dm_test_pla..._known_video(9)

💅 dm_test_pla..._known_video(9)

okay so bestie, welcome to the Kernel API Manual, section 9 — yes the whole page is about one single KUnit test and honestly? she's kind of a legend. the function name is a whole mouthful (dm_test_plane_is_video_format_known_video) so we abbreviate it in the header like dm_test_pla..._known_video(9). iykyk. 🎀

---

✨ NAME ✨

dm_test_plane_is_video_format_known_video — literally just verifying that known video formats are… known. that's the whole gig. 💖

---

🦋 SYNOPSIS 🦋

void dm_test_plane_is_video_format_known_video (struct kunit *test );

---

🌸 ARGUMENTS 🌸

• test — the KUnit test context, aka the little backpack this test carries around with it. give her what she needs and she's golden. 🫶

---

👑 DESCRIPTION 👑

ok so the vibe check here is simple: this test verifies whether NV12, NV21, and P010 are treated as video formats. that's it. three formats, one job, and she does it. no cap. 🔥

---

💀 SEE ALSO 💀

Kernel file

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

and now, the extended friend group — every single one of these (9) pages, in the order the manpage gave them, no skips, no cuts, no "we'll just link a few" energy. periodt. ✨

blending besties 🎀

• dm_test_fill_blending_defaults(9)
• dm_test_fill_blending_premulti_alpha_format(9)
• dm_test_fill_blending_coverage_alpha_format(9)
• dm_test_fill_blending_global_alpha(9)

modifier main characters 🦋

• dm_test_modifier_has_dcc(9)
• dm_test_modifier_gfx9_swizzle_mode(9)

formats & plane formats 💅

• dm_test_get_plane_formats(9)
• dm_test_get_plane_modifiers(9)
• dm_test_format_mod_supported(9)
• dm_test_get_format_info(9)
• dm_test_get_plane_formats_overlay_universal_cap(9)

scaling & cursor energy 🌈

• dm_test_fill_dc_scaling_info(9)
• dm_test_get_min_max_dc_plane_scaling(9)
• dm_test_get_cursor_position(9)

plane attributes from modifiers 🧚

• dm_test_fill_gfx12_plane_attributes_from_modifiers(9)
• dm_test_fill_gfx9_plane_attributes_from_modifiers(9)

DCC validation arc 😭

• dm_test_validate_dcc_disabled_returns_success(9)
• dm_test_validate_dcc_video_non_gfx12_fails(9)
• dm_test_validate_dcc_missing_cap_func_fails(9)
• dm_test_validate_dcc_cap_callback_fails(9)
• dm_test_validate_dcc_not_capable_fails(9)
• dm_test_validate_dcc_success_and_scan_mapping(9)
• dm_test_validate_dcc_independent_64b_mismatch_fails(9)

helper check-state gang 🍓

• dm_test_helper_check_state_viewport_reject(9)
• dm_test_helper_check_state_small_viewport_width(9)
• dm_test_helper_check_state_small_viewport_height(9)
• dm_test_helper_check_state_bottom_clipped_height(9)
• dm_test_helper_check_state_scaling_caps(9)

add_modifier crew ⭐

• dm_test_add_modifier_appends_value(9)
• dm_test_add_modifier_grows_capacity(9)
• dm_test_add_modifier_noop_when_mods_null(9)

gfx9 tiling info squad 💜

• dm_test_fill_gfx9_tiling_info_from_device_pre_10_3(9)
• dm_test_fill_gfx9_tiling_info_from_device_10_3_plus(9)
• dm_test_fill_gfx9_tiling_info_from_modifier_linear(9)
• dm_test_fill_gfx9_tiling_info_from_modifier_pre_nv(9)
• dm_test_fill_gfx9_tiling_info_from_modifier_nv(9)

blending global alpha, the dcn42 remix 🔥

• dm_test_fill_blending_global_alpha_dcn42(9)

plane modifiers, one per generation (she collected them all) 👑

• dm_test_get_plane_modifiers_gfx9(9)
• dm_test_get_plane_modifiers_rv(9)
• dm_test_get_plane_modifiers_rv_constant_encode(9)
• dm_test_get_plane_modifiers_gfx10_1(9)
• dm_test_get_plane_modifiers_gfx10_3(9)
• dm_test_get_plane_modifiers_gfx11_64k_first(9)
• dm_test_get_plane_modifiers_gfx11_256k_first(9)
• dm_test_get_plane_modifiers_gfx12(9)

gfx9 plane attributes deep dive 💀

• dm_test_fill_gfx9_plane_attributes_dcc(9)
• dm_test_fill_gfx9_plane_attributes_validate_fails(9)
• dm_test_fill_gfx9_plane_attributes_dcc_rbplus_64b_no_128bcl(9)
• dm_test_fill_gfx9_plane_attributes_dcc_rbplus_128b(9)
• dm_test_fill_gfx9_plane_attributes_dcc_rbplus_unconstrained(9)
• dm_test_fill_gfx9_plane_attributes_dcc_gfx9_64b(9)
• dm_test_fill_gfx9_plane_attributes_dcc_gfx9_unconstrained(9)

gfx12 plane attributes era 🌸

• dm_test_fill_gfx12_plane_attributes_block0(9)
• dm_test_fill_gfx12_plane_attributes_block_unconstrained(9)
• dm_test_fill_gfx12_plane_attributes_validate_fails(9)

plane buffer attributes 🧚

• dm_test_fill_plane_buffer_attributes_video(9)
• dm_test_fill_plane_buffer_attributes_gfx12(9)

more scaling lore 💅

• dm_test_get_min_max_dc_plane_scaling_fp16(9)
• dm_test_fill_dc_scaling_info_nv12_dcn1x(9)
• dm_test_fill_dc_scaling_info_plane_caps(9)

cursor said what she said 🎀

• dm_test_get_cursor_position_bad_size(9)

format_mod_supported reject arc 🦋

• dm_test_format_mod_supported_d_swizzle_reject(9)

atomic async checks 🌟

• dm_test_atomic_async_check_rejects(9)
• dm_test_atomic_async_check_overlay_cursor(9)

atomic check saga (grab a snack) 🍓

• dm_test_atomic_check_no_dc_state(9)
• dm_test_atomic_check_missing_crtc_state(9)
• dm_test_atomic_check_helper_failure(9)
• dm_test_atomic_check_color_pipeline_conflict(9)
• dm_test_atomic_check_scaling_failure(9)

panic flush 😭

• dm_test_panic_flush_no_dc_state(9)

plane state trilogy, the finale 💖

• dm_test_plane_reset_initializes_state(9)
• dm_test_plane_duplicate_state_copies_fields(9)
• dm_test_plane_destroy_state_minimal(9)

---

and that's the whole page bestie!! 🫶 this one ships out of ./drivers/gpu/drm/amd/display/... — the truncated little path you see down in the footer corner — and it's dated October 2026, so like… future icon behavior honestly. go forth and verify those video formats. slay. 💜✨