dpp401_dscl_disable_easf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dpp401_dscl_disable_easf — the "no scaling, no EASF" bestie

okay so real talk, this is a page from the Kernel API Manual (section 9, kernel devs only, no random users allowed 🎀) and it's about one very specific little function in the AMD display driver. her whole personality is turning a thing off. iconic behaviour honestly.

✨ NAME ✨

dpp401_dscl_disable_easf — literally what it says on the tin: Disable EASF when there's no scaling (1:1) 🫶

🌸 SYNOPSIS 🌸

void dpp401_dscl_disable_easf (struct dpp *dpp_base , const struct
scaler_data *scl_data );

she returns void, she takes two pointers, she does not miss. periodt. 💅

🦋 ARGUMENTS 🦋

  • dpp_base — the high level DPP struct, i.e. your main character of a display pipe object 👑
  • scl_data — the scaler_data info (the original page spells it scalaer_data, which, mood, but it's scaler_data and she's carrying the scaler details) 🌈

💖 DESCRIPTION 💖

okay so here's the vibe check: when we're doing 1:1 scaling — meaning no scaling at all, pixel-for-pixel, nothing stretched, nothing squished — we need to disable EASF. that's it. that's the function. no cap, that's the entire job 🎀

think of it as the "we're literally not scaling anything, so turn the fancy enhancement stuff off" button. she's not doing math, she's doing cleanup. and honestly? slay. ✨

🔥 SEE ALSO 🔥

start with the Kernel file, bestie, that's where the truth lives:

./drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c

and then the whole bestie squad that hangs out with her (all of these are section 9, obviously):

ngl if you're here you probably want dpp401_dscl_program_easf(9) too — the disable half of the equation is only half the story 😭

and that's the whole page, you ate it up 💜 mwah 💋 — this little gem comes out of ./drivers/gpu/drm/amd/display/... and the version stamp says October 2026, in the Kernel API Manual, filed under dpp401_dscl_disable_easf(9). go forth and disable responsibly 🧚‍♀️⭐

📦 where this page comes from