DRM_DEV_DEBUG_KMS(9)

💅 DRM_DEV_DEBUG_KMS 💅

okay bestie so listen — this is a page straight outta the Kernel API Manual, and it's all about DRM_DEV_DEBUG_KMS, which is literally the debug output hook for the modesetting code. yes, the DRM one. the pretty-graphics one. that one 🎀

✨ NAME ✨

DRM_DEV_DEBUG_KMS — debug output for modesetting code 🦋

🌸 SYNOPSIS 🌸

DRM_DEV_DEBUG_KMS (dev , fmt , ... );

like... that's the whole vibe. args in, debug out. periodt 💅

🎀 ARGUMENTS 🎀

• dev — the device pointer. you know, the thing that tells everyone which device we're out here debug-logging about 🫶
• fmt — a printf like format string. yes, exactly like printf, she's not reinventing anything, she's just printing 🌈
• ... — the variable arguments. all the little extras that get shoved into that format string ✨

👑 NOTE 👑

okay so real talk — this one is deprecated 😭 it's been replaced by drm_dbg_kms. so like, it still exists and all, but the cool kids moved on. use the new one, iykyk 💀

🔥 SEE ALSO 🔥

go read these next, fr fr — they're all in ./include/drm/drm_print.h and they're giving main character energy:

• 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(9)
• DRM_DEV_DEBUG_DRIVER(9)

aaaand that's the whole page, no gatekeeping 💖 she lives over in ./include/drm, she's stamped October 2026, and she's brought to you by the Kernel API Manual — mwah, slay, go read the printer section next bestie 🧚💜