pdc_mb_init(9)

💅 pdc_mb_init(9) 💅

okay so welcome to the Kernel API Manual bestie, this page is literally all about pdc_mb_init and we're gonna get you so comfy with it 🫶

---

🌸 NAME 🌸

pdc_mb_init — initialize the mailbox controller ✨

---

🦋 SYNOPSIS 🦋

int pdc_mb_init (struct pdc_state *pdcs );

like, that's the whole signature, no cap 💅

---

🎀 ARGUMENTS 🎀

• pdcs — the PDC state 👑 that's it, that's the whole argument

---

💖 DESCRIPTION 💖

okay so here's the vibe 🌈: each PDC is a mailbox controller, and each ringset is a mailbox channel. iconic setup tbh.

the kernel driver? only uses one ringset, so consequently one mb channel — the driver is monogamous with its ringset, we respect that 🙈💀

and PDC uses the transmit complete interrupt to figure out when a mailbox message has successfully been transmitted 😭 like it literally waits for the interrupt to tell it "yeah babe it went through" ✨ periodt.

---

⭐ RETURN ⭐

• 0 on success 🎉 slay
• < 0 if there is an allocation or registration failure 💀 not slay

---

🔥 SEE ALSO 🔥

kernel file ./drivers/mailbox/bcm-pdc-mailbox.c — go read it, iykyk 👑

• pdc_setup_debugfs(9)
• pdc_build_rxd(9)
• pdc_build_txd(9)
• pdc_receive_one(9)
• pdc_receive(9)
• pdc_tx_list_sg_add(9)
• pdc_tx_list_final(9)
• pdc_rx_list_init(9)
• pdc_rx_list_sg_add(9)
• pdc_irq_handler(9)
• pdc_work_cb(9)
• pdc_ring_init(9)
• pdc_desc_count(9)
• pdc_rings_full(9)
• pdc_last_tx_done(9)
• pdc_send_data(9)
• pdc_hw_init(9)
• pdc_hw_disable(9)
• pdc_rx_buf_pool_create(9)
• pdc_interrupts_init(9)
• pdc_dt_read(9)
• pdc_probe(9)

---

and that's the whole page bestie 💜 this lil gem lives in ./drivers/mailbox and it's dated October 2026 🗓️✨ mwah, go forth and init some mailboxes 🧚💖