sound/soc/qcom/usb_offload_utils.c
Source file repositories/reference/linux-study-clean/sound/soc/qcom/usb_offload_utils.c
File Facts
- System
- Linux kernel
- Corpus path
sound/soc/qcom/usb_offload_utils.c- Extension
.c- Size
- 1358 bytes
- Lines
- 57
- Domain
- Driver Families
- Bucket
- sound/soc
- Inferred role
- Driver Families: exported/initcall integration point
- Status
- integration implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
dt-bindings/sound/qcom,q6afe.hlinux/module.hsound/jack.hsound/soc-usb.husb_offload_utils.h
Detected Declarations
function Copyrightfunction qcom_snd_usb_offload_jack_removeexport qcom_snd_usb_offload_jack_setupexport qcom_snd_usb_offload_jack_remove
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <dt-bindings/sound/qcom,q6afe.h>
#include <linux/module.h>
#include <sound/jack.h>
#include <sound/soc-usb.h>
#include "usb_offload_utils.h"
int qcom_snd_usb_offload_jack_setup(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_jack *jack, bool *jack_setup)
{
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
int ret = 0;
if (cpu_dai->id != USB_RX)
return -EINVAL;
if (!*jack_setup) {
ret = snd_soc_usb_setup_offload_jack(codec_dai->component, jack);
if (ret)
return ret;
}
*jack_setup = true;
return 0;
}
EXPORT_SYMBOL_GPL(qcom_snd_usb_offload_jack_setup);
int qcom_snd_usb_offload_jack_remove(struct snd_soc_pcm_runtime *rtd,
bool *jack_setup)
{
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
int ret = 0;
if (cpu_dai->id != USB_RX)
return -EINVAL;
if (*jack_setup) {
ret = snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
if (ret)
return ret;
}
*jack_setup = false;
return 0;
}
EXPORT_SYMBOL_GPL(qcom_snd_usb_offload_jack_remove);
MODULE_DESCRIPTION("ASoC Q6 USB offload controls");
MODULE_LICENSE("GPL");
Annotation
- Immediate include surface: `dt-bindings/sound/qcom,q6afe.h`, `linux/module.h`, `sound/jack.h`, `sound/soc-usb.h`, `usb_offload_utils.h`.
- Detected declarations: `function Copyright`, `function qcom_snd_usb_offload_jack_remove`, `export qcom_snd_usb_offload_jack_setup`, `export qcom_snd_usb_offload_jack_remove`.
- Atlas domain: Driver Families / sound/soc.
- Implementation status: integration implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.