ENUM MTK_PCIE_QUIRKS(9)

✨ NAME ✨

enum mtk_pcie_quirks — MTK PCIe quirks, aka the little list of "hey this silicon is a lil special" flags 💅

okay so real talk, this is from the Kernel API Manual, and it's basically a cheat sheet of workarounds for MediaTek PCIe host controllers that don't quite behave like the textbook says they should 🫶

🌸 SYNOPSIS 🌸

enum mtk_pcie_quirks {
    MTK_PCIE_FIX_CLASS_ID ,
    MTK_PCIE_FIX_DEVICE_ID ,
    MTK_PCIE_NO_MSI ,
    MTK_PCIE_SKIP_RSTB ,
    MTK_PCIE_RETRAIN

};

literally just an enum, bestie, five constants, no cap 🎀

🌈 Constants 🌈

okay so here's the vibe check on each one 👑

• MTK_PCIE_FIX_CLASS_ID — the host's class ID needed to be fixed. yeah. it's wrong. we're fixing it. moving on 😭
• MTK_PCIE_FIX_DEVICE_ID — same energy, but for the host's device ID — it needed to be fixed too 🔧
• MTK_PCIE_NO_MSI — the bridge has no MSI support and relies on an external block. so like, don't come for it about MSI, it's doing its best 🙈
• MTK_PCIE_SKIP_RSTB — skip calling RSTB bits on PCIe probe. we just… don't touch those bits. iconic behavior honestly ⭐
• MTK_PCIE_RETRAIN — retrain the link to the bridge after startup, because some Gen2-capable devices start as Gen1. they wake up in the wrong era and we gotta gently nudge them into the present 🦋

🎀 SEE ALSO 🎀

• Kernel file ./drivers/pci/controller/pcie-mediatek.c
• struct mtk_pcie_soc(9)
• struct mtk_pcie_port(9)
• struct mtk_pcie(9)
• mtk_pcie_retrain(9)

k that's the whole page, go read the source if you want the lore 💀

and that's a wrap, bestie 💖 this one's filed under ./drivers/pci/controller, dated October 2026 — the enum mtk_pcie_quirks(9) era. slay 🌟