| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Laurent Pinchart | 3261 | 28.83% | 34 | 20.86% |
| Tomi Valkeinen | 2586 | 22.86% | 25 | 15.34% |
| Sakari Ailus | 2350 | 20.77% | 28 | 17.18% |
| Hans Verkuil | 1168 | 10.32% | 34 | 20.86% |
| Janusz Krzysztofik | 752 | 6.65% | 4 | 2.45% |
| Hans de Goede | 221 | 1.95% | 2 | 1.23% |
| Stanimir Varbanov | 195 | 1.72% | 1 | 0.61% |
| Jacopo Mondi | 185 | 1.64% | 4 | 2.45% |
| Paweł Anikiel | 165 | 1.46% | 2 | 1.23% |
| Steve Longerbeam | 93 | 0.82% | 3 | 1.84% |
| Niklas Söderlund | 87 | 0.77% | 2 | 1.23% |
| Martin Hostettler | 64 | 0.57% | 1 | 0.61% |
| Lars-Peter Clausen | 51 | 0.45% | 1 | 0.61% |
| Mauro Carvalho Chehab | 42 | 0.37% | 5 | 3.07% |
| Antti Koskipaa | 30 | 0.27% | 1 | 0.61% |
| Sylwester Nawrocki | 10 | 0.09% | 1 | 0.61% |
| Antoine Jacquet | 8 | 0.07% | 1 | 0.61% |
| Hugues Fruchet | 7 | 0.06% | 1 | 0.61% |
| Ezequiel García | 6 | 0.05% | 1 | 0.61% |
| Peilin Ye | 5 | 0.04% | 1 | 0.61% |
| Rui Miguel Silva | 4 | 0.04% | 1 | 0.61% |
| Tomasz Figa | 3 | 0.03% | 1 | 0.61% |
| Javier Martinez Canillas | 3 | 0.03% | 1 | 0.61% |
| Andrzej Pietrasiewicz | 3 | 0.03% | 1 | 0.61% |
| Guennadi Liakhovetski | 3 | 0.03% | 1 | 0.61% |
| Andy Shevchenko | 3 | 0.03% | 1 | 0.61% |
| Linus Torvalds | 2 | 0.02% | 1 | 0.61% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.61% |
| Paul Gortmaker | 2 | 0.02% | 1 | 0.61% |
| Pete Eberlein | 1 | 0.01% | 1 | 0.61% |
| Al Viro | 1 | 0.01% | 1 | 0.61% |
| Total | 11313 | 163 |
// SPDX-License-Identifier: GPL-2.0-only /* * V4L2 sub-device * * Copyright (C) 2010 Nokia Corporation * * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> * Sakari Ailus <sakari.ailus@iki.fi> */ #include <linux/export.h> #include <linux/ioctl.h> #include <linux/leds.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/overflow.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/types.h> #include <linux/version.h> #include <linux/videodev2.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fh.h> #include <media/v4l2-ioctl.h> #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) /* * The Streams API is an experimental feature. To use the Streams API, set * 'v4l2_subdev_enable_streams_api' to 1 below. */ static bool v4l2_subdev_enable_streams_api; #endif /* * Maximum stream ID is 63 for now, as we use u64 bitmask to represent a set * of streams. * * Note that V4L2_FRAME_DESC_ENTRY_MAX is related: V4L2_FRAME_DESC_ENTRY_MAX * restricts the total number of streams in a pad, although the stream ID is * not restricted. */ #define V4L2_SUBDEV_MAX_STREAM_ID 63 #include "v4l2-subdev-priv.h" #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) { struct v4l2_subdev_state *state; static struct lock_class_key key; state = __v4l2_subdev_state_alloc(sd, "fh->state->lock", &key); if (IS_ERR(state)) return PTR_ERR(state); fh->state = state; return 0; } static void subdev_fh_free(struct v4l2_subdev_fh *fh) { __v4l2_subdev_state_free(fh->state); fh->state = 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 (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; } 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_state(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, u32 which, u32 pad, u32 stream) { if (sd->flags & V4L2_SUBDEV_FL_STREAMS) { #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) if (!v4l2_subdev_state_get_format(state, pad, stream)) return -EINVAL; return 0; #else return -EINVAL; #endif } if (stream != 0) return -EINVAL; if (which == V4L2_SUBDEV_FORMAT_TRY && (!state || !state->pads)) return -EINVAL; return 0; } static inline int check_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { if (!format) return -EINVAL; return check_which(format->which) ? : check_pad(sd, format->pad) ? : check_state(sd, state, format->which, format->pad, format->stream); } static int call_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { return check_format(sd, state, format) ? : sd->ops->pad->get_fmt(sd, state, format); } static int call_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { return check_format(sd, state, format) ? : sd->ops->pad->set_fmt(sd, state, format); } static int call_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_mbus_code_enum *code) { if (!code) return -EINVAL; return check_which(code->which) ? : check_pad(sd, code->pad) ? : check_state(sd, state, code->which, code->pad, code->stream) ? : sd->ops->pad->enum_mbus_code(sd, state, code); } static int call_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_size_enum *fse) { if (!fse) return -EINVAL; return check_which(fse->which) ? : check_pad(sd, fse->pad) ? : check_state(sd, state, fse->which, fse->pad, fse->stream) ? : sd->ops->pad->enum_frame_size(sd, state, fse); } static int call_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_interval_enum *fie) { if (!fie) return -EINVAL; return check_which(fie->which) ? : check_pad(sd, fie->pad) ? : check_state(sd, state, fie->which, fie->pad, fie->stream) ? : sd->ops->pad->enum_frame_interval(sd, state, fie); } static inline int check_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_selection *sel) { if (!sel) return -EINVAL; return check_which(sel->which) ? : check_pad(sd, sel->pad) ? : check_state(sd, state, sel->which, sel->pad, sel->stream); } static int call_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_selection *sel) { return check_selection(sd, state, sel) ? : sd->ops->pad->get_selection(sd, state, sel); } static int call_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_selection *sel) { return check_selection(sd, state, sel) ? : sd->ops->pad->set_selection(sd, state, sel); } static inline int check_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_interval *fi) { if (!fi) return -EINVAL; return check_which(fi->which) ? : check_pad(sd, fi->pad) ? : check_state(sd, state, fi->which, fi->pad, fi->stream); } static int call_get_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_interval *fi) { return check_frame_interval(sd, state, fi) ? : sd->ops->pad->get_frame_interval(sd, state, fi); } static int call_set_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_interval *fi) { return