ENUM SDCA_ENTITY_TYPE(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 NAME 🌸

enum sdca_entity_type — the SDCA Entity Type codes, bestie.

Okay so real talk, this is a Kernel API Manual page (section 9, iykyk), and it's literally just the glow-up glossary of every entity type in SDCA. No cap, it's giving "the cast list of the audio kernel musical" 🎭✨

✨ SYNOPSIS ✨

enum sdca_entity_type {
    SDCA_ENTITY_TYPE_ENTITY_0 ,
    SDCA_ENTITY_TYPE_IT ,
    SDCA_ENTITY_TYPE_OT ,
    SDCA_ENTITY_TYPE_MU ,
    SDCA_ENTITY_TYPE_SU ,
    SDCA_ENTITY_TYPE_FU ,
    SDCA_ENTITY_TYPE_XU ,
    SDCA_ENTITY_TYPE_CS ,
    SDCA_ENTITY_TYPE_CX ,
    SDCA_ENTITY_TYPE_PDE ,
    SDCA_ENTITY_TYPE_GE ,
    SDCA_ENTITY_TYPE_SPE ,
    SDCA_ENTITY_TYPE_CRU ,
    SDCA_ENTITY_TYPE_UDMPU ,
    SDCA_ENTITY_TYPE_MFPU ,
    SDCA_ENTITY_TYPE_SMPU ,
    SDCA_ENTITY_TYPE_SAPU ,
    SDCA_ENTITY_TYPE_PPU ,
    SDCA_ENTITY_TYPE_TG ,
    SDCA_ENTITY_TYPE_HIDE

};

🎀 Constants 🎀

Hiii so each one of these is a member of that enum up there 👆 and here's the tea on every single one of them, no skipping, we are eating the whole plate 🍓

  • SDCA_ENTITY_TYPE_ENTITY_0 — Lowkey iconic: this is Entity 0, and ngl it's not actually from the specification 🙈 but it's mad useful internally, because an Entity structure gets allocated for Entity 0 so it can hold the Entity 0 controls. She's not canon but she's main character energy 💅
  • SDCA_ENTITY_TYPE_IT — Input Terminal. Where the audio comes in 🎤
  • SDCA_ENTITY_TYPE_OT — Output Terminal. Where it heads out 🚪
  • SDCA_ENTITY_TYPE_MU — Mixer Unit. Stirring the pot 🥣
  • SDCA_ENTITY_TYPE_SU — Selector Unit. Choosing, as one does ✨
  • SDCA_ENTITY_TYPE_FU — Feature Unit. The whole point of it 💖
  • SDCA_ENTITY_TYPE_XU — Extension Unit. Extra. In the best way 🦋
  • SDCA_ENTITY_TYPE_CS — Clock Source. Timekeeper realness ⏰
  • SDCA_ENTITY_TYPE_CX — Clock selector. (Yes, lowercase selector in the original — I don't make the rules, I just report them 💀)
  • SDCA_ENTITY_TYPE_PDE — Power-Domain Entity. She manages the power, periodt ⚡
  • SDCA_ENTITY_TYPE_GE — Group Entity. Squad goals, literally 🫶
  • SDCA_ENTITY_TYPE_SPE — Security & Privacy Entity. Your secrets are safe with her 🔒
  • SDCA_ENTITY_TYPE_CRU — Channel Remapping Unit. Shuffling channels around 🔀
  • SDCA_ENTITY_TYPE_UDMPU — Up-Down Mixer Processing Unit. Up, down, mixer, processing — the whole vibe 🌀
  • SDCA_ENTITY_TYPE_MFPU — Multi-Function Processing Unit. Multitasking queen 👑
  • SDCA_ENTITY_TYPE_SMPU — Smart Microphone Processing Unit. Smart AND a microphone, she's booked and busy 🎙️
  • SDCA_ENTITY_TYPE_SAPU — Smart Amp Processing Unit. Amp but make it smart 🔊
  • SDCA_ENTITY_TYPE_PPU — Posture Processing Unit. Standing up straight, posture check 🧍‍♀️
  • SDCA_ENTITY_TYPE_TG — Tone Generator. Beep boop, she generates tones 🎵
  • SDCA_ENTITY_TYPE_HIDE — Human Interface Device Entity. HID energy, hi bestie 👋

