xilinx_dpdma_chan_done_irq(9)

💖 xilinx_dpdma_chan_done_irq(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — yes we're reading kernel docs together, that's the vibe now, we're those girls 🎀

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🌸 NAME 🌸

xilinx_dpdma_chan_done_irq — literally here to Handle hardware descriptor completion 💅

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🦋 SYNOPSIS 🦋

void xilinx_dpdma_chan_done_irq (struct xilinx_dpdma_chan *chan );

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✨ ARGUMENTS ✨

• chan — the DPDMA channel in question, your main character 🫶

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💜 DESCRIPTION 💜

so what this does is Handle completion of the currently active descriptor, and that descriptor is chan->desc.active — like, that's the one, the chosen one 👑

and here's the thing: As we currently support cyclic transfers only, this just invokes the cyclic callback 🔁 that's it, that's the whole job, no cap.

and when does the descriptor actually get completed-completed? The descriptor will be completed at the VSYNC interrupt when a new descriptor replaces it ⭐ like the new one shows up and the old one gets its moment. iconic behaviour honestly.

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🎀 SEE ALSO 🎀

• Kernel file ./drivers/dma/xilinx/xilinx_dpdma.c

and all the fam, go say hi 💖:

• struct xilinx_dpdma_hw_desc(9)
• struct xilinx_dpdma_sw_desc(9)
• struct xilinx_dpdma_tx_desc(9)
• struct xilinx_dpdma_chan(9)
• struct xilinx_dpdma_device(9)
• xilinx_dpdma_sw_desc_set_dma_addrs(9)
• xilinx_dpdma_chan_alloc_sw_desc(9)
• xilinx_dpdma_chan_free_sw_desc(9)
• xilinx_dpdma_chan_dump_tx_desc(9)
• xilinx_dpdma_chan_alloc_tx_desc(9)
• xilinx_dpdma_chan_free_tx_desc(9)
• xilinx_dpdma_chan_prep_cyclic(9)
• xilinx_dpdma_chan_prep_interleaved_dma(9)
• xilinx_dpdma_chan_enable(9)
• xilinx_dpdma_chan_disable(9)
• xilinx_dpdma_chan_pause(9)
• xilinx_dpdma_chan_unpause(9)
• xilinx_dpdma_chan_queue_transfer(9)
• xilinx_dpdma_chan_ostand(9)
• xilinx_dpdma_chan_notify_no_ostand(9)
• xilinx_dpdma_chan_wait_no_ostand(9)
• xilinx_dpdma_chan_poll_no_ostand(9)
• xilinx_dpdma_chan_stop(9)
• xilinx_dpdma_chan_vsync_irq(9)
• xilinx_dpdma_chan_err(9)
• xilinx_dpdma_chan_handle_err(9)
• xilinx_dpdma_alloc_chan_resources(9)
• xilinx_dpdma_free_chan_resources(9)
• xilinx_dpdma_terminate_all(9)
• xilinx_dpdma_synchronize(9)
• xilinx_dpdma_err(9)
• xilinx_dpdma_handle_err_irq(9)
• xilinx_dpdma_enable_irq(9)
• xilinx_dpdma_disable_irq(9)
• xilinx_dpdma_chan_err_task(9)

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live from ./drivers/dma/xilinx, dated October 2026 — mwah, that's the whole page bestie, go read the source, ily 💋🌈