check_frame_interval(sd, state, fi) ? : sd->ops->pad->set_frame_interval(sd, state, fi); } static int call_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_mbus_frame_desc *fd) { unsigned int i; int ret; memset(fd, 0, sizeof(*fd)); ret = sd->ops->pad->get_frame_desc(sd, pad, fd); if (ret) return ret; dev_dbg(sd->dev, "Frame descriptor on pad %u, type %s\n", pad, fd->type == V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL ? "parallel" : fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2 ? "CSI-2" : "unknown"); for (i = 0; i < fd->num_entries; i++) { struct v4l2_mbus_frame_desc_entry *entry = &fd->entry[i]; char buf[20] = ""; if (fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2) WARN_ON(snprintf(buf, sizeof(buf), ", vc %u, dt 0x%02x", entry->bus.csi2.vc, entry->bus.csi2.dt) >= sizeof(buf)); dev_dbg(sd->dev, "\tstream %u, code 0x%04x, length %u, flags 0x%04x%s\n", entry->stream, entry->pixelcode, entry->length, entry->flags, buf); } return 0; } 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_s_dv_timings(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_dv_timings *timings) { if (!timings) return -EINVAL; return check_pad(sd, pad) ? : sd->ops->pad->s_dv_timings(sd, pad, timings); } static int call_g_dv_timings(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_dv_timings *timings) { if (!timings) return -EINVAL; return check_pad(sd, pad) ? : sd->ops->pad->g_dv_timings(sd, pad, timings); } static int call_query_dv_timings(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_dv_timings *timings) { if (!timings) return -EINVAL; return check_pad(sd, pad) ? : sd->ops->pad->query_dv_timings(sd, pad, timings); } 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_s_stream(struct v4l2_subdev *sd, int enable) { int ret; /* * The .s_stream() operation must never be called to start or stop an * already started or stopped subdev. Catch offenders but don't return * an error yet to avoid regressions. * * As .s_stream() is mutually exclusive with the .enable_streams() and * .disable_streams() operation, we can use the enabled_streams field * to store the subdev streaming state. */ if (WARN_ON(!!sd->enabled_streams == !!enable)) return 0; ret = sd->ops->video->s_stream(sd, enable); if (!enable && ret < 0) { dev_warn(sd->dev, "disabling streaming failed (%d)\n", ret); ret = 0; } if (!ret) { sd->enabled_streams = enable ? BIT(0) : 0; #if IS_REACHABLE(CONFIG_LEDS_CLASS) if (!IS_ERR_OR_NULL(sd->privacy_led)) { if (enable) led_set_brightness(sd->privacy_led, sd->privacy_led->max_brightness); else led_set_brightness(sd->privacy_led, 0); } #endif } return ret; } #ifdef CONFIG_MEDIA_CONTROLLER /* * Create state-management wrapper for pad ops dealing with subdev state. The * wrapper handles the case where the caller does not provide the called * subdev's state. This should be removed when all the callers are fixed. */ #define DEFINE_STATE_WRAPPER(f, arg_type) \ static int call_##f##_state(struct v4l2_subdev *sd, \ struct v4l2_subdev_state *_state, \ arg_type *arg) \ { \ struct v4l2_subdev_state *state = _state; \ int ret; \ if (!_state) \ state = v4l2_subdev_lock_and_get_active_state(sd); \ ret = call_##f(sd, state, arg); \ if (!_state && state) \ v4l2_subdev_unlock_state(state); \ return ret; \ } #else /* CONFIG_MEDIA_CONTROLLER */ #define DEFINE_STATE_WRAPPER(f, arg_type) \ static int call_##f##_state(struct v4l2_subdev *sd, \ struct v4l2_subdev_state *state, \ arg_type *arg) \ { \ return call_##f(sd, state, arg); \ } #endif /* CONFIG_MEDIA_CONTROLLER */ DEFINE_STATE_WRAPPER(get_fmt, struct v4l2_subdev_format); DEFINE_STATE_WRAPPER(set_fmt, struct v4l2_subdev_format); DEFINE_STATE_WRAPPER(enum_mbus_code, struct v4l2_subdev_mbus_code_enum); DEFINE_STATE_WRAPPER(enum_frame_size, struct v4l2_subdev_frame_size_enum); DEFINE_STATE_WRAPPER(enum_frame_interval, struct v4l2_subdev_frame_interval_enum); DEFINE_STATE_WRAPPER(get_selection, struct v4l2_subdev_selection); DEFINE_STATE_WRAPPER(set_selection, struct v4l2_subdev_selection); static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = { .get_fmt = call_get_fmt_state, .set_fmt = call_set_fmt_state, .enum_mbus_code = call_enum_mbus_code_state, .enum_frame_size = call_enum_frame_size_state, .enum_frame_interval = call_enum_frame_interval_state, .get_selection = call_get_selection_state, .set_selection = call_set_selection_state, .get_frame_interval = call_get_frame_interval, .set_frame_interval = call_set_frame_interval, .get_edid = call_get_edid, .set_edid = call_set_edid, .s_dv_timings = call_s_dv_timings, .g_dv_timings = call_g_dv_timings, .query_dv_timings = call_query_dv_timings, .dv_timings_cap = call_dv_timings_cap, .enum_dv_timings = call_enum_dv_timings, .get_frame_desc = call_get_frame_desc, .get_mbus_config = call_get_mbus_config, }; static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = { .s_stream = call_s_stream, }; 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 struct v4l2_subdev_state * subdev_ioctl_get_state(struct v4l2_subdev *sd, struct v4l2_subdev_fh *subdev_fh, unsigned int cmd, void *arg) { u32 which; switch (cmd) { default: return NULL; case VIDIOC_SUBDEV_G_FMT: case VIDIOC_SUBDEV_S_FMT: which = ((struct v4l2_subdev_format *)arg)->which; break; case VIDIOC_SUBDEV_G_CROP: case VIDIOC_SUBDEV_S_CROP: which = ((struct v4l2_subdev_crop *)arg)->which; break; case VIDIOC_SUBDEV_ENUM_MBUS_CODE: which = ((struct v4l2_subdev_mbus_code_enum *)arg)->which; break; case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: which = ((struct v4l2_subdev_frame_size_enum *)arg)->which; break; case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: which = ((struct v4l2_subdev_frame_interval_enum *)arg)->which; break; case VIDIOC_SUBDEV_G_SELECTION: case VIDIOC_SUBDEV_S_SELECTION: which = ((struct v4l2_subdev_selection *)arg)->which; break; case VIDIOC_SUBDEV_G_FRAME_INTERVAL: case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; if (!(subdev_fh->client_caps & V4L2_SUBDEV_CLIENT_CAP_INTERVAL_USES_WHICH)) fi->which = V4L2_SUBDEV_FORMAT_ACTIVE; which = fi->which; break; } case VIDIOC_SUBDEV_G_ROUTING: case VIDIOC_SUBDEV_S_ROUTING: which = ((struct v4l2_subdev_routing *)arg)->which; break; } return which == V4L2_SUBDEV_FORMAT_TRY ? subdev_fh->state : v4l2_subdev_get_unlocked_active_state(sd); } static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg, struct v4l2_subdev_state *state) { 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); bool streams_subdev = sd->flags & V4L2_SUBDEV_FL_STREAMS; bool client_supports_streams = subdev_fh->client_caps & V4L2_SUBDEV_CLIENT_CAP_STREAMS; int rval; /* * If the streams API is not enabled, remove V4L2_SUBDEV_CAP_STREAMS. * Remove this when the API is no longer experimental. */ if (!v4l2_subdev_enable_streams_api) streams_subdev = false; 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) | (streams_subdev ? V4L2_SUBDEV_CAP_STREAMS : 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_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; if (!client_supports_streams) format->stream = 0; memset(format->reserved, 0, sizeof(format->reserved)); memset(format->format.reserved, 0, sizeof(format->format.reserved)); return v4l2_subdev_call(sd, pad, get_fmt, state, format); } case VIDIOC_SUBDEV_S_FMT: { struct v4l2_subdev_format *format = arg; if (format->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; if (!client_supports_streams) format->stream = 0; memset(format->reserved, 0, sizeof(format->reserved)); memset(format->format.reserved, 0, sizeof(format->format.reserved)); return v4l2_subdev_call(sd, pad, set_fmt, state, format); } case VIDIOC_SUBDEV_G_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; if (!client_supports_streams) crop->stream = 0; memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; sel.stream = crop->stream; sel.target = V4L2_SEL_TGT_CROP; rval = v4l2_subdev_call( sd, pad, get_selection, state, &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; if (!client_supports_streams) crop->stream = 0; memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; sel.stream = crop->stream; sel.target = V4L2_SEL_TGT_CROP; sel.r = crop->rect; rval = v4l2_subdev_call( sd, pad, set_selection, state, &sel); crop->rect = sel.r; return rval; } case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { struct v4l2_subdev_mbus_code_enum *code = arg; if (!client_supports_streams) code->stream = 0; memset(code->reserved, 0, sizeof(code->reserved)); return v4l2_subdev_call(sd, pad, enum_mbus_code, state, code); } case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { struct v4l2_subdev_frame_size_enum *fse = arg; if (!client_supports_streams) fse->stream = 0; memset(fse->reserved, 0, sizeof(fse->reserved)); return v4l2_subdev_call(sd, pad, enum_frame_size, state, fse); } case VIDIOC_SUBDEV_G_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; if (!client_supports_streams) fi->stream = 0; memset(fi->reserved, 0, sizeof(fi->reserved)); return v4l2_subdev_call(sd, pad, get_frame_interval, state, fi); } case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; if (!client_supports_streams) fi->stream = 0; if (fi->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; memset(fi->reserved, 0, sizeof(fi->reserved)); return v4l2_subdev_call(sd, pad, set_frame_interval, state, fi); } case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval_enum *fie = arg; if (!client_supports_streams) fie->stream = 0; memset(fie->reserved, 0, sizeof(fie->reserved)); return v4l2_subdev_call(sd, pad, enum_frame_interval, state, fie); } case VIDIOC_SUBDEV_G_SELECTION: { struct v4l2_subdev_selection *sel = arg; if (!client_supports_streams) sel->stream = 0; memset(sel->reserved, 0, sizeof(sel->reserved)); return v4l2_subdev_call( sd, pad, get_selection, state, sel); } case VIDIOC_SUBDEV_S_SELECTION: { struct v4l2_subdev_selection *sel = arg; if (sel->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; if (!client_supports_streams) sel->stream = 0; memset(sel->reserved, 0, sizeof(sel->reserved)); return v4l2_subdev_call( sd, pad, set_selection, state, 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, pad, query_dv_timings, 0, arg); case VIDIOC_SUBDEV_G_DV_TIMINGS: return v4l2_subdev_call(sd, pad, g_dv_timings, 0, arg); case VIDIOC_SUBDEV_S_DV_TIMINGS: if (ro_subdev) return -EPERM; return v4l2_subdev_call(sd, pad, s_dv_timings, 0, 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); case VIDIOC_SUBDEV_G_ROUTING: { struct v4l2_subdev_routing *routing = arg; struct v4l2_subdev_krouting *krouting; if (!v4l2_subdev_enable_streams_api) return -ENOIOCTLCMD; if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) return -ENOIOCTLCMD; memset(routing->reserved, 0, sizeof(routing->reserved)); krouting = &state->routing; memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, krouting->routes, min(krouting->num_routes, routing->len_routes) * sizeof(*krouting->routes)); routing->num_routes = krouting->num_routes; return 0; } case VIDIOC_SUBDEV_S_ROUTING: { struct v4l2_subdev_routing *routing = arg; struct v4l2_subdev_route *routes = (struct v4l2_subdev_route *)(uintptr_t)routing->routes; struct v4l2_subdev_krouting krouting = {}; unsigned int i; if (!v4l2_subdev_enable_streams_api) return -ENOIOCTLCMD; if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) return -ENOIOCTLCMD; if (routing->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) return -EPERM; if (routing->num_routes > routing->len_routes) return -EINVAL; memset(routing->reserved, 0, sizeof(routing->reserved)); for (i = 0; i < routing->num_routes; ++i) { const struct v4l2_subdev_route *route = &routes[i]; const struct media_pad *pads = sd->entity.pads; if (route->sink_stream > V4L2_SUBDEV_MAX_STREAM_ID || route->source_stream > V4L2_SUBDEV_MAX_STREAM_ID) return -EINVAL; if (route->sink_pad >= sd->entity.num_pads) return -EINVAL; if (!(pads[route->sink_pad].flags & MEDIA_PAD_FL_SINK)) return -EINVAL; if (route->source_pad >= sd->entity.num_pads) return -EINVAL; if (!(pads[route->source_pad].flags & MEDIA_PAD_FL_SOURCE)) return -EINVAL; } /* * If the driver doesn't support setting routing, just return * the routing table. */ if (!v4l2_subdev_has_op(sd, pad, set_routing)) { memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, state->routing.routes, min(state->routing.num_routes, routing->len_routes) * sizeof(*state->routing.routes)); routing->num_routes = state->routing.num_routes; return 0; } krouting.num_routes = routing->num_routes; krouting.len_routes = routing->len_routes; krouting.routes = routes; rval = v4l2_subdev_call(sd, pad, set_routing, state, routing->which, &krouting); if (rval < 0) return rval; memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, state->routing.routes, min(state->routing.num_routes, routing->len_routes) * sizeof(*state->routing.routes)); routing->num_routes = state->routing.num_routes; return 0; } case VIDIOC_SUBDEV_G_CLIENT_CAP: { struct v4l2_subdev_client_capability *client_cap = arg; client_cap->capabilities = subdev_fh->client_caps; return 0; } case VIDIOC_SUBDEV_S_CLIENT_CAP: { struct v4l2_subdev_client_capability *client_cap = arg; /* * Clear V4L2_SUBDEV_CLIENT_CAP_STREAMS if streams API is not * enabled. Remove this when streams API is no longer * experimental. */ if (!v4l2_subdev_enable_streams_api) client_cap->capabilities &= ~V4L2_SUBDEV_CLIENT_CAP_STREAMS; /* Filter out unsupported capabilities */ client_cap->capabilities &= (V4L2_SUBDEV_CLIENT_CAP_STREAMS | V4L2_SUBDEV_CLIENT_CAP_INTERVAL_USES_WHICH); subdev_fh->client_caps = client_cap->capabilities; return 0; } 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)) { 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); struct v4l2_subdev_state *state; state = subdev_ioctl_get_state(sd, subdev_fh, cmd, arg); if (state) v4l2_subdev_lock_state(state); ret = subdev_do_ioctl(file, cmd, arg, state); if (state) v4l2_subdev_unlock_state(state); } 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 (device_match_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) { bool pass = true; /* The width, height and code must match. */ if (source_fmt->format.width != sink_fmt->format.width) { dev_dbg(sd->entity.graph_obj.mdev->dev, "%s: width does not match (source %u, sink %u)\n", __func__, source_fmt->format.width, sink_fmt->format.width); pass = false; } if (source_fmt->format.height != sink_fmt->format.height) { dev_dbg(sd->entity.graph_obj.mdev->dev, "%s: height does not match (source %u, sink %u)\n", __func__, source_fmt->format.height, sink_fmt->format.height); pass = false; } if (source_fmt->format.code != sink_fmt->format.code) { dev_dbg(sd->entity.graph_obj.mdev->dev, "%s: media bus code does not match (source 0x%8.8x, sink 0x%8.8x)\n", __func__, source_fmt->format.code, sink_fmt->format.code); pass = false; } /* 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) { dev_dbg(sd->entity.graph_obj.mdev->dev, "%s: field does not match (source %u, sink %u)\n", __func__, source_fmt->format.field, sink_fmt->format.field); pass = false; } if (pass) return 0; dev_dbg(sd->entity.graph_obj.mdev->dev, "%s: link was \"%s\":%u -> \"%s\":%u\n", __func__, link->source->entity->name, link->source->index, link->sink->entity->name, link->sink->index); return -EPIPE; } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); static int v4l2_subdev_link_validate_get_format(struct media_pad *pad, u32 stream, struct v4l2_subdev_format *fmt, bool states_locked) { struct v4l2_subdev_state *state; struct v4l2_subdev *sd; int ret; if (!is_media_entity_v4l2_subdev(pad->entity)) { 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; } sd = media_entity_to_v4l2_subdev(pad->entity); fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; fmt->pad = pad->index; fmt->stream = stream; if (states_locked) state = v4l2_subdev_get_locked_active_state(sd); else state = v4l2_subdev_lock_and_get_active_state(sd); ret = v4l2_subdev_call(sd, pad, get_fmt, state, fmt); if (!states_locked && state) v4l2_subdev_unlock_state(state); return ret; } #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static void __v4l2_link_validate_get_streams(struct media_pad *pad, u64 *streams_mask, bool states_locked) { struct v4l2_subdev_route *route; struct v4l2_subdev_state *state; struct v4l2_subdev *subdev; subdev = media_entity_to_v4l2_subdev(pad->entity); *streams_mask = 0; if (states_locked) state = v4l2_subdev_get_locked_active_state(subdev); else state = v4l2_subdev_lock_and_get_active_state(subdev); if (WARN_ON(!state)) return; for_each_active_route(&state->routing, route) { u32 route_pad; u32 route_stream; if (pad->flags & MEDIA_PAD_FL_SOURCE) { route_pad = route->source_pad; route_stream = route->source_stream; } else { route_pad = route->sink_pad; route_stream = route->sink_stream; } if (route_pad != pad->index) continue; *streams_mask |= BIT_ULL(route_stream); } if (!states_locked) v4l2_subdev_unlock_state(state); } #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ static void v4l2_link_validate_get_streams(struct media_pad *pad, u64 *streams_mask, bool states_locked) { struct v4l2_subdev *subdev = media_entity_to_v4l2_subdev(pad->entity); if (!(subdev->flags & V4L2_SUBDEV_FL_STREAMS)) { /* Non-streams subdevs have an implicit stream 0 */ *streams_mask = BIT_ULL(0); return; } #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) __v4l2_link_validate_get_streams(pad, streams_mask, states_locked); #else /* This shouldn't happen */ *streams_mask = 0; #endif } static int v4l2_subdev_link_validate_locked(struct media_link *link, bool states_locked) { struct v4l2_subdev *sink_subdev = media_entity_to_v4l2_subdev(link->sink->entity); struct device *dev = sink_subdev->entity.graph_obj.mdev->dev; u64 source_streams_mask; u64 sink_streams_mask; u64 dangling_sink_streams; u32 stream; int ret; dev_dbg(dev, "validating link \"%s\":%u -> \"%s\":%u\n", link->source->entity->name, link->source->index, link->sink->entity->name, link->sink->index); v4l2_link_validate_get_streams(link->source, &source_streams_mask, states_locked); v4l2_link_validate_get_streams(link->sink, &sink_streams_mask, states_locked); /* * It is ok to have more source streams than sink streams as extra * source streams can just be ignored by the receiver, but having extra * sink streams is an error as streams must have a source. */ dangling_sink_streams = (source_streams_mask ^ sink_streams_mask) & sink_streams_mask; if (dangling_sink_streams) { dev_err(dev, "Dangling sink streams: mask %#llx\n", dangling_sink_streams); return -EINVAL; } /* Validate source and sink stream formats */ for (stream = 0; stream < sizeof(sink_streams_mask) * 8; ++stream) { struct v4l2_subdev_format sink_fmt, source_fmt; if (!