radeon_atpx_switch_disp_mux(9)

📦 version 7.3.1, in nixpkgs unstable

💅 radeon_atpx_switch_disp_mux(9) — like, the Kernel API Manual page bestie 🎀

okay so this is radeon_atpx_switch_disp_mux from the Kernel API Manual, and no cap, it's a whole mood. it's a tiny function with one job and it does that job. let's get into it ✨

🌸 NAME 🌸

radeon_atpx_switch_disp_mux — switch display mux

yes bestie, that's literally it. it switches the display mux. main character behavior honestly 👑

🦋 SYNOPSIS 🦋

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

so she takes an atpx and a mux_id, and gives you back an int. simple. elegant. iconic. 💅

🍓 ARGUMENTS 🍓

  • atpx — the atpx info struct 🫶 like, the whole context bundle, she needs it to do her thing
  • mux_id — the mux state, and this is the important bit: 0 = integrated GPU, 1 = discrete GPU. that's the whole vibe check right there, don't mix 'em up 😭

🔥 DESCRIPTION 🔥

okay so what she actually does: she executes the ATPX_FUNCTION_DISPLAY_MUX_CONTROL ATPX function to switch the display mux between the discrete GPU and the integrated GPU, and this works on all asics — yes, all of them, no gatekeeping 💜

returns 0 on success, error on failure. that's the contract, periodt. ⭐

ngl, if you get a nonzero back, that's your sign something went sideways — she tried, bestie 💀

🌈 SEE ALSO 🌈

the whole friend group, fr fr — she does not exist in a vacuum:

like, literally the entire crew. go read them too, iykyk 📚✨

and that's the page!! 🧚 source vibe: ./drivers/gpu/drm/radeon, dated October 2026 — mwah, no notes, thanks for coming to my ted talk bestie 💖🎀🦋

📦 where this page comes from