STRUCT DRM_V3D_COPY_TIMESTAMP_QUERY(9)

💅 struct drm_v3d_copy_timestamp_query 💅

okay so bestie, welcome to the struct drm_...estamp_query(9) page, straight out of the Kernel API Manual ✨ this one's a struct, it lives in the kernel API docs, and it's genuinely not scary, i promise 🫶

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🌸 NAME 🌸

struct drm_v3d_copy_timestamp_query — it's the ioctl extension that lets the CPU job copy query results over to a buffer 💖 no cap, that's the whole vibe of this thing.

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✨ SYNOPSIS ✨

here's the shape of it, copy-pasted with love and zero typos:

struct drm_v3d_copy_timestamp_query {
    struct drm_v3d_extension base;
    __u8 do_64bit;
    __u8 do_partial;
    __u8 availability_bit;
    __u8 pad;
    __u32 offset;
    __u32 stride;
    __u32 count;
    __u64 offsets;
    __u64 syncs;
 };

like, look at her. all those little fields lined up. main character energy fr 🌈

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🎀 Members 🎀

okay the original page just says Members and then immediately moves on, so there's no per-member commentary to give you here 🙈 the field list is up there in the synopsis, and that's the canon version — base, do_64bit, do_partial, availability_bit, pad, offset, stride, count, offsets, syncs, each with the exact type shown above. that's it, that's the section 💀

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🦋 Description 🦋

so here's the tea ☕ when an extension with DRM_V3D_EXT_ID_CPU_COPY_TIMESTAMP_QUERY is defined, it points to this extension to define a copy timestamp query submission. like, that's its whole job, and it does it slayfully.

and then — this is the good part — this CPU job copies the timestamp queries results to a BO, using the offset and stride that you defined in the extension. literally. iconic. that's the behaviour, no notes ✨

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👑 SEE ALSO 👑

go read these next bestie, they're all in the Kernel file ./include/uapi/drm/v3d_drm.h and they all ate 💅

• struct drm_v3d_multi_sync(9)
• struct drm_v3d_submit_cl(9)
• struct drm_v3d_wait_bo(9)
• struct drm_v3d_create_bo(9)
• struct drm_v3d_mmap_bo(9)
• struct drm_v3d_indirect_csd(9)
• struct drm_v3d_timestamp_query(9)
• struct drm_v3d_reset_timestamp_query(9)
• struct drm_v3d_reset_performance_query(9)
• struct drm_v3d_copy_performance_query(9)
• struct drm_v3d_perfmon_get_counter(9)
• struct drm_v3d_perfmon_set_global(9)

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ngl, reading kernel headers is a whole skill and you're doing amazing 🫶 iykyk.

alright bestie, that's the page 💖 it came from source ./include/uapi/drm, dated October 2026, and it's titled struct drm_...estamp_query(9) up top and down at the bottom too. mwah, go forth and copy those timestamp queries 🎀⭐💜