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
  25 static char *fw_path;
  26 module_param(fw_path, charp, 0444);
  27 MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
  28
  29 static char *tplg_path;
  30 module_param(tplg_path, charp, 0444);
  31 MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
  32
  33 static int sof_acpi_debug;
  34 module_param_named(sof_acpi_debug, sof_acpi_debug, int, 0444);
  35 MODULE_PARM_DESC(sof_acpi_debug, "SOF ACPI debug options (0x0 all off)");
  36
  37 #define SOF_ACPI_DISABLE_PM_RUNTIME BIT(0)
  38
  39 const 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 };
  44 EXPORT_SYMBOL_NS(sof_acpi_pm, SND_SOC_SOF_ACPI_DEV);
  45
  46 static 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
  59 int 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[SOF_IPC];
  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[SOF_IPC];
  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[SOF_IPC];
  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 }
  98 EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV);
  99
 100 int 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 }
 112 EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV);
 113
 114 MODULE_LICENSE("Dual BSD/GPL");