amdtp_stream_start(9)

💅 amdtp_stream_start(9) 💅

okay so this is a page from the Kernel API Manual, bestie — it's the amdtp_stream_start page and it's literally the "go go go" button for packet transfer ✨

---

🎀 NAME 🎀

amdtp_stream_start — start transferring packets 💌

---

✨ SYNOPSIS ✨

int amdtp_stream_start (struct amdtp_stream *s , int channel , int speed
, unsigned int queue_size , unsigned int idle_irq_interval );

like yes she returns an int, no we're not gonna overthink it 🫶

---

🦋 ARGUMENTS 🦋

• s — the AMDTP stream you're starting. your main character, fr 💅
• channel — the isochronous channel on the bus 📡
• speed — the firewire speed code. yes it's a code, no you don't get to vibe-check it 🌸
• queue_size — the number of packets in the queue 📦
• idle_irq_interval — the interval to queue packet during the initial state ⏱️

---

🌈 DESCRIPTION 🌈

okay so here's the tea 👑 — the stream cannot be started until it's been configured with amdtp_stream_set_parameters. like, it's not ready, it needs its little outfit picked out first 🎀

and it must be started before any PCM or MIDI device can be started. no stream start, no devices. that's the rule, periodt 💀

---

🔥 SEE ALSO 🔥

kernel file ./sound/firewire/amdtp-stream.c — go read the source, iykyk 📖

• amdtp_stream_init(9)
• amdtp_stream_destroy(9)
• amdtp_stream_add_pcm_hw_constraints(9)
• amdtp_stream_set_parameters(9)
• amdtp_stream_get_max_payload(9)
• amdtp_stream_pcm_prepare(9)
• amdtp_domain_stream_pcm_pointer(9)
• amdtp_domain_stream_pcm_ack(9)
• amdtp_stream_update(9)
• amdtp_stream_stop(9)
• amdtp_stream_pcm_abort(9)
• amdtp_domain_init(9)
• amdtp_domain_destroy(9)
• amdtp_domain_add_stream(9)
• amdtp_domain_start(9)
• amdtp_domain_stop(9)

like, the whole friend group showed up 🫶✨

---

ngl the set_parameters-then-start order is not a suggestion, it's a whole vibe requirement 💜

---

and that's the page!! this one lives at ./sound/firewire, dated October 2026 — mwah, take care of her 💖🎀🦋