dm_test_plan...p_descending(9)

💅 dm_test_plane_layer_index_cmp_descending — Kernel API Manual

okay so bestie, welcome to the manual page for dm_test_plane_layer_index_cmp_descending(9), straight out of the Kernel API Manual. Yes the title is a whole mouthful, yes the ... in the middle is doing main character energy, and yes we're gonna get through it together 🫶

✨ NAME ✨

dm_test_plane_layer_index_cmp_descending — literally a test for the plane layer index comparison, descending edition 🔥

🌸 SYNOPSIS 🌸

void dm_test_plane_layer_index_cmp_descending (struct kunit *test );

🎀 ARGUMENTS 🎀

• test — the KUnit test context 💖 that's it, that's the whole argument, she's lowkey simple like that

🦋 SEE ALSO 🦋

first up, the kernel file where all this lives — no cap, go look at it:

./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_test.c

and now the full friend group 😭 (yes I'm listing every single one, we don't skip anyone in this house):

• dm_test_is_idle(9)
• dm_test_wait_for_idle(9)
• dm_test_soft_reset(9)
• dm_test_set_clockgating_state(9)
• dm_test_set_powergating_state(9)
• dm_test_bandwidth_update(9)
• dm_test_crtc_complete_writeback_no_connector(9)
• dm_test_crtc_complete_writeback_not_pending(9)
• dm_test_vblank_get_counter_out_of_range(9)
• dm_test_vblank_get_counter_no_stream(9)
• dm_test_crtc_get_scanoutpos_invalid_crtc(9)
• dm_test_crtc_get_scanoutpos_no_stream(9)
• dm_test_atomic_get_new_state_empty(9)
• dm_test_atomic_get_new_state_match(9)
• dm_test_atomic_destroy_state_no_context(9)
• dm_test_plane_layer_index_cmp_equal(9)
• dm_test_plane_layer_index_cmp_ascending(9)
• dm_test_fill_color_attr_rgb_format(9)
• dm_test_fill_color_attr_bt601_full(9)
• dm_test_fill_color_attr_bt601_limited(9)
• dm_test_fill_color_attr_bt709_full(9)
• dm_test_fill_color_attr_bt709_limited(9)
• dm_test_fill_color_attr_bt2020_full(9)
• dm_test_fill_color_attr_bt2020_limited(9)
• dm_test_fill_color_attr_invalid_encoding(9)
• dm_test_modereset_required_when_inactive_and_modeset(9)
• dm_test_modereset_not_required_when_active_and_modeset(9)
• dm_test_modereset_not_required_when_inactive_without_modeset(9)
• dm_test_scaling_state_same(9)
• dm_test_scaling_state_scaling_changed(9)
• dm_test_scaling_state_underscan_enabled(9)
• dm_test_scaling_state_underscan_disabled(9)
• dm_test_scaling_state_underscan_border_changed(9)
• dm_test_multisync_trigger_disabled(9)
• dm_test_multisync_trigger_rising(9)
• dm_test_multisync_trigger_falling(9)
• dm_test_master_stream_highest_refresh(9)
• dm_test_master_stream_defaults_to_first(9)
• dm_test_cp_diff_hdcp_type_change(9)
• dm_test_cp_diff_reenable_mode_changed(9)
• dm_test_cp_diff_reenable_no_change(9)
• dm_test_cp_diff_undesired(9)
• dm_test_cp_diff_desired_mode_changed(9)
• dm_test_cp_diff_desired_no_change(9)
• dm_test_cp_diff_update_hdcp_hotplug(9)
• dm_test_cp_diff_stream_reenabled(9)
• dm_test_cp_diff_s3_undesired_to_enabled(9)
• dm_test_cp_diff_desired_to_enabled(9)
• dm_test_cp_diff_desired_to_undesired(9)
• dm_test_per_frame_master_sync_single_stream(9)
• dm_test_per_frame_master_sync_two_streams(9)
• dm_test_per_frame_master_sync_skips_null_stream(9)
• dm_test_apply_delay_null_sink(9)
• dm_test_apply_delay_zero_wait(9)
• dm_test_apply_delay_nonzero_wait(9)

ngl bestie, that's a lot of tests — but they're all right there in the list, so you're never lost 💀✨

and that's the whole page! sign-off time: this one comes from the source <lavender>./drivers/gpu/drm/amd/display/...</lavender>, dated October 2026, and it's the dm_test_plan...p_descending(9) page you just read 💜 bye bestie, go write some tests 🧚‍♀️🌸