drm_crtc_from_index(9)

✨ drm_crtc_from_index(9) ✨

okay so bestie, welcome to the Kernel API Manual — this one lives in drm_crtc_from_index(9) and it's genuinely one of the more wholesome little helpers in the DRM universe 🎀

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🌸 NAME 🌸

drm_crtc_from_index — find the registered CRTC at an index 💅

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🦋 SYNOPSIS 🦋

struct drm_crtc * drm_crtc_from_index (struct drm_device *dev , int idx );

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🎀 ARGUMENTS 🎀

• dev — the DRM device, your main character 🫶
• idx — the index of the registered CRTC you're trying to hunt down 🔍

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💖 DESCRIPTION 💖

So like, you hand it a CRTC index and it goes and returns the registered CRTC from the DRM device's list of CRTCs — the one whose index matches. That's it, that's the whole vibe ✨

This is the inverse of drm_crtc_index, no cap. It's lowkey iconic in the vblank callbacks (think drm_driver.enable_vblank or drm_driver.disable_vblank), because those are still out here dealing with indices instead of pointers to struct drm_crtc. iykyk 😭

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💀 SEE ALSO 💀

• Kernel file ./drivers/gpu/drm/drm_crtc.c
• overview(9)
• standard CRTC properties(9)
• drm_crtc_init_with_planes(9)
• drmm_crtc_init_with_planes(9)
• drm_crtc_cleanup(9)
• drm_mode_getcrtc(9)
• drm_mode_set_config_internal(9)
• drm_crtc_check_viewport(9)
• drm_mode_setcrtc(9)
• drm_crtc_create_scaling_filter_property(9)
• drm_crtc_in_clone_mode(9)

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and that's the whole page, bestie — go off 💜

🦋 sign-off tea: this one comes to you from ./drivers/gpu/drm, dated October 2026, and it's filed under drm_crtc_from_index(9) in case you ever need to find it again ✨🍓