// SPDX-License-Identifier: GPL-2.0-only /* * V4L2 sub-device * * Copyright (C) 2010 Nokia Corporation * * Contact: Laurent Pinchart * Sakari Ailus */ #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) { if (sd->entity.num_pads) { fh->pad = v4l2_subdev_alloc_pad_config(sd); if (fh->pad == NULL) return -ENOMEM; } return 0; } static void subdev_fh_free(struct v4l2_subdev_fh *fh) { v4l2_subdev_free_pad_config(fh->pad); fh->pad = NULL; } static int subdev_open(struct file *file) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_subdev_fh *subdev_fh; int ret; subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); if (subdev_fh == NULL) return -ENOMEM; ret = subdev_fh_init(subdev_fh, sd); if (ret) { kfree(subdev_fh); return ret; } v4l2_fh_init(&subdev_fh->vfh, vdev); v4l2_fh_add(&subdev_fh->vfh); file->private_data = &subdev_fh->vfh; #if defined(CONFIG_MEDIA_CONTROLLER) if (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) { struct module *owner; owner = sd->entity.graph_obj.mdev->dev->driver->owner; if (!try_module_get(owner)) { ret = -EBUSY; goto err; } subdev_fh->owner = owner; } #endif if (sd->internal_ops && sd->internal_ops->open) { ret = sd->internal_ops->open(sd, subdev_fh); if (ret < 0) goto err; } return 0; err: module_put(subdev_fh->owner); v4l2_fh_del(&subdev_fh->vfh); v4l2_fh_exit(&subdev_fh->vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); return ret; } static int subdev_close(struct file *file) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_fh *vfh = file->private_data; struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); if (sd->internal_ops && sd->internal_ops->close) sd->internal_ops->close(sd, subdev_fh); module_put(subdev_fh->owner); v4l2_fh_del(vfh); v4l2_fh_exit(vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); file->private_data = NULL; return 0; } #else /* CONFIG_VIDEO_V4L2_SUBDEV_API */ static int subdev_open(struct file *file) { return -ENODEV; } static int subdev_close(struct file *file) { return -ENODEV; } #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ static inline int check_which(u32 which) { if (which != V4L2_SUBDEV_FORMAT_TRY && which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; return 0; } static inline int check_pad(struct v4l2_subdev *sd, u32 pad) { #if defined(CONFIG_MEDIA_CONTROLLER) if (sd->entity.num_pads) { if (pad >= sd->entity.num_pads) return -EINVAL; return 0; } #endif /* allow pad 0 on subdevices not registered as media entities */ if (pad > 0) return -EINVAL; return 0; } static int check_cfg(u32 which, struct v4l2_subdev_pad_config *cfg) { if (which == V4L2_SUBDEV_FORMAT_TRY && !cfg) return -EINVAL; return 0; } static inline int check_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { if (!format) return -EINVAL; return check_which(format->which) ? : check_pad(sd, format->pad) ? : check_cfg(format->which, cfg); } static int call_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { return check_format(sd, cfg, format) ? : sd->ops->pad->get_fmt(sd, cfg, format); } static int call_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { return check_format(sd, cfg, format) ? : sd->ops->pad->set_fmt(sd, cfg, format); } static int call_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { if (!code) return -EINVAL; return check_which(code->which) ? : check_pad(sd, code->pad) ? : check_cfg(code->which, cfg) ? : sd->ops->pad->enum_mbus_code(sd, cfg, code); } static int call_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { if (!fse) return -EINVAL; return check_which(fse->which) ? : check_pad(sd, fse->pad) ? : check_cfg(fse->which, cfg) ? : sd->ops->pad->enum_frame_size(sd, cfg, fse); } static inline int check_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { if (!fi) return -EINVAL; return check_pad(sd, fi->pad); } static int call_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { return check_frame_interval(sd, fi) ? : sd->ops->video->g_frame_interval(sd, fi); } static int call_s_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { return check_frame_interval(sd, fi) ? : sd->ops->video->s_frame_interval(sd, fi); } static int call_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_interval_enum *fie) { if (!fie) return -EINVAL; return check_which(fie->which) ? : check_pad(sd, fie->pad) ? : check_cfg(fie->which, cfg) ? : sd->ops->pad->enum_frame_interval(sd, cfg, fie); } static inline int check_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { if (!sel) return -EINVAL; return check_which(sel->which) ? : check_pad(sd, sel->pad) ? : check_cfg(sel->which, cfg); } static int call_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { return check_selection(sd, cfg, sel) ? : sd->ops->pad->get_selection(sd, cfg, sel); } static int call_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { return check_selection(sd, cfg, sel) ? : sd->ops->pad->set_selection(sd, cfg, sel); } static inline