ENUM SDCA_CHANNEL_PURPOSE(9)

✨ enum sdca_channel_purpose — the SDCA Channel Purpose code buffet 💅

Okay bestie, so this page is from the Kernel API Manual (section 9, the kernel API section, iykyk) and it's literally just one big enum: enum sdca_channel_purpose. That's the SDCA Channel Purpose code. It's giving "one job, done iconically" 🎀

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🌸 SYNOPSIS 🌸

enum sdca_channel_purpose {
    SDCA_CHAN_PURPOSE_GENERIC_AUDIO ,
    SDCA_CHAN_PURPOSE_VOICE ,
    SDCA_CHAN_PURPOSE_SPEECH ,
    SDCA_CHAN_PURPOSE_AMBIENT ,
    SDCA_CHAN_PURPOSE_REFERENCE ,
    SDCA_CHAN_PURPOSE_ULTRASOUND ,
    SDCA_CHAN_PURPOSE_SENSE ,
    SDCA_CHAN_PURPOSE_SILENCE ,
    SDCA_CHAN_PURPOSE_NON_AUDIO ,
    SDCA_CHAN_PURPOSE_SENSE_V1 ,
    SDCA_CHAN_PURPOSE_SENSE_V2 ,
    SDCA_CHAN_PURPOSE_SENSE_V12_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V21_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V12_PACKED ,
    SDCA_CHAN_PURPOSE_SENSE_V21_PACKED ,
    SDCA_CHAN_PURPOSE_SENSE_V1212_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V2121_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V1122_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V2211_INTERLEAVED ,
    SDCA_CHAN_PURPOSE_SENSE_V1212_PACKED ,
    SDCA_CHAN_PURPOSE_SENSE_V2121_PACKED ,
    SDCA_CHAN_PURPOSE_SENSE_V1122_PACKED ,
    SDCA_CHAN_PURPOSE_SENSE_V2211_PACKED

};

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💖 Constants 💖

Okay so here's the thing, bestie: the original says -- undescribed -- for literally every single one of these. Twenty-three constants, zero descriptions. Not me being lazy, it's just what the page says 🙈 So here's the full roster, all shiny and accounted for:

• SDCA_CHAN_PURPOSE_GENERIC_AUDIO — undescribed
• SDCA_CHAN_PURPOSE_VOICE — undescribed
• SDCA_CHAN_PURPOSE_SPEECH — undescribed
• SDCA_CHAN_PURPOSE_AMBIENT — undescribed
• SDCA_CHAN_PURPOSE_REFERENCE — undescribed
• SDCA_CHAN_PURPOSE_ULTRASOUND — undescribed
• SDCA_CHAN_PURPOSE_SENSE — undescribed
• SDCA_CHAN_PURPOSE_SILENCE — undescribed
• SDCA_CHAN_PURPOSE_NON_AUDIO — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V1 — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V2 — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V12_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V21_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V12_PACKED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V21_PACKED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V1212_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V2121_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V1122_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V2211_INTERLEAVED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V1212_PACKED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V2121_PACKED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V1122_PACKED — undescribed
• SDCA_CHAN_PURPOSE_SENSE_V2211_PACKED — undescribed

Lowkey a vibe check fail on the docs side, but the names themselves ate 💀 Every single constant is listed above, no cap, none skipped.

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🦋 Description 🦋

These are the Channel Purpose codes, exactly as described in the SDCA specification v1.0 section 11.4.3. That's it, that's the whole description. Short king behavior, honestly 👑

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🌈 SEE ALSO 🌈

Kernel file ./include/sound/sdca_function.h, plus this whole friend group right here:

• 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)
• enum sdca_entity_type(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_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)

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🫶 Sign-off 🫶

This lil beauty lives in ./include/sound, and the version/date on the original is October 2026 ⭐ So yeah, future-dated, main character energy only. Go read your spec section 11.4.3 and slay, bestie 💜