__extract_blob_lut32(9)

💜 __extract_blob_lut32(9) — like, the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to the __extract_blob_lut32 lore. This is a section 9 page from the Kernel API Manual, and it does exactly one (1) thing, but it does it iconically. Let's get into it 🫶

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✨ NAME ✨

__extract_blob_lut32 — pulls the DRM lut and the lut size out of a blob. that's it, that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

const struct drm_color_lut32 * __extract_blob_lut32 (const struct
drm_property_blob *blob , uint32_t *size );

so the function signature is literally right there, no cap. it takes a blob and a size, and it hands you back a const struct drm_color_lut32 *. 🦋

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🎀 ARGUMENTS 🎀

• blob — the DRM color mgmt property blob. yes, that's its whole personality. it's giving "i contain a blob" energy. 🍓
• size — the lut size. this is where the size lives, bestie. 🧚

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⭐ RETURN ⭐

Either the DRM LUT or NULL. those are the two options. it's a whole binary moment and honestly? we respect it. 😭

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🔥 SEE ALSO 🔥

okay this is the part where the man page goes full main character and name-drops the entire friend group. every single one of these, no skipping:

• the Kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c — that's where the whole squad lives, iykyk
• overview(9)
• amdgpu_dm_init_color_mod(9)
• __extract_blob_lut(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_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)

like, that's the whole group chat right there. go read them if you want the full story 💖

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🦋 a lil sign-off 🦋

this page came from ./drivers/gpu/drm/amd/display/... and it's dated October 2026, and it's filed under __extract_blob_lut32(9) in case you were wondering. periodt. 💅✨🌈

slay, go extract that blob bestie 💜🎀🔥