drm_bridge_chain_mode_valid(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_bridge_chain_mode_valid(9) — the kernel API manual, but make it make sense 🎀

okay so bestie, welcome to the drm_bridge_chain_mode_valid(9) page from the Kernel API Manual ✨ this is the one that does the whole "is this display mode actually valid across, like, every bridge" vibe check. stay with me, it's genuinely so good 🫶

✨ NAME ✨

drm_bridge_chain_mode_valid — the girl who validates your mode against all the bridges in the encoder chain. all of them. no skipping 💅

🌸 SYNOPSIS 🌸

enum drm_mode_status drm_bridge_chain_mode_valid (struct drm_bridge
*first_bridge , const struct drm_display_info *info , const struct
drm_display_mode *mode );

like, look at her. three args. so clean. 🦋

🎀 ARGUMENTS 🎀

  • first_bridge — the bridge control structure. this is your starting point, your main character, the one you pass in 👑
  • info — the display info that the mode is gonna be validated against. it's the reference sheet, basically 📋
  • mode — the desired mode. the one we're validating. the vibe we're checking ✨

💖 DESCRIPTION 💖

so here's the tea: this function calls drm_bridge_funcs.mode_valid for all the bridges in the encoder chain — and it goes in order, starting from first_bridge all the way to the last one. first to last, no cap 🚶‍♀️➡️🚶‍♀️

and if even one bridge is like "nope, not accepting this mode"? the function returns the error code. one hater and the whole thing's cooked 😭 literally that's it.

⚠️ NOTE ⚠️

okay important, don't skip this one bestie 🙈 — the bridge you pass in should be the one closest to the encoder. that's the whole bit. iykyk.

⭐ RETURN ⭐

  • MODE_OK on success 💚 slay
  • drm_mode_status Enum error code on failure 💀

🦋 SEE ALSO 🦋

everything's connected, it's giving ecosystem 🌈 and yes we're listing all of it, i don't do half-measure:

and that's the page!! 💜 this one lives over in ./drivers/gpu/drm, and the version/date on the tin is October 2026 — shoutout to drm_bridge_chain_mode_valid(9) for being the moment. periodt. 🎀✨

📦 where this page comes from