dpp401_dscl_set_recout(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dpp401_dscl_set_recout — the Kernel API Manual, section 9, bestie

okay so we're in the <pink>9</pink> section of the Kernel API Manual today and the star of the show is dpp401_dscl_set_recout — literally the function whose whole job is setting the first pixel of RECOUT in the OTG active area. iconic behavior, no cap 🎀

✨ SYNOPSIS ✨

void dpp401_dscl_set_recout (struct dcn401_dpp *dpp , const struct rect
*recout );

that's it. that's the whole signature. two args, returns nothing, gets straight to business 💅

🫶 ARGUMENTS 🫶

  • dpp — the DPP data struct, aka the little guy holding all the state 🦋
  • recout — rectangle information. it's a const struct rect *, so we're looking at it, not touching it, periodt ✨

🌸 DESCRIPTION 🌸

so what does it actually do? it sets the MPC RECOUT_START and RECOUT_SIZE registers based on the values you specified in the recount parameter. (and yes bestie, it's spelled recount in the original — I don't make the rules, I just relay them 🙈)

registers get written, the rectangle gets described, everyone goes home happy. the way that this function just... does its one thing 💖

💀 NOTE 💀

this function only has effect if AutoCal is disabled. if AutoCal is on, congrats, you've written to the void. lowkey tragic but fr fr that's the deal 🔥

👑 SEE ALSO 👑

Kernel file, right here in all its glory:

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

and the whole friend group:

go read them, they're all slaying in their own way 🌈

shoutout to ./drivers/gpu/drm/amd/display/... for hosting this whole situation, and to October 2026 for the timestamp — this page is a lil time capsule and I'm obsessed 🕰️✨ mwah, bye bestie 💜

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