drm_dp_tunn...b_dprx_rates(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_dp_tunnel_128b132b_dprx_rates(9) — bestie's guide to the 128b132b DPRX rates query ✨

okay so real talk, this page lives in the Kernel API Manual, and the function name is a whole mouthful — drm_dp_tunnel_128b132b_dprx_rates. say it three times fast, i dare you 🫶

🌸 NAME 🌸

drm_dp_tunnel_128b132b_dprx_rates — the little function that goes and asks: "hey, what 128b132b rates does your tunnel's DPRX actually support?" 🔍💖

🎀 SYNOPSIS 🎀

u8 drm_dp_tunnel_128b132b_dprx_rates (const struct drm_dp_tunnel *tunnel);

yep that's it, one argument, returns a u8. short and iconic 👑

🦋 ARGUMENTS 🦋

  • tunnel — the tunnel object in question ✨ like, the actual thing you're querying. const, so bestie's not getting modified, we respect her boundaries 💅

🌈 DESCRIPTION 🌈

so what this does is query the supported 128b132b rates of the DPRX connected to tunnel. basically you hand it a tunnel, it tells you which rates are a yes 🎀

⚠️ important vibe check: the related DP_128B132B_SUPPROTED_LINK_RATES DPCD register will indicate no supported 128B132B rates for a tunneled DPRX. like, that register is not your friend here, do not be fooled by it 😭 (and yes, that spelling is exactly how it appears, we don't fix it, we respect it 🫶)

and then — the moment you've been waiting for — it returns the mask of supported 128b132b rates. a whole mask, slay 💖

🔥 SEE ALSO 🔥

the source file, obviously, because we stan primary sources:

  • Kernel file ./drivers/gpu/drm/display/drm_dp_tunnel.c

and the whole tunnel friend group, fr fr, no one gets left out:

okay that's the whole page, mwah 💋 this cutie lives in ./drivers/gpu/drm/display, dated October 2026, and the page itself is filed under drm_dp_tunn...b_dprx_rates(9) — yes the title is abbreviated, it's giving mysterious main character energy 🌈✨

📦 where this page comes from