UNION SOF_IPC4_RESOURCE_EVENT_DATA(9)

💅 union sof_ipc4_resource_event_data — NAME

okay so bestie, this is union sof_ipc4_resource_event_data(9), and it's literally just the payload for resource events ✨ like, the little bag of bytes that a resource event hands you. that's the whole vibe. it's a union, so it's one blob that can be read three different ways depending on what actually showed up 👑

🦋 SYNOPSIS

union sof_ipc4_resource_event_data {
    uint32_t dws[6];
    struct sof_ipc4_process_data_error_event_data process_data_error;
    struct sof_ipc4_mixer_underrun_event_data mixer_underrun;
 };

no cap, that's the whole thing. three members, one union, endlessly iconic 🎀

🌸 Members

• dws — the raw event data payload, as six dwords. six of them. uint32_t dws[6]. this is the "just give me the bytes" option and honestly? valid 🙈
• process_data_error — the SOF_IPC4_PROCESS_DATA_ERROR payload. it's typed as struct sof_ipc4_process_data_error_event_data, so when the event is a process data error you read it through here 🫶
• mixer_underrun — the SOF_IPC4_MIXER_UNDERRUN_DETECTED payload. typed as struct sof_ipc4_mixer_underrun_event_data. mixer underran, and now you know 💀

⚠️ reminder that it's a union, so these three are stacked on top of each other in the same memory. you read one of them, not all three. that's the whole point. iykyk 💅

👑 SEE ALSO

go touch some related grass, bestie, all in Kernel file ./include/sound/sof/ipc4/header.h:

• struct sof_ipc4_msg(9)
• struct sof_ipc4_tuple(9)
• struct sof_ipc4_process_data_error_event_data(9)
• struct sof_ipc4_mixer_underrun_event_data(9)
• struct sof_ipc4_notify_module_data(9)

okay that's the page!! 🎀 this little diva lives over in ./include/sound/sof/ipc4, dated October 2026, and it's filed under union sof_ip...e_event_data(9) — yes the footer really does abbreviate it like that, she's mysterious like that 💜 mwah, go read some header files, ily, bye 🦋✨