STRUCT DRM_VC4_WAIT_SEQNO(9)

💖 struct drm_vc4_wait_seqno 💖

okay bestie, welcome to the Kernel API Manual corner of the group chat — this one is literally the ioctl argument for waiting for DRM_VC4_SUBMIT_CL completion using its returned seqno. no cap, that’s the whole vibe ✨

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🌸 NAME 🌸

struct drm_vc4_wait_seqno — ioctl argument for waiting for DRM_VC4_SUBMIT_CL completion using its returned seqno. periodt 💅

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🎀 SYNOPSIS 🎀

struct drm_vc4_wait_seqno {
    __u64 seqno;
    __u64 timeout_ns;
};

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🫶 Members 🫶

the struct members are right there in the synopsis, bestie: seqno and timeout_ns. and timeout_ns gets the full tea in the next section 👑

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✨ Description ✨

timeout_ns is the timeout in nanoseconds, where 0 means “don’t block, just return the status.” literally that’s it, iconic behavior honestly 🦋

lowkey important: 0 is not “wait forever” — it’s “don’t block, just return the status.” keep that in mind, bestie 💖

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🔥 SEE ALSO 🔥

• Kernel file ./include/uapi/drm/vc4_drm.h struct drm_vc4_submit_cl(9)
• struct drm_vc4_wait_bo(9)
• struct drm_vc4_create_bo(9)
• struct drm_vc4_mmap_bo(9)
• struct drm_vc4_create_shader_bo(9)
• struct drm_vc4_label_bo(9)

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that’s the page, bestie 🎀 source/version: ./include/uapi/drm · date: October 2026 · page: struct drm_vc4_wait_seqno(9) — go wait on that seqno, slay 💅✨