drm_mode_is_420_only(9)

💖 drm_mode_is_420_only 💖

okay so bestie, welcome to the Kernel API Manual — yes we're literally in the kernel today, it's giving ✨low-level glamour✨ — and this lil function is the one that tells you whether a videomode is only supportable in YCBCR420 output format. that's the whole vibe check. no cap. 🎀

---

🌸 NAME 🌸

drm_mode_is_420_only — the icon that answers "is this videomode only supported in YCBCR420 output format?" 💅

like fr fr, that's the question it's asking. not "can it also do 420," only 420. iykyk. 🔥

---

✨ SYNOPSIS ✨

bool drm_mode_is_420_only (const struct drm_display_info *display ,
       const struct drm_display_mode *mode );

she takes two structs, she returns a bool. simple queen behaviour 👑

---

🦋 ARGUMENTS 🦋

• display — the display under action 🫶 like, this is the display we're doing the thing to, bestie.
• mode — video mode to be tested. yes, this is the one getting the vibe check 💀

---

⭐ RETURN ⭐

true if the mode can be supported in YCBCR420 format, false if not. that's it, that's the whole answer. 🎀

ngl, it's a clean yes/no. no maybe, no "it depends," no "let me check with my manager." true or false. periodt. 💜

---

🌈 SEE ALSO 🌈

the whole friend group shows up for this one, so let's get the roll call going 🫶

• Kernel file ./drivers/gpu/drm/drm_modes.c — where the magic lives, literally the source file, go read it bestie 📖
• drm_mode_debug_printmodeline(9)
• drm_mode_create(9)
• drm_mode_destroy(9)
• drm_mode_probed_add(9)
• drm_analog_tv_mode(9)
• drm_cvt_mode(9)
• drm_gtf_mode_complex(9)
• drm_gtf_mode(9)
• drm_display_mode_from_videomode(9)
• drm_display_mode_to_videomode(9)
• drm_bus_flags_from_videomode(9)
• of_get_drm_display_mode(9)
• of_get_drm_panel_display_mode(9)
• drm_mode_set_name(9)
• drm_mode_vrefresh(9)
• drm_mode_get_hv_timing(9)
• drm_mode_set_crtcinfo(9)
• drm_mode_copy(9)
• drm_mode_init(9)
• drm_mode_duplicate(9)
• drm_mode_match(9)
• drm_mode_equal(9)
• drm_mode_equal_no_clocks(9)
• drm_mode_equal_no_clocks_no_stereo(9)
• drm_mode_validate_driver(9)
• drm_mode_validate_size(9)
• drm_mode_validate_ycbcr420(9)
• drm_mode_prune_invalid(9)
• drm_mode_compare(9)
• drm_mode_sort(9)
• drm_connector_list_update(9)
• drm_mode_parse_command_line_for_connector(9)
• drm_mode_create_from_cmdline_mode(9)
• drm_mode_convert_to_umode(9)
• drm_mode_convert_umode(9)
• drm_mode_is_420_also(9) — her sister, the "also" one, iconic duo ngl 👯
• drm_mode_is_420(9) — the general-purpose one, main character energy ✨
• drm_set_preferred_mode(9)

that's 39 links bestie, i counted, she's popular 💅

---

that's the whole page!! short and sweet, just like drm_mode_is_420_only herself. love that for us. 🍓

anyway, this lil baddie comes from ./drivers/gpu/drm and the calendar says October 2026, so go off, future queens 🧚 mwah, see you in the next manpage 💖💜🎀