amdgpu_dm_verify_lut_sizes(9)

💅 amdgpu_dm_verify_lut_sizes(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's about amdgpu_dm_verify_lut_sizes, and honestly? it's giving "small function, big responsibility." let's get into it 🫶

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🌸 NAME 🌸

amdgpu_dm_verify_lut_sizes — verifies if DRM luts match the hw supported sizes 💖

like, it's literally the vibe check for your LUT sizes, no cap.

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⭐ SYNOPSIS ⭐

int amdgpu_dm_verify_lut_sizes (const struct drm_crtc_state *crtc_state
);

look at that signature. so clean. so iconic. 👑

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🎀 ARGUMENTS 🎀

• crtc_state — the DRM CRTC state 🌈 that's the one thing you're passing in, and it's const struct drm_crtc_state *, so nobody's out here mutating it on your watch, periodt.

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🦋 DESCRIPTION 🦋

So what does it actually do? It verifies that the Degamma and Gamma LUTs attached to the crtc_state are of the expected size ✨

that's it. that's the whole job. it's the bouncer at the club checking that the Degamma and Gamma LUTs are the size they're supposed to be before anything gets through 💅

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🔥 RETURN 🔥

• 0 on success 🎉 slay, everything matched.
• -EINVAL if any lut sizes are invalid 😭 not me getting rejected at the door.

fr fr, if you see -EINVAL it means at least one of those LUT sizes did not pass the vibe check. handle it accordingly, bestie.

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👑 SEE ALSO 👑

Kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c 🍓

and the whole friend group 💜:

• overview(9)
• amdgpu_dm_init_color_mod(9)
• __extract_blob_lut(9)
• __extract_blob_lut32(9)
• __is_lut_linear(9)
• __drm_lut_to_dc_gamma(9)
• __drm_lut32_to_dc_gamma(9)
• __drm_ctm_to_dc_matrix(9)
• __drm_ctm_3x4_to_dc_matrix(9)
• __set_legacy_tf(9)
• __set_output_tf(9)
• __set_output_tf_32(9)
• __set_input_tf(9)
• __set_input_tf_32(9)
• amdgpu_dm_verify_lut3d_size(9)
• amdgpu_dm_check_crtc_color_mgmt(9)
• amdgpu_dm_update_crtc_color_mgmt(9)
• amdgpu_dm_update_plane_color_mgmt(9)

like, the whole color management crew is here and they all ate 💅✨

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and that's the page, bestie 🫶 source/version is kickin' it at ./drivers/gpu/drm/amd/display/..., dated October 2026 🌸 mwah, go verify those LUT sizes, ily, bye 💖🎀🦋