| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Laurent Pinchart | 2024 | 73.23% | 66 | 50.00% |
| Ricardo Ribalda Delgado | 189 | 6.84% | 22 | 16.67% |
| Guennadi Liakhovetski | 143 | 5.17% | 4 | 3.03% |
| Alexey Fisher | 133 | 4.81% | 2 | 1.52% |
| Kieran Bingham | 98 | 3.55% | 7 | 5.30% |
| Hans de Goede | 50 | 1.81% | 2 | 1.52% |
| Hans Verkuil | 32 | 1.16% | 4 | 3.03% |
| Joe Perches | 17 | 0.62% | 1 | 0.76% |
| Philipp Zabel | 11 | 0.40% | 2 | 1.52% |
| Martin Rubli | 10 | 0.36% | 2 | 1.52% |
| Adam Goode | 10 | 0.36% | 1 | 0.76% |
| Bob Liu | 8 | 0.29% | 1 | 0.76% |
| Arnd Bergmann | 5 | 0.18% | 2 | 1.52% |
| William Manley | 5 | 0.18% | 1 | 0.76% |
| Sergey Zakharchenko | 4 | 0.14% | 1 | 0.76% |
| Junghak Sung | 4 | 0.14% | 2 | 1.52% |
| Haogang Chen | 4 | 0.14% | 1 | 0.76% |
| Lei Ming | 4 | 0.14% | 2 | 1.52% |
| Andrew Morton | 3 | 0.11% | 1 | 0.76% |
| Kim Jae Joong | 2 | 0.07% | 1 | 0.76% |
| Daniel Axtens | 2 | 0.07% | 1 | 0.76% |
| Mauro Carvalho Chehab | 1 | 0.04% | 1 | 0.76% |
| Greg Kroah-Hartman | 1 | 0.04% | 1 | 0.76% |
| Christophe Jaillet | 1 | 0.04% | 1 | 0.76% |
| Al Viro | 1 | 0.04% | 1 | 0.76% |
| James Hilliard | 1 | 0.04% | 1 | 0.76% |
| Ezequiel García | 1 | 0.04% | 1 | 0.76% |
| Total | 2764 | 132 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _USB_VIDEO_H_ #define _USB_VIDEO_H_ #ifndef __KERNEL__ #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead." #endif /* __KERNEL__ */ #include <linux/atomic.h> #include <linux/kernel.h> #include <linux/poll.h> #include <linux/usb.h> #include <linux/usb/video.h> #include <linux/uvcvideo.h> #include <linux/videodev2.h> #include <linux/workqueue.h> #include <media/media-device.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fh.h> #include <media/videobuf2-v4l2.h> /* -------------------------------------------------------------------------- * UVC constants */ #define UVC_TERM_INPUT 0x0000 #define UVC_TERM_OUTPUT 0x8000 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000) #define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff) #define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0) #define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0) #define UVC_ENTITY_IS_ITERM(entity) \ (UVC_ENTITY_IS_TERM(entity) && \ ((entity)->type & 0x8000) == UVC_TERM_INPUT) #define UVC_ENTITY_IS_OTERM(entity) \ (UVC_ENTITY_IS_TERM(entity) && \ ((entity)->type & 0x8000) == UVC_TERM_OUTPUT) #define UVC_EXT_GPIO_UNIT 0x7ffe #define UVC_EXT_GPIO_UNIT_ID 0x100 /* ------------------------------------------------------------------------ * Driver specific constants. */ #define DRIVER_VERSION "1.1.1" /* Number of isochronous URBs. */ #define UVC_URBS 5 /* Maximum number of packets per URB. */ #define UVC_MAX_PACKETS 32 #define UVC_CTRL_CONTROL_TIMEOUT 5000 #define UVC_CTRL_STREAMING_TIMEOUT 5000 /* Maximum allowed number of control mappings per device */ #define UVC_MAX_CONTROL_MAPPINGS 1024 #define UVC_MAX_CONTROL_MENU_ENTRIES 32 /* Devices quirks */ #define UVC_QUIRK_STATUS_INTERVAL 0x00000001 #define UVC_QUIRK_PROBE_MINMAX 0x00000002 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008 #define UVC_QUIRK_STREAM_NO_FID 0x00000010 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080 #define UVC_QUIRK_PROBE_DEF 0x00000100 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 #define UVC_QUIRK_FORCE_Y8 0x00000800 #define UVC_QUIRK_FORCE_BPP 0x00001000 #define UVC_QUIRK_WAKE_AUTOSUSPEND 0x00002000 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 #define UVC_FMT_FLAG_STREAM 0x00000002 /* ------------------------------------------------------------------------ * Structures. */ struct gpio_desc; struct sg_table; struct uvc_device; /* * TODO: Put the most frequently accessed fields at the beginning of * structures to maximize cache efficiency. */ struct uvc_control_info { struct list_head mappings; u8 entity[16]; u8 index; /* Bit index in bmControls */ u8 selector; u16 size; u32 flags; }; struct uvc_control_mapping { struct list_head list; struct list_head ev_subs; u32 id; char *name; u8 entity[16]; u8 selector; u8 size; u8 offset; enum v4l2_ctrl_type v4l2_type; u32 data_type; const u32 *menu_mapping; const char (*menu_names)[UVC_MENU_NAME_LEN]; unsigned long