drm_client_m...t_for_vblank(9)

💅 drm_client_m...t_for_vblank(9) 💅

okay bestie, this one is straight outta the Kernel API Manual and it's all about waiting for that sweet, sweet VBLANK ✨

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🎀 NAME 🎀

drm_client_modeset_wait_for_vblank — wait for the next VBLANK to occur 💖

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🦋 SYNOPSIS 🦋

int drm_client_modeset_wait_for_vblank (struct drm_client_dev *client ,
unsigned int crtc_index );

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🌸 ARGUMENTS 🌸

• client — the DRM client 👑
• crtc_index — the ndex of the CRTC to wait on (yes, ndex 💀 iykyk)

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✨ DESCRIPTION ✨

okay so literally: this blocks the caller until the given CRTC has seen a VBLANK 🫶

If the CRTC is disabled, it does nothing — no drama, no cap 🙈

heads up bestie: if there's another DRM master present, this fails with -EBUSY 💀 dramatic but true.

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🔥 RETURN 🔥

0 on success, or a negative error code otherwise ⭐

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/drm_client_modeset.c
• drm_client_modeset_probe(9)
• drm_client_rotation(9)
• drm_client_modeset_check(9)
• drm_client_modeset_commit_locked(9)
• drm_client_modeset_commit(9)
• drm_client_modeset_dpms(9)

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mwah 💖 this lil page comes from ./drivers/gpu/drm, dated October 2026, and it's all about drm_client_m...t_for_vblank(9) — periodt 👑✨