC_QUERYCTRL <vidioc_queryctrl>` ioctl
* @vidioc_query_ext_ctrl: pointer to the function that implements
* :ref:`VIDIOC_QUERY_EXT_CTRL <vidioc_queryctrl>` ioctl
* @vidioc_g_ctrl: pointer to the function that implements
* :ref:`VIDIOC_G_CTRL <vidioc_g_ctrl>` ioctl
* @vidioc_s_ctrl: pointer to the function that implements
* :ref:`VIDIOC_S_CTRL <vidioc_g_ctrl>` ioctl
* @vidioc_g_ext_ctrls: pointer to the function that implements
* :ref:`VIDIOC_G_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
* @vidioc_s_ext_ctrls: pointer to the function that implements
* :ref:`VIDIOC_S_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
* @vidioc_try_ext_ctrls: pointer to the function that implements
* :ref:`VIDIOC_TRY_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
* @vidioc_querymenu: pointer to the function that implements
* :ref:`VIDIOC_QUERYMENU <vidioc_queryctrl>` ioctl
* @vidioc_enumaudio: pointer to the function that implements
* :ref:`VIDIOC_ENUMAUDIO <vidioc_enumaudio>` ioctl
* @vidioc_g_audio: pointer to the function that implements
* :ref:`VIDIOC_G_AUDIO <vidioc_g_audio>` ioctl
* @vidioc_s_audio: pointer to the function that implements
* :ref:`VIDIOC_S_AUDIO <vidioc_g_audio>` ioctl
* @vidioc_enumaudout: pointer to the function that implements
* :ref:`VIDIOC_ENUMAUDOUT <vidioc_enumaudout>` ioctl
* @vidioc_g_audout: pointer to the function that implements
* :ref:`VIDIOC_G_AUDOUT <vidioc_g_audout>` ioctl
* @vidioc_s_audout: pointer to the function that implements
* :ref:`VIDIOC_S_AUDOUT <vidioc_g_audout>` ioctl
* @vidioc_g_modulator: pointer to the function that implements
* :ref:`VIDIOC_G_MODULATOR <vidioc_g_modulator>` ioctl
* @vidioc_s_modulator: pointer to the function that implements
* :ref:`VIDIOC_S_MODULATOR <vidioc_g_modulator>` ioctl
* @vidioc_g_pixelaspect: pointer to the function that implements
* the pixelaspect part of the :ref:`VIDIOC_CROPCAP <vidioc_cropcap>` ioctl
* @vidioc_g_selection: pointer to the function that implements
* :ref:`VIDIOC_G_SELECTION <vidioc_g_selection>` ioctl
* @vidioc_s_selection: pointer to the function that implements
* :ref:`VIDIOC_S_SELECTION <vidioc_g_selection>` ioctl
* @vidioc_g_jpegcomp: pointer to the function that implements
* :ref:`VIDIOC_G_JPEGCOMP <vidioc_g_jpegcomp>` ioctl
* @vidioc_s_jpegcomp: pointer to the function that implements
* :ref:`VIDIOC_S_JPEGCOMP <vidioc_g_jpegcomp>` ioctl
* @vidioc_g_enc_index: pointer to the function that implements
* :ref:`VIDIOC_G_ENC_INDEX <vidioc_g_enc_index>` ioctl
* @vidioc_encoder_cmd: pointer to the function that implements
* :ref:`VIDIOC_ENCODER_CMD <vidioc_encoder_cmd>` ioctl
* @vidioc_try_encoder_cmd: pointer to the function that implements
* :ref:`VIDIOC_TRY_ENCODER_CMD <vidioc_encoder_cmd>` ioctl
* @vidioc_decoder_cmd: pointer to the function that implements
* :ref:`VIDIOC_DECODER_CMD <vidioc_decoder_cmd>` ioctl
* @vidioc_try_decoder_cmd: pointer to the function that implements
* :ref:`VIDIOC_TRY_DECODER_CMD <vidioc_decoder_cmd>` ioctl
* @vidioc_g_parm: pointer to the function that implements
* :ref:`VIDIOC_G_PARM <vidioc_g_parm>` ioctl
* @vidioc_s_parm: pointer to the function that implements
* :ref:`VIDIOC_S_PARM <vidioc_g_parm>` ioctl
* @vidioc_g_tuner: pointer to the function that implements
* :ref:`VIDIOC_G_TUNER <vidioc_g_tuner>` ioctl
