drm_dp_downstream_mode(9)

📦 version 7.3.1, in nixpkgs unstable

✨ NAME ✨

Okay so bestie, welcome to drm_dp_downstream_mode(9) — that's the function name and the manual name, and this is the Kernel API Manual page for it. Fr fr, it's the one that returns a mode for a downstream facing port. 💅

🦋 SYNOPSIS 🦋

Here's the signature, literally exactly as it appears — no edits, no cap:

struct drm_display_mode * drm_dp_downstream_mode (struct drm_device *dev
       , const u8 dpcd[DP_RECEIVER_CAP_SIZE] , const u8 port_cap[4] );

That second line starting with the comma? Iconic. Keep it exactly like that. 🫶

🎀 ARGUMENTS 🎀

Okay the cast of characters:

  • dev — the DRM device, main character energy.
  • dpcd — DisplayPort configuration data. Yes, that's literally the label.
  • port_cap — port capabilities, the supporting cast.

🌸 DESCRIPTION 🌸

It provides a suitable mode for downstream facing ports without EDID. That's the whole function's flex: no EDID? Still need a mode? It provides a suitable mode. Simple, slay, done. ✨

🌈 RETURN 🌈

A new drm_display_mode on success, or NULL on failure. So if it works you get a new drm_display_mode; if it doesn't, NULL says “not today.” 😭

🔗 SEE ALSO 🔗

Okay this SEE ALSO list is a whole group chat, bestie — every single reference from the original is here, no summaries, no skipping, periodt. 👑

That's the whole page, bestie! 🫶 Cute little footer info: source/version vibes are ./drivers/gpu/drm/display, date is October 2026, and the manual name is drm_dp_downstream_mode(9). 💖

📦 where this page comes from