r100_hpd_sense(9)

✨ r100_hpd_sense(9) — the vibe check for ur monitor 💅

okay so real talk, bestie — this is a page straight out of the Kernel API Manual, and it's all about one tiny lil function that answers the biggest question of all: is something actually plugged in?? 🫶 Let's get into it.

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🌸 NAME 🌸

r100_hpd_sense — the hpd sense callback, and yes it's exactly as iconic as it sounds ✨

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🎀 SYNOPSIS 🎀

bool r100_hpd_sense (struct radeon_device *rdev , enum radeon_hpd_id hpd
);

literally just one call, two args, returns a bool. so clean. so slay. 💅

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🦋 ARGUMENTS 🦋

• rdev — a radeon_device pointer. it's giving "the whole device, bestie" energy 👑
• hpd — the hpd (hotplug detect) pin. yes, that pin. the one that's literally in charge of noticing things 🎀

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💖 DESCRIPTION 💖

so what does it actually do? it checks if a digital monitor is connected (that's for r1xx–r4xx, iykyk 🔥).

the way that it works is so simple it's almost rude: returns true if connected, false if not connected. that's it. that's the whole function. main character energy fr fr 💀

no cap, it doesn't guess. it doesn't vibe-check twice. it just tells u yes or no. periodt. ✨

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🌈 SEE ALSO 🌈

the kernel file is ./drivers/gpu/drm/radeon/r100.c — go read it if ur feeling brave, bestie 🫶

and the whole friend group shows up too:

• r100_wait_for_vblank(9)
• r100_page_flip(9)
• r100_page_flip_pending(9)
• r100_pm_get_dynpm_state(9)
• r100_pm_init_profile(9)
• r100_pm_misc(9)
• r100_pm_prepare(9)
• r100_pm_finish(9)
• r100_gui_idle(9)
• r100_hpd_set_polarity(9)
• r100_hpd_init(9)
• r100_hpd_fini(9)
• r100_ring_hdp_flush(9)
• r100_cs_packet_parse_vline(9)

like a whole squad of r100 functions, all iconic, all doing their thing 💜

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🧚 sign-off 🧚

this page lives in ./drivers/gpu/drm/radeon, dated October 2026, and it's r100_hpd_sense(9) forever and always 🎀💖 mwah, go touch some hardware (metaphorically) 🦋⭐

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