* @vidioc_s_tuner: pointer to the function that implements
* :ref:`VIDIOC_S_TUNER <vidioc_g_tuner>` ioctl
* @vidioc_g_frequency: pointer to the function that implements
* :ref:`VIDIOC_G_FREQUENCY <vidioc_g_frequency>` ioctl
* @vidioc_s_frequency: pointer to the function that implements
* :ref:`VIDIOC_S_FREQUENCY <vidioc_g_frequency>` ioctl
* @vidioc_enum_freq_bands: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FREQ_BANDS <vidioc_enum_freq_bands>` ioctl
* @vidioc_g_sliced_vbi_cap: pointer to the function that implements
* :ref:`VIDIOC_G_SLICED_VBI_CAP <vidioc_g_sliced_vbi_cap>` ioctl
* @vidioc_log_status: pointer to the function that implements
* :ref:`VIDIOC_LOG_STATUS <vidioc_log_status>` ioctl
* @vidioc_s_hw_freq_seek: pointer to the function that implements
* :ref:`VIDIOC_S_HW_FREQ_SEEK <vidioc_s_hw_freq_seek>` ioctl
* @vidioc_g_register: pointer to the function that implements
* :ref:`VIDIOC_DBG_G_REGISTER <vidioc_dbg_g_register>` ioctl
* @vidioc_s_register: pointer to the function that implements
* :ref:`VIDIOC_DBG_S_REGISTER <vidioc_dbg_g_register>` ioctl
* @vidioc_g_chip_info: pointer to the function that implements
* :ref:`VIDIOC_DBG_G_CHIP_INFO <vidioc_dbg_g_chip_info>` ioctl
* @vidioc_enum_framesizes: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FRAMESIZES <vidioc_enum_framesizes>` ioctl
* @vidioc_enum_frameintervals: pointer to the function that implements
* :ref:`VIDIOC_ENUM_FRAMEINTERVALS <vidioc_enum_frameintervals>` ioctl
* @vidioc_s_dv_timings: pointer to the function that implements
* :ref:`VIDIOC_S_DV_TIMINGS <vidioc_g_dv_timings>` ioctl
* @vidioc_g_dv_timings: pointer to the function that implements
* :ref:`VIDIOC_G_DV_TIMINGS <vidioc_g_dv_timings>` ioctl
* @vidioc_query_dv_timings: pointer to the function that implements
* :ref:`VIDIOC_QUERY_DV_TIMINGS <vidioc_query_dv_timings>` ioctl
* @vidioc_enum_dv_timings: pointer to the function that implements
* :ref:`VIDIOC_ENUM_DV_TIMINGS <vidioc_enum_dv_timings>` ioctl
* @vidioc_dv_timings_cap: pointer to the function that implements
* :ref:`VIDIOC_DV_TIMINGS_CAP <vidioc_dv_timings_cap>` ioctl
* @vidioc_g_edid: pointer to the function that implements
* :ref:`VIDIOC_G_EDID <vidioc_g_edid>` ioctl
* @vidioc_s_edid: pointer to the function that implements
* :ref:`VIDIOC_S_EDID <vidioc_g_edid>` ioctl
* @vidioc_subscribe_event: pointer to the function that implements
* :ref:`VIDIOC_SUBSCRIBE_EVENT <vidioc_subscribe_event>` ioctl
* @vidioc_unsubscribe_event: pointer to the function that implements
* :ref:`VIDIOC_UNSUBSCRIBE_EVENT <vidioc_unsubscribe_event>` ioctl
* @vidioc_default: pointed used to allow other ioctls
*/
struct v4l2_ioctl_ops {
/* ioctl callbacks */
/* VIDIOC_QUERYCAP handler */
int (*vidioc_querycap)(struct file *file, void *fh,
struct v4l2_capability *cap);
/* VIDIOC_ENUM_FMT handlers */
int (*vidioc_enum_fmt_vid_cap)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_out)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_sdr_cap)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_sdr_out)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_meta_cap)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_meta_out)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
/* VIDIOC_G_FMT handlers */
