ENUM SDCA_USAGE_RANGE(9)

🎀 enum sdca_usage_range(9) 🎀

okay so bestie, welcome to the Kernel API Manual — yes we're in kernel land today, hold my iced coffee 💅. This page is all about enum sdca_usage_range, and honestly? It's giving "column definitions for Usage." That's the whole NAME section. Short, sweet, iconic.

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✨ SYNOPSIS ✨

like, here's the whole enum, verbatim, no cap:

enum sdca_usage_range {
    SDCA_USAGE_NUMBER ,
    SDCA_USAGE_CBN ,
    SDCA_USAGE_SAMPLE_RATE ,
    SDCA_USAGE_SAMPLE_WIDTH ,
    SDCA_USAGE_FULL_SCALE ,
    SDCA_USAGE_NOISE_FLOOR ,
    SDCA_USAGE_TAG ,
    SDCA_USAGE_NCOLS

};

that's it. that's the shape of it. every member in order, commas and all, we don't touch the code 🫶

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💅 Constants 💅

kk so here's the thing, and I need you to not come for me: the source page is literally marked -- undescribed -- for every single one of these. So we're keeping it 100 — there is no description here. But bestie, the names? the names are stunning. look at them:

• SDCA_USAGE_NUMBER — -- undescribed -- 🙈
• SDCA_USAGE_CBN — -- undescribed -- 🙈
• SDCA_USAGE_SAMPLE_RATE — -- undescribed -- 🙈
• SDCA_USAGE_SAMPLE_WIDTH — -- undescribed -- 🙈
• SDCA_USAGE_FULL_SCALE — -- undescribed -- 🙈
• SDCA_USAGE_NOISE_FLOOR — -- undescribed -- 🙈
• SDCA_USAGE_TAG — -- undescribed -- 🙈
• SDCA_USAGE_NCOLS — -- undescribed -- 🙈

that's all eight, in order, and I'm not out here inventing lore for them, because making up kernel facts would be so not slay of me. ✨

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🌈 SEE ALSO 🌈

okay this is the part where the page decides to list, like, everyone at the function. the whole friend group. all of it lives in the kernel file ./include/sound/sdca_function.h — here we go, alphabetically-ish, no one left out:

• 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_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_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)

see? everyone got an invite. 🦋

lowkey a warning bestie: nothing here is described on this page, so if you need actual semantics for those constants or any of the above, go read the header ./include/sound/sdca_function.h and the referenced pages. don't be out here guessing and then blaming me 😭

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and that's the whole page! 🌸 shoutout to the ./include/sound source for holding it down, dated October 2026, living in the Kernel API Manual — mwah, periodt, go read your kernel headers 💜🎀