LXR linux/sound/soc/sof/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. 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, 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        sof_pdata->fw_filename = desc->default_fw_filename;
  78
  79        /* alternate fw and tplg filenames ? */
  80        if (fw_path)
  81                sof_pdata->fw_filename_prefix = fw_path;
  82        else
  83                sof_pdata->fw_filename_prefix =
  84                        sof_pdata->desc->default_fw_path;
  85
  86        if (tplg_path)
  87                sof_pdata->tplg_filename_prefix = tplg_path;
  88        else
  89                sof_pdata->tplg_filename_prefix =
  90                        sof_pdata->desc->default_tplg_path;
  91
  92        /* set callback to be called on successful device probe to enable runtime_pm */
  93        sof_pdata->sof_probe_complete = sof_acpi_probe_complete;
  94
  95        /* call sof helper for DSP hardware probe */
  96        return snd_sof_device_probe(dev, sof_pdata);
  97}
  98EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV);
  99
 100int sof_acpi_remove(struct platform_device *pdev)
 101{
 102        struct device *dev = &pdev->dev;
 103
 104        if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
 105                pm_runtime_disable(dev);
 106
 107        /* call sof helper for DSP hardware remove */
 108        snd_sof_device_remove(dev);
 109
 110        return 0;
 111}
 112EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV);
 113
 114MODULE_LICENSE("Dual BSD/GPL");
 115