drm_dp_mst_a...c_enable_dsc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_dp_mst_atomic_enable_dsc(9) 💅

okay so this is from the Kernel API Manual bestie, and it's genuinely one of those little functions that does exactly what the name says — no lore, no plot twist. It's drm_dp_mst_atomic_enable_dsc, and it flips the DSC switch on a port. On or off. That's the whole vibe. ✨

🌸 NAME 🌸

drm_dp_mst_atomic_enable_dsc — Set DSC Enable Flag to On/Off 🎀

🦋 SYNOPSIS 🦋

int drm_dp_mst_atomic_enable_dsc (struct drm_atomic_commit *state ,
struct drm_dp_mst_port *port , int pbn , bool enable );

💖 ARGUMENTS 💖

  • state — Pointer to the new drm_atomic_commit. like, the fresh commit bestie, the one you're building rn 💅
  • port — Pointer to the affected MST Port. this is the port in question, the main character of the operation 👑
  • pbn — Newly recalculated bw required for link with DSC enabled. yes it's the newly recalculated bandwidth, don't just pass vibes, pass the actual number 😭
  • enable — Boolean flag to enable or disable DSC on the port. true = on, false = off, no in-between, no situationships 🫶

⭐ DESCRIPTION ⭐

so what this does: it enables DSC on the given Port by recalculating its vcpi from the pbn you provided, and then it sets the dsc_enable flag to keep track of which ports have DSC enabled. 🧚

like literally that's it. recalc the vcpi from pbn, flip the bookkeeping flag, know which ports are DSC-girlies and which aren't. lowkey iconic how tidy it is. 🍓

reminder bestie: the pbn is the newly recalculated bandwidth for the link with DSC enabled — so it's on you to have done that math before you call this. no cap. 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/display/drm_dp_mst_topology.c, plus the whole friend group:

that's the whole page bestie, go read the source if you want more lore 💜

🎀 sign-off time: this one lives in ./drivers/gpu/drm/display, dated October 2026, and it's filed under drm_dp_mst_a...c_enable_dsc(9) — mwah, slay, periodt ✨💅
📦 where this page comes from