int (*vidioc_g_fmt_vid_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sdr_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sdr_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_meta_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_meta_out)(struct file *file, void *fh,
struct v4l2_format *f);
/* VIDIOC_S_FMT handlers */
int (*vidioc_s_fmt_vid_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sdr_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sdr_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_meta_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_meta_out)(struct file *file, void *fh,
struct v4l2_format *f);
/* VIDIOC_TRY_FMT handlers */
int (*vidioc_try_fmt_vid_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sdr_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sdr_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_meta_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_meta_out)(struct file *file, void *fh,
struct v4l2_format *f);
/* Buffer handlers */
int (*vidioc_reqbufs)(struct file *file, void *fh,
struct v4l2_requestbuffers *b);
int (*vidioc_querybuf)(struct file *file, void *fh,
struct v4l2_buffer *b);
int (*vidioc_qbuf)(struct file *file, void *fh,
struct v4l2_buffer *b);
int (*vidioc_expbuf)(struct file *file, void *fh,
struct v4l2_exportbuffer *e);
int (*vidioc_dqbuf)(struct file *file, void *fh,
struct v4l2_buffer *b);
int (*vidioc_create_bufs)(struct file *file, void *fh,
struct v4l2_create_buffers *b);
int (*vidioc_prepare_buf)(struct file *file, void *fh,
struct v4l2_buffer *b);
int (*vidioc_overlay)(struct file *file, void *fh, unsigned int i);
int (*vidioc_g_fbuf)(struct file *file, void *fh,
struct v4l2_framebuffer *a);
int (*vidioc_s_fbuf)(struct file *file, void *fh,
const struct v4l2_framebuffer *a);
/* Stream on/off */
int (*vidioc_streamon)(struct file *file, void *fh,
enum v4l2_buf_type i);
int (*vidioc_streamoff)(struct file *file, void *fh,
enum v4l2_buf_type i);
/*
* Standard handling
*
* Note: ENUMSTD is handled by videodev.c
*/
int (*vidioc_g_std)(struct file *file, void *fh, v4l2_std_id *norm);
int (*vidioc_s_std)(struct file *file, void *fh, v4l2_std_id norm);
int (*vidioc_querystd)(struct file *file, void *fh, v4l2_std_id *a);
/* Input handling */
int (*vidioc_enum_input)(struct file *file, void *fh,
struct v4l2_input *inp);
int (*vidioc_g_input)(struct file *file, void *fh, unsigned int *i);
int (*vidioc_s_input)(struct file *file, void *fh, unsigned int i);
/* Output handling */
int (*vidioc_enum_output)(struct file *file, void *fh,
struct v4l2_output *a);
int (*vidioc_g_output)(struct file *file, void *fh, unsigned int *i);
int (*vidioc_s_output)(struct file *file, void *fh, unsigned int i);
/* Control handling */
int (*vidioc_queryctrl)(struct file *file, void *fh,
struct v4l2_queryctrl *a);
int (*vidioc_query_ext_ctrl)(struct file *file, void *fh,
struct v4l2_query_ext_ctrl *a);
int (*vidioc_g_ctrl)(struct file *file, void *fh,
struct v4l2_control *a);
int (*vidioc_s_ctrl)(struct file *file, void *fh,
struct v4l2_control *a);
int (*vidioc_g_ext_ctrls)(struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_s_ext_ctrls)(struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_try_ext_ctrls)(struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_querymenu)(struct file *file, void *fh,
