v4l2_match_dv_timings(9)

💅 v4l2_match_dv_timings(9) 💅

okay bestie, so we're in the Kernel API Manual today and this page is literally about one tiny function that asks the biggest question of all: do these two timings match? 👀 Like, do they actually match or are they just wearing the same outfit? Let's get into it.

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✨ NAME ✨

v4l2_match_dv_timings — the vibe-check function: do two timings match? 🫶

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🦋 SYNOPSIS 🦋

bool v4l2_match_dv_timings (const struct v4l2_dv_timings *measured ,
const struct v4l2_dv_timings *standard , unsigned pclock_delta , bool
match_reduced_fps );

no cap, that's the whole signature. it returns a bool, so it's giving yes-or-no main character energy 💖

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🎀 ARGUMENTS 🎀

• measured — the timings data that was actually measured. like, the real-world receipts 📋✨
• standard — the timings according to the standard. the blueprint, the textbook, the "this is how it's supposed to be" 👑
• pclock_delta — the maximum delta in Hz between standard->pixelclock and the measured timings. so like, a lil wiggle room, in Hz, before we're like "nope, different" 🌸
• match_reduced_fps — if true, then it fails if V4L2_DV_FL_REDUCED_FPS does not match. strict queen behavior, honestly 💅

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🔥 DESCRIPTION 🔥

okay so here's the whole tea: it returns true if the two timings match, and returns false otherwise. that's it. that's the function. short and iconic, fr fr 🧚

ngl bestie, this one is a one-liner of a description, so let's not overthink it — true means match, false means no match. periodt. 💀

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🌈 SEE ALSO 🌈

the kernel file is ./include/media/v4l2-dv-timings.h, and then we've got the whole friend group 💜:

v4l2_calc_timeperframe(9), v4l2_check_dv_timings_fnc(9), v4l2_valid_dv_timings(9), v4l2_enum_dv_timings_cap(9), v4l2_find_dv_timings_cap(9), v4l2_find_dv_timings_cea861_vic(9), v4l2_print_dv_timings(9), v4l2_detect_cvt(9), v4l2_detect_gtf(9), v4l2_calc_aspect_ratio(9), v4l2_dv_timings_aspect_ratio(9), can_reduce_fps(9), struct v4l2_hdmi_colorimetry(9)

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aaaaand that's the page!! 🎀 this lil icon lives in ./include/media, dated October 2026, and it's the October 2026 edition of v4l2_match_dv_timings(9) — go be the timing-matcher you were always meant to be, bestie 💖✨👑