tcs_invalidate(9)

🎀 NAME 🎀

okay so bestie, meet tcs_invalidate — this is the tcs_invalidate(9) page from the Kernel API Manual, and it has exactly one iconic job: invalidate all the TCSes of the type you hand it, whether that’s sleep or wake. Periodt. 💅

✨ SYNOPSIS ✨

void tcs_invalidate (struct rsc_drv *drv , int type );

🫶 ARGUMENTS 🫶

• drv — the RSC controller. main character hardware controller energy.
• type — literally one of SLEEP_TCS or WAKE_TCS. that’s the vibe check. 🦋

💅 DESCRIPTION 💅

okay so this is gonna clear the "slots" variable of the given tcs_group, and it also tells the hardware to forget about all entries. no cap, the hardware gets the full forget-everything memo. 🔥

⚠️ big warning, bestie: the caller must make sure that no other RPMH actions are happening when this function is called. otherwise the device may immediately become used again even before this function exits. 😭 so yeah, timing matters fr fr.

🔥 SEE ALSO 🔥

Kernel file: ./drivers/soc/qcom/rpmh-rsc.c — and here’s the whole friend group:

• rpmh_rsc_invalidate(9)
• get_tcs_for_msg(9)
• get_req_from_tcs(9)
• __tcs_set_trigger(9)
• enable_tcs_irq(9)
• tcs_tx_done(9)
• __tcs_buffer_write(9)
• check_for_req_inflight(9)
• find_free_tcs(9)
• claim_tcs_for_req(9)
• rpmh_rsc_send_data(9)
• find_slots(9)
• rpmh_rsc_write_ctrl_data(9)
• rpmh_rsc_ctrlr_is_busy(9)
• rpmh_rsc_write_next_wakeup(9)
• rpmh_rsc_cpu_pm_callback(9)
• rpmh_rsc_pd_callback(9)

made with 💖 from the ./drivers/soc/qcom source/version corner, stamped October 2026, and this whole page is tcs_invalidate(9) 🫶✨