struct v4l2_querymenu *a);
/* Audio ioctls */
int (*vidioc_enumaudio)(struct file *file, void *fh,
struct v4l2_audio *a);
int (*vidioc_g_audio)(struct file *file, void *fh,
struct v4l2_audio *a);
int (*vidioc_s_audio)(struct file *file, void *fh,
const struct v4l2_audio *a);
/* Audio out ioctls */
int (*vidioc_enumaudout)(struct file *file, void *fh,
struct v4l2_audioout *a);
int (*vidioc_g_audout)(struct file *file, void *fh,
struct v4l2_audioout *a);
int (*vidioc_s_audout)(struct file *file, void *fh,
const struct v4l2_audioout *a);
int (*vidioc_g_modulator)(struct file *file, void *fh,
struct v4l2_modulator *a);
int (*vidioc_s_modulator)(struct file *file, void *fh,
const struct v4l2_modulator *a);
/* Crop ioctls */
int (*vidioc_g_pixelaspect)(struct file *file, void *fh,
int buf_type, struct v4l2_fract *aspect);
int (*vidioc_g_selection)(struct file *file, void *fh,
struct v4l2_selection *s);
int (*vidioc_s_selection)(struct file *file, void *fh,
struct v4l2_selection *s);
/* Compression ioctls */
int (*vidioc_g_jpegcomp)(struct file *file, void *fh,
struct v4l2_jpegcompression *a);
int (*vidioc_s_jpegcomp)(struct file *file, void *fh,
const struct v4l2_jpegcompression *a);
int (*vidioc_g_enc_index)(struct file *file, void *fh,
struct v4l2_enc_idx *a);
int (*vidioc_encoder_cmd)(struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
int (*vidioc_try_encoder_cmd)(struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
int (*vidioc_decoder_cmd)(struct file *file, void *fh,
struct v4l2_decoder_cmd *a);
int (*vidioc_try_decoder_cmd)(struct file *file, void *fh,
struct v4l2_decoder_cmd *a);
/* Stream type-dependent parameter ioctls */
int (*vidioc_g_parm)(struct file *file, void *fh,
struct v4l2_streamparm *a);
int (*vidioc_s_parm)(struct file *file, void *fh,
struct v4l2_streamparm *a);
/* Tuner ioctls */
int (*vidioc_g_tuner)(struct file *file, void *fh,
struct v4l2_tuner *a);
int (*vidioc_s_tuner)(struct file *file, void *fh,
const struct v4l2_tuner *a);
int (*vidioc_g_frequency)(struct file *file, void *fh,
struct v4l2_frequency *a);
int (*vidioc_s_frequency)(struct file *file, void *fh,
const struct v4l2_frequency *a);
int (*vidioc_enum_freq_bands)(struct file *file, void *fh,
struct v4l2_frequency_band *band);
/* Sliced VBI cap */
int (*vidioc_g_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_sliced_vbi_cap *a);
/* Log status ioctl */
int (*vidioc_log_status)(struct file *file, void *fh);
int (*vidioc_s_hw_freq_seek)(struct file *file, void *fh,
const struct v4l2_hw_freq_seek *a);
/* Debugging ioctls */
#ifdef CONFIG_VIDEO_ADV_DEBUG
int (*vidioc_g_register)(struct file *file, void *fh,
struct v4l2_dbg_register *reg);
int (*vidioc_s_register)(struct file *file, void *fh,
const struct v4l2_dbg_register *reg);
int (*vidioc_g_chip_info)(struct file *file, void *fh,
struct v4l2_dbg_chip_info *chip);
#endif
int (*vidioc_enum_framesizes)(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize);
int (*vidioc_enum_frameintervals)(struct file *file, void *fh,
struct v4l2_frmivalenum *fival);
/* DV Timings IOCTLs */
int (*vidioc_s_dv_timings)(struct file *file, void *fh,
struct v4l2_dv_timings *timings);
int (*vidioc_g_dv_timings)(struct file *file, void *fh,
struct v4l2_dv_timings *timings);
int (*vidioc_query_dv_timings)(struct file *file, void *fh,
struct v4l2_dv_timings *timings);
int (*vidioc_enum_dv_timings)(struct file *file, void *fh,
struct v4l2_enum_dv_timings *timings);
int (*vidioc_dv_timings_cap)(struct file *file, void *fh,
struct v4l2_dv_timings_cap *cap);
int (*vidioc_g_edid)(struct file *file, void *fh,
struct v4l2_edid *edid);
int (*vidioc_s_edid)(struct file *file, void *fh,
struct v4l2_edid *edid);
int (*vidioc_subscribe_event)(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub);
int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub);
/* For other private ioctls */
long (*vidioc_default)(struct file *file, void *fh,
bool valid_prio, unsigned int cmd, void *arg);
};
/* v4l debugging and diagnostics */
/* Device debug flags to be used with the video device debug attribute */
/* Just log the ioctl name + error code */
#define V4L2_DEV_DEBUG_IOCTL 0x01
/* Log the ioctl name arguments + error code */
#define V4L2_DEV_DEBUG_IOCTL_ARG 0x02
/* Log the file operations open, release, mmap and get_unmapped_area */
#define V4L2_DEV_DEBUG_FOP 0x04
/* Log the read and write file operations and the VIDIOC_(D)QBUF ioctls */
#define V4L2_DEV_DEBUG_STREAMING 0x08
/* Log poll() */
#define V4L2_DEV_DEBUG_POLL 0x10
/* Log controls */
#define V4L2_DEV_DEBUG_CTRL 0x20
/* Video standard functions */
/**
* v4l2_norm_to_name - Ancillary routine to analog TV standard name from its ID.
*
* @id: analog TV standard ID.
*
* Return: returns a string with the name of the analog TV standard.
* If the standard is not found or if @id points to multiple standard,
* it returns "Unknown".
*/
const char *v4l2_norm_to_name(v4l2_std_id id);
/**
* v4l2_video_std_frame_period - Ancillary routine that fills a
* struct &v4l2_fract pointer with the default framerate fraction.
*
* @id: analog TV standard ID.
* @frameperiod: struct &v4l2_fract pointer to be filled
*
*/
void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod);
/**
* v4l2_video_std_construct - Ancillary routine that fills in the fields of
* a &v4l2_standard structure according to the @id parameter.
*
* @vs: struct &v4l2_standard pointer to be filled
* @id: analog TV standard ID.
* @name: name of the standard to be used
*
* .. note::
*
* This ancillary routine is obsolete. Shouldn't be used on newer drivers.
*/
int v4l2_video_std_construct(struct v4l2_standard *vs,
int id, const char *name);
/**
* v4l_video_std_enumstd - Ancillary routine that fills in the fields of
* a &v4l2_standard structure according to the @id and @vs->index
* parameters.
*
* @vs: struct &v4l2_standard pointer to be filled.
* @id: analog TV standard ID.
*
*/
int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id);
/**
* v4l_printk_ioctl - Ancillary routine that prints the ioctl in a
* human-readable format.
*
* @prefix: prefix to be added at the ioctl prints.
* @cmd: ioctl name
*
* .. note::
*
* If prefix != %NULL, then it will issue a
* ``printk(KERN_DEBUG "%s: ", prefix)`` first.
*/
void v4l_printk_ioctl(const char *prefix, unsigned int cmd);
struct video_device;
/* names for fancy debug output */
extern const char *v4l2_field_names[];
extern const char *v4l2_type_names[];
#ifdef CONFIG_COMPAT
/**
* v4l2_compat_ioctl32 -32 Bits compatibility layer for 64 bits processors
*
* @file: Pointer to struct &file.
