radeon_invalid_wreg(9)

💅 radeon_invalid_wreg(9) — the Kernel API Manual page you didn't know you needed 🎀

okay so bestie, we're in the Kernel API Manual today and this one's literally a nothing-burger in the best way possible. it's radeon_invalid_wreg, and no cap, its whole personality is not doing the thing. iconic behavior honestly. 💖

---

✨ NAME ✨

radeon_invalid_wreg — the dummy reg write function 🫶 (yes that's its whole job, and it ate)

---

🌸 SYNOPSIS 🌸

void radeon_invalid_wreg (struct radeon_device *rdev , uint32_t reg ,
       uint32_t v );

like, look at it. three args, zero drama, returns nothing because it's above that. 💅

---

🦋 ARGUMENTS 🦋

• rdev — your radeon device pointer, the main character of literally every radeon function ever 💜
• reg — the offset of the register (i.e. where we'd be writing, if we were the writing type)
• v — the value to write to the register (i.e. what we'd be writing, which, spoiler, we are not)

---

🌈 DESCRIPTION 🌈

okay so here's the tea: this is a Dummy register read function. yeah. the manpage said "read" and we're keeping that exactly as-is, don't come for me, that's what it says, i'm just the messenger 🫶

it's used for register blocks that certain asics don't have — and then it hits you with the "(all asics)" in parentheses, which is sending me, because it means: for the register blocks that certain asics don't have, this applies to all asics fr fr. so it's the universal "nah" function. the vibe check every register write fails. we love a consistent queen. 👑

basically: you think you're writing to a register. you are not. nothing happens. that's the whole plot. 😭

---

🧚 SEE ALSO 🧚

• Kernel file ./drivers/gpu/drm/radeon/radeon_asic.c (go read the source, iykyk)
• radeon_invalid_rreg(9) — its sibling, equally unemployed 💀
• radeon_register_accessor_init(9)
• radeon_agp_disable(9)
• radeon_asic_init(9)

---

⭐ little reminder bestie: this is a dummy function, so don't be out here expecting it to actually write anything to reg. that's not a bug, that's the entire point. no cap. 🙈

---

and that's the page! 💖 brought to you from ./drivers/gpu/drm/radeon, dated October 2026, and yes the version string is literally just the directory because the kernel docs said "path is the personality." slay. 🎀✨🦋💜