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
  22 static 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  */
  31 static 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  */
  40 static inline bool is_new_manual(const struct v4l2_ctrl *master)
  41 {
  42         return master->is_auto && master->val == master->manual_mode_value;
  43 }
  44
  45 static 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 */
  56 void cur_to_new(struct v4l2_ctrl *ctrl);
  57 void cur_to_req(struct v4l2_ctrl_ref *ref);
  58 void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags);
  59 void new_to_req(struct v4l2_ctrl_ref *ref);
  60 int req_to_new(struct v4l2_ctrl_ref *ref);
  61 void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl);
  62 void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes);
  63 int 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);
  67 struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id);
  68 struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id);
  69 int check_range(enum v4l2_ctrl_type type,
  70                 s64 min, s64 max, u64 step, s64 def);
  71 void update_from_auto_cluster(struct v4l2_ctrl *master);
  72 int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
  73                        bool set, u32 ch_flags);
  74
  75 /* v4l2-ctrls-api.c */
  76 int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
  77                             struct v4l2_ext_controls *cs,
  78                             struct video_device *vdev);
  79 int 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 */
  85 void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl);
  86 void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl);
  87 int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
  88                              struct media_device *mdev, struct v4l2_ext_controls *cs);
  89 int 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