uaudio_populate_uac_desc(9)

okay bestie, you're looking at uaudio_populate_uac_desc(9) from the Kernel API Manual 💖 this one is lowkey a tiny but important lil parser, and we're gonna get into it.

🌸 NAME 🌸

uaudio_populate_uac_desc — parse UAC parameters and populate QMI resp

✨ SYNOPSIS ✨

int uaudio_populate_uac_desc (struct snd_usb_substream *subs , struct qmi_uaudio_stream_resp_msg_v01 *resp );

🎀 ARGUMENTS 🎀

• subs — usb substream
• resp — QMI response buffer

🦋 DESCRIPTION 🦋

So basically this function parses the info specified inside the UAC descriptors — those are the descriptors that explain the sample parameters the device expects 👀✨

Then that info gets populated into the QMI response that's sent back to the audio DSP. it's giving "translate the descriptor tea into QMI response tea" and honestly? iconic 💅

💜 SEE ALSO 💜

Kernel file: ./sound/usb/qcom/qc_audio_offload.c

• uaudio_iommu_unmap(9)
• uaudio_iommu_map_pa(9)
• uaudio_dev_intf_cleanup(9)
• uaudio_event_ring_cleanup_free(9)
• disable_audio_stream(9)
• uaudio_sideband_notifier(9)
• qmi_bye_cb(9)
• qmi_svc_disconnect_cb(9)
• enable_audio_stream(9)
• uaudio_transfer_buffer_setup(9)
• uaudio_endpoint_setup(9)
• uaudio_event_ring_setup(9)
• prepare_qmi_response(9)
• handle_uaudio_stream_req(9)
• qc_usb_audio_offload_init_qmi_dev(9)
• qc_usb_audio_offload_probe(9)
• qc_usb_audio_cleanup_qmi_dev(9)
• qc_usb_audio_offload_disconnect(9)
• qc_usb_audio_offload_suspend(9)

and that's the whole page, bestie 🫶 cute lil sign-off: source/version is ./sound/usb/qcom, date is October 2026, and the page is uaudio_populate_uac_desc(9) 💖✨