can_reduce_fps(9)

🌸 NAME 🌸

okay bestie, this is can_reduce_fps(9) — the little function that checks if the conditions for reduced fps are true. 💅

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✨ SYNOPSIS ✨

bool can_reduce_fps (struct v4l2_bt_timings *bt );

the way this reads: you hand it a pointer to a struct v4l2_bt_timings, and you get a bool back. cute, right? 🫶

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🎀 ARGUMENTS 🎀

• bt — the v4l2 timing structure. literally the timing data this function is checking. 🎀

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💅 DESCRIPTION 💅

Different timings are allowed to have reduced fps when the right conditions hit. here’s the checklist, bestie:

• For CVT timings: reduced fps is allowed if reduced blanking v2 is true — that’s the vsync == 8 moment. ✨
• For CEA861 timings: reduced fps is allowed if the V4L2_DV_FL_CAN_REDUCE_FPS flag is true. 💜

that’s the whole vibe check. no cap. 💅

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🦋 SEE ALSO 🦋

kernel file first, then the whole friend group:

• Kernel file: ./include/media/v4l2-dv-timings.h
• 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_match_dv_timings(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)
• struct v4l2_hdmi_colorimetry(9)

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mwah 💖 source/version: ./include/media · date: October 2026 — go check those timings, bestie 🫶