dm_test_scal...can_disabled(9)

💅 dm_test_scaling_state_underscan_disabled — Kernel API Manual, but make it cute

okay so bestie, you're reading a page out of the Kernel API Manual, and today's main character is dm_test_scaling_state_underscan_disabled(9). Say that five times fast, I dare you. 🫶

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✨ NAME ✨

dm_test_scaling_state_underscan_disabled — literally just a test that checks whether disabling underscan with borders ends up giving you a different result. That's it, that's the whole vibe check. 🔥

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🦋 SYNOPSIS 🦋

void dm_test_scaling_state_underscan_disabled (struct kunit *test );

look at her. flawless signature. no notes. 💅

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🌸 ARGUMENTS 🌸

• test — the KUnit test context, aka the little backstage pass that tells the test framework who's who. not optional, she's the whole point. 🎀

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👑 SEE ALSO 👑

okay so there's a lot of siblings in this family and I'm not about to skip any of them, so buckle up, we're listing everybody. 🧚

🍓 The kernel file (yes, the actual address)

• Kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_test.c

🌈 The rest of the squad

• 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_descending(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_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)

like I said. a whole friend group. every single one of them, present and accounted for. no cap. 💖

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bestie note: this page came out of the Kernel API Manual, and it's the October 2026 edition — the footer on the original literally says ./drivers/gpu/drm/amd/display/... October 2026, so there you go, that's the receipt. 🫶 go forth and test your underscan, you iconic little kernel dev. slay. 💅✨🎀