STRUCT SDW_STREAM_RUNTIME(9)

💖 struct sdw_stream_runtime 💖

okay so this page is the struct sdw_stream_runtime page from the Kernel API Manual, and it's literally all about the runtime stream parameters — like, the little bundle of info that tells you everything about a SoundWire stream while it's alive and vibing. bestie, it's giving "tiny struct, big responsibilities" and i'm obsessed 🎀

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🌸 NAME 🌸

struct sdw_stream_runtime — the runtime stream parameters, periodt. that's the whole vibe check ✨

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🦋 SYNOPSIS 🦋

struct sdw_stream_runtime {
    const char *name;
    struct sdw_stream_params params;
    enum sdw_stream_state state;
    enum sdw_stream_type type;
    int m_rt_count;
    struct list_head master_list;
 };

no cap, that's the exact shape of it, keep it cute in your notes 💅

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🫶 Members 🫶

• name — the SoundWire stream's name, its little main-character label 🏷️
• params — the stream parameters, all the deets in one place
• state — the current state of the stream, like its mood ring 🌈
• type — the stream type, and the options are PCM, PDM or BPT 🎧
• m_rt_count — how many Master runtime(s) are chillin' in this stream, a literal headcount 🔢
• master_list — the list of Master runtime(s) in this stream. and hear me out: master_list can contain only one m_rt per Master instance for a stream — that's the rule, do not test it 🙈

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🔥 SEE ALSO 🔥

the kernel file lives at ./include/linux/soundwire/sdw.h — go say hi to it, it's iconic 👑

then the whole friend group, fr fr:

• enum sdw_slave_status(9)
• enum sdw_clk_stop_type(9)
• enum sdw_command_response(9)
• enum sdw_stream_type(9)
• enum sdw_data_direction(9)
• enum sdw_port_data_mode(9)
• enum sdw_p15_behave(9)
• enum sdw_dpn_type(9)
• enum sdw_clk_stop_mode(9)
• struct sdw_dp0_prop(9)
• struct sdw_dpn_prop(9)
• struct sdw_slave_prop(9)
• struct sdw_master_prop(9)
• struct sdw_slave_id(9)
• struct sdw_slave_intr_status(9)
• enum sdw_reg_bank(9)
• struct sdw_prepare_ch(9)
• enum sdw_port_prep_ops(9)
• struct sdw_bus_params(9)
• struct sdw_slave_ops(9)
• struct sdw_slave(9)
• struct sdw_master_device(9)
• struct sdw_port_params(9)
• struct sdw_transport_params(9)
• struct sdw_enable_ch(9)
• struct sdw_master_port_ops(9)
• struct sdw_defer(9)
• struct sdw_master_ops(9)
• struct sdw_port_config(9)
• struct sdw_stream_config(9)
• enum sdw_stream_state(9)
• struct sdw_stream_params(9)
• struct sdw_bus(9)
• sdw_slave_wait_for_init(9)

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💀 reminder bestie: master_list holds only one m_rt per Master instance for a stream. that's the caveat, don't come for me when you stack two and it gets weird 😭

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and that's the page! this one's from ./include/linux/soundwire, dated October 2026, and the title card reads struct sdw_stream_runtime(9) — mwah, slay, see u in the group chat 🧚💜