snd_hdac_bu...stream_pages(9)

✨ NAME ✨

snd_hdac_bus_alloc_stream_pages — bestie, this is the one that allocates your BDL and all the other buffers 💖

(it's from the Kernel API Manual, iykyk 👑)

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✨ SYNOPSIS ✨

int snd_hdac_bus_alloc_stream_pages (struct hdac_bus *bus );

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✨ ARGUMENTS ✨

• bus — your HD-audio core bus 🎀 that's the whole vibe, she's the main character here

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🌸 DESCRIPTION 🌸

Okay so listen 👂 — call this after you've assigned the all streams. Yeah, all of them. Don't come at her before that, she's not ready 🫶.

What does she give you back? zero for success ✨, or a negative error code if things went 💀. That's it, that's the whole contract, no cap.

fr fr, the ordering matters: assign the streams first, then call this. Not the other way around 🙈.

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🦋 SEE ALSO 🦋

Kernel file ./sound/hda/core/controller.c — go read the source, it's giving iconic:

• snd_hdac_bus_init_cmd_io(9)
• snd_hdac_bus_stop_cmd_io(9)
• snd_hdac_bus_send_cmd_pio(9)
• snd_hdac_bus_get_response_pio(9)
• snd_hdac_bus_send_cmd_corb(9)
• snd_hdac_bus_update_rirb(9)
• snd_hdac_bus_get_response_rirb(9)
• snd_hdac_bus_send_cmd(9)
• snd_hdac_bus_get_response(9)
• snd_hdac_bus_parse_capabilities(9)
• snd_hdac_bus_enter_link_reset(9)
• snd_hdac_bus_exit_link_reset(9)
• snd_hdac_bus_init_chip(9)
• snd_hdac_bus_stop_chip(9)
• snd_hdac_bus_handle_stream_irq(9)
• snd_hdac_bus_free_stream_pages(9)
• snd_hdac_bus_link_power(9)

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and that's the whole page, bestie 💅 go forth and allocate responsibly 🌈

sign-off szn 🎀 — this lil masterpiece lives in ./sound/hda/core, dated October 2026, straight out of the Kernel API Manual. mwah 💜