drm_crtc_enable_color_mgmt(9)

💅 drm_crtc_enable_color_mgmt(9) 💅

okay so you're in the Kernel API Manual, bestie, and today's main character is drm_crtc_enable_color_mgmt — a kernel function that's literally just here to turn on the color management properties for you. no cap, that's the whole vibe. ✨

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🌸 NAME 🌸

drm_crtc_enable_color_mgmt — enable color management properties. that's it. that's the job. she enables. she manages colors. she serves. 🎀

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🦋 SYNOPSIS 🦋

void drm_crtc_enable_color_mgmt (struct drm_crtc *crtc , uint
degamma_lut_size , bool has_ctm , uint gamma_lut_size );

yes it's one long line and yes she's a void — she returns nothing because she doesn't need to, she just does things and dips. 💅

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✨ ARGUMENTS ✨

• crtc — the DRM CRTC. like, the actual CRT Controller object you're doing all this color stuff to. the canvas. the moment. 🖼️
• degamma_lut_size — the size of the degamma lut. and yes, that's the one before CSC, iykyk. 👑
• has_ctm — a bool, bestie, so it's a yes/no situation: whether to attach ctm_property for the CSC matrix. true = attached, false = she's not coming to the party. 🙈
• gamma_lut_size — the size of the gamma lut, which lives after CSC. different side of the pipeline, still iconic. 🌈

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💖 DESCRIPTION 💖

so here's the tea ☕ — this function is how the driver enables the color correction properties on a CRTC. and when she enables, she enables five properties, no cap:

• the 3 big ones userspace can actually set: degamma, csc, and gamma
• plus 2 size properties whose whole job is to inform userspace of the lut sizes 🫶

and the best part? each of the properties are optional. very "come as you are" of her. the rules are:

• gamma and degamma properties are only attached if their size is not 0
• ctm_property is only attached if has_ctm is true

🚨 vibe check: size 0 means no property, and has_ctm = false means no ctm property. she's not attaching things she wasn't asked to attach. periodt. 💀

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🔥 SEE ALSO 🔥

the whole friend group, fr fr — go read the kernel file ./drivers/gpu/drm/drm_color_mgmt.c plus all these lovelies:

• overview(9)
• drm_color_ctm_s31_32_to_qm_n(9)
• drm_mode_crtc_set_gamma_size(9)
• drm_crtc_supports_legacy_gamma(9)
• drm_crtc_legacy_gamma_set(9)
• drm_mode_gamma_set_ioctl(9)
• drm_mode_gamma_get_ioctl(9)
• drm_get_color_encoding_name(9)
• drm_get_color_range_name(9)
• drm_plane_create_color_properties(9)
• drm_color_lut_check(9)
• drm_crtc_load_gamma_888(9)
• drm_crtc_load_gamma_565_from_888(9)
• drm_crtc_load_gamma_555_from_888(9)
• drm_crtc_fill_gamma_888(9)
• drm_crtc_fill_gamma_565(9)
• drm_crtc_fill_gamma_555(9)
• drm_crtc_load_palette_8(9)
• drm_crtc_fill_palette_332(9)
• drm_crtc_fill_palette_8(9)
• drm_color_lut32_check(9)

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🧚 okay that's the whole page!! this one came out of ./drivers/gpu/drm and it's dated October 2026 — stay hydrated, enable your color management, and slay your pipeline bestie 🍓💜