radeon_atpx_switch_end(9)

💅 radeon_atpx_switch_end(9) — Kernel API Manual 💅

okay bestie, welcome to the Kernel API Manual page for radeon_atpx_switch_end(9) — the little “we’re done here” notification for a GPU switch. 🫶

🌸 NAME 🌸

radeon_atpx_switch_end — notify the sbios of a GPU switch

✨ SYNOPSIS ✨

int radeon_atpx_switch_end (struct radeon_atpx *atpx , u16 mux_id );

🎀 ARGUMENTS 🎀

• atpx — atpx info struct. That’s the info bundle this call needs.
• mux_id — mux state (0 = integrated GPU, 1 = discrete GPU).

💖 DESCRIPTION 💖

okay so here’s the tea: this function executes the ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION ATPX function to notify the sbios that a switch between the discrete GPU and integrated GPU has ended — and yes, it covers all asics. Returns 0 on success, error on failure. no cap. ✨

🦋 SEE ALSO 🦋

Kernel file ./drivers/gpu/drm/radeon/radeon_atpx_handler.c

the whole friend group:

• radeon_atpx_call(9)
• radeon_atpx_parse_functions(9)
• radeon_atpx_validate(9)
• radeon_atpx_verify_interface(9)
• radeon_atpx_set_discrete_state(9)
• radeon_atpx_switch_disp_mux(9)
• radeon_atpx_switch_i2c_mux(9)
• radeon_atpx_switch_start(9)
• radeon_atpx_switchto(9)
• radeon_atpx_power_state(9)
• radeon_atpx_pci_probe_handle(9)
• radeon_atpx_init(9)
• radeon_atpx_get_client_id(9)
• radeon_atpx_detect(9)
• radeon_register_atpx_handler(9)
• radeon_unregister_atpx_handler(9)

mwah 💋 this page comes from ./drivers/gpu/drm/radeon, dated October 2026, and it’s the radeon_atpx_switch_end(9) manual. bye bestie 🫶🌈