acpi_nhlt_tb_find_fmtcfg(9)

📦 version 7.3.1, in nixpkgs unstable

💅 acpi_nhlt_tb_find_fmtcfg — it's in the kernel API manual bestie

okay so picture this: you've got a NHLT table and you need to find ONE specific format in it. That's literally this function. It's a search. It's giving "ctrl+F but make it kernel-space." ✨

🌸 SYNOPSIS 🌸

struct acpi_nhlt_format_config * acpi_nhlt_tb_find_fmtcfg (const struct
acpi_table_nhlt *tb , int link_type , int dev_type , int dir , int
bus_id , u16 ch , u32 rate , u16 vbps , u16 bps );

like yes she takes nine whole arguments, she's high maintenance, but she delivers 🫶

🎀 ARGUMENTS 🎀

  • tb — the table you're searching, bestie. the whole vibe. the thing.
  • link_type — the hardware link type, e.g.: PDM or SSP.
  • dev_type — the device type.
  • dir — stream direction.
  • bus_id — the ID of virtual bus hosting the endpoint.
  • ch — number of channels.
  • rate — samples per second.
  • vbps — valid bits per sample.
  • bps — bits per sample.

🦋 DESCRIPTION 🦋

so here's the cute part 👑 either of link_type, dev_type, dir or bus_id may be set to a negative value to ignore the parameter during the search. That's it. That's the whole trick. Wildcard energy, no cap. 🌈

ngl this is genuinely iconic of her — negative number in, "pretend I didn't see that parameter," out. 💅

⭐ RETURN ⭐

  • A pointer to the format matching the criteria 💖
  • NULL if it's not found 🙈
  • or an ERR_PTR otherwise 😭

🔥 SEE ALSO 🔥

the whole friend group fr fr 🫶

okay that's the whole page, mwah 💋 it lives at ./drivers/acpi, it's dated October 2026, and it's part of the Kernel API Manual — go find your format bestie, you've got this 🎀✨

📦 where this page comes from