cmdq_pkt_assign(9)

💖 cmdq_pkt_assign(9) — like, the Kernel API Manual glow-up 💖

okay so bestie, this one lives in the Kernel API Manual and it's basically the "write a number into a register" era of your CMDQ journey. Let's get into it ✨

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🌸 NAME 🌸

cmdq_pkt_assign — appends a logic assign command to the CMDQ packet, which asks the GCE to execute an instruction that sets a constant value into an internal register, and then that thing gets used as a value, a mask, or an address in a read/write instruction. iykyk 🔥

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🦋 SYNOPSIS 🦋

int cmdq_pkt_assign (struct cmdq_pkt *pkt , u16 reg_idx , u32 value );

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🎀 ARGUMENTS 🎀

• pkt — the CMDQ packet 💌 (the thing you're stuffing the command into)
• reg_idx — the CMDQ internal register ID, like the little locker number you're writing into 🗄️
• value — the specified value, aka the actual number that goes in there ⭐

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👑 RETURN 👑

Returns 0 for success — slay 💅 — otherwise the error code is returned, so, y'know, vibe check your return value fr fr.

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🌈 SEE ALSO 🌈

Kernel file ./include/linux/soc/mediatek/mtk-cmdq.h — go read it, it's giving source of truth 📖

and the whole friend group: cmdq_dev_get_client_reg(9), cmdq_mbox_create(9), cmdq_mbox_destroy(9), cmdq_pkt_create(9), cmdq_pkt_destroy(9), cmdq_pkt_write(9), cmdq_pkt_write_pa(9), cmdq_pkt_write_subsys(9), cmdq_pkt_write_mask(9), cmdq_pkt_write_mask_pa(9), cmdq_pkt_write_mask_subsys(9), cmdq_pkt_write_s(9), cmdq_pkt_write_s_mask(9),

cmdq_pkt_write_s_value(9), cmdq_pkt_write_s_mask_value(9), cmdq_pkt_mem_move(9), cmdq_pkt_wfe(9), cmdq_pkt_acquire_event(9), cmdq_pkt_clear_event(9), cmdq_pkt_set_event(9), cmdq_pkt_poll(9), cmdq_pkt_poll_mask(9), cmdq_pkt_logic_command(9), cmdq_pkt_poll_addr(9),

cmdq_pkt_jump_abs(9), cmdq_pkt_jump_rel(9), cmdq_pkt_jump_rel_temp(9), cmdq_pkt_eoc(9) 💀 (yes that's all of them, I counted, no cap)

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ok that's the whole page bestie, every flag, every name, every reference — nothing skipped, periodt 🫶

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and before you go — this lil page came from ./include/linux/soc/mediatek, dated October 2026, and its whole identity is cmdq_pkt_assign(9). mwah, go write some registers 💜🧚