drm_crtc_vblank_on_config(9)

💖 drm_crtc_vblank_on_config(9) 💖

okay bestie, so this is a page straight out of the Kernel API Manual, and it's about drm_crtc_vblank_on_config(9) — which is lowkey the fancy version of turning vblank events on for a CRTC. yes, the name is a mouthful. no, we're not skipping it. let's get into it ✨

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🌸 SYNOPSIS 🌸

void drm_crtc_vblank_on_config (struct drm_crtc *crtc , const struct
drm_vblank_crtc_config *config );

literally the whole signature, character for character, because i would never do you dirty like that 🫶

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🎀 ARGUMENTS 🎀

• crtc — the CRTC in question. like, the one we're talking about. that one 👀
• config — the vblank configuration value. this is your custom vibe check for how vblank should behave on this CRTC.

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🦋 DESCRIPTION 🦋

so here's the tea: check out drm_crtc_vblank_on. that's the base function. this one does all that and lets you hand over a custom vblank configuration for a given CRTC. highkey a glow-up 💅

important note, bestie — config gets copied. so that pointer does not need to stay valid past this function call. you can let it go, it's fine, it's already been screenshotted 😭

for the deets on what all those parameters actually are, go look at struct drm_vblank_crtc_config. that's where the full rundown lives 🌈

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/gpu/drm/drm_vblank.c
• vblank handling(9)
• drm_crtc_accurate_vblank_count(9)
• drm_vblank_init(9)
• drm_dev_has_vblank(9)
• drm_crtc_vblank_waitqueue(9)
• drm_calc_timestamping_constants(9)
• drm_crtc_vblank_helper_get_vblank_timestamp_internal(9)
• drm_crtc_vblank_helper_get_vblank_timestamp(9)
• drm_crtc_get_last_vbltimestamp(9)
• drm_crtc_vblank_count(9)
• drm_vblank_count_and_time(9)
• drm_crtc_vblank_count_and_time(9)
• drm_crtc_next_vblank_start(9)
• drm_crtc_arm_vblank_event(9)
• drm_crtc_send_vblank_event(9)
• drm_crtc_vblank_get(9)
• drm_crtc_vblank_put(9)
• drm_crtc_wait_one_vblank(9)
• drm_crtc_vblank_off(9)
• drm_crtc_vblank_reset(9)
• drm_crtc_set_max_vblank_count(9)
• drm_crtc_vblank_on(9)
• drm_crtc_vblank_restore(9)
• drm_handle_vblank(9)
• drm_crtc_handle_vblank(9)
• drm_crtc_vblank_start_timer(9)
• drm_crtc_vblank_cancel_timer(9)
• drm_crtc_vblank_get_vblank_timeout(9)

like, the entire vblank friend group. no cap, that's the full list — every single one of them 💜

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okay and that's the page!! before you go, the source lives at ./drivers/gpu/drm and this version is dated October 2026 🎀 tysm for reading, go forth and enable those vblank events with your custom config, periodt 💖✨