menu_mask; u32 master_id; s32 master_manual; u32 slave_ids[2]; s32 (*get)(struct uvc_control_mapping *mapping, u8 query, const u8 *data); void (*set)(struct uvc_control_mapping *mapping, s32 value, u8 *data); }; struct uvc_control { struct uvc_entity *entity; struct uvc_control_info info; u8 index; /* Used to match the uvc_control entry with a uvc_control_info. */ u8 dirty:1, loaded:1, modified:1, cached:1, initialized:1; u8 *uvc_data; struct uvc_fh *handle; /* File handle that last changed the control. */ }; /* * The term 'entity' refers to both UVC units and UVC terminals. * * The type field is either the terminal type (wTerminalType in the terminal * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). * As the bDescriptorSubtype field is one byte long, the type value will * always have a null MSB for units. All terminal types defined by the UVC * specification have a non-null MSB, so it is safe to use the MSB to * differentiate between units and terminals as long as the descriptor parsing * code makes sure terminal types have a non-null MSB. * * For terminals, the type's most significant bit stores the terminal * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should * always be accessed with the UVC_ENTITY_* macros and never directly. */ #define UVC_ENTITY_FLAG_DEFAULT (1 << 0) struct uvc_entity { struct list_head list; /* Entity as part of a UVC device. */ struct list_head chain; /* Entity as part of a video device chain. */ unsigned int flags; /* * Entities exposed by the UVC device use IDs 0-255, extra entities * implemented by the driver (such as the GPIO entity) use IDs 256 and * up. */ u16 id; u16 type; char name[64]; u8 guid[16]; /* Media controller-related fields. */ struct video_device *vdev; struct v4l2_subdev subdev; unsigned int num_pads; unsigned int num_links; struct media_pad *pads; union { struct { u16 wObjectiveFocalLengthMin; u16 wObjectiveFocalLengthMax; u16 wOcularFocalLength; u8 bControlSize; u8 *bmControls; } camera; struct { u8 bControlSize; u8 *bmControls; u8 bTransportModeSize; u8 *bmTransportModes; } media; struct { } output; struct { u16 wMaxMultiplier; u8 bControlSize; u8 *bmControls; u8 bmVideoStandards; } processing; struct { } selector; struct { u8 bNumControls; u8 bControlSize; u8 *bmControls; u8 *bmControlsType; } extension; struct { u8 bControlSize; u8 *bmControls; struct gpio_desc *gpio_privacy; int irq; } gpio; }; u8 bNrInPins; u8 *baSourceID; int (*get_info)(struct uvc_device *dev, struct uvc_entity *entity, u8 cs, u8 *caps); int (*get_cur)(struct uvc_device *dev, struct uvc_entity *entity, u8 cs, void *data, u16 size); unsigned int ncontrols; struct uvc_control *controls; }; struct uvc_frame { u8 bFrameIndex; u8 bmCapabilities; u16 wWidth; u16 wHeight; u32 dwMinBitRate; u32 dwMaxBitRate; u32 dwMaxVideoFrameBufferSize; u8 bFrameIntervalType; u32 dwDefaultFrameInterval; const u32 *dwFrameInterval; }; struct uvc_format { u8 type; u8 index; u8 bpp; enum v4l2_colorspace colorspace; enum v4l2_xfer_func xfer_func; enum v4l2_ycbcr_encoding ycbcr_enc; u32 fcc; u32 flags; unsigned int nframes; const struct uvc_frame *frames; }; struct uvc_streaming_header { u8 bNumFormats; u8 bEndpointAddress; u8 bTerminalLink; u8 bControlSize; u8 *bmaControls; /* The following fields are used by input headers only. */ u8 bmInfo; u8 bStillCaptureMethod; u8 bTriggerSupport; u8 bTriggerUsage; }; enum uvc_buffer_state { UVC_BUF_STATE_IDLE = 0, UVC_BUF_STATE_QUEUED = 1, UVC_BUF_STATE_ACTIVE = 2, UVC_BUF_STATE_READY = 3, UVC_BUF_STATE_DONE = 4, UVC_BUF_STATE_ERROR = 5, }; struct uvc_buffer { struct vb2_v4l2_buffer buf; struct list_head queue; enum uvc_buffer_state state; unsigned int error; void *mem; unsigned int length; unsigned int bytesused; u32 pts; /* Asynchronous buffer handling. */ struct kref ref; }; #define UVC_QUEUE_DISCONNECTED (1 << 0) #define UVC_QUEUE_DROP_CORRUPTED (1 << 1) struct uvc_video_queue { struct vb2_queue queue; struct mutex mutex; /* Protects queue */ unsigned int flags; unsigned int buf_used; spinlock_t irqlock; /* Protects irqqueue */ struct list_head irqqueue; }; struct uvc_video_chain { struct uvc_device *dev; struct list_head list; struct list_head entities; /* All entities */ struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ struct mutex ctrl_mutex; /* Protects ctrl.info */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ u8 ctrl_class_bitmap; /* Bitmap of valid classes */ }; struct uvc_stats_frame { unsigned int size; /* Number of bytes captured */ unsigned int first_data; /* Index of the first non-empty packet */ unsigned int nb_packets; /* Number of packets */ unsigned int nb_empty; /* Number of empty packets */ unsigned int nb_invalid; /* Number of packets with an invalid header */ unsigned int nb_errors; /* Number of packets with the error bit set */ unsigned int nb_pts; /* Number of packets with a PTS timestamp */ unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */ unsigned int last_pts_diff; /* Index of the last PTS difference */ bool has_initial_pts; /* Whether the first non-empty packet has a PTS */ bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */ u32 pts; /* PTS of the last packet */ unsigned int nb_scr; /* Number of packets with a SCR timestamp */ unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */ u16 scr_sof; /* SCR.SOF of the last packet */ u32 scr_stc; /* SCR.STC of the last packet */ }; struct uvc_stats_stream { ktime_t start_ts; /* Stream start timestamp */ ktime_t stop_ts; /* Stream stop timestamp */ unsigned int nb_frames; /* Number of frames */ unsigned int nb_packets; /* Number of packets */ unsigned int nb_empty; /* Number of empty packets */ unsigned int nb_invalid; /* Number of packets with an invalid header */ unsigned int nb_errors; /* Number of packets with the error bit set */ unsigned int nb_pts_constant; /* Number of frames with constant PTS */ unsigned int nb_pts_early; /* Number of frames with early PTS */ unsigned int nb_pts_initial; /* Number of frames with initial PTS */ unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */ unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */ unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */ unsigned int scr_sof; /* STC.SOF of the last packet */ unsigned int min_sof; /* Minimum STC.SOF value */ unsigned int max_sof; /* Maximum STC.SOF value */ }; #define UVC_METADATA_BUF_SIZE 10240 /** * struct uvc_copy_op: Context structure to schedule asynchronous memcpy * * @buf: active buf object for this operation * @dst: copy destination address * @src: copy source address * @len: copy length */ struct uvc_copy_op { struct uvc_buffer *buf; void *dst; const __u8 *src; size_t len; }; /** * struct uvc_urb - URB context management structure * * @urb: the URB described by this context structure * @stream: UVC streaming context * @buffer: memory storage for the URB * @dma: Allocated DMA handle * @sgt: sgt_table with the urb locations in memory * @async_operations: counter to indicate the number of copy operations * @copy_operations: work descriptors for asynchronous copy operations * @work: work queue entry for asynchronous decode */ struct uvc_urb { struct urb *urb; struct uvc_streaming *stream; char *buffer; dma_addr_t dma; struct sg_table *sgt; unsigned int async_operations; struct uvc_copy_op copy_operations[UVC_MAX_PACKETS]; struct work_struct work; }; struct uvc_streaming { struct list_head list; struct uvc_device *dev; struct video_device vdev; struct uvc_video_chain *chain; atomic_t active; struct usb_interface *intf; int intfnum; u16 maxpsize; struct uvc_streaming_header header; enum v4l2_buf_type type; unsigned int nformats; const struct uvc_format *formats; struct uvc_streaming_control ctrl; const struct uvc_format *def_format; const struct uvc_format *cur_format; const struct uvc_frame *cur_frame; /* * Protect access to ctrl, cur_format, cur_frame and hardware video * probe control. */ struct mutex mutex; /* Buffers queue. */ unsigned int frozen : 1; struct uvc_video_queue queue; struct workqueue_struct *async_wq; void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf, struct uvc_buffer *meta_buf); struct { struct video_device vdev; struct uvc_video_queue queue; u32 format; } meta; /* Context data used by the bulk completion handler. */ struct { u8 header[256]; unsigned int header_size; int skip_payload; u32 payload_size; u32 max_payload_size; } bulk; struct uvc_urb uvc_urb[UVC_URBS]; unsigned int urb_size; u32 sequence; u8 