rt_sdca_button_detect(9)

🎀 rt_sdca_button_detect(9) 🎀

ok so bestie, welcome to the Kernel API Manual — this is the page for rt_sdca_button_detect, and she is literally the moment where the kernel reads a UMP message and decides what kind of button you just pressed. yes queen, button identification. 💅

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✨ NAME ✨

rt_sdca_button_detect — read the UMP message and decide the button type, periodt. 🔥

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🌸 SYNOPSIS 🌸

int rt_sdca_button_detect (struct regmap *map , unsigned int entity_id ,
unsigned int hid_buf_addr , unsigned int hid_id );

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🦋 ARGUMENTS 🦋

• map — the map for setting, iykyk 🗺️
• entity_id — the SDCA entity ID 🆔
• hid_buf_addr — the HID buffer address, like, the address of the buffer 📬
• hid_id — the Report ID for HID 📝

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💖 DESCRIPTION 💖

So the whole vibe is this: a button type gets returned regarding to the buffer — and if the buffer cannot be recognized, she returns zero. no cap, that's the fallback. 💀

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⭐ SEE ALSO ⭐

• Kernel file ./sound/soc/codecs/rt-sdw-common.c
• rt_sdca_index_write(9)
• rt_sdca_index_read(9)
• rt_sdca_index_update_bits(9)
• rt_sdca_btn_type(9)
• rt_sdca_headset_detect(9)

go read those too bestie, they're all in their main character era 🫶

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and that's the page!! this little icon lives over in ./sound/soc/codecs, and this version is dated October 2026 — ok bye, ily, go detect some buttons 🎀✨🦋