STRUCT SDW_DPN_PROP(9)

💅 struct sdw_dpn_prop(9) — it's giving "Data Port DPn properties" ✨

okay so bestie, this is a page from the Kernel API Manual, and today's main character is struct sdw_dpn_prop — the Data Port DPn properties struct. yes it's a struct, yes it's in the kernel, no you cannot escape it. let's go 🎀

✨ SYNOPSIS ✨

like, here's the whole vibe in one block — do not touch, just read:

struct sdw_dpn_prop {
    u32 num;
    u32 max_word;
    u32 min_word;
    u32 num_words;
    u32 *words;
    enum sdw_dpn_type type;
    u32 max_grouping;
    u32 ch_prep_timeout;
    u32 imp_def_interrupts;
    u32 max_ch;
    u32 min_ch;
    u32 num_channels;
    u32 num_ch_combinations;
    u32 *channels;
    u32 *ch_combinations;
    u32 *lane_list;
    int num_lanes;
    u32 modes;
    u32 max_async_buffer;
    u32 port_encoding;
    bool block_pack_mode;
    bool read_only_wordlength;
    bool simple_ch_prep_sm;
 };

🌸 Members 🌸 (the whole cast, no skips, we stan every field)

• num — the port number 🎀
• max_word — biggest number of bits in a Payload Channel Sample, and it's 1 to 64 inclusive. periodt.
• min_word — smallest number of bits in a Payload Channel Sample, also 1 to 64 inclusive. lowkey symmetrical of it.
• num_words — how many discrete supported wordlengths there are
• words — the actual discrete supported wordlength 👑
• type — Data port type. it can be Full, Simplified or Reduced. choose your fighter ✨
• max_grouping — max number of samples that can be grouped together for a full data port. grouping is self-care fr fr
• ch_prep_timeout — a port-specific timeout value, measured in milliseconds ⏳
• imp_def_interrupts — if this is set, each bit corresponds to support for implementation-defined interrupts. bit girly 💅
• max_ch — maximum channels supported
• min_ch — minimum channels supported
• num_channels — number of discrete channels supported
• num_ch_combinations — number of channel combinations supported
• channels — the discrete channels supported 🦋
• ch_combinations — the channel combinations supported
• lane_list — shows which Lanes can be used by DPn 🛣️
• num_lanes — the array size of lane_list
• modes — SDW mode supported
• max_async_buffer — how many samples this port can buffer in asynchronous modes. buffering, iconic
• port_encoding — the Payload Channel Sample encoding schemes supported
• block_pack_mode — the type of block port mode supported
• read_only_wordlength — Read Only wordlength field in the DPN_BlockCtrl1 register. read only queen 🙈
• simple_ch_prep_sm — if the port supports the simplified channel prepare state machine. cute, efficient, we love her 💖

🌈 SEE ALSO 🌈

bestie there are SO many siblings, all of them living in the Kernel file ./include/linux/soundwire/sdw.h. say hi 👋

• 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_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_stream_runtime(9)
• struct sdw_bus(9)
• sdw_slave_wait_for_init(9)

ngl that's a lot of cross-references but every single one is here, no cap 🫶

and that's the whole page bestie 💜 this cutie came from ./include/linux/soundwire, dated October 2026 — scream it, struct sdw_dpn_prop(9), iconic, bye 😭💖