drm_debugfs_add_file(9)

💅 drm_debugfs_add_file(9) — from the Kernel API Manual, bestie ✨

Okay so picture this: you're deep in the kernel docs, the manual name is drm_debugfs_add_file(9), and you just want your DRM device to have a cute little debugfs file of its very own. That's literally this page. Buckle up 🎀

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✨ NAME ✨

drm_debugfs_add_file — the function that adds a given file to the DRM device's debugfs file list 🦋

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🌸 SYNOPSIS 🌸

void drm_debugfs_add_file (struct drm_device *dev , const char *name ,
       int (*show)(struct seq_file*, void*) , void *data );

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💖 ARGUMENTS 💖

• dev — the drm device for the ioctl. Your main character 💅
• name — the debugfs file name. Name her something iconic, she deserves it 🎀
• show — the show callback. This is where the pretty printing happens ✨
• data — driver-private data, and no cap, it should not be device-specific 🫶

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🌈 DESCRIPTION 🌈

So what it actually does: it adds a given file entry to the DRM device's debugfs file list, and that entry gets created later on at drm_debugfs_init. Lowkey the whole point 😌✨

ngl the data note is a real vibe check — "driver-private data, should not be device-specific". Keep it driver-private, not device-private. Don't make it weird 🙈

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🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/drm_debugfs.c — the whole squad, all referenced together, iykyk:

• drm_debugfs_gpuva_info(9)
• drm_debugfs_create_files(9)
• drm_debugfs_clients_add(9)
• drm_debugfs_clients_remove(9)
• drm_debugfs_dev_init(9)
• drm_debugfs_dev_fini(9)
• drm_debugfs_add_files(9)

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Alright bestie, that's the whole page! 💜 This icon dropped from ./drivers/gpu/drm back in October 2026, so if you're reading this in the future — hiii, hope the kernel's treating you well 🧚⭐💖