dm_test_veri...nvalid_gamma(9)
π dm_test_veri...nvalid_gamma(9) β Kernel API Manual
okay bestie, so you know the manual name dm_test_veri...nvalid_gamma(9)? yeah. that one. it got truncated in the title bar and honestly it's living its best abbreviated life. let's get into it β¨
πΈ NAME
dm_test_verify_lut_sizes_invalid_gamma β the size is neither atomic nor legacy, and therefore it must return -EINVAL. no notes, that's the whole vibe, the test is checking that the kernel politely says "nope" π
ββοΈ
π SYNOPSIS
void dm_test_verify_lut_sizes_invalid_gamma (struct kunit *test );
that's it. that's the whole signature. she's a void, she takes one thing, she returns nothing, she slays π
π¦ ARGUMENTS
testβ the KUnit test context, aka the little β¨situationshipβ¨ struct that carries all the test-y state around. she's the main character of the function, fr fr.
π₯ SEE ALSO
and now, bestieβ¦ brace yourself π because this list is long. like, "she has a lot of friends" long. iconic behavior honestly π
the actual kernel file, go look at it:
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_color_test.c
the whole friend group, in order, no cap (75 of them, don't @ me):
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_invalid_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_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 like I said. a lot of friends. go read them all, iykyk.
π«Ά reminder bestie: this one's name is literally invalid_gamma. the whole point is the size is neither atomic nor legacy and it must return -EINVAL. that's not a bug, that's the entire assignment. periodt. π
and that's the page!! π source path was ./drivers/gpu/drm/amd/display/... (yes it's abbreviated, she's mysterious like that π), version date October 2026, and the manual is dm_test_veri...nvalid_gamma(9) β until next time, mwah πππ¦
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