* @cmd: Ioctl name.
* @arg: Ioctl argument.
*/
long int v4l2_compat_ioctl32(struct file *file, unsigned int cmd,
unsigned long arg);
#endif
unsigned int v4l2_compat_translate_cmd(unsigned int cmd);
int v4l2_compat_get_user(void __user *arg, void *parg, unsigned int cmd);
int v4l2_compat_put_user(void __user *arg, void *parg, unsigned int cmd);
int v4l2_compat_get_array_args(struct file *file, void *mbuf,
void __user *user_ptr, size_t array_size,
unsigned int cmd, void *arg);
int v4l2_compat_put_array_args(struct file *file, void __user *user_ptr,
void *mbuf, size_t array_size,
unsigned int cmd, void *arg);
/**
* typedef v4l2_kioctl - Typedef used to pass an ioctl handler.
*
* @file: Pointer to struct &file.
* @cmd: Ioctl name.
* @arg: Ioctl argument.
*/
typedef long (*v4l2_kioctl)(struct file *file, unsigned int cmd, void *arg);
/**
* video_usercopy - copies data from/to userspace memory when an ioctl is
* issued.
*
* @file: Pointer to struct &file.
* @cmd: Ioctl name.
* @arg: Ioctl argument.
* @func: function that will handle the ioctl
*
* .. note::
*
* This routine should be used only inside the V4L2 core.
*/
long int video_usercopy(struct file *file, unsigned int cmd,
unsigned long int arg, v4l2_kioctl func);
/**
* video_ioctl2 - Handles a V4L2 ioctl.
*
* @file: Pointer to struct &file.
* @cmd: Ioctl name.
* @arg: Ioctl argument.
*
* Method used to hancle an ioctl. Should be used to fill the
* &v4l2_ioctl_ops.unlocked_ioctl on all V4L2 drivers.
*/
long int video_ioctl2(struct file *file,
unsigned int cmd, unsigned long int arg);
/*
* The user space interpretation of the 'v4l2_event' differs
* based on the 'time_t' definition on 32-bit architectures, so
* the kernel has to handle both.
* This is the old version for 32-bit architectures.
*/
struct v4l2_event_time32 {
__u32 type;
union {
struct v4l2_event_vsync vsync;
struct v4l2_event_ctrl ctrl;
struct v4l2_event_frame_sync frame_sync;
struct v4l2_event_src_change src_change;
struct v4l2_event_motion_det motion_det;
__u8 data[64];
} u;
__u32 pending;
__u32 sequence;
struct old_timespec32 timestamp;
__u32 id;
__u32 reserved[8];
};
#define VIDIOC_DQEVENT_TIME32 _IOR('V', 89, struct v4l2_event_time32)
struct v4l2_buffer_time32 {
__u32 index;
__u32 type;
__u32 bytesused;
__u32 flags;
__u32 field;
struct old_timeval32 timestamp;
struct v4l2_timecode timecode;
__u32 sequence;
/* memory location */
__u32 memory;
union {
__u32 offset;
unsigned long userptr;
struct v4l2_plane *planes;
__s32 fd;
} m;
__u32 length;
__u32 reserved2;
union {
__s32 request_fd;
__u32 reserved;
};
};
#define VIDIOC_QUERYBUF_TIME32 _IOWR('V', 9, struct v4l2_buffer_time32)
#define VIDIOC_QBUF_TIME32 _IOWR('V', 15, struct v4l2_buffer_time32)
#define VIDIOC_DQBUF_TIME32 _IOWR('V', 17, struct v4l2_buffer_time32)
#define VIDIOC_PREPARE_BUF_TIME32 _IOWR('V', 93, struct v4l2_buffer_time32)
#endif /* _V4L2_IOCTL_H */
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