drm_crtc_legacy_gamma_set(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_crtc_legacy_gamma_set(9) 💅

okay so bestie, welcome to another page of the Kernel API Manual — this one's all about drm_crtc_legacy_gamma_set, and honestly it's giving "vintage but still relevant" ✨

🌸 NAME 🌸

drm_crtc_legacy_gamma_set — set the legacy gamma correction table 🎨

⭐ SYNOPSIS ⭐

int drm_crtc_legacy_gamma_set (struct drm_crtc *crtc , u16 *red , u16
*green , u16 *blue , u32 size , struct drm_modeset_acquire_ctx *ctx );

like, that's the whole vibe check right there 👑

🎀 ARGUMENTS 🎀

  • crtc — the CRTC object 💖 (the main character of this function, fr)
  • red — the red correction table 🍓
  • green — the green correction table 🧚
  • blue — the blue correction table 🦋
  • size — size of the tables, no cap
  • ctx — the lock acquire context 🔒

🦋 DESCRIPTION 🦋

So what does this actually do? It implements support for the legacy gamma correction table for drivers that have set drm_crtc_funcs.gamma_set — or that support color management through the DEGAMMA_LUT/GAMMA_LUT properties 👑 like, both paths are valid, slay.

If you wanna know how atomic color management and gamma tables work in general, check out drm_crtc_enable_color_mgmt and the containing chapter — it's required reading, iykyk 📚

And here's the actual tea: this function sets the gamma using drm_crtc_funcs.gamma_set if set, or alternatively using the crtc color management properties. Two routes, one destination, iconic behavior fr fr 💅

🌈 SEE ALSO 🌈

the whole friend group showed up for this one, so let's give them all a shoutout 🫶

and that's the whole page, bestie — go set some gamma tables, you've got this 💜

okay bye ily, this one came from ./drivers/gpu/drm and it's dated October 2026, and yeah the page name is literally drm_crtc_legacy_gamma_set(9) — iconic from start to finish, periodt 🎀✨

📦 where this page comes from