drm_color_lut32_check(9)

🌸 NAME 🌸

okay so this is drm_color_lut32_check(9) from the Kernel API Manual — the one and only vibe check for extended lookup tables 💅

drm_color_lut32_check — check validity of extended lookup table. That's the name + one-liner combo, bestie.

💅 SYNOPSIS 💅

Here's the signature exactly so nobody comes for me:

int drm_color_lut32_check (const struct drm_property_blob *lut , u32
       tests );

🎀 ARGUMENTS 🎀

• lut — property blob containing extended LUT to check. It's the const struct drm_property_blob * bestie — the blob holding the extended LUT you're checking.
• tests — bitmask of tests to run. A u32 bitmask; the driver uses it to say which tests from drm_color_lut_tests should be performed.

✨ DESCRIPTION ✨

Okay so this helper checks whether a userspace-provided extended lookup table is valid and satisfies hardware requirements. No cap. Drivers pass a bitmask indicating which of the tests in drm_color_lut_tests should be performed.

It returns 0 on success and -EINVAL on failure. That's it: 0 success, -EINVAL failure. periodt.

bestie please keep the blob and the bitmask honest — this is literally the validity check, not a vibe-only situation 🙈

🦋 SEE ALSO 🦋

• Kernel file ./drivers/gpu/drm/drm_color_mgmt.c — overview(9)
• drm_color_ctm_s31_32_to_qm_n(9)
• drm_crtc_enable_color_mgmt(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)

mwah 💋 cute footer-adjacent sign-off: this page's source/version is ./drivers/gpu/drm, dated October 2026, and it's part of the Kernel API Manual. now go check that LUT, bestie 🫶✨