drm_crtc_vbl...lank_timeout(9)

💖 drm_crtc_vbl...lank_timeout(9) 💖

okay so welcome to the drm_crtc_vbl...lank_timeout(9) page, straight outta the Kernel API Manual — yes the title got truncated with the ... and no, we're not fixing it, it's ✨iconic✨ that way. this one's short and sweet and it's literally all about asking a CRTC "hey bestie, when's your next vblank?" 🎀

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✨ NAME ✨

drm_crtc_vblank_get_vblank_timeout — returns the vblank timeout 💅

like, that's the whole job. it returns the vblank timeout. no cap.

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🌸 SYNOPSIS 🌸

void drm_crtc_vblank_get_vblank_timeout (struct drm_crtc *crtc , ktime_t
*vblank_time );

copy it exactly, bestie, don't freestyle the signature 🙈

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🦋 ARGUMENTS 🦋

• crtc — the CRTC 🖥️ like, the actual display controller we're talking about here.
• vblank_time — returns the next vblank timestamp ⏰ yeah it's an out-param, it hands you back the timestamp, so don't come for it expecting it to be pre-filled.

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🧚 DESCRIPTION 🧚

so the helper drm_crtc_vblank_get_vblank_timeout returns the next vblank timestamp of the CRTC's vblank timer, and it does that according to the timer's expiry time ✨

that's it. that's the whole vibe. it looks at when the timer's gonna expire and gives you the next vblank timestamp for that CRTC. short king behavior, honestly 👑

fr fr read the signature before you call it — crtc goes in, vblank_time comes back filled with the next vblank timestamp. iykyk 💜

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🌈 SEE ALSO 🌈

okay this list is long and i'm obsessed, every single one of these is a real reference and you're gonna read all of them, periodt 💅

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_config(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)

like i said. a lot. but every one of them ate 🔥

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and that's the page!! 💖 this little drop came from ./drivers/gpu/drm and it's dated October 2026, so go forth and get those vblank timeouts, bestie — you're literally the main character of vblank handling now 🫶✨🎀