Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
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, "deprecated - moved to snd-sof module.");
28
29static char *tplg_path;
30module_param(tplg_path, charp, 0444);
31MODULE_PARM_DESC(tplg_path, "deprecated - moved to snd-sof module.");
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
39EXPORT_NS_DEV_PM_OPS(sof_acpi_pm, SND_SOC_SOF_ACPI_DEV) = {
40 SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
41 RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
42 snd_sof_runtime_idle)
43};
44
45static void sof_acpi_probe_complete(struct device *dev)
46{
47 dev_dbg(dev, "Completing SOF ACPI probe");
48
49 if (sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME)
50 return;
51
52 /* allow runtime_pm */
53 pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
54 pm_runtime_use_autosuspend(dev);
55 pm_runtime_enable(dev);
56}
57
58int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc)
59{
60 struct device *dev = &pdev->dev;
61 struct snd_sof_pdata *sof_pdata;
62
63 dev_dbg(dev, "ACPI DSP detected");
64
65 sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
66 if (!sof_pdata)
67 return -ENOMEM;
68
69 if (!desc->ops) {
70 dev_err(dev, "error: no matching ACPI descriptor ops\n");
71 return -ENODEV;
72 }
73
74 sof_pdata->desc = desc;
75 sof_pdata->dev = &pdev->dev;
76
77 sof_pdata->ipc_file_profile_base.ipc_type = desc->ipc_default;
78 sof_pdata->ipc_file_profile_base.fw_path = fw_path;
79 sof_pdata->ipc_file_profile_base.tplg_path = tplg_path;
80
81 /* set callback to be called on successful device probe to enable runtime_pm */
82 sof_pdata->sof_probe_complete = sof_acpi_probe_complete;
83
84 /* call sof helper for DSP hardware probe */
85 return snd_sof_device_probe(dev, sof_pdata);
86}
87EXPORT_SYMBOL_NS(sof_acpi_probe, "SND_SOC_SOF_ACPI_DEV");
88
89void sof_acpi_remove(struct platform_device *pdev)
90{
91 struct device *dev = &pdev->dev;
92
93 if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
94 pm_runtime_disable(dev);
95
96 /* call sof helper for DSP hardware remove */
97 snd_sof_device_remove(dev);
98}
99EXPORT_SYMBOL_NS(sof_acpi_remove, "SND_SOC_SOF_ACPI_DEV");
100
101MODULE_LICENSE("Dual BSD/GPL");
102MODULE_DESCRIPTION("SOF support for ACPI platforms");