(sink_streams_mask & BIT_ULL(stream))) continue; dev_dbg(dev, "validating stream \"%s\":%u:%u -> \"%s\":%u:%u\n", link->source->entity->name, link->source->index, stream, link->sink->entity->name, link->sink->index, stream); ret = v4l2_subdev_link_validate_get_format(link->source, stream, &source_fmt, states_locked); if (ret < 0) { dev_dbg(dev, "Failed to get format for \"%s\":%u:%u (but that's ok)\n", link->source->entity->name, link->source->index, stream); continue; } ret = v4l2_subdev_link_validate_get_format(link->sink, stream, &sink_fmt, states_locked); if (ret < 0) { dev_dbg(dev, "Failed to get format for \"%s\":%u:%u (but that's ok)\n", link->sink->entity->name, link->sink->index, stream); continue; } /* TODO: add stream number to link_validate() */ ret = v4l2_subdev_call(sink_subdev, pad, link_validate, link, &source_fmt, &sink_fmt); if (!ret) continue; if (ret != -ENOIOCTLCMD) return ret; ret = v4l2_subdev_link_validate_default(sink_subdev, link, &source_fmt, &sink_fmt); if (ret) return ret; } return 0; } int v4l2_subdev_link_validate(struct media_link *link) { struct v4l2_subdev *source_sd, *sink_sd; struct v4l2_subdev_state *source_state, *sink_state; bool states_locked; int ret; if (!is_media_entity_v4l2_subdev(link->sink->entity) || !is_media_entity_v4l2_subdev(link->source->entity)) { pr_warn_once("%s of link '%s':%u->'%s':%u is not a V4L2 sub-device, driver bug!\n", !is_media_entity_v4l2_subdev(link->sink->entity) ? "sink" : "source", link->source->entity->name, link->source->index, link->sink->entity->name, link->sink->index); return 0; } sink_sd = media_entity_to_v4l2_subdev(link->sink->entity); source_sd = media_entity_to_v4l2_subdev(link->source->entity); sink_state = v4l2_subdev_get_unlocked_active_state(sink_sd); source_state = v4l2_subdev_get_unlocked_active_state(source_sd); states_locked = sink_state && source_state; if (states_locked) v4l2_subdev_lock_states(sink_state, source_state); ret = v4l2_subdev_link_validate_locked(link, states_locked); if (states_locked) v4l2_subdev_unlock_states(sink_state, source_state); return ret; } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); bool v4l2_subdev_has_pad_interdep(struct media_entity *entity, unsigned int pad0, unsigned int pad1) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); struct v4l2_subdev_krouting *routing; struct v4l2_subdev_state *state; unsigned int i; state = v4l2_subdev_lock_and_get_active_state(sd); routing = &state->routing; for (i = 0; i < routing->num_routes; ++i) { struct v4l2_subdev_route *route = &routing->routes[i]; if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) continue; if ((route->sink_pad == pad0 && route->source_pad == pad1) || (route->source_pad == pad0 && route->sink_pad == pad1)) { v4l2_subdev_unlock_state(state); return true; } } v4l2_subdev_unlock_state(state); return false; } EXPORT_SYMBOL_GPL(v4l2_subdev_has_pad_interdep); struct v4l2_subdev_state * __v4l2_subdev_state_alloc(struct v4l2_subdev *sd, const char *lock_name, struct lock_class_key *lock_key) { struct v4l2_subdev_state *state; int ret; state = kzalloc(sizeof(*state), GFP_KERNEL); if (!state) return ERR_PTR(-ENOMEM); __mutex_init(&state->_lock, lock_name, lock_key); if (sd->state_lock) state->lock = sd->state_lock; else state->lock = &state->_lock; state->sd = sd; /* Drivers that support streams do not need the legacy pad config */ if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS) && sd->entity.num_pads) { state->pads = kvcalloc(sd->entity.num_pads, sizeof(*state->pads), GFP_KERNEL); if (!state->pads) { ret = -ENOMEM; goto err; } } if (sd->internal_ops && sd->internal_ops->init_state) { /* * There can be no race at this point, but we lock the state * anyway to satisfy lockdep checks. */ v4l2_subdev_lock_state(state); ret = sd->internal_ops->init_state(sd, state); v4l2_subdev_unlock_state(state); if (ret) goto err; } return state; err: if (state && state->pads) kvfree(state->pads); kfree(state); return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_alloc); void __v4l2_subdev_state_free(struct v4l2_subdev_state *state) { if (!state) return; mutex_destroy(&state->_lock); kfree(state->routing.routes); kvfree(state->stream_configs.configs); kvfree(state->pads); kfree(state); } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_free); int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name, struct lock_class_key *key) { struct v4l2_subdev_state *state; state = __v4l2_subdev_state_alloc(sd, name, key); if (IS_ERR(state)) return PTR_ERR(state); sd->active_state = state; return 0; } EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize); void v4l2_subdev_cleanup(struct v4l2_subdev *sd) { struct v4l2_async_subdev_endpoint *ase, *ase_tmp; __v4l2_subdev_state_free(sd->active_state); sd->active_state = NULL; /* Uninitialised sub-device, bail out here. */ if (!sd->async_subdev_endpoint_list.next) return; list_for_each_entry_safe(ase, ase_tmp, &sd->async_subdev_endpoint_list, async_subdev_endpoint_entry) { list_del(&ase->async_subdev_endpoint_entry); kfree(ase); } } EXPORT_SYMBOL_GPL(v4l2_subdev_cleanup); struct v4l2_mbus_framefmt * __v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, unsigned int pad, u32 stream) { struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; if (WARN_ON_ONCE(!state)) return NULL; if (state->pads) { if (stream) return NULL; if (pad >= state->sd->entity.num_pads) return NULL; return &state->pads[pad].format; } lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; for (i = 0; i < stream_configs->num_configs; ++i) { if (stream_configs->configs[i].pad == pad && stream_configs->configs[i].stream == stream) return &stream_configs->configs[i].fmt; } return NULL; } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_format); struct v4l2_rect * __v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad, u32 stream) { struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; if (WARN_ON_ONCE(!state)) return NULL; if (state->pads) { if (stream) return NULL; if (pad >= state->sd->entity.num_pads) return NULL; return &state->pads[pad].crop; } lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; for (i = 0; i < stream_configs->num_configs; ++i) { if (stream_configs->configs[i].pad == pad && stream_configs->configs[i].stream == stream) return &stream_configs->configs[i].crop; } return NULL; } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_crop); struct v4l2_rect * __v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state, unsigned int pad, u32 stream) { struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; if (WARN_ON_ONCE(!state)) return NULL; if (state->pads) { if (stream) return NULL; if (pad >= state->sd->entity.num_pads) return NULL; return &state->pads[pad].compose; } lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; for (i = 0; i < stream_configs->num_configs; ++i) { if (stream_configs->configs[i].pad == pad && stream_configs->configs[i].stream == stream) return &stream_configs->configs[i].compose; } return NULL; } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_compose); struct v4l2_fract * __v4l2_subdev_state_get_interval(struct v4l2_subdev_state *state, unsigned int pad, u32 stream) { struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; if (WARN_ON(!state)) return NULL; lockdep_assert_held(state->lock); if (state->pads) { if (stream) return NULL; if (pad >= state->sd->entity.num_pads) return NULL; return &state->pads[pad].interval; } lockdep_assert_held(state->lock); stream_configs = &state->stream_configs; for (i = 0; i < stream_configs->num_configs; ++i) { if (stream_configs->configs[i].pad == pad && stream_configs->configs[i].stream == stream) return &stream_configs->configs[i].interval; } return NULL; } EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_interval); #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static int v4l2_subdev_init_stream_configs(struct v4l2_subdev_stream_configs *stream_configs, const struct v4l2_subdev_krouting *routing) { struct v4l2_subdev_stream_configs new_configs = { 0 }; struct v4l2_subdev_route *route; u32 idx; /* Count number of formats needed */ for_each_active_route(routing, route) { /* * Each route needs a format on both ends of the route. */ new_configs.num_configs += 2; } if (new_configs.num_configs) { new_configs.configs = kvcalloc(new_configs.num_configs, sizeof(*new_configs.configs), GFP_KERNEL); if (!new_configs.configs) return -ENOMEM; } /* * Fill in the 'pad' and stream' value for each item in the array from * the routing table */ idx = 0; for_each_active_route(routing, route) { new_configs.configs[idx].pad = route->sink_pad; new_configs.configs[idx].stream = route->sink_stream; idx++; new_configs.configs[idx].pad = route->source_pad; new_configs.configs[idx].stream = route->source_stream; idx++; } kvfree(stream_configs->configs); *stream_configs = new_configs; return 0; } int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt; fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream); if (!fmt) return -EINVAL; format->format = *fmt; return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_get_fmt); int v4l2_subdev_get_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_frame_interval *fi) { struct v4l2_fract *interval; interval = v4l2_subdev_state_get_interval(state, fi->pad, fi->stream); if (!interval) return -EINVAL; fi->interval = *interval; return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_get_frame_interval); int v4l2_subdev_set_routing(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, const struct v4l2_subdev_krouting *routing) { struct v4l2_subdev_krouting *dst = &state->routing; const struct v4l2_subdev_krouting *src = routing; struct v4l2_subdev_krouting new_routing = { 0 }; size_t bytes; int r; if (unlikely(check_mul_overflow((size_t)src->num_routes, sizeof(*src->routes), &bytes))) return -EOVERFLOW; lockdep_assert_held(state->lock); if (src->num_routes > 0) { new_routing.routes = kmemdup(src->routes, bytes, GFP_KERNEL); if (!new_routing.routes) return -ENOMEM; } new_routing.num_routes = src->num_routes; r = v4l2_subdev_init_stream_configs(&state->stream_configs, &new_routing); if (r) { kfree(new_routing.routes); return r; } kfree(dst->routes); *dst = new_routing; return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing); struct v4l2_subdev_route * __v4l2_subdev_next_active_route(const struct v4l2_subdev_krouting *routing, struct v4l2_subdev_route *route) { if (route) ++route; else route = &routing->routes[0]; for (; route < routing->routes + routing->num_routes; ++route) { if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) continue; return route; } return NULL; } EXPORT_SYMBOL_GPL(__v4l2_subdev_next_active_route); int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, const struct v4l2_subdev_krouting *routing, const struct v4l2_mbus_framefmt *fmt) { struct v4l2_subdev_stream_configs *stream_configs; unsigned int i; int ret; ret = v4l2_subdev_set_routing(sd, state, routing); if (ret) return ret; stream_configs = &state->stream_configs; for (i = 0; i < stream_configs->num_configs; ++i) stream_configs->configs[i].fmt = *fmt; return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing_with_fmt); int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, u32 pad, u32 stream, u32 *other_pad, u32 *other_stream) { unsigned int i; for (i = 0; i < routing->num_routes; ++i) { struct v4l2_subdev_route *route = &routing->routes[i]; if (route->source_pad == pad && route->source_stream == stream) { if (other_pad) *other_pad = route->sink_pad; if (other_stream) *other_stream = route->sink_stream; return 0; } if (route->sink_pad == pad && route->sink_stream == stream) { if (other_pad) *other_pad = route->source_pad; if (other_stream) *other_stream = route->source_stream; return 0; } } return -EINVAL; } EXPORT_SYMBOL_GPL(v4l2_subdev_routing_find_opposite_end); struct v4l2_mbus_framefmt * v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, u32 stream) { u32 other_pad, other_stream; int ret; ret = v4l2_subdev_routing_find_opposite_end(&state->routing, pad, stream, &other_pad, &other_stream); if (ret) return NULL; return v4l2_subdev_state_get_format(state, other_pad, other_stream); } EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format); u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state, u32 