amdgpu_dm_verify_lut3d_size(9)

💅 amdgpu_dm_verify_lut3d_size(9)

okay so this is a page from the Kernel API Manual, and it's about one very specific little function that does a vibe check on your 3D LUT setup 🎀

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✨ NAME ✨

amdgpu_dm_verify_lut3d_size — bestie, this one verifies if 3D LUT is supported and if user shaper and 3D LUTs match the hw supported size 💖

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🌸 SYNOPSIS 🌸

int amdgpu_dm_verify_lut3d_size (struct amdgpu_device *adev , struct
drm_plane_state *plane_state );

like, it takes two things and gives you back an int, that's the whole deal 🫶

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🦋 ARGUMENTS 🦋

• adev — the amdgpu device, the main character here 👑
• plane_state — the DRM plane state, aka the other one you gotta hand over

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💜 DESCRIPTION 💜

So what does it actually do? It verifies if pre-blending (DPP) 3D LUT is supported by the HW (DCN 2.0 or newer) — and it also verifies if the user shaper and 3D LUTs match the supported size. Both checks, one function, she's efficient like that ✨

no cap, if your hardware is pre-DCN 2.0, the 3D LUT support just isn't there — this is the function that finds that out 🙈

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⭐ RETURN ⭐

• 0 on success 🎉
• -EINVAL if lut size are invalid 💀 (yep, that's the exact wording, I'm not touching it)

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🌈 SEE ALSO 🌈

The kernel file this lives in:

./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c

and literally all of her friends, in order, no skipping 👑:

• 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_lut_sizes(9)
• amdgpu_dm_check_crtc_color_mgmt(9)
• amdgpu_dm_update_crtc_color_mgmt(9)
• amdgpu_dm_update_plane_color_mgmt(9)

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okay that's the whole page, mwah 💋 this one's sourced from ./drivers/gpu/drm/amd/display/... and dated October 2026 — amdgpu_dm_verify_lut3d_size(9), periodt. 🧚‍♀️💅