dm_test_veri...alid_degamma(9)
π NAME
dm_test_veri...alid_degamma β bestie, this is the KUnit test for a degamma LUT with a wrong size, and the whole vibe is: it must return -EINVAL. Like, that's the assignment, no notes. β¨
(This page lives in the Kernel API Manual, so you already know it's kernel business π§)
π SYNOPSIS
void dm_test_verify_lut_sizes_invalid_degamma (struct kunit *test );
π¦ ARGUMENTS
testβ the KUnit test context. It's giving "the little context object the whole test hangs off of" energy, iykyk π«Ά
πΈ SEE ALSO
First up, the actual kernel file this whole situation lives in β go read it, it's iconic:
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_color_test.c
And now the entire friend group (yes, all of them, I'm not skipping a single one π):
dm_test_make_lut_blob(9)dm_test_verify_lut_sizes_null_luts(9)dm_test_verify_lut_sizes_valid_degamma(9)dm_test_verify_lut_sizes_valid_gamma_atomic(9)dm_test_verify_lut_sizes_valid_gamma_legacy(9)dm_test_verify_lut_sizes_invalid_gamma(9)dm_test_verify_lut_sizes_both_valid(9)dm_test_verify_lut_sizes_invalid_degamma_valid_gamma(9)dm_test_atomic_lut3d_zero_size(9)dm_test_atomic_lut3d_nonzero_state_bits(9)dm_test_atomic_lut3d_data_forwarded(9)dm_test_set_colorop_3dlut_zero_size(9)dm_test_set_colorop_3dlut_nonzero_state_bits(9)dm_test_set_colorop_3dlut_data_forwarded(9)dm_test_set_tf_bypass(9)dm_test_set_tf_distributed_points_srgb(9)dm_test_set_tf_distributed_points_pq(9)dm_test_set_legacy_tf_identity(9)dm_test_set_output_tf_linear(9)dm_test_set_output_tf_32_srgb_rom(9)dm_test_set_input_tf_srgb(9)dm_test_set_input_tf_32_srgb(9)dm_test_set_transfer_funcs_with_luts(9)dm_test_set_atomic_regamma_bypass(9)dm_test_set_atomic_regamma_srgb(9)dm_test_atomic_shaper_lut_bypass(9)dm_test_atomic_blend_lut_bypass(9)dm_test_atomic_shaper_blend_srgb(9)dm_test_set_colorop_in_tf_1d_curve_invalid_type(9)dm_test_set_colorop_in_tf_1d_curve_unsupported_curve(9)dm_test_set_colorop_in_tf_1d_curve_bypass(9)dm_test_init_color_mod(9)dm_test_verify_lut3d_alloc_plane(9)dm_test_verify_lut3d_alloc_adev(9)dm_test_verify_lut3d_no_luts(9)dm_test_verify_lut3d_bad_shaper(9)dm_test_verify_lut3d_bad_lut3d(9)dm_test_verify_lut3d_valid(9)struct dm_test_colorop_fixture(9)dm_test_colorop_setup(9)dm_test_colorop_multiplier_applied(9)dm_test_colorop_multiplier_no_match(9)dm_test_colorop_3x4_matrix_applied(9)dm_test_colorop_3x4_matrix_bad_length(9)dm_test_colorop_degamma_predefined(9)dm_test_colorop_degamma_no_match(9)struct dm_test_color_update_fixture(9)dm_test_color_update_setup(9)dm_test_make_ctm_blob(9)dm_test_check_crtc_color_mgmt_no_luts(9)dm_test_check_crtc_color_mgmt_legacy_regamma(9)dm_test_check_crtc_color_mgmt_degamma(9)dm_test_update_crtc_color_mgmt_no_ctm(9)dm_test_update_crtc_color_mgmt_ctm(9)dm_test_update_plane_color_mgmt_bad_lut3d(9)dm_test_update_plane_color_mgmt_fallback_defaults(9)dm_test_update_plane_color_mgmt_maps_crtc_degamma(9)dm_test_update_plane_color_mgmt_maps_crtc_degamma_lut(9)dm_test_update_plane_color_mgmt_maps_bt709_degamma(9)dm_test_update_plane_color_mgmt_plane_degamma_lut(9)dm_test_update_plane_color_mgmt_rejects_dual_degamma(9)dm_test_update_plane_color_mgmt_uses_color_caps(9)dm_test_update_plane_color_mgmt_legacy_luts(9)dm_test_update_plane_color_mgmt_plane_ctm(9)dm_test_colorop_pipeline_add(9)dm_test_colorop_pipeline_setup(9)dm_test_update_plane_color_mgmt_colorop_bypass_pipeline(9)dm_test_update_plane_color_mgmt_colorop_missing_multiplier(9)dm_test_update_plane_color_mgmt_colorop_missing_3x4(9)dm_test_update_plane_color_mgmt_colorop_truncated(9)dm_test_update_plane_color_mgmt_colorop_no_3dlut_hw(9)dm_test_update_plane_color_mgmt_colorop_shaper(9)dm_test_update_plane_color_mgmt_colorop_3dlut(9)dm_test_update_plane_color_mgmt_colorop_3dlut_no_data(9)dm_test_update_plane_color_mgmt_colorop_blend(9)
π That's the whole roster, no cap β read them all or don't, but they're all right there.
β¨ and that's the page, babe β¨ this little number came straight out of ./drivers/gpu/drm/amd/display/... and it's dated October 2026 β go forth and validate those LUT sizes π
π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms