sprd_mcdt_chan_write(9)

💅 sprd_mcdt_chan_write(9) 💅

okay bestie, welcome to the Kernel API Manual — we're talking about sprd_mcdt_chan_write(9) today and honestly it's giving “small function, very important fifo behavior.” let's get into it 🫶

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✨ NAME ✨

sprd_mcdt_chan_write — write data to the MCDT channel's fifo 💖

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🌸 SYNOPSIS 🌸

int sprd_mcdt_chan_write (struct sprd_mcdt_chan *chan , char *tx_buf ,
       u32 size );

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🎀 ARGUMENTS 🎀

• chan — the MCDT channel 👑
• tx_buf — send buffer 📤
• size — data size 🍓

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💅 NOTE 💅

bestie, please read this part before you start throwing data around:

⚠️ We can not write data to the channel fifo when enabling the DMA mode — otherwise the channel fifo data will be invalid. no cap, that's the rule 💀

• If there are not enough space of the channel fifo, it will return errors to users. 😭
• Returns 0 on success, or an appropriate error code on failure. ✨

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🔥 SEE ALSO 🔥

Kernel file ./sound/soc/sprd/sprd-mcdt.c — plus the whole squad:

• sprd_mcdt_chan_read(9)
• sprd_mcdt_chan_int_enable(9)
• sprd_mcdt_chan_int_disable(9)
• sprd_mcdt_chan_dma_enable(9)
• sprd_mcdt_chan_dma_disable(9)
• sprd_mcdt_request_chan(9)
• sprd_mcdt_free_chan(9)

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xoxo 💖 — from the Kernel API Manual, source ./sound/soc/sprd, dated October 2026, all about sprd_mcdt_chan_write(9). slay and read your fifo docs 🧚‍♀️