snd_pcm_fill...958_consumer(9)

💅 snd_pcm_fill_iec958_consumer(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's a lil function from the kernel's sound corner and honestly it's giving "small but crucial" energy. let's get into it 🎀

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✨ NAME ✨

snd_pcm_fill_iec958_consumer — fills up the consumer-format IEC958 channel status, no cap 🫶

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🌸 SYNOPSIS 🌸

int snd_pcm_fill_iec958_consumer (struct snd_pcm_runtime *runtime , u8
*cs , size_t len );

like, look at that signature. she's little. she's mighty. 💅

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🦋 ARGUMENTS 🦋

• runtime — the pcm runtime structure, and it has to have ->rate filled in already. like pls fill in your rate first, it's literally the whole vibe check 🔥
• cs — the channel status buffer. needs to be at least four bytes, ok? don't come at her with a tiny buffer 🙈
• len — the length of that channel status buffer. she needs to know how much room she's working with, periodt 💖

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⭐ DESCRIPTION ⭐

so what she does is: she fills in the unspecified bits in an IEC958 status bits array, using the parameters from the PCM runtime runtime. that's it, that's the job, and she does it well 👑

drivers may wish to tweak the contents of the buffer after it's been filled — like, she hands you the buffer and you can go in there and adjust stuff afterwards, that's totally allowed, it's giving collaborative 💜

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🌈 RETURN 🌈

returns the length of the buffer 🎀 or a negative error code if something failed 😭 (yes, negative, so check it, i'm begging you)

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🧚 SEE ALSO 🧚

• Kernel file ./sound/core/pcm_iec958.c
• snd_pcm_create_iec958_consumer_default(9)
• snd_pcm_fill_iec958_consumer_hw_params(9)
• snd_pcm_create_iec958_consumer(9)
• snd_pcm_create_iec958_consumer_hw_params(9)

like the whole iec958 friend group, they all hang out together 💕

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ngl this page lives in ./sound/core, dated October 2026, and it's filed under snd_pcm_fill...958_consumer(9) — so if you need her again she's right there in the kernel API manual, slaying 💅✨🌸