radeon_atcs_parse_functions(9)

💅 radeon_atcs_parse_functions(9) — or, "so what can this GPU actually DO bestie"

okay so this is a page from the Kernel API Manual (yes the whole big kernel man page situation, we're in it) and it's about one tiny lil function that reads a bitmask and tells you which ATCS functions your hardware supports. it's short, it's sweet, it's giving "one job and it does it." let's go 🎀

---

✨ NAME ✨

radeon_atcs_parse_functions — parse supported functions 💫

like, literally just that. it parses. it figures out what's supported. no cap.

---

🌸 SYNOPSIS 🌸

void radeon_atcs_parse_functions (struct radeon_atcs_functions *f , u32 mask );

returns nothing (it's void, she's just here to fill in a struct, not to give you answers directly 🫶), takes a pointer to the functions struct and a u32 mask. that's the whole vibe check.

---

🦋 ARGUMENTS 🦋

• f — the supported functions struct 💖 this is the output bestie, this is where the good stuff lands, the whole point of the function tbh
• mask — the supported functions mask, straight from ATCS ✨ this is the raw truth from the firmware side, unparsed, just vibes and bits

---

👑 DESCRIPTION 👑

so here's the tea:

you take the supported functions mask that came out of the ATCS function ATCS_FUNCTION_VERIFY_INTERFACE, and you use it to determine what functions are supported. that's it, that's the function. (and this applies to all asics, not just your fav one — everyone gets the same treatment 💅)

the way that this is literally just "i have a mask, i will now translate that mask into knowledge" — iconic. main character energy for a bitmask parser honestly.

ngl it's a small function, but it's the bridge between "the firmware said some bits" and "the driver knows what it can do." respect the pipeline 🔥

---

🧚 SEE ALSO 🧚

the kernel file lives at ./drivers/gpu/drm/radeon/radeon_acpi.c and honestly the whole friend group is worth a read 💜:

• radeon_atif_call(9)
• radeon_atif_parse_notification(9)
• radeon_atif_parse_functions(9)
• radeon_atif_verify_interface(9)
• radeon_atif_get_notification_params(9)
• radeon_atif_get_sbios_requests(9)
• radeon_atif_handler(9)
• radeon_atcs_call(9)
• radeon_atcs_verify_interface(9)
• radeon_acpi_is_pcie_performance_request_supported(9)
• radeon_acpi_pcie_notify_device_ready(9)
• radeon_acpi_pcie_performance_request(9)
• radeon_acpi_event(9)
• radeon_acpi_init(9)
• radeon_acpi_fini(9)

like, all of them. the entire acpi crew. go say hi 🍓

---

and that's the whole page bestie 💖 sourced from ./drivers/gpu/drm/radeon, stamped October 2026, filed under radeon_atcs_parse_functions(9) in the Kernel API Manual. slay, go parse some functions, mwah 🎀✨🌈