drm_dp_tunnel_max_dprx_rate(9)

📦 version 7.3.1, in nixpkgs unstable

💖 drm_dp_tunnel_max_dprx_rate(9) 💖

okay bestie, welcome to the drm_dp_tunnel_max_dprx_rate(9) page — it's a Kernel API Manual moment, and honestly this one is short and sweet. Let's get into it ✨

🌸 NAME 🌸

drm_dp_tunnel_max_dprx_rate — literally just "query the maximum rate of the tunnel's DPRX". that's the whole vibe check 🎀

🦋 SYNOPSIS 🦋

int drm_dp_tunnel_max_dprx_rate (const struct drm_dp_tunnel *tunnel );

💅 ARGUMENTS 💅

  • tunnel — the tunnel object. yes, that's it. one (1) argument. she's low maintenance 👑

🔥 DESCRIPTION 🔥

so the way this works: you call this function when you wanna query the maximum link rate of the DPRX connected to tunnel. simple enough, right?

but here's the ✨ key detail ✨ — and ngl this is the part you cannot miss — this rate will not be limited by the BW limit of the tunnel. and that's as opposed to the standard and extended DP_MAX_LINK_RATE DPCD registers. so like, don't go assuming this number matches what those registers would tell you, because it does not, and that's the whole point 🫶

it returns the maximum link rate in 10 kbit/s units. units matter bestie, don't forget the 10 kbit/s 💖

💜 SEE ALSO 💜

kernel file ./drivers/gpu/drm/display/drm_dp_tunnel.c — go read the source, iykyk 📖

okay that's the whole page, you ate that 💅 quick little sign-off: this one lives in ./drivers/gpu/drm/display, dated October 2026, and it's part of the Kernel API Manual. slay, go query some DPRX rates 🌈⭐💖

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