amdtp_strea..._constraints(9)

🎀 amdtp_strea..._constraints(9) 🎀

okay so this is a page from the Kernel API Manual, bestie, and it's literally about one tiny little function that does one very specific glow-up job. no cap, it's short and sweet.

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✨ NAME ✨

amdtp_stream_add_pcm_hw_constraints — the function that adds hw constraints for PCM substream. that's it, that's the whole job description 💅

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🌸 SYNOPSIS 🌸

int amdtp_stream_add_pcm_hw_constraints (struct amdtp_stream *s , struct
snd_pcm_runtime *runtime );

it returns an int, iconically. 🫶

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🦋 ARGUMENTS 🦋

• s — the AMDTP stream, and bestie listen: it must be initialized. like, no initialized stream, no constraints, we don't make the rules (we do, actually, this is the docs). ⭐
• runtime — the PCM substream runtime. that's the other half of the duo, main character energy in its own right. 💖

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🔥 SEE ALSO 🔥

Kernel file: ./sound/firewire/amdtp-stream.c — go read it, iykyk. it's giving source of truth.

and the whole squad of related functions, all of them, not skipping a single one because we don't do that here:

• amdtp_stream_init(9)
• amdtp_stream_destroy(9)
• amdtp_stream_set_parameters(9)
• amdtp_stream_get_max_payload(9)
• amdtp_stream_pcm_prepare(9)
• amdtp_stream_start(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)

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lowkey, that's genuinely the whole page. no hidden options, no environment variables, no exit statuses to memorise. go off and add those constraints, queen. 👑

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mwah 💜 that's a wrap from the ./sound/firewire corner of the kernel, dated October 2026 — see u in the next manpage, bestie, stay slaying ✨🦋🎀