pad0, u32 pad1, u64 *streams) { const struct v4l2_subdev_krouting *routing = &state->routing; struct v4l2_subdev_route *route; u64 streams0 = 0; u64 streams1 = 0; for_each_active_route(routing, route) { if (route->sink_pad == pad0 && route->source_pad == pad1 && (*streams & BIT_ULL(route->sink_stream))) { streams0 |= BIT_ULL(route->sink_stream); streams1 |= BIT_ULL(route->source_stream); } if (route->source_pad == pad0 && route->sink_pad == pad1 && (*streams & BIT_ULL(route->source_stream))) { streams0 |= BIT_ULL(route->source_stream); streams1 |= BIT_ULL(route->sink_stream); } } *streams = streams0; return streams1; } EXPORT_SYMBOL_GPL(v4l2_subdev_state_xlate_streams); int v4l2_subdev_routing_validate(struct v4l2_subdev *sd, const struct v4l2_subdev_krouting *routing, enum v4l2_subdev_routing_restriction disallow) { u32 *remote_pads = NULL; unsigned int i, j; int ret = -EINVAL; if (disallow & (V4L2_SUBDEV_ROUTING_NO_STREAM_MIX | V4L2_SUBDEV_ROUTING_NO_MULTIPLEXING)) { remote_pads = kcalloc(sd->entity.num_pads, sizeof(*remote_pads), GFP_KERNEL); if (!remote_pads) return -ENOMEM; for (i = 0; i < sd->entity.num_pads; ++i) remote_pads[i] = U32_MAX; } for (i = 0; i < routing->num_routes; ++i) { const struct v4l2_subdev_route *route = &routing->routes[i]; /* Validate the sink and source pad numbers. */ if (route->sink_pad >= sd->entity.num_pads || !(sd->entity.pads[route->sink_pad].flags & MEDIA_PAD_FL_SINK)) { dev_dbg(sd->dev, "route %u sink (%u) is not a sink pad\n", i, route->sink_pad); goto out; } if (route->source_pad >= sd->entity.num_pads || !(sd->entity.pads[route->source_pad].flags & MEDIA_PAD_FL_SOURCE)) { dev_dbg(sd->dev, "route %u source (%u) is not a source pad\n", i, route->source_pad); goto out; } /* * V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX: all streams from a * sink pad must be routed to a single source pad. */ if (disallow & V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX) { if (remote_pads[route->sink_pad] != U32_MAX && remote_pads[route->sink_pad] != route->source_pad) { dev_dbg(sd->dev, "route %u attempts to mix %s streams\n", i, "sink"); goto out; } } /* * V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX: all streams on a * source pad must originate from a single sink pad. */ if (disallow & V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX) { if (remote_pads[route->source_pad] != U32_MAX && remote_pads[route->source_pad] != route->sink_pad) { dev_dbg(sd->dev, "route %u attempts to mix %s streams\n", i, "source"); goto out; } } /* * V4L2_SUBDEV_ROUTING_NO_SINK_MULTIPLEXING: Pads on the sink * side can not do stream multiplexing, i.e. there can be only * a single stream in a sink pad. */ if (disallow & V4L2_SUBDEV_ROUTING_NO_SINK_MULTIPLEXING) { if (remote_pads[route->sink_pad] != U32_MAX) { dev_dbg(sd->dev, "route %u attempts to multiplex on %s pad %u\n", i, "sink", route->sink_pad); goto out; } } /* * V4L2_SUBDEV_ROUTING_NO_SOURCE_MULTIPLEXING: Pads on the * source side can not do stream multiplexing, i.e. there can * be only a single stream in a source pad. */ if (disallow & V4L2_SUBDEV_ROUTING_NO_SOURCE_MULTIPLEXING) { if (remote_pads[route->source_pad] != U32_MAX) { dev_dbg(sd->dev, "route %u attempts to multiplex on %s pad %u\n", i, "source", route->source_pad); goto out; } } if (remote_pads) { remote_pads[route->sink_pad] = route->source_pad; remote_pads[route->source_pad] = route->sink_pad; } for (j = i + 1; j < routing->num_routes; ++j) { const struct v4l2_subdev_route *r = &routing->routes[j]; /* * V4L2_SUBDEV_ROUTING_NO_1_TO_N: No two routes can * originate from the same (sink) stream. */ if ((disallow & V4L2_SUBDEV_ROUTING_NO_1_TO_N) && route->sink_pad == r->sink_pad && route->sink_stream == r->sink_stream) { dev_dbg(sd->dev, "routes %u and %u originate from same sink (%u/%u)\n", i, j, route->sink_pad, route->sink_stream); goto out; } /* * V4L2_SUBDEV_ROUTING_NO_N_TO_1: No two routes can end * at the same (source) stream. */ if ((disallow & V4L2_SUBDEV_ROUTING_NO_N_TO_1) && route->source_pad == r->source_pad && route->source_stream == r->source_stream) { dev_dbg(sd->dev, "routes %u and %u end at same source (%u/%u)\n", i, j, route->source_pad, route->source_stream); goto out; } } } ret = 0; out: kfree(remote_pads); return ret; } EXPORT_SYMBOL_GPL(v4l2_subdev_routing_validate); static int v4l2_subdev_enable_streams_fallback(struct v4l2_subdev *sd, u32 pad, u64 streams_mask) { struct device *dev = sd->entity.graph_obj.mdev->dev; unsigned int i; int ret; /* * The subdev doesn't implement pad-based stream enable, fall back * on the .s_stream() operation. This can only be done for subdevs that * have a single source pad, as sd->enabled_streams is global to the * subdev. */ if (!(sd->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)) return -EOPNOTSUPP; for (i = 0; i < sd->entity.num_pads; ++i) { if (i != pad && sd->entity.pads[i].flags & MEDIA_PAD_FL_SOURCE) return -EOPNOTSUPP; } if (sd->enabled_streams & streams_mask) { dev_dbg(dev, "set of streams %#llx already enabled on %s:%u\n", streams_mask, sd->entity.name, pad); return -EALREADY; } /* Start streaming when the first streams are enabled. */ if (!sd->enabled_streams) { ret = v4l2_subdev_call(sd, video, s_stream, 1); if (ret) return ret; } sd->enabled_streams |= streams_mask; return 0; } int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad, u64 streams_mask) { struct device *dev = sd->entity.graph_obj.mdev->dev; struct v4l2_subdev_state *state; u64 found_streams = 0; unsigned int i; int ret; /* A few basic sanity checks first. */ if (pad >= sd->entity.num_pads) return -EINVAL; if (!streams_mask) return 0; /* Fallback on .s_stream() if .enable_streams() isn't available. */ if (!sd->ops->pad || !sd->ops->pad->enable_streams) return v4l2_subdev_enable_streams_fallback(sd, pad, streams_mask); state = v4l2_subdev_lock_and_get_active_state(sd); /* * Verify that the requested streams exist and that they are not * already enabled. */ for (i = 0; i < state->stream_configs.num_configs; ++i) { struct v4l2_subdev_stream_config *cfg = &state->stream_configs.configs[i]; if (cfg->pad != pad || !