sof-acpi-dev.c

  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");