STRUCT S3C_PCM_INFO(9)

🎀 struct s3c_pcm_info(9) 🎀

okay bestie, welcome to the Kernel API Manual entry for struct s3c_pcm_info — which is, and I cannot stress this enough, the S3C PCM Controller information</> struct. it's giving "audio-bus bookkeeping" and honestly? we're obsessed. 💅

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✨ NAME ✨

struct s3c_pcm_info — S3C PCM Controller information 🎧✨

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🌸 SYNOPSIS 🌸

struct s3c_pcm_info {
    spinlock_t lock;
    struct device   *dev;
    void __iomem    *regs;
    unsigned int sclk_per_fs;
    unsigned int idleclk;
    struct clk      *pclk;
    struct clk      *cclk;
    struct snd_dmaengine_dai_dma_data *dma_playback;
    struct snd_dmaengine_dai_dma_data *dma_capture;
 };

like, look at her. nine whole members. she's structured. she's organized. she's literally the main character of ./sound/soc/samsung/pcm.c. 🫶

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💖 Members 💖

• lock — a spin lock, bestie. classic. keeps things from stepping on each other. 🔒
• dev — the parent device, passed in to use from the probe. it's the whole reason we're here, ngl.
• regs — the pointer to the device register block. the address of the vibes. 📍
• sclk_per_fs — number of sclk per frame sync. yeah. that many. 🎵
• idleclk — whether to keep PCMSCLK enabled even when idle (no active xfer). so like, does the clock stay awake even when nothing's transferring? that's what this says. ⏰
• pclk — the PCLK_PCM (pcm) clock pointer. she's the pcm clock. periodt. 🕰️
• cclk — the SCLK_AUDIO (audio-bus) clock pointer. different girl, different bus. 🌈
• dma_playback — DMA information for the playback channel. sound goes OUT. 🔊
• dma_capture — DMA information for the capture channel. sound comes IN. 🎙️

ngl these two struct snd_dmaengine_dai_dma_data * pointers are highkey the most extra types in the whole struct and I respect it.

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🦋 SEE ALSO 🦋

• Kernel file ./sound/soc/samsung/pcm.c 👀 go read her, she's iconic.

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✨ cute lil sign-off ✨

this came from ./sound/soc/samsung, dated October 2026 💜 and it's titled struct s3c_pcm_info(9) in case you forgot already (you didn't, you're doing amazing, bestie). go forth and slay your PCM controller setup. 🎀🔥👑