last_fid; /* debugfs */ struct dentry *debugfs_dir; struct { struct uvc_stats_frame frame; struct uvc_stats_stream stream; } stats; /* Timestamps support. */ struct uvc_clock { struct uvc_clock_sample { u32 dev_stc; u16 dev_sof; u16 host_sof; ktime_t host_time; } *samples; unsigned int head; unsigned int count; unsigned int size; u16 last_sof; u16 sof_offset; u8 last_scr[6]; spinlock_t lock; } clock; }; #define for_each_uvc_urb(uvc_urb, uvc_streaming) \ for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \ (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \ ++(uvc_urb)) static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb) { return uvc_urb - &uvc_urb->stream->uvc_urb[0]; } struct uvc_device_info { u32 quirks; u32 meta_format; u16 uvc_version; const struct uvc_control_mapping **mappings; }; struct uvc_status_streaming { u8 button; } __packed; struct uvc_status_control { u8 bSelector; u8 bAttribute; u8 bValue[11]; } __packed; struct uvc_status { u8 bStatusType; u8 bOriginator; u8 bEvent; union { struct uvc_status_control control; struct uvc_status_streaming streaming; }; } __packed; struct uvc_device { struct usb_device *udev; struct usb_interface *intf; unsigned long warnings; u32 quirks; int intfnum; char name[32]; const struct uvc_device_info *info; struct mutex lock; /* Protects users */ unsigned int users; atomic_t nmappings; /* Video control interface */ #ifdef CONFIG_MEDIA_CONTROLLER struct media_device mdev; #endif struct v4l2_device vdev; u16 uvc_version; u32 clock_frequency; struct list_head entities; struct list_head chains; /* Video Streaming interfaces */ struct list_head streams; struct kref ref; /* Status Interrupt Endpoint */ struct usb_host_endpoint *int_ep; struct urb *int_urb; struct uvc_status *status; bool flush_status; struct input_dev *input; char input_phys[64]; struct uvc_ctrl_work { struct work_struct work; struct urb *urb; struct uvc_video_chain *chain; struct uvc_control *ctrl; const void *data; } async_ctrl; struct uvc_entity *gpio_unit; }; enum uvc_handle_state { UVC_HANDLE_PASSIVE = 0, UVC_HANDLE_ACTIVE = 1, }; struct uvc_fh { struct v4l2_fh vfh; struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; }; struct uvc_driver { struct usb_driver driver; }; /* ------------------------------------------------------------------------ * Debugging, printing and logging */ #define UVC_DBG_PROBE (1 << 0) #define UVC_DBG_DESCR (1 << 1) #define UVC_DBG_CONTROL (1 << 2) #define UVC_DBG_FORMAT (1 << 3) #define UVC_DBG_CAPTURE (1 << 4) #define UVC_DBG_CALLS (1 << 5) #define UVC_DBG_FRAME (1 << 7) #define UVC_DBG_SUSPEND (1 << 8) #define UVC_DBG_STATUS (1 << 9) #define UVC_DBG_VIDEO (1 << 10) #define UVC_DBG_STATS (1 << 11) #define UVC_DBG_CLOCK (1 << 12) #define UVC_WARN_MINMAX 0 #define UVC_WARN_PROBE_DEF 1 #define UVC_WARN_XU_GET_RES 2 extern unsigned int uvc_clock_param; extern unsigned int uvc_no_drop_param; extern unsigned int uvc_dbg_param; extern unsigned int uvc_timeout_param; extern unsigned int uvc_hw_timestamps_param; #define uvc_dbg(_dev, flag, fmt, ...) \ do { \ if (uvc_dbg_param & UVC_DBG_##flag) \ dev_printk(KERN_DEBUG, &(_dev)->udev->dev, fmt, \ ##__VA_ARGS__); \ } while (0) #define uvc_dbg_cont(flag, fmt, ...) \ do { \ if (uvc_dbg_param & UVC_DBG_##flag) \ pr_cont(fmt, ##__VA_ARGS__); \ } while (0) #define uvc_warn_once(_dev, warn, fmt, ...) \ do { \ if (!test_and_set_bit(warn, &(_dev)->warnings)) \ dev_info(&(_dev)->udev->dev, fmt, ##__VA_ARGS__); \ } while (0) /* -------------------------------------------------------------------------- * Internal functions. */ /* Core driver */ extern struct uvc_driver uvc_driver; struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); /* Video buffers queue management. */ int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, int drop_corrupted); void uvc_queue_release(struct uvc_video_queue *queue); int uvc_request_buffers(struct uvc_video_queue *queue, struct v4l2_requestbuffers *rb); int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf); int uvc_create_buffers(struct uvc_video_queue *queue, struct v4l2_create_buffers *v4l2_cb); int uvc_queue_buffer(struct uvc_video_queue *queue, struct media_device *mdev, struct v4l2_buffer *v4l2_buf); int