LXR linux/sound/soc/sof/intel/hda-codec.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// 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#define CODEC_PROBE_RETRIES     3
  24
  25#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  26#define IDISP_VID_INTEL 0x80860000
  27
  28/* load the legacy HDA codec driver */
  29static int request_codec_module(struct hda_codec *codec)
  30{
  31#ifdef MODULE
  32        char alias[MODULE_NAME_LEN];
  33        const char *mod = NULL;
  34
  35        switch (codec->probe_id) {
  36        case HDA_CODEC_ID_GENERIC:
  37#if IS_MODULE(CONFIG_SND_HDA_GENERIC)
  38                mod = "snd-hda-codec-generic";
  39#endif
  40                break;
  41        default:
  42                snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
  43                mod = alias;
  44                break;
  45        }
  46
  47        if (mod) {
  48                dev_dbg(&codec->core.dev, "loading codec module: %s\n", mod);
  49                request_module(mod);
  50        }
  51#endif /* MODULE */
  52        return device_attach(hda_codec_dev(codec));
  53}
  54
  55static int hda_codec_load_module(struct hda_codec *codec)
  56{
  57        int ret = request_codec_module(codec);
  58
  59        if (ret <= 0) {
  60                codec->probe_id = HDA_CODEC_ID_GENERIC;
  61                ret = request_codec_module(codec);
  62        }
  63
  64        return ret;
  65}
  66
  67/* enable controller wake up event for all codecs with jack connectors */
  68void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable)
  69{
  70        struct hda_bus *hbus = sof_to_hbus(sdev);
  71        struct hdac_bus *bus = sof_to_bus(sdev);
  72        struct hda_codec *codec;
  73        unsigned int mask = 0;
  74
  75        if (enable) {
  76                list_for_each_codec(codec, hbus)
  77                        if (codec->jacktbl.used)
  78                                mask |= BIT(codec->core.addr);
  79        }
  80
  81        snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
  82}
  83
  84/* check jack status after resuming from suspend mode */
  85void hda_codec_jack_check(struct snd_sof_dev *sdev)
  86{
  87        struct hda_bus *hbus = sof_to_hbus(sdev);
  88        struct hda_codec *codec;
  89
  90        list_for_each_codec(codec, hbus)
  91                /*
  92                 * Wake up all jack-detecting codecs regardless whether an event
  93                 * has been recorded in STATESTS
  94                 */
  95                if (codec->jacktbl.used)
  96                        pm_request_resume(&codec->core.dev);
  97}
  98#else
  99void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable) {}
 100void hda_codec_jack_check(struct snd_sof_dev *sdev) {}
 101#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
 102EXPORT_SYMBOL_NS(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
 103EXPORT_SYMBOL_NS(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
 104
 105#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
 106#define is_generic_config(bus) \
 107        ((bus)->modelname && !strcmp((bus)->modelname, "generic"))
 108#else
 109#define is_generic_config(x)    0
 110#endif
 111
 112/* probe individual codec */
 113static int hda_codec_probe(struct snd_sof_dev *sdev, int address,
 114                           bool hda_codec_use_common_hdmi)
 115{
 116#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
 117        struct hdac_hda_priv *hda_priv;
 118        struct hda_codec *codec;
 119        int type = HDA_DEV_LEGACY;
 120#endif
 121        struct hda_bus *hbus = sof_to_hbus(sdev);
 122        struct hdac_device *hdev;
 123        u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
 124                (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
 125        u32 resp = -1;
 126        int ret, retry = 0;
 127
 128        do {
 129                mutex_lock(&hbus->core.cmd_mutex);
 130                snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
 131                snd_hdac_bus_get_response(&hbus->core, address, &resp);
 132                mutex_unlock(&hbus->core.cmd_mutex);
 133        } while (resp == -1 && retry++ < CODEC_PROBE_RETRIES);
 134
 135        if (resp == -1)
 136                return -EIO;
 137        dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
 138                address, resp);
 139
 140#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
