sprd_mcdt_chan_read(9)

💖 sprd_mcdt_chan_read(9) — like, the whole glow-up

okay so bestie, welcome to the Kernel API Manual ✨ this one's about sprd_mcdt_chan_read(9), and yes it's exactly as niche and exactly as iconic as it sounds 💅

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🌸 NAME 🌸

sprd_mcdt_chan_read — read data from the MCDT channel's fifo 🎀

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✨ SYNOPSIS ✨

int sprd_mcdt_chan_read (struct sprd_mcdt_chan *chan , char *rx_buf ,
u32 size );

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🦋 ARGUMENTS 🦋

• chan — the MCDT channel 👑 like, the one you're reading from, no cap
• rx_buf — receive buffer 🫶 this is where the data lands, bestie
• size — data size 🍓 how much you're asking for

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💅 NOTE 💅

⚠️ ok so this is the part where you do not play yourself: we can not read data from the channel fifo when enabling the DMA mode 😭 do that and the reading data will be invalid. literally invalid. don't do it, fr fr.

usually user need start to read data once receiving the fifo full interrupt ✨ (that's the vibe — wait for the fifo full interrupt, then go 💫)

returns data size of reading successfully, or an error code on failure 🔥 so check your return value, bestie, it's giving "I might fail" energy 🙈

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🌈 SEE ALSO 🌈

kernel file ./sound/soc/sprd/sprd-mcdt.c — and the whole friend group 🫶:

• sprd_mcdt_chan_write(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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and that's the page, bestie 💖 brought to you by the fine folks over at ./sound/soc/sprd, Kernel API Manual, October 2026 ⭐ slay, read responsibly, mwah 🎀