drm_dp_mst_...ed_dsc_crtcs(9)

📦 version 7.3.1, in nixpkgs unstable

✨ drm_dp_mst_add_affected_dsc_crtcs — Kernel API Manual ✨

okay bestie, buckle up, we're diving into drm_dp_mst_add_affected_dsc_crtcs from the Kernel API Manual 💅 this one's a whole vibe and honestly? kinda iconic.

🌸 NAME 🌸

drm_dp_mst_add_affected_dsc_crtcs — no cap, that's the whole name section, the original literally didn't give us a one-liner here, so we're not gonna invent one 🫶

🦋 SYNOPSIS 🦋

int drm_dp_mst_add_affected_dsc_crtcs (struct drm_atomic_commit *state ,
struct drm_dp_mst_topology_mgr *mgr );

that's the whole signature, bestie — returns an int, takes two args. slay ✨

🎀 ARGUMENTS 🎀

  • state — a pointer to the new struct drm_dp_mst_topology_state 👑 like, the fresh topology state we're working with.
  • mgr — the MST topology manager. the main character of this whole operation, fr fr.

💖 DESCRIPTION 💖

so here's the tea 🍓: whenever there's any change in the MST topology, the DSC configuration has to get recalculated. literally every time. so because of that, we need to trigger a modeset on all the affected CRTCs in that topology — every single one of them, no skipping 🙈.

ngl this is the whole reason the function exists: topology shift → DSC recalc → modeset on all affected CRTCs. periodt.

See also: drm_dp_mst_atomic_enable_dsc 👀

🌈 SEE ALSO 🌈

okay this list is long and we are NOT cutting it, bestie — every single one of these is staying:

like, that's the whole friend group right there 😭💜

and that's the page, bestie!! 🎀 this little gem lives over in the source dir ./drivers/gpu/drm/display, and it's dated October 2026 — so mark your calendars, iykyk 🦋✨ slay, go read some kernel code, and remember: topology changes mean DSC recalc, and DSC recalc means modesets on all the affected CRTCs. periodt 💅

📦 where this page comes from