STRUCT TCS_CMD(9)

💖 NAME — struct tcs_cmd(9) 💖

okay so bestie, welcome to the Kernel API Manual page for struct tcs_cmd(9) — and struct tcs_cmd is literally an individual request to RPMH. iconic little request behavior ✨

🦋 SYNOPSIS 🦋

struct tcs_cmd {
    u32 addr;
    u32 data;
    u32 wait;
 };

💅 Members 💅

• addr — the address of the resource slv_id:18:16 | offset:0:15. location, location, location ✨
• data — the resource state request. the actual ask 👑
• wait — ensure that this command is complete before returning. wait means wait, bestie ⏳

okay so setting wait here only makes sense during rpmh_write_batch for active-only transfers, this is because:

• rpmh_write — Always waits. (DEFINE_RPMH_MSG_ONSTACK will set .wait_for_compl) always waits, no cap 🕰️
• rpmh_write_async — Never waits. (There's no request completion callback) never waits, periodt 💀

🔥 SEE ALSO 🔥

• Kernel file ./include/soc/qcom/tcs.h
• struct tcs_request(9)

okay bye bestie, this cutie lives in ./include/soc/qcom, October 2026 edition, and it’s the struct tcs_cmd(9) page — mwah 💋💖