STRUCT DVB_USB_DEVICE(9)

💅 struct dvb_usb_device(9) — Kernel API Manual realness ✨

okay so bestie, this is the manual page for struct dvb_usb_device (that'd be the object of a DVB USB device, iykyk) — straight outta the Kernel API Manual. buckle up, it's giving data-structure lore 🎀

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🌸 NAME 🌸

struct dvb_usb_device — the object of a DVB USB device. literally the main character of every dvb-usb driver 💖

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✨ SYNOPSIS ✨

struct dvb_usb_device {
    struct dvb_usb_device_properties props;
    const struct dvb_usb_device_description *desc;
    struct usb_device *udev;
  #define DVB_USB_STATE_INIT        0x000;
  #define DVB_USB_STATE_I2C         0x001;
  #define DVB_USB_STATE_DVB         0x002;
  #define DVB_USB_STATE_REMOTE      0x004;
    int state;
    int powered;
    struct mutex data_mutex;
    struct mutex usb_mutex;
    struct mutex i2c_mutex;
    struct i2c_adapter i2c_adap;
    int num_adapters_initialized;
    struct dvb_usb_adapter adapter[MAX_NO_OF_ADAPTER_PER_DEVICE];
    struct rc_dev *rc_dev;
    struct input_dev *input_dev;
    char rc_phys[64];
    struct delayed_work rc_query_work;
    u32 last_event;
    int last_state;
    struct module *owner;
    void *priv;
 };

she's long, she's detailed, she's iconic 👑

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🦋 Members 🦋

• props — a copy of the struct dvb_usb_properties that this device belongs to. like, which family she's from 💅
• desc — pointer to the device's struct dvb_usb_device_description.
• udev — pointer to the device's struct usb_device.
• state — the initialization and runtime state of the device. the vibe check variable, fr fr 💫
• powered — says whether the device is powered or not. no cap: powered gets in/decremented on each call to modify the state. it's a lil counter, okay 😌
• data_mutex — mutex that protects the data structure used to store URB data 🔒
• usb_mutex — mutex of USB control messages (reading needs two messages, don't ask 😭). ⚠️ please notice: this mutex is used internally at the generic URB control functions. so if your driver uses dvb_usb_generic_rw and derived functions, do not lock it internally — that's a one-way ticket to deadlock city 💀
• i2c_mutex — mutex for i2c-transfers 🎀
• i2c_adap — the device's i2c_adapter, if it uses I2CoverUSB ✨
• num_adapters_initialized — number of initialized adapters. a headcount, basically 🧮
• adapter — the adapters themselves 🫶
• rc_dev — rc device for the remote control (rc-core mode) 📺
• input_dev — input device for the remote control (legacy mode) — yes both modes exist, she's versatile 💁‍♀️
• rc_phys — the rc device path 🌈
• rc_query_work — a struct work_struct for frequent rc queries. she works hard ⭐
• last_event — the last triggered event 🔥
• last_state — the last state (no, pressed, repeat) — pick a lane bestie 💀
• owner — owner of the dvb_adapter 👑
• priv — private data of the actual driver. it's allocated by dvb-usb, and the size is defined in size_of_priv of dvb_usb_properties 🙈

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💜 SEE ALSO 💜

the whole friend group 🫶 — the kernel file ./drivers/media/usb/dvb-usb/dvb-usb.h, plus:

• struct dvb_usb_device_description(9)
• struct dvb_usb_adapter_fe_properties(9)
• struct dvb_rc_legacy(9)
• struct dvb_rc(9)
• enum dvb_usb_mode(9)
• struct dvb_usb_device_properties(9)
• struct usb_data_stream(9)
• struct dvb_usb_fe_adapter(9)
• struct dvb_usb_adapter(9)

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reminder bestie: this is kernel API, so treat the mutexes with the respect they deserve or the kernel will humble you 😭💅

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and that's the page!! sourced from ./drivers/media/usb/dvb-usb, dated October 2026, from the Kernel API Manual — struct dvb_usb_device(9) slayed, no notes, periodt 🌟🦋💖