drm_dp_read_sink_count(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_dp_read_sink_count — a Kernel API Manual moment

okay so real talk, this is a page from the Kernel API Manual, and bestie, the whole thing is literally drm_dp_read_sink_count(9) — that's the name, that's the function, we're in DisplayPort land now 💖

✨ NAME ✨

drm_dp_read_sink_count — Retrieve the sink count for a given sink 🫶

🎀 SYNOPSIS 🎀

int drm_dp_read_sink_count (struct drm_dp_aux *aux );

🌸 ARGUMENTS 🌸

  • aux — the DP AUX channel to use, no cap. This is the channel you're reading the sink count through, so like, pick the right one bestie 😌

🦋 DESCRIPTION 🦋

ngl the description here is a little shy — it just points you at another page:

See also: drm_dp_read_sink_count_cap 👀

that's it, that's the whole vibe check. go read the cap function, iykyk ✨

💜 RETURN 💜

The current sink count reported by aux, or a negative error code otherwise 💀

so like — happy path you get a number, sad path you get a negative error code. check it fr fr, don't just assume it's a count 🙈

🌈 SEE ALSO 🌈

This list is long bestie, like main character energy long, but every single one is here, no skips 👑

and that's the page bestie, we ate and left zero crumbs 💅✨

signing off from ./drivers/gpu/drm/display, dated October 2026 — literally the drm_dp_read_sink_count(9) source/version era, ok bye 🎀🦋💖

📦 where this page comes from