🦋 DESCRIPTION 🦋

So these are the SDCA Entity Types straight from the SDCA specification v1.0 Section 6.1.2 — that's the source, fr fr 📖✨

💀 Heads up bestie: every Entity Type that isn't described here is reserved. Not missing, not forgotten — reserved. Do not come for them, they're spoken for.

💖 SEE ALSO 💖

Okay so this is the part where the manpage just names-drops the entire friend group 😭 and we are not leaving a single one out:

  • Kernel file ./include/sound/sdca_function.h
  • enum sdca_function_type(9)
  • struct sdca_init_write(9)
  • SDCA_CTL_TYPE(9)
  • SDCA_CTL_TYPE_S(9)
  • enum sdca_messageoffset_range(9)
  • enum sdca_ump_mode(9)
  • enum sdca_ump_owner(9)
  • enum sdca_it_controls(9)
  • enum sdca_ot_controls(9)
  • enum sdca_usage_range(9)
  • enum sdca_dataport_selector_range(9)
  • enum sdca_mu_controls(9)
  • enum sdca_su_controls(9)
  • enum sdca_fu_controls(9)
  • enum sdca_volume_range(9)
  • enum sdca_xu_controls(9)
  • enum sdca_fdl_set_index_range(9)
  • enum sdca_cs_controls(9)
  • enum sdca_samplerateindex_range(9)
  • enum sdca_cx_controls(9)
  • enum sdca_pde_controls(9)
  • enum sdca_requested_ps_range(9)
  • enum sdca_ge_controls(9)
  • enum sdca_selected_mode_range(9)
  • enum sdca_detected_mode_values(9)
  • enum sdca_spe_controls(9)
  • enum sdca_cru_controls(9)
  • enum sdca_udmpu_controls(9)
  • enum sdca_mfpu_controls(9)
  • enum sdca_smpu_controls(9)
  • enum sdca_sapu_controls(9)
  • enum sdca_ppu_controls(9)
  • enum sdca_tg_controls(9)
  • enum sdca_hide_controls(9)
  • enum sdca_entity0_controls(9)
  • enum sdca_control_datatype(9)
  • enum sdca_access_mode(9)
  • enum sdca_access_layer(9)
  • struct sdca_control_range(9)
  • struct sdca_control(9)
  • enum sdca_terminal_type(9)
  • enum sdca_connector_type(9)
  • struct sdca_entity_iot(9)
  • enum sdca_clock_type(9)
  • struct sdca_entity_cs(9)
  • enum sdca_pde_power_state(9)
  • struct sdca_pde_delay(9)
  • struct sdca_entity_pde(9)
  • struct sdca_ge_control(9)
  • struct sdca_ge_mode(9)
  • struct sdca_entity_ge(9)
  • struct sdca_entity_hide(9)
  • enum sdca_xu_reset_mechanism(9)
  • struct sdca_entity_xu(9)
  • struct sdca_entity(9)
  • enum sdca_channel_purpose(9)
  • enum sdca_channel_relationship(9)
  • struct sdca_channel(9)
  • struct sdca_cluster(9)
  • enum sdca_cluster_range(9)
  • struct sdca_fdl_file(9)
  • struct sdca_fdl_set(9)
  • struct sdca_fdl_data(9)
  • struct sdca_function_hid(9)
  • struct sdca_function_data(9)

That's the whole page, bestie, you ate that 🫶✨ Shoutout to the <pink>./include/sound</pink> directory for housing all this, and to <yellow>October 2026</yellow> for the timestamp on the original page — iconic of them, honestly. Now go read something in section 9 and slay 💅🎀

📦 where this page comes from