drm_mode_compare(9)

💖 drm_mode_compare(9) 💖

okay so bestie, welcome to the kernel API manual — this one's drm_mode_compare, and yes it's a whole function that literally just vibes about which display mode is better 🔥

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✨ NAME ✨

drm_mode_compare — compare modes for favorability 🎀

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✨ SYNOPSIS ✨

int drm_mode_compare (void *priv , const struct list_head *lh_a , const
struct list_head *lh_b );

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✨ ARGUMENTS ✨

• priv — unused. yeah. it's just there. not doing anything. icon of showing up 💀
• lh_a — the list_head for the first mode 🅰️
• lh_b — the list_head for the second mode 🅱️

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✨ DESCRIPTION ✨

So the way this works: you hand it two modes, lh_a and lh_b, and it compares them, returning a value that tells you which one is better. that's it, that's the whole vibe check 👑✨

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✨ RETURN ✨

• Negative — if lh_a is better than lh_b 🥇
• Zero — if they're equivalent, a whole tie, no notes 🫶
• Positive — if lh_b is better than lh_a 🏆

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✨ SEE ALSO ✨

Kernel file: ./drivers/gpu/drm/drm_modes.c 🦋

• 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_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_only(9)
• drm_mode_is_420_also(9)
• drm_mode_is_420(9)
• drm_set_preferred_mode(9)

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that's the whole page bestie, go forth and compare modes responsibly 💅✨

shoutout to ./drivers/gpu/drm for being the home of this whole situation, and to October 2026 for the timestamp 🩷 mwah, ilysm, bye 🧚‍♀️💜