DRM_DEV_DEBUG(9)

💅 DRM_DEV_DEBUG — bestie's guide to debug output for generic drm code

okay so this is a page straight out of the Kernel API Manual, and the star of the show is DRM_DEV_DEBUG(9) ✨ — literally the debug-output baddie for generic drm code. she's iconic, she's useful, and she is also, um, a little bit retired (more on that in a sec, don't come for me 😭).

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🌸 SYNOPSIS 🌸

DRM_DEV_DEBUG (dev , fmt , ... );

that's the whole vibe. one call, a device, a format, and however many extra args you feel like throwing at it 🫶.

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🎀 ARGUMENTS 🎀

• dev — the device pointer. like, whose device are we talking about, bestie? this one.
• fmt — a printf-like format string. yes, the same energy as printf, so you already know what you're doing 💅.
• ... — variable arguments. the lil extras that fill in the blanks in your fmt. throw in as many as the format asks for.

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⚠️ NOTE ⚠️

this is deprecated in favor of drm_dbg_core.

fr fr, she said it herself. not me being dramatic — this is deprecated, so treat her like a throwback track, not the new release. when you're writing fresh code, drm_dbg_core is the main character 👑. this is not a "maybe", she's genuinely marked deprecated, so don't build new stuff on her.

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🔥 SEE ALSO 🔥

the whole friend group, in the order they showed up 💖 — and yes, the kernel file ./include/drm/drm_print.h is part of the list, so she's getting a shoutout too:

• Kernel file ./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_err_printer(9)
• drm_line_printer(9)
• DRM_DEV_ERROR(9)
• DRM_DEV_ERROR_RATELIMITED(9)
• DRM_DEV_DEBUG_DRIVER(9)
• DRM_DEV_DEBUG_KMS(9)

like, go read all of them, iykyk 🦋.

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and that's the whole page, bestie 🌈 — sourced from that ./include/drm corner of the tree, dated October 2026, filed under DRM_DEV_DEBUG(9). mwah, go debug something cute 💅✨🍓