is_sdca_aux_dev_present(9)

okay so bestie, welcome to the is_sdca_aux_dev_present(9) page — it’s giving Kernel API Manual energy, and the whole point is checking if an SDCA aux device is present on the SDW peripheral 💅✨

🌸 NAME 🌸

is_sdca_aux_dev_present — check if an SDCA aux device is present on the SDW peripheral. no cap, that’s the whole name section 🎀

✨ SYNOPSIS ✨

the function signature, exactly as it lives:

int is_sdca_aux_dev_present (struct device *dev , const char
       *aux_codec_name , const struct snd_soc_acpi_link_adr *adr_link , int
       adr_index );

🦋 ARGUMENTS 🦋

• dev — Device pointer. literally the device pointer, bestie 🫶
• aux_codec_name — Aux codec name from the codec info (e.g. "snd_soc_sdca.HID.2"). yes, that exact example, keep it cute 💖
• adr_link — ACPI link address.
• adr_index — Index of the ACPI link address.

💀 RETURN 💀

so what does it hand back? 1 if the aux is present, 0 if the aux is not present, or a negative error code. periodt. ✨

🧚 SEE ALSO 🧚

if you’re going down the rabbit hole:

• Kernel file ./sound/soc/sdw_utils/soc_sdw_utils.c
• is_sdca_endpoint_present(9)

that’s the page, bestie 🫶 — source/version: ./sound/soc/sdw_utils; date: October 2026. mwah 💋🌈