snd_soc_usb_connect(9)

💅 snd_soc_usb_connect(9) — Kernel API Manual, bestie edition 🎀

okay so this is snd_soc_usb_connect(9) straight out of the Kernel API Manual, and it's literally the "hey bestie, a USB thing just showed up" announcement of the sound subsystem. tiny page, big slay. let's get into it ✨

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🌸 NAME 🌸

snd_soc_usb_connect — the notification that a USB device connected. that's it, that's the whole vibe 💖

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🦋 SYNOPSIS 🦋

int snd_soc_usb_connect (struct device *usbdev , struct
       snd_soc_usb_device *sdev );

returns an int, takes two args. short and iconic 🫶

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💜 ARGUMENTS 💜

• usbdev — the USB bus device. the actual physical-ish USB thing on the bus, main character energy 🔥
• sdev — the USB SND device to add. the sound-side bestie getting added to the party 🎀

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⭐ DESCRIPTION ⭐

so what it does: it notifies of a new USB SND device connection. that's the whole job. no cap.

and here's the detail you do not wanna skip — sdev->card_idx can be used to handle how the DPCM backend selects, which device to enable USB offloading on. iykyk 👑

like, sdev->card_idx is the little field doing the heavy lifting for the DPCM backend's selection logic. don't sleep on it 💅

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🌈 SEE ALSO 🌈

the whole friend group, fr fr:

• Kernel file ./sound/soc/soc-usb.c — go read it, it's giving source of truth 📖
• snd_soc_usb_setup_offload_jack(9)
• snd_soc_usb_update_offload_route(9)
• snd_soc_usb_find_priv_data(9)
• snd_soc_usb_find_supported_format(9)
• snd_soc_usb_allocate_port(9)
• snd_soc_usb_free_port(9)
• snd_soc_usb_add_port(9)
• snd_soc_usb_remove_port(9)
• snd_soc_usb_disconnect(9)

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and that's the page!! 🎉 sourced from ./sound/soc, dated October 2026 — so go forth, connect those USB SND devices, and slay 💅✨🦋🍓💖