uvc_export_buffer(struct uvc_video_queue *queue, struct v4l2_exportbuffer *exp); int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf, int nonblocking); int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type); int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type); void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf); struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue); void uvc_queue_buffer_release(struct uvc_buffer *buf); int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, poll_table *wait); #ifndef CONFIG_MMU unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, unsigned long pgoff); #endif int uvc_queue_allocated(struct uvc_video_queue *queue); static inline int uvc_queue_streaming(struct uvc_video_queue *queue) { return vb2_is_streaming(&queue->queue); } static inline struct uvc_streaming * uvc_queue_to_stream(struct uvc_video_queue *queue) { return container_of(queue, struct uvc_streaming, queue); } /* V4L2 interface */ extern const struct v4l2_ioctl_ops uvc_ioctl_ops; extern const struct v4l2_file_operations uvc_fops; /* Media controller */ int uvc_mc_register_entities(struct uvc_video_chain *chain); void uvc_mc_cleanup_entity(struct uvc_entity *entity); /* Video */ int uvc_video_init(struct uvc_streaming *stream); int uvc_video_suspend(struct uvc_streaming *stream); int uvc_video_resume(struct uvc_streaming *stream, int reset); int uvc_video_start_streaming(struct uvc_streaming *stream); void uvc_video_stop_streaming(struct uvc_streaming *stream); int uvc_probe_video(struct uvc_streaming *stream, struct uvc_streaming_control *probe); int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit, u8 intfnum, u8 cs, void *data, u16 size); void uvc_video_clock_update(struct uvc_streaming *stream, struct vb2_v4l2_buffer *vbuf, struct uvc_buffer *buf); int uvc_meta_register(struct uvc_streaming *stream); int uvc_register_video_device(struct uvc_device *dev, struct uvc_streaming *stream, struct video_device *vdev, struct uvc_video_queue *queue, enum v4l2_buf_type type, const struct v4l2_file_operations *fops, const struct v4l2_ioctl_ops *ioctl_ops); /* Status */ int uvc_status_init(struct uvc_device *dev); void uvc_status_unregister(struct uvc_device *dev); void uvc_status_cleanup(struct uvc_device *dev); int uvc_status_start(struct uvc_device *dev, gfp_t flags); void uvc_status_stop(struct uvc_device *dev); /* Controls */ extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited; extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11; extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops; int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl); int uvc_query_v4l2_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu); int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping); int uvc_ctrl_init_device(struct uvc_device *dev); void uvc_ctrl_cleanup_device(struct uvc_device *dev); int uvc_ctrl_restore_values(struct uvc_device *dev); bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data); void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data); int uvc_ctrl_begin(struct uvc_video_chain *chain); int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, struct v4l2_ext_controls *ctrls); static inline int uvc_ctrl_commit(struct uvc_fh *handle, struct v4l2_ext_controls *ctrls) { return __uvc_ctrl_commit(handle, 0, ctrls); } static inline int uvc_ctrl_rollback(struct uvc_fh *handle) { return __uvc_ctrl_commit(handle, 1, NULL); } int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl); int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, const struct v4l2_ext_controls *ctrls, unsigned long ioctl); int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); /* Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr); u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep); /* Quirks support */ void uvc_video_decode_isight(struct uvc_urb *uvc_urb, struct uvc_buffer *buf, struct uvc_buffer *meta_buf); /* debugfs and statistics */ void uvc_debugfs_init(void); void uvc_debugfs_cleanup(void); void uvc_debugfs_init_stream(struct uvc_streaming *stream); void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, size_t size); #endif
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