(streams_mask & BIT_ULL(cfg->stream))) continue; found_streams |= BIT_ULL(cfg->stream); if (cfg->enabled) { dev_dbg(dev, "stream %u already enabled on %s:%u\n", cfg->stream, sd->entity.name, pad); ret = -EALREADY; goto done; } } if (found_streams != streams_mask) { dev_dbg(dev, "streams 0x%llx not found on %s:%u\n", streams_mask & ~found_streams, sd->entity.name, pad); ret = -EINVAL; goto done; } dev_dbg(dev, "enable streams %u:%#llx\n", pad, streams_mask); /* Call the .enable_streams() operation. */ ret = v4l2_subdev_call(sd, pad, enable_streams, state, pad, streams_mask); if (ret) { dev_dbg(dev, "enable streams %u:%#llx failed: %d\n", pad, streams_mask, ret); goto done; } /* Mark the streams as enabled. */ for (i = 0; i < state->stream_configs.num_configs; ++i) { struct v4l2_subdev_stream_config *cfg = &state->stream_configs.configs[i]; if (cfg->pad == pad && (streams_mask & BIT_ULL(cfg->stream))) cfg->enabled = true; } done: v4l2_subdev_unlock_state(state); return ret; } EXPORT_SYMBOL_GPL(v4l2_subdev_enable_streams); static int v4l2_subdev_disable_streams_fallback(struct v4l2_subdev *sd, u32 pad, u64 streams_mask) { struct device *dev = sd->entity.graph_obj.mdev->dev; unsigned int i; int ret; /* * If the subdev doesn't implement pad-based stream enable, fall back * on the .s_stream() operation. This can only be done for subdevs that * have a single source pad, as sd->enabled_streams is global to the * subdev. */ if (!(sd->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)) return -EOPNOTSUPP; for (i = 0; i < sd->entity.num_pads; ++i) { if (i != pad && sd->entity.pads[i].flags & MEDIA_PAD_FL_SOURCE) return -EOPNOTSUPP; } if ((sd->enabled_streams & streams_mask) != streams_mask) { dev_dbg(dev, "set of streams %#llx already disabled on %s:%u\n", streams_mask, sd->entity.name, pad); return -EALREADY; } /* Stop streaming when the last streams are disabled. */ if (!(sd->enabled_streams & ~streams_mask)) { ret = v4l2_subdev_call(sd, video, s_stream, 0); if (ret) return ret; } sd->enabled_streams &= ~streams_mask; return 0; } int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad, u64 streams_mask) { struct device *dev = sd->entity.graph_obj.mdev->dev; struct v4l2_subdev_state *state; u64 found_streams = 0; unsigned int i; int ret; /* A few basic sanity checks first. */ if (pad >= sd->entity.num_pads) return -EINVAL; if (!streams_mask) return 0; /* Fallback on .s_stream() if .disable_streams() isn't available. */ if (!sd->ops->pad || !sd->ops->pad->disable_streams) return v4l2_subdev_disable_streams_fallback(sd, pad, streams_mask); state = v4l2_subdev_lock_and_get_active_state(sd); /* * Verify that the requested streams exist and that they are not * already disabled. */ for (i = 0; i < state->stream_configs.num_configs; ++i) { struct v4l2_subdev_stream_config *cfg = &state->stream_configs.configs[i]; if (cfg->pad != pad || !(streams_mask & BIT_ULL(cfg->stream))) continue; found_streams |= BIT_ULL(cfg->stream); if (!cfg->enabled) { dev_dbg(dev, "stream %u already disabled on %s:%u\n", cfg->stream, sd->entity.name, pad); ret = -EALREADY; goto done; } } if (found_streams != streams_mask) { dev_dbg(dev, "streams 0x%llx not found on %s:%u\n", streams_mask & ~found_streams, sd->entity.name, pad); ret = -EINVAL; goto done; } dev_dbg(dev, "disable streams %u:%#llx\n", pad, streams_mask); /* Call the .disable_streams() operation. */ ret = v4l2_subdev_call(sd, pad, disable_streams, state, pad, streams_mask); if (ret) { dev_dbg(dev, "disable streams %u:%#llx failed: %d\n", pad, streams_mask, ret); goto done; } /* Mark the streams as disabled. */ for (i = 0; i < state->stream_configs.num_configs; ++i) { struct v4l2_subdev_stream_config *cfg = &state->stream_configs.configs[i]; if (cfg->pad == pad && (streams_mask & BIT_ULL(cfg->stream))) cfg->enabled = false; } done: v4l2_subdev_unlock_state(state); return ret; } EXPORT_SYMBOL_GPL(v4l2_subdev_disable_streams); int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable) { struct v4l2_subdev_state *state; struct v4l2_subdev_route *route; struct media_pad *pad; u64 source_mask = 0; int pad_index = -1; /* * Find the source pad. This helper is meant for subdevs that have a * single source pad, so failures shouldn't happen, but catch them * loudly nonetheless as they indicate a driver bug. */ media_entity_for_each_pad(&sd->entity, pad) { if (pad->flags & MEDIA_PAD_FL_SOURCE) { pad_index = pad->index; break; } } if (WARN_ON(pad_index == -1)) return -EINVAL; /* * As there's a single source pad, just collect all the source streams. */ state = v4l2_subdev_lock_and_get_active_state(sd); for_each_active_route(&state->routing, route) source_mask |= BIT_ULL(route->source_stream); v4l2_subdev_unlock_state(state); if (enable) return v4l2_subdev_enable_streams(sd, pad_index, source_mask); else return v4l2_subdev_disable_streams(sd, pad_index, source_mask); } EXPORT_SYMBOL_GPL(v4l2_subdev_s_stream_helper); #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ #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; sd->privacy_led = NULL; INIT_LIST_HEAD(&sd->async_subdev_endpoint_list); #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); int v4l2_subdev_get_privacy_led(struct v4l2_subdev *sd) { #if IS_REACHABLE(CONFIG_LEDS_CLASS) sd->privacy_led = led_get(sd->dev, "privacy-led"); if (IS_ERR(sd->privacy_led) && PTR_ERR(sd->privacy_led) != -ENOENT) return dev_err_probe(sd->dev, PTR_ERR(sd->privacy_led), "getting privacy LED\n"); if (!IS_ERR_OR_NULL(sd->privacy_led)) { mutex_lock(&sd->privacy_led->led_access); led_sysfs_disable(sd->privacy_led); led_trigger_remove(sd->privacy_led); led_set_brightness(sd->privacy_led, 0); mutex_unlock(&sd->privacy_led->led_access); } #endif return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_get_privacy_led); void v4l2_subdev_put_privacy_led(struct v4l2_subdev *sd) { #if IS_REACHABLE(CONFIG_LEDS_CLASS) if (!IS_ERR_OR_NULL(sd->privacy_led)) { mutex_lock(&sd->privacy_led->led_access); led_sysfs_enable(sd->privacy_led); mutex_unlock(&sd->privacy_led->led_access); led_put(sd->privacy_led); } #endif } EXPORT_SYMBOL_GPL(v4l2_subdev_put_privacy_led);
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