snd_hdac_stream_drsm_enable(9)

💅 snd_hdac_stream_drsm_enable(9) — like, the kernel API manual edition 🎀

okay bestie, so this is a page straight out of the Kernel API Manual, and it's about one single function: snd_hdac_stream_drsm_enable. that's it. that's the whole vibe. it turns DMA resume on (or off) for a stream, and honestly? iconic of it. ✨

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✨ NAME ✨

snd_hdac_stream_drsm_enable — enable DMA resume for a stream 🦋

like, literally the entire job is flipping DRSM on for a stream. no cap.

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🌸 SYNOPSIS 🌸

void snd_hdac_stream_drsm_enable (struct hdac_bus *bus , bool enable ,
       int index );

she takes three things and she returns void, meaning she hands nothing back — she just does the thing and leaves. main character energy fr fr. 💅

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🎀 ARGUMENTS 🎀

here's the breakdown of what you're feeding her, bestie:

• bus — the HD-audio core bus. that's your HD-audio core bus right there. 🚌
• enable — the flag to enable/disable DRSM. so true-ish = turn it on, off-ish = turn it off. she's flexible like that. 🔥
• index — the stream index for which DRSM need to be enabled. yes, that stream. the one at that index. be normal about it. 🙈

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👑 SEE ALSO 👑

okay this is the part where she shouts out her whole friend group. every single one of them. no one gets left out, periodt. 💖

Kernel file ./sound/hda/core/stream.c and, in no particular order but also very much in this exact order:

snd_hdac_get_stream_stripe_ctl(9), snd_hdac_stream_init(9), snd_hdac_stream_start(9), snd_hdac_stream_clear(9), snd_hdac_stream_stop(9), snd_hdac_stop_streams(9), snd_hdac_stop_streams_and_chip(9), snd_hdac_stream_reset(9), snd_hdac_stream_setup(9), snd_hdac_stream_cleanup(9), snd_hdac_stream_assign(9), snd_hdac_stream_release_locked(9), snd_hdac_stream_release(9), snd_hdac_get_stream(9), snd_hdac_stream_setup_bdle(9), snd_hdac_stream_setup_periods(9), snd_hdac_stream_set_params(9), snd_hdac_stream_timecounter_init(9), snd_hdac_stream_sync_trigger(9), snd_hdac_stream_sync(9), snd_hdac_stream_spbcap_enable(9), snd_hdac_stream_set_spib(9), snd_hdac_stream_set_dpibr(9), snd_hdac_stream_set_lpib(9), snd_hdac_dsp_prepare(9), snd_hdac_dsp_trigger(9), snd_hdac_dsp_cleanup(9)

that's the whole squad. 💜

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ngl, go read those if you want the full lore — this page is just the one little enable-er. 🧚

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and that's the page!! 🫶 this little cutie lives in ./sound/hda/core and the version on deck is dated October 2026, so like… stay fresh, bestie. mwah. 💋🌈⭐