1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * V4L2 controls framework private header.
4 *
5 * Copyright (C) 2010-2021 Hans Verkuil <hverkuil-cisco@xs4all.nl>
6 */
7
8#ifndef _V4L2_CTRLS_PRIV_H_
9#define _V4L2_CTRLS_PRIV_H_
10
11#define dprintk(vdev, fmt, arg...) do { \
12 if (!WARN_ON(!(vdev)) && ((vdev)->dev_debug & V4L2_DEV_DEBUG_CTRL)) \
13 printk(KERN_DEBUG pr_fmt("%s: %s: " fmt), \
14 __func__, video_device_node_name(vdev), ##arg); \
15} while (0)
16
17#define has_op(master, op) \
18 ((master)->ops && (master)->ops->op)
19#define call_op(master, op) \
20 (has_op(master, op) ? (master)->ops->op(master) : 0)
21
22static inline u32 node2id(struct list_head *node)
23{
24 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
25}
26
27/*
28 * Small helper function to determine if the autocluster is set to manual
29 * mode.
30 */
31static inline bool is_cur_manual(const struct v4l2_ctrl *master)
32{
33 return master->is_auto && master->cur.val == master->manual_mode_value;
34}
35
36/*
37 * Small helper function to determine if the autocluster will be set to manual
38 * mode.
39 */
40static inline bool is_new_manual(const struct v4l2_ctrl *master)
41{
42 return master->is_auto && master->val == master->manual_mode_value;
43}
44
45static inline u32 user_flags(const struct v4l2_ctrl *ctrl)
46{
47 u32 flags = ctrl->flags;
48
49 if (ctrl->is_ptr)
50 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
51
52 return flags;
53}
54
55/* v4l2-ctrls-core.c */
56void cur_to_new(struct v4l2_ctrl *ctrl);
57void cur_to_req(struct v4l2_ctrl_ref *ref);
58void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags);
59void new_to_req(struct v4l2_ctrl_ref *ref);
60int req_to_new(struct v4l2_ctrl_ref *ref);
61void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl);
62void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes);
63int handler_new_ref(struct v4l2_ctrl_handler *hdl,
64 struct v4l2_ctrl *ctrl,
65 struct v4l2_ctrl_ref **ctrl_ref,
66 bool from_other_dev, bool allocate_req);
67struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id);
68struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id);
69int check_range(enum v4l2_ctrl_type type,
70 s64 min, s64 max, u64 step, s64 def);
71void update_from_auto_cluster(struct v4l2_ctrl *master);
72int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
73 bool set, u32 ch_flags);
74
75/* v4l2-ctrls-api.c */
76int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
77 struct v4l2_ext_controls *cs,
78 struct video_device *vdev);
79int try_set_ext_ctrls_common(struct v4l2_fh *fh,
80 struct v4l2_ctrl_handler *hdl,
81 struct v4l2_ext_controls *cs,
82 struct video_device *vdev, bool set);
83
84/* v4l2-ctrls-request.c */
85void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl);
86void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl);
87int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
88 struct media_device *mdev, struct v4l2_ext_controls *cs);
89int try_set_ext_ctrls_request(struct v4l2_fh *fh,
90 struct v4l2_ctrl_handler *hdl,
91 struct video_device *vdev,
92 struct media_device *mdev,
93 struct v4l2_ext_controls *cs, bool set);
94
95#endif
96

source code of linux/drivers/media/v4l2-core/v4l2-ctrls-priv.h