drm_crtc_vblank_off(9)

✨ drm_crtc_vblank_off(9) ✨

okay so bestie, welcome to the Kernel API Manual — this page is literally all about drm_crtc_vblank_off, no cap 💅

---

🌸 NAME 🌸

drm_crtc_vblank_off — disable vblank events on a CRTC 🎀

---

🦋 SYNOPSIS 🦋

void drm_crtc_vblank_off (struct drm_crtc *crtc );

---

💖 ARGUMENTS 💖

• crtc — the CRTC in question, iykyk 👑

---

✨ DESCRIPTION ✨

So here's the vibe: drivers can use this function to shut down the vblank interrupt handling when they're disabling a crtc. Like, turning it off off. 🫶

The important bit — and this is the part you gotta remember — is that this function makes sure the latest vblank frame count is stored, so that drm_vblank_on can restore it again later. Saving your spot, basically, but for frame counts 💾✨

🚨 Drivers must use this function when the hardware vblank counter can get reset — for example when suspending, or when disabling the crtc in general. Not optional, bestie. This is a must. 🙈

---

🎀 SEE ALSO 🎀

the whole friend group, fr fr 💜

• 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_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)
• drm_crtc_vblank_get_vblank_timeout(9)

---

that's the whole page, bestie — go slay some vblank interrupts 💅🔥

sign-off time 🫶 this one lives in ./drivers/gpu/drm, and the date on it is October 2026 — iconic, honestly. ⭐🌸