smu_cmn_get...rom_firmware(9)

📦 version 7.3.1, in nixpkgs unstable

💅 smu_cmn_get_pptable_from_firmware — like, the NAME section, bestie

okay so picture this: smu_cmn_get_pptable_from_firmware — it locates the soft pptable that's embedded in the SMC firmware binary. that's it, that's the whole vibe. it's giving "find the thing inside the bigger thing" ✨

this one lives in the Kernel API Manual, section 9, and it's genuinely so useful once you get it, i promise 🫶

🌸 SYNOPSIS 🌸

int smu_cmn_get_pptable_from_firmware (struct smu_context *smu , void
**table , uint32_t *size , uint32_t pptable_id );

like, yes, the wrapping is ugly, but that's literally how it's written, no cap 😭 copy it exactly and you're golden 💖

🎀 ARGUMENTS 🎀

  • smu — the SMU context, aka the main character of this whole function 💅
  • table — on success, this gets set to the start of the pptable within the firmware blob. like a little pointer bookmark 🦋
  • size — on success, set to the pptable size in bytes. yes, in bytes, don't @ me 🍓
  • pptable_id — the entry ID you're searching for. heads up tho: it's used only for v2.1 binaries ⭐

✨ DESCRIPTION ✨

okay so here's what happens. it reads the firmware header version and then dispatches to the appropriate v2.x parser — like a little router, very organized, we love to see it 🧚

important vibe check: only major version 2 is supported. that's the rule, don't fight it 💀

and then the minor version is what picks the layout:

  • single-entry layout → that's v2.0 🌸
  • multi-entry directory layout → that's v2.1 🎀

that's the whole fork in the road. minor version decides, periodt 👑

🔥 RETURN 🔥

  • 0 — success, slay, we ate 💖
  • -EINVAL — bestie… something went wrong. this is your error if:
    • the version is unsupported 😭
    • the requested pptable can't be found 🙈
    • the requested pptable exceeds the binary bounds (aka it's trying to escape the blob, not today 💀)

👑 SEE ALSO 👑

the source file for this one, ngl you should probably peek at it:

Kernel file ./drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c

and the whole friend group of related calls, all of them iconic in their own way 🌈:

fr fr, if you're getting -EINVAL and you swear the pptable exists, double-check that major version 2 thing. it's almost always that. iykyk 🫶

okay that's the page!! this came out of ./drivers/gpu/drm/amd/pm/swsmu, dated October 2026 — bookmark it, screenshot it, send it to the group chat, whatever you gotta do. mwah 💋 go be amazing with your pptables ✨💜

📦 where this page comes from