root/sound/soc/sof/intel/hda-codec.c

DEFINITIONS

1. hda_codec_load_module
2. hda_codec_jack_wake_enable
3. hda_codec_jack_check
4. hda_codec_jack_wake_enable
5. hda_codec_jack_check
6. hda_codec_probe
7. hda_codec_probe_bus
8. hda_codec_i915_get
9. hda_codec_i915_put
10. hda_codec_i915_init
11. hda_codec_i915_exit

   1 // SPDX-License-Identifier: (GPL-2.0 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 // Authors: Keyon Jie <yang.jie@linux.intel.com>
   9 //
  10 
  11 #include <linux/module.h>
  12 #include <sound/hdaudio_ext.h>
  13 #include <sound/hda_register.h>
  14 #include <sound/hda_codec.h>
  15 #include <sound/hda_i915.h>
  16 #include <sound/sof.h>
  17 #include "../ops.h"
  18 #include "hda.h"
  19 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  20 #include "../../codecs/hdac_hda.h"
  21 #endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
  22 
  23 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  24 #define IDISP_VID_INTEL 0x80860000
  25 
  26 /* load the legacy HDA codec driver */
  27 static int hda_codec_load_module(struct hda_codec *codec)
  28 {
  29 #ifdef MODULE
  30         char alias[MODULE_NAME_LEN];
  31         const char *module = alias;
  32 
  33         snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
  34         dev_dbg(&codec->core.dev, "loading codec module: %s\n", module);
  35         request_module(module);
  36 #endif
  37         return device_attach(hda_codec_dev(codec));
  38 }
  39 
  40 /* enable controller wake up event for all codecs with jack connectors */
  41 void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev)
  42 {
  43         struct hda_bus *hbus = sof_to_hbus(sdev);
  44         struct hdac_bus *bus = sof_to_bus(sdev);
  45         struct hda_codec *codec;
  46         unsigned int mask = 0;
  47 
  48         list_for_each_codec(codec, hbus)
  49                 if (codec->jacktbl.used)
  50                         mask |= BIT(codec->core.addr);
  51 
  52         snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
  53 }
  54 
  55 /* check jack status after resuming from suspend mode */
  56 void hda_codec_jack_check(struct snd_sof_dev *sdev)
  57 {
  58         struct hda_bus *hbus = sof_to_hbus(sdev);
  59         struct hdac_bus *bus = sof_to_bus(sdev);
  60         struct hda_codec *codec;
  61 
  62         /* disable controller Wake Up event*/
  63         snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, 0);
  64 
  65         list_for_each_codec(codec, hbus)
  66                 /*
  67                  * Wake up all jack-detecting codecs regardless whether an event
  68                  * has been recorded in STATESTS
  69                  */
  70                 if (codec->jacktbl.used)
  71                         schedule_delayed_work(&codec->jackpoll_work,
  72                                               codec->jackpoll_interval);
  73 }
  74 #else
  75 void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev) {}
  76 void hda_codec_jack_check(struct snd_sof_dev *sdev) {}
  77 #endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
  78 EXPORT_SYMBOL(hda_codec_jack_wake_enable);
  79 EXPORT_SYMBOL(hda_codec_jack_check);
  80 
  81 /* probe individual codec */
  82 static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
  83 {
  84 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  85         struct hdac_hda_priv *hda_priv;
  86 #endif
  87         struct hda_bus *hbus = sof_to_hbus(sdev);
  88         struct hdac_device *hdev;
  89         u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
  90                 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
  91         u32 resp = -1;
  92         int ret;
  93 
  94         mutex_lock(&hbus->core.cmd_mutex);
  95         snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
  96         snd_hdac_bus_get_response(&hbus->core, address, &resp);
  97         mutex_unlock(&hbus->core.cmd_mutex);
  98         if (resp == -1)
  99                 return -EIO;
 100         dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
 101                 address, resp);
 102 
 103 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
 104         hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
 105         if (!hda_priv)
 106                 return -ENOMEM;
 107 
 108         hda_priv->codec.bus = hbus;
 109         hdev = &hda_priv->codec.core;
 110 
 111         ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
 112         if (ret < 0)
 113                 return ret;
 114 
 115         /* use legacy bus only for HDA codecs, idisp uses ext bus */
 116         if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) {
 117                 hdev->type = HDA_DEV_LEGACY;
 118                 ret = hda_codec_load_module(&hda_priv->codec);
 119                 /*
 120                  * handle ret==0 (no driver bound) as an error, but pass
 121                  * other return codes without modification
 122                  */
 123                 if (ret == 0)
 124                         ret = -ENOENT;
 125         }
 126 
 127         return ret;
 128 #else
 129         hdev = devm_kzalloc(sdev->dev, sizeof(*hdev), GFP_KERNEL);
 130         if (!hdev)
 131                 return -ENOMEM;
 132 
 133         ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
 134 
 135         return ret;
 136 #endif
 137 }
 138 
 139 /* Codec initialization */
 140 int hda_codec_probe_bus(struct snd_sof_dev *sdev)
 141 {
 142         struct hdac_bus *bus = sof_to_bus(sdev);
 143         int i, ret;
 144 
 145         /* probe codecs in avail slots */
 146         for (i = 0; i < HDA_MAX_CODECS; i++) {
 147 
 148                 if (!(bus->codec_mask & (1 << i)))
 149                         continue;
 150 
 151                 ret = hda_codec_probe(sdev, i);
 152                 if (ret < 0) {
 153                         dev_err(bus->dev, "error: codec #%d probe error, ret: %d\n",
 154                                 i, ret);
 155                         return ret;
 156                 }
 157         }
 158 
 159         return 0;
 160 }
 161 EXPORT_SYMBOL(hda_codec_probe_bus);
 162 
 163 #if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
 164 
 165 void hda_codec_i915_get(struct snd_sof_dev *sdev)
 166 {
 167         struct hdac_bus *bus = sof_to_bus(sdev);
 168 
 169         dev_dbg(bus->dev, "Turning i915 HDAC power on\n");
 170         snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
 171 }
 172 EXPORT_SYMBOL(hda_codec_i915_get);
 173 
 174 void hda_codec_i915_put(struct snd_sof_dev *sdev)
 175 {
 176         struct hdac_bus *bus = sof_to_bus(sdev);
 177 
 178         dev_dbg(bus->dev, "Turning i915 HDAC power off\n");
 179         snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 180 }
 181 EXPORT_SYMBOL(hda_codec_i915_put);
 182 
 183 int hda_codec_i915_init(struct snd_sof_dev *sdev)
 184 {
 185         struct hdac_bus *bus = sof_to_bus(sdev);
 186         int ret;
 187 
 188         /* i915 exposes a HDA codec for HDMI audio */
 189         ret = snd_hdac_i915_init(bus);
 190         if (ret < 0)
 191                 return ret;
 192 
 193         hda_codec_i915_get(sdev);
 194 
 195         return 0;
 196 }
 197 EXPORT_SYMBOL(hda_codec_i915_init);
 198 
 199 int hda_codec_i915_exit(struct snd_sof_dev *sdev)
 200 {
 201         struct hdac_bus *bus = sof_to_bus(sdev);
 202         int ret;
 203 
 204         hda_codec_i915_put(sdev);
 205 
 206         ret = snd_hdac_i915_exit(bus);
 207 
 208         return ret;
 209 }
 210 EXPORT_SYMBOL(hda_codec_i915_exit);
 211 
 212 #endif /* CONFIG_SND_SOC_HDAC_HDMI */
 213 
 214 MODULE_LICENSE("Dual BSD/GPL");