LXR linux/drivers/media/v4l2-core/v4l2-ctrls-priv.h

   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);
  60void 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 validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new);
  64int handler_new_ref(struct v4l2_ctrl_handler *hdl,
  65                    struct v4l2_ctrl *ctrl,
  66                    struct v4l2_ctrl_ref **ctrl_ref,
  67                    bool from_other_dev, bool allocate_req);
  68struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id);
  69struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id);
  70int check_range(enum v4l2_ctrl_type type,
  71                s64 min, s64 max, u64 step, s64 def);
  72void update_from_auto_cluster(struct v4l2_ctrl *master);
  73int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
  74                       bool set, u32 ch_flags);
  75
  76/* v4l2-ctrls-api.c */
  77int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
  78                            struct v4l2_ext_controls *cs,
  79                            struct video_device *vdev);
  80int try_set_ext_ctrls_common(struct v4l2_fh *fh,
  81                             struct v4l2_ctrl_handler *hdl,
  82                             struct v4l2_ext_controls *cs,
  83                             struct video_device *vdev, bool set);
  84
  85/* v4l2-ctrls-request.c */
  86void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl);
  87void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl);
  88int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
  89                             struct media_device *mdev, struct v4l2_ext_controls *cs);
  90int try_set_ext_ctrls_request(struct v4l2_fh *fh,
  91                              struct v4l2_ctrl_handler *hdl,
  92                              struct video_device *vdev,
  93                              struct media_device *mdev,
  94                              struct v4l2_ext_controls *cs, bool set);
  95
  96#endif
  97