drm_dp_dpcd_..._link_status(9)

📦 version 7.3.1, in nixpkgs unstable

ok so this is drm_dp_dpcd_read_link_status from the Kernel API Manual (section 9, yes bestie, the function page 💖) and it literally just reads the DPCD link status, aka bytes 0x202-0x207. that's the whole vibe. 🦋

🌸 SYNOPSIS 🌸

int drm_dp_dpcd_read_link_status (struct drm_dp_aux *aux , u8
       status[DP_LINK_STATUS_SIZE] );

look at her. iconic signature. no notes. 👑

🎀 ARGUMENTS 🎀

  • aux — the DisplayPort AUX channel. that's your lane to talk to the sink, she's the main character of this call 💅
  • status — the buffer where the link status gets stored. and listen, it must be at least 6 bytes — that's not a suggestion, that's the rule, DP_LINK_STATUS_SIZE is not playing around 🙈

⭐ DESCRIPTION ⭐

so you call this, and it returns a negative error code on failure, or 0 on success. that's it. that's the whole function. tiny, efficient, ate. ✨

like fr fr, that one line is the entire documented behaviour — no hidden lore, no secret bonus features. if it worked you get 0, and if it didn't you get a negative error code and you should go be sad about it for a sec 😭

🦋 SEE ALSO 🦋

okay so the see-also section is HUGE, my girl has connections, she's networked. also there's a kernel file mentioned first: ./drivers/gpu/drm/display/drm_dp_helper.c — that's where she lives 💖

like… that's the whole extended friend group. she knows EVERYONE at the DP party 🫶

and that's the page bestie!! 💖✨ source path is ./drivers/gpu/drm/display, dated October 2026, and she's drm_dp_dpcd_..._link_status(9) all the way down. periodt. 💅🎀

📦 where this page comes from