linux/drivers/media/v4l2-core/v4l2-ctrls-request.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * V4L2 controls framework Request API implementation.
 *
 * Copyright (C) 2018-2021  Hans Verkuil <[email protected]>
 */

#define pr_fmt(fmt) …

#include <linux/export.h>
#include <linux/slab.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>

#include "v4l2-ctrls-priv.h"

/* Initialize the request-related fields in a control handler */
void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl)
{ … }

/* Free the request-related fields in a control handler */
void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl)
{ … }

static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
				   const struct v4l2_ctrl_handler *from)
{ … }

static void v4l2_ctrl_request_queue(struct media_request_object *obj)
{ … }

static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
{ … }

static void v4l2_ctrl_request_release(struct media_request_object *obj)
{ … }

static const struct media_request_object_ops req_ops = …;

struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
						     struct v4l2_ctrl_handler *parent)
{ … }
EXPORT_SYMBOL_GPL(…);

struct v4l2_ctrl *
v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
{ … }
EXPORT_SYMBOL_GPL(…);

static int v4l2_ctrl_request_bind(struct media_request *req,
				  struct v4l2_ctrl_handler *hdl,
				  struct v4l2_ctrl_handler *from)
{ … }

static struct media_request_object *
v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
			struct media_request *req, bool set)
{ … }

int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
			     struct media_device *mdev, struct v4l2_ext_controls *cs)
{ … }

int try_set_ext_ctrls_request(struct v4l2_fh *fh,
			      struct v4l2_ctrl_handler *hdl,
			      struct video_device *vdev,
			      struct media_device *mdev,
			      struct v4l2_ext_controls *cs, bool set)
{ … }

void v4l2_ctrl_request_complete(struct media_request *req,
				struct v4l2_ctrl_handler *main_hdl)
{ … }
EXPORT_SYMBOL(…);

int v4l2_ctrl_request_setup(struct media_request *req,
			    struct v4l2_ctrl_handler *main_hdl)
{ … }
EXPORT_SYMBOL(…);