int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) { if (!edid) return -EINVAL; if (edid->blocks && edid->edid == NULL) return -EINVAL; return check_pad(sd, edid->pad); } static int call_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) { return check_edid(sd, edid) ? : sd->ops->pad->get_edid(sd, edid); } static int call_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) { return check_edid(sd, edid) ? : sd->ops->pad->set_edid(sd, edid); } static int call_dv_timings_cap(struct v4l2_subdev *sd, struct v4l2_dv_timings_cap *cap) { if (!cap) return -EINVAL; return check_pad(sd, cap->pad) ? : sd->ops->pad->dv_timings_cap(sd, cap); } static int call_enum_dv_timings(struct v4l2_subdev *sd, struct v4l2_enum_dv_timings *dvt) { if (!dvt) return -EINVAL; return check_pad(sd, dvt->pad) ? : sd->ops->pad->enum_dv_timings(sd, dvt); } static int call_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_mbus_config *config) { return check_pad(sd, pad) ? : sd->ops->pad->get_mbus_config(sd, pad, config); } static int call_set_mbus_config(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_mbus_config *config) { return check_pad(sd, pad) ? : sd->ops->pad->get_mbus_config(sd, pad, config); } static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = { .get_fmt = call_get_fmt, .set_fmt = call_set_fmt, .enum_mbus_code = call_enum_mbus_code, .enum_frame_size = call_enum_frame_size, .enum_frame_interval = call_enum_frame_interval, .get_selection = call_get_selection, .set_selection = call_set_selection, .get_edid = call_get_edid, .set_edid = call_set_edid, .dv_timings_cap = call_dv_timings_cap, .enum_dv_timings = call_enum_dv_timings, .get_mbus_config = call_get_mbus_config, .set_mbus_config = call_set_mbus_config, }; static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = { .g_frame_interval = call_g_frame_interval, .s_frame_interval = call_s_frame_interval, }; const struct v4l2_subdev_ops v4l2_subdev_call_wrappers = { .pad = &v4l2_subdev_call_pad_wrappers, .video = &v4l2_subdev_call_video_wrappers, }; EXPORT_SYMBOL(v4l2_subdev_call_wrappers); #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_fh *vfh = file->private_data; struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); bool ro_subdev = test_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags); int rval; switch (cmd) { case VIDIOC_SUBDEV_QUERYCAP: { struct v4l2_subdev_capability *cap = arg; memset(cap->reserved, 0, sizeof(cap->reserved)); cap->version = LINUX_VERSION_CODE; cap->capabilities = ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0; return 0; } case VIDIOC_QUERYCTRL: /* * TODO: this really should be folded into v4l2_queryctrl (this * currently returns -EINVAL for NULL control handlers). * However, v4l2_queryctrl() is still called directly by * drivers as well and until that has been addressed I believe * it is safer to do the check here. The same is true for the * other control ioctls below. */ if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_queryctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERY_EXT_CTRL: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERYMENU: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_querymenu(vfh->ctrl_handler, arg); case VIDIOC_G_CTRL: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_g_ctrl(vfh->ctrl_handler, arg); case VIDIOC_S_CTRL: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); case VIDIOC_G_EXT_CTRLS: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_g_ext_ctrls(vfh->ctrl_handler, vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_S_EXT_CTRLS: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_TRY_EXT_CTRLS: if (!vfh->ctrl_handler) return -ENOTTY; return v4l2_try_ext_ctrls(vfh->ctrl_handler, vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_DQEVENT: if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) return -ENOIOCTLCMD; return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); case VIDIOC_DQEVENT_TIME32: { struct v4l2_event_time32 *ev32 = arg; struct v4l2_event ev = { }; if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) return -ENOIOCTLCMD; rval = v4l2_event_dequeue(vfh, &ev, file->f_flags & O_NONBLOCK); *ev32 = (struct v4l2_event_time32) { .type = ev.type, .pending = ev.pending, .sequence = ev.sequence, .timestamp.tv_sec = ev.timestamp.tv_sec, .timestamp.tv_nsec = ev.timestamp.tv_nsec, .id = ev.id, }; memcpy(&ev32->u, &ev.u, sizeof(ev.u)); memcpy(&ev32->reserved, &ev.reserved, sizeof(ev.reserved)); return rval; } case VIDIOC_SUBSCRIBE_EVENT: return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); case VIDIOC_UNSUBSCRIBE_EVENT: return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); #ifdef CONFIG_VIDEO_ADV_DEBUG case VIDIOC_DBG_G_REGISTER: { struct v4l2_dbg_register *p = arg; if (!capable(CAP_SYS_ADMIN)) return -EPERM; return v4l2_subdev_call(sd, core, g_register, p); } case VIDIOC_DBG_S_REGISTER: { struct v4l2_dbg_register *p = arg; if (!capable(CAP_SYS_ADMIN)) return -EPERM; return v4l2_subdev_call(sd, core, s_register, p); } case VIDIOC_DBG_G_CHIP_INFO: { struct v4l2_dbg_chip_info *p = arg; if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr) return -EINVAL; if (sd->ops->core && sd->ops->core->s_register) p->flags |= V4L2_CHIP_FL_WRITABLE; if (sd->ops->core && sd->ops->core->g_register) p->flags |= V4L2_CHIP_FL_READABLE; strscpy(p->name, sd->name, sizeof(p->name)); return 0; } #endif case VIDIOC_LOG_STATUS: { int ret; pr_info("%s: ================= START STATUS =================\n", sd->name); ret = v4l2_subdev_call(sd, core, log_status); pr_info("%s: ================== END STATUS ==================\n", sd->name); return ret; } case VIDIOC_SUBDEV_G_FMT: { struct v4l2_subdev_format *format = arg; memset(format->reserved, 0, sizeof(format->reserved)); memset(format->format.reserved, 0, sizeof(format->format.reserved)); return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format); } case VIDIOC_SUBDEV_S_FMT: { struct v4l2_subdev_format *format = arg; if (format->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; memset(format->reserved, 0, sizeof(format->reserved)); memset(format->format.reserved, 0, sizeof(format->format.reserved)); return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format); } case VIDIOC_SUBDEV_G_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; sel.target = V4L2_SEL_TGT_CROP; rval = v4l2_subdev_call( sd, pad, get_selection, subdev_fh->pad, &sel); crop->rect = sel.r; return rval; } case VIDIOC_SUBDEV_S_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; if (crop->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; sel.target = V4L2_SEL_TGT_CROP; sel.r = crop->rect; rval = v4l2_subdev_call( sd, pad, set_selection, subdev_fh->pad, &sel); crop->rect = sel.r; return rval; } case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { struct v4l2_subdev_mbus_code_enum *code = arg; memset(code->reserved, 0, sizeof(code->reserved)); return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad, code); } case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { struct v4l2_subdev_frame_size_enum *fse = arg; memset(fse->reserved, 0, sizeof(fse->reserved)); return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad, fse); } case VIDIOC_SUBDEV_G_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; memset(fi->reserved, 0, sizeof(fi->reserved)); return v4l2_subdev_call(sd, video, g_frame_interval, arg); } case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; if (ro_subdev) return -EPERM; memset(fi->reserved, 0, sizeof(fi->reserved)); return v4l2_subdev_call(sd, video, s_frame_interval, arg); } case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval_enum *fie = arg; memset(fie->reserved, 0, sizeof(fie->reserved)); return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad, fie); } case VIDIOC_SUBDEV_G_SELECTION: { struct v4l2_subdev_selection *sel = arg; memset(sel->reserved, 0, sizeof(sel->reserved)); return v4l2_subdev_call( sd, pad, get_selection, subdev_fh->pad, sel); } case VIDIOC_SUBDEV_S_SELECTION: { struct v4l2_subdev_selection *sel = arg; if (sel->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; memset(sel->reserved, 0, sizeof(sel->reserved)); return v4l2_subdev_call( sd, pad, set_selection, subdev_fh->pad, sel); } case VIDIOC_G_EDID: { struct v4l2_subdev_edid *edid = arg; return v4l2_subdev_call(sd, pad, get_edid, edid); } case VIDIOC_S_EDID: { struct v4l2_subdev_edid *edid = arg; return v4l2_subdev_call(sd, pad, set_edid, edid); } case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { struct v4l2_dv_timings_cap *cap = arg; return v4l2_subdev_call(sd, pad, dv_timings_cap, cap); } case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: { struct v4l2_enum_dv_timings *dvt = arg; return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt); } case VIDIOC_SUBDEV_QUERY_DV_TIMINGS: return v4l2_subdev_call(sd, video, query_dv_timings, arg); case VIDIOC_SUBDEV_G_DV_TIMINGS: return v4l2_subdev_call(sd, video, g_dv_timings, arg); case VIDIOC_SUBDEV_S_DV_TIMINGS: if (ro_subdev) return -EPERM; return v4l2_subdev_call(sd, video, s_dv_timings, arg); case VIDIOC_SUBDEV_G_STD: return v4l2_subdev_call(sd, video, g_std, arg); case VIDIOC_SUBDEV_S_STD: { v4l2_std_id *std = arg; if (ro_subdev) return -EPERM; return v4l2_subdev_call(sd, video, s_std, *std); } case VIDIOC_SUBDEV_ENUMSTD: { struct v4l2_standard *p = arg; v4l2_std_id id; if (v4l2_subdev_call(sd, video, g_tvnorms, &id)) return -EINVAL; return v4l_video_std_enumstd(p, id); } case VIDIOC_SUBDEV_QUERYSTD: return v4l2_subdev_call(sd, video, querystd, arg); default: return v4l2_subdev_call(sd, core, ioctl, cmd, arg); } return 0; } static long subdev_do_ioctl_lock(struct file *file, unsigned int cmd, void *arg) { struct video_device *vdev = video_devdata(file); struct mutex *lock = vdev->lock; long ret = -ENODEV; if (lock && mutex_lock_interruptible(lock)) return -ERESTARTSYS; if (video_is_registered(vdev)) ret = subdev_do_ioctl(file, cmd, arg); if (lock) mutex_unlock(lock); return ret; } static long subdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock); } #ifdef CONFIG_COMPAT static long subdev_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg); } #endif #else /* CONFIG_VIDEO_V4L2_SUBDEV_API */ static long subdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { return -ENODEV; } #ifdef CONFIG_COMPAT static long subdev_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg) { return -ENODEV; } #endif #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ static __poll_t subdev_poll(struct file *file, poll_table *wait) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_fh *fh = file->private_data; if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) return EPOLLERR; poll_wait(file, &fh->wait, wait); if (v4l2_event_pending(fh)) return EPOLLPRI; return 0; } const struct v4l2_file_operations v4l2_subdev_fops = { .owner = THIS_MODULE, .open = subdev_open, .unlocked_ioctl = subdev_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = subdev_compat_ioctl32, #endif .release = subdev_close, .poll = subdev_poll, }; #ifdef CONFIG_MEDIA_CONTROLLER int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity, struct fwnode_endpoint *endpoint) { struct fwnode_handle *fwnode; struct v4l2_subdev *sd; if (!is_media_entity_v4l2_subdev(entity)) return -EINVAL; sd = media_entity_to_v4l2_subdev(entity); fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode); fwnode_handle_put(fwnode); if (dev_fwnode(sd->dev) == fwnode) return endpoint->port; return -ENXIO; } EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1); int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, struct media_link *link, struct v4l2_subdev_format *source_fmt, struct v4l2_subdev_format *sink_fmt) { /* The width, height and code must match. */ if (source_fmt->format.width != sink_fmt->format.width || source_fmt->format.height != sink_fmt->format.height || source_fmt->format.code != sink_fmt->format.code) return -EPIPE; /* The field order must match, or the sink field order must be NONE * to support interlaced hardware connected to bridges that support * progressive formats only. */ if (source_fmt->format.field != sink_fmt->format.field && sink_fmt->format.field != V4L2_FIELD_NONE) return -EPIPE; return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); static int v4l2_subdev_link_validate_get_format(struct media_pad *pad, struct v4l2_subdev_format *fmt) { if (is_media_entity_v4l2_subdev(pad->entity)) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(pad->entity); fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; fmt->pad = pad->index; return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); } WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L, "Driver bug! Wrong media entity type 0x%08x, entity %s\n", pad->entity->function, pad->entity->name); return -EINVAL; } int v4l2_subdev_link_validate(struct media_link *link) { struct v4l2_subdev *sink; struct v4l2_subdev_format sink_fmt, source_fmt; int rval; rval = v4l2_subdev_link_validate_get_format( link->source, &source_fmt); if (rval < 0) return 0; rval = v4l2_subdev_link_validate_get_format( link->sink, &sink_fmt); if (rval < 0) return 0; sink = media_entity_to_v4l2_subdev(link->sink->entity); rval = v4l2_subdev_call(sink, pad, link_validate, link, &source_fmt, &sink_fmt); if (rval != -ENOIOCTLCMD) return rval; return v4l2_subdev_link_validate_default( sink, link, &source_fmt, &sink_fmt); } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); struct v4l2_subdev_pad_config * v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd) { struct v4l2_subdev_pad_config *cfg; int ret; if (!sd->entity.num_pads) return NULL; cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg), GFP_KERNEL | __GFP_ZERO); if (!cfg) return NULL; ret = v4l2_subdev_call(sd, pad, init_cfg, cfg); if (ret < 0 && ret != -ENOIOCTLCMD) { kvfree(cfg); return NULL; } return cfg; } EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config); void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg) { kvfree(cfg); } EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config); #endif /* CONFIG_MEDIA_CONTROLLER */ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) { INIT_LIST_HEAD(&sd->list); BUG_ON(!ops); sd->ops = ops; sd->v4l2_dev = NULL; sd->flags = 0; sd->name[0] = '\0'; sd->grp_id = 0; sd->dev_priv = NULL; sd->host_priv = NULL; #if defined(CONFIG_MEDIA_CONTROLLER) sd->entity.name = sd->name; sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV; sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; #endif } EXPORT_SYMBOL(v4l2_subdev_init); void v4l2_subdev_notify_event(struct v4l2_subdev *sd, const struct v4l2_event *ev) { v4l2_event_queue(sd->devnode, ev); v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev); } EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);