snd_pcm_fill...er_hw_params(9)

💖 NAME 💖

snd_pcm_fill_iec958_consumer_hw_params — okay so this one fills in the consumer format IEC958 channel status, bestie ✨

This is the Kernel API Manual, btw — yes we're in kernel-land today, put your big-girl hat on 👑

---

🎀 SYNOPSIS 🎀

int snd_pcm_fill_iec958_consumer_hw_params (struct snd_pcm_hw_params *params , u8 *cs , size_t len );

Like, that's the whole vibe. Three args, one int, no drama 💅

---

🦋 ARGUMENTS 🦋

• params — the hw_params instance, and literally its whole job here is extracting the rate and sample format. That's it, that's the girl 🌸
• cs — the channel status buffer. Needs to be at least four bytes, no cap. Don't be stingy with it 🙈
• len — length of the channel status buffer. Yes bestie, the length. Of the buffer. You got this 🫶

---

✨ DESCRIPTION ✨

So here's the tea, okay? This function fills the unspecified bits in an IEC958 status bits array — and it does that using the parameters from the PCM hardware parameters, aka params 🎚️✨

That's the whole thing. Unspecified bits get filled, using params, slay 💅

Heads up though: drivers may wish to tweak the contents of the buffer after its been filled.. 👀 So like, the buffer is yours to mess with afterwards, the kernel isn't gatekeeping. (Yes, the original has two dots. We don't fix it. We respect the two dots 😭)

---

🔥 RETURN 🔥

• The length of the buffer 💖
• or a negative error code if something failed 💀

Binary choice, honestly. Either it ate or it flopped 🔥/💀

---

🌈 SEE ALSO 🌈

• Kernel file ./sound/core/pcm_iec958.c — the source, go read it, iykyk 📖
• snd_pcm_create_iec958_consumer_default(9)
• snd_pcm_fill_iec958_consumer(9)
• snd_pcm_create_iec958_consumer(9)
• snd_pcm_create_iec958_consumer_hw_params(9)

Like the whole IEC958 friend group, fr fr 👑🦋

---

Okay that's the page, bestie — brought to you from ./sound/core, dated October 2026, and honestly? Iconic energy for a kernel function. Periodt. 💜🧚‍♀️