drm_err_printer(9)

💅 drm_err_printer(9)

okay bestie so this is a page from the Kernel API Manual — yes, the Kernel API Manual, we're doing kernel docs today and honestly? iconic of us. This one's about drm_err_printer, a little function that hands you back a &drm_printer which spits its output straight into drm_err(). that's it, that's the whole vibe. 🎀

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✨ NAME ✨

drm_err_printer — construct a &drm_printer that outputs to drm_err()

like, it builds you a printer object, and that printer's whole personality is "everything goes to drm_err()." no cap. 🦋

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🌸 SYNOPSIS 🌸

struct drm_printer drm_err_printer (struct drm_device *drm , const char
       *prefix );

so you call it, you get a struct drm_printer back. she's giving factory energy. ✨

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💖 ARGUMENTS 💖

• drm — the struct drm_device pointer. yep, the drm device pointer, the whole reason we're here 🫶
• prefix — the debug output prefix. lowkey important: pass NULL if you want no prefix at all. that's the escape hatch, iykyk 💅

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👑 RETURN 👑

you get the drm_printer object back. that's the whole return value, and honestly she ate. 🌈

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🔥 SEE ALSO 🔥

okay this is the friend group, everyone say hi 👋 — and note the kernel file that goes with all this: ./include/drm/drm_print.h

• print(9)
• enum drm_debug_category(9)
• struct drm_printer(9)
• drm_vprintf(9)
• drm_printf_indent(9)
• struct drm_print_iterator(9)
• drm_coredump_printer(9)
• drm_coredump_printer_is_full(9)
• drm_seq_file_printer(9)
• drm_info_printer(9)
• drm_dbg_printer(9)
• drm_line_printer(9)
• DRM_DEV_ERROR(9)
• DRM_DEV_ERROR_RATELIMITED(9)
• DRM_DEV_DEBUG(9)
• DRM_DEV_DEBUG_DRIVER(9)
• DRM_DEV_DEBUG_KMS(9)

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ngl bestie, every single one of those cross-references matters — that's the whole printer family tree and the macro squad too. don't skip 'em. 💀

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⭐ and that's the page!! sign-off time: this lil doc lives over in ./include/drm, it's dated October 2026, and it's filed under drm_err_printer(9) — go forth and print, main character. 💜🧚🍓