1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2//
3// This file is provided under a dual BSD/GPLv2 license. When using or
4// redistributing this file, you may do so under either license.
5//
6// Copyright(c) 2018 Intel Corporation. All rights reserved.
7//
8// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
9//
10
11#include <linux/acpi.h>
12#include <linux/firmware.h>
13#include <linux/module.h>
14#include <linux/pm_runtime.h>
15#include <sound/soc-acpi.h>
16#include <sound/soc-acpi-intel-match.h>
17#include <sound/sof.h>
18#include "../intel/common/soc-intel-quirks.h"
19#include "ops.h"
20#include "sof-acpi-dev.h"
21
22/* platform specific devices */
23#include "intel/shim.h"
24
25static char *fw_path;
26module_param(fw_path, charp, 0444);
27MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
28
29static char *tplg_path;
30module_param(tplg_path, charp, 0444);
31MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
32
33static int sof_acpi_debug;
34module_param_named(sof_acpi_debug, sof_acpi_debug, int, 0444);
35MODULE_PARM_DESC(sof_acpi_debug, "SOF ACPI debug options (0x0 all off)");
36
37#define SOF_ACPI_DISABLE_PM_RUNTIME BIT(0)
38
39const struct dev_pm_ops sof_acpi_pm = {
40 SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
41 SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
42 snd_sof_runtime_idle)
43};
44EXPORT_SYMBOL_NS(sof_acpi_pm, SND_SOC_SOF_ACPI_DEV);
45
46static void sof_acpi_probe_complete(struct device *dev)
47{
48 dev_dbg(dev, "Completing SOF ACPI probe");
49
50 if (sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME)
51 return;
52
53 /* allow runtime_pm */
54 pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
55 pm_runtime_use_autosuspend(dev);
56 pm_runtime_enable(dev);
57}
58
59int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc)
60{
61 struct device *dev = &pdev->dev;
62 struct snd_sof_pdata *sof_pdata;
63
64 dev_dbg(dev, "ACPI DSP detected");
65
66 sof_pdata = devm_kzalloc(dev, size: sizeof(*sof_pdata), GFP_KERNEL);
67 if (!sof_pdata)
68 return -ENOMEM;
69
70 if (!desc->ops) {
71 dev_err(dev, "error: no matching ACPI descriptor ops\n");
72 return -ENODEV;
73 }
74
75 sof_pdata->desc = desc;
76 sof_pdata->dev = &pdev->dev;
77
78 sof_pdata->ipc_file_profile_base.ipc_type = desc->ipc_default;
79 sof_pdata->ipc_file_profile_base.fw_path = fw_path;
80 sof_pdata->ipc_file_profile_base.tplg_path = tplg_path;
81
82 /* set callback to be called on successful device probe to enable runtime_pm */
83 sof_pdata->sof_probe_complete = sof_acpi_probe_complete;
84
85 /* call sof helper for DSP hardware probe */
86 return snd_sof_device_probe(dev, plat_data: sof_pdata);
87}
88EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV);
89
90void sof_acpi_remove(struct platform_device *pdev)
91{
92 struct device *dev = &pdev->dev;
93
94 if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
95 pm_runtime_disable(dev);
96
97 /* call sof helper for DSP hardware remove */
98 snd_sof_device_remove(dev);
99}
100EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV);
101
102MODULE_LICENSE("Dual BSD/GPL");
103

source code of linux/sound/soc/sof/sof-acpi-dev.c