DRM_CAP_CRTC...VBLANK_EVENT(9)

💅 DRM_CAP_CRTC...VBLANK_EVENT(9) 💅

okay bestie, so this is a page straight out of the Kernel API Manual and honestly? it's a short one but it's lowkey iconic. let's get into it ✨

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🌸 NAME 🌸

DRM_CAP_CRTC_IN_VBLANK_EVENT — (yes that's it, that's the whole name, the original literally just leaves it hanging with a dash and nothing after it, and we respect the mystery 🫶)

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✨ SYNOPSIS ✨

DRM_CAP_CRTC_IN_VBLANK_EVENT

that's the whole vibe check. one line. no arguments, no flags, no chaos. it's giving "I said what I said" energy 👑

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🦋 DESCRIPTION 🦋

okay so here's the actual tea ☕

If this capability is set to 1, the kernel supports reporting the CRTC ID inside drm_event_vblank.crtc_id for the DRM_EVENT_VBLANK and DRM_EVENT_FLIP_COMPLETE events. like, it just tells you which CRTC the event came from. very demure, very mindful 💅

And starting with kernel version 4.12, this capability is always set to 1. no cap, fr fr — from 4.12 onward you don't even gotta worry about it, it's just on. periodt. 🎀

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🌈 SEE ALSO 🌈

okay this is the part where the original page absolutely goes OFF with the cross-references, so buckle up bestie, we're listing every single one 🧚💖

• Kernel file ./tools/perf/trace/beauty/include/uapi/drm/drm.h struct drm_gem_close(9), struct drm_gem_flink(9), struct drm_gem_open(9), struct drm_gem_change_handle(9)
• DRM_CAP_DUMB_BUFFER(9)
• DRM_CAP_VBLANK_HIGH_CRTC(9)
• DRM_CAP_DUMB_PREFERRED_DEPTH(9)
• DRM_CAP_DUMB_PREFER_SHADOW(9)
• DRM_CAP_PRIME(9)
• DRM_PRIME_CAP_IMPORT(9)
• DRM_PRIME_CAP_EXPORT(9)
• DRM_CAP_TIMESTAMP_MONOTONIC(9)
• DRM_CAP_ASYNC_PAGE_FLIP(9)
• DRM_CAP_CURSOR_WIDTH(9)
• DRM_CAP_CURSOR_HEIGHT(9)
• DRM_CAP_ADDFB2_MODIFIERS(9)
• DRM_CAP_PAGE_FLIP_TARGET(9)
• DRM_CAP_SYNCOBJ(9)
• DRM_CAP_SYNCOBJ_TIMELINE(9)
• DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP(9)
• DRM_CLIENT_CAP_STEREO_3D(9)
• DRM_CLIENT_CAP_UNIVERSAL_PLANES(9)
• DRM_CLIENT_CAP_ATOMIC(9)
• DRM_CLIENT_CAP_ASPECT_RATIO(9)
• DRM_CLIENT_CAP_WRITEBACK_CONNECTORS(9)
• DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT(9)
• DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE(9)
• struct drm_syncobj_eventfd(9)
• DRM_IOCTL_GEM_CLOSE(9)
• DRM_IOCTL_PRIME_HANDLE_TO_FD(9)
• DRM_IOCTL_PRIME_FD_TO_HANDLE(9)
• DRM_IOCTL_MODE_RMFB(9)
• DRM_IOCTL_MODE_CREATE_DUMB(9)
• DRM_IOCTL_MODE_GETFB2(9)
• DRM_IOCTL_SYNCOBJ_EVENTFD(9)
• DRM_IOCTL_MODE_CLOSEFB(9)
• DRM_IOCTL_SET_CLIENT_NAME(9)
• DRM_IOCTL_GEM_CHANGE_HANDLE(9)
• struct drm_event(9)
• DRM_EVENT_VBLANK(9)
• DRM_EVENT_FLIP_COMPLETE(9)
• DRM_EVENT_CRTC_SEQUENCE(9)

like, that's a whole friend group right there 💀🫶 go read them, they're all gonna make sense together, iykyk.

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🎀 the little sign-off 🎀

okay that's the page!! source file lived at ./tools/perf/trace/beauty/incl... (yes it's truncated, that's how it showed up, we don't gatekeep 🍓), and this whole thing is dated October 2026 🌸

slay, you read the whole thing, main character energy fr fr 👑💖 bye bestie!! 💜✨