 141        hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
 142        if (!hda_priv)
 143                return -ENOMEM;
 144
 145        hda_priv->codec.bus = hbus;
 146        hdev = &hda_priv->codec.core;
 147        codec = &hda_priv->codec;
 148
 149        /* only probe ASoC codec drivers for HDAC-HDMI */
 150        if (!hda_codec_use_common_hdmi && (resp & 0xFFFF0000) == IDISP_VID_INTEL)
 151                type = HDA_DEV_ASOC;
 152
 153        ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev, type);
 154        if (ret < 0)
 155                return ret;
 156
 157        if ((resp & 0xFFFF0000) == IDISP_VID_INTEL) {
 158                if (!hdev->bus->audio_component) {
 159                        dev_dbg(sdev->dev,
 160                                "iDisp hw present but no driver\n");
 161                        ret = -ENOENT;
 162                        goto out;
 163                }
 164                hda_priv->need_display_power = true;
 165        }
 166
 167        if (is_generic_config(hbus))
 168                codec->probe_id = HDA_CODEC_ID_GENERIC;
 169        else
 170                codec->probe_id = 0;
 171
 172        if (type == HDA_DEV_LEGACY) {
 173                ret = hda_codec_load_module(codec);
 174                /*
 175                 * handle ret==0 (no driver bound) as an error, but pass
 176                 * other return codes without modification
 177                 */
 178                if (ret == 0)
 179                        ret = -ENOENT;
 180        }
 181
 182out:
 183        if (ret < 0) {
 184                snd_hdac_device_unregister(hdev);
 185                put_device(&hdev->dev);
 186        }
 187#else
 188        hdev = devm_kzalloc(sdev->dev, sizeof(*hdev), GFP_KERNEL);
 189        if (!hdev)
 190                return -ENOMEM;
 191
 192        ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev, HDA_DEV_ASOC);
 193#endif
 194
 195        return ret;
 196}
 197
 198/* Codec initialization */
 199void hda_codec_probe_bus(struct snd_sof_dev *sdev,
 200                         bool hda_codec_use_common_hdmi)
 201{
 202        struct hdac_bus *bus = sof_to_bus(sdev);
 203        int i, ret;
 204
 205        /* probe codecs in avail slots */
 206        for (i = 0; i < HDA_MAX_CODECS; i++) {
 207
 208                if (!(bus->codec_mask & (1 << i)))
 209                        continue;
 210
 211                ret = hda_codec_probe(sdev, i, hda_codec_use_common_hdmi);
 212                if (ret < 0) {
 213                        dev_warn(bus->dev, "codec #%d probe error, ret: %d\n",
 214                                 i, ret);
 215                        bus->codec_mask &= ~BIT(i);
 216                }
 217        }
 218}
 219EXPORT_SYMBOL_NS(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
 220
 221#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \
 222        IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
 223
 224void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable)
 225{
 226        struct hdac_bus *bus = sof_to_bus(sdev);
 227
 228        if (HDA_IDISP_CODEC(bus->codec_mask)) {
 229                dev_dbg(bus->dev, "Turning i915 HDAC power %d\n", enable);
 230                snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, enable);
 231        }
 232}
 233EXPORT_SYMBOL_NS(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 234
 235int hda_codec_i915_init(struct snd_sof_dev *sdev)
 236{
 237        struct hdac_bus *bus = sof_to_bus(sdev);
 238        int ret;
 239
 240        /* i915 exposes a HDA codec for HDMI audio */
 241        ret = snd_hdac_i915_init(bus);
 242        if (ret < 0)
 243                return ret;
 244
 245        /* codec_mask not yet known, power up for probe */
 246        snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
 247
 248        return 0;
 249}
 250EXPORT_SYMBOL_NS(hda_codec_i915_init, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 251
 252int hda_codec_i915_exit(struct snd_sof_dev *sdev)
 253{
 254        struct hdac_bus *bus = sof_to_bus(sdev);
 255
 256        if (!bus->audio_component)
 257                return 0;
 258
 259        /* power down unconditionally */
 260        snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 261
 262        return snd_hdac_i915_exit(bus);
 263}
 264EXPORT_SYMBOL_NS(hda_codec_i915_exit, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 265
 266#endif
 267
 268MODULE_LICENSE("Dual BSD/GPL");
 269