ks_pcie_set_dbi_mode(9)

✨ ks_pcie_set_dbi_mode ✨

okay so this is a page straight out of the Kernel API Manual, and it's about one tiny little function that does one tiny little thing, but bestie it's important. Let's get into it 💅

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🌸 NAME 🌸

ks_pcie_set_dbi_mode — literally just sets the DBI mode so you can access the overlaid BAR mask registers. that's the whole vibe. ✨

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🦋 SYNOPSIS 🦋

void ks_pcie_set_dbi_mode (struct keystone_pcie *ks_pcie );

no return value, no drama, it's a void. she simply shows up, does the thing, and leaves. main character energy tbh 👑

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🎀 ARGUMENTS 🎀

• ks_pcie — a pointer to the keystone_pcie structure, which is the thing holding all the KeyStone PCIe host controller driver info. like her little purse full of everything she needs 🫶

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💖 DESCRIPTION 💖

so here's the situation, bestie: modification of dbi_cs2 involves a different clock domain, right? which means you can't just assume it happened instantly and move on with your life. nope. you have to read the status back to make sure the transition is actually, fully, completely done. no cap, that's the entire point — verify the transition is complete before you go anywhere. ⏳✨

like texting someone and then waiting for the read receipt. you gotta check. 🙈

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pci/controller/dwc/pci-keystone.c
• ks_pcie_clear_dbi_mode(9) — the opposite-energy bestie 💜
• ks_pcie_link_up(9)
• ks_pcie_intx_irq_handler(9)

iykyk, these four are the squad 🌈

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that's it, that's the page. short and iconic, just like her ⭐

with love from ./drivers/pci/controller/dwc, dated October 2026 — mwah, bye bestie 🍓💅