1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved. 4 // 5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com> 6 // Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com> 7 // 8 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 #include <sound/hda_codec.h> 12 #include <sound/hda_i915.h> 13 #include <sound/soc.h> 14 #include <sound/soc-acpi.h> 15 #include "../../../codecs/hda.h" 16 17 static int avs_create_dai_links(struct device *dev, struct hda_codec *codec, int pcm_count, 18 const char *platform_name, struct snd_soc_dai_link **links) 19 { 20 struct snd_soc_dai_link_component *platform; 21 struct snd_soc_dai_link *dl; 22 struct hda_pcm *pcm; 23 const char *cname = dev_name(&codec->core.dev); 24 int i; 25 26 dl = devm_kcalloc(dev, pcm_count, sizeof(*dl), GFP_KERNEL); 27 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL); 28 if (!dl || !platform) 29 return -ENOMEM; 30 31 platform->name = platform_name; 32 pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list); 33 34 for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) { 35 dl[i].name = devm_kasprintf(dev, GFP_KERNEL, "%s link%d", cname, i); 36 if (!dl[i].name) 37 return -ENOMEM; 38 39 dl[i].id = i; 40 dl[i].nonatomic = 1; 41 dl[i].no_pcm = 1; 42 dl[i].dpcm_playback = 1; 43 dl[i].dpcm_capture = 1; 44 dl[i].platforms = platform; 45 dl[i].num_platforms = 1; 46 dl[i].ignore_pmdown_time = 1; 47 48 dl[i].codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL); 49 dl[i].cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL); 50 if (!dl[i].codecs || !dl[i].cpus) 51 return -ENOMEM; 52 53 dl[i].cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "%s-cpu%d", cname, i); 54 if (!dl[i].cpus->dai_name) 55 return -ENOMEM; 56 57 dl[i].codecs->name = devm_kstrdup(dev, cname, GFP_KERNEL); 58 if (!dl[i].codecs->name) 59 return -ENOMEM; 60 61 dl[i].codecs->dai_name = pcm->name; 62 dl[i].num_codecs = 1; 63 dl[i].num_cpus = 1; 64 } 65 66 *links = dl; 67 return 0; 68 } 69 70 /* Should be aligned with SectionPCM's name from topology */ 71 #define FEDAI_NAME_PREFIX "HDMI" 72 73 static struct snd_pcm * 74 avs_card_hdmi_pcm_at(struct snd_soc_card *card, int hdmi_idx) 75 { 76 struct snd_soc_pcm_runtime *rtd; 77 int dir = SNDRV_PCM_STREAM_PLAYBACK; 78 79 for_each_card_rtds(card, rtd) { 80 struct snd_pcm *spcm; 81 int ret, n; 82 83 spcm = rtd->pcm ? rtd->pcm->streams[dir].pcm : NULL; 84 if (!spcm || !strstr(spcm->id, FEDAI_NAME_PREFIX)) 85 continue; 86 87 ret = sscanf(spcm->id, FEDAI_NAME_PREFIX "%d", &n); 88 if (ret != 1) 89 continue; 90 if (n == hdmi_idx) 91 return rtd->pcm; 92 } 93 94 return NULL; 95 } 96 97 static int avs_card_late_probe(struct snd_soc_card *card) 98 { 99 struct snd_soc_acpi_mach *mach = dev_get_platdata(card->dev); 100 struct hda_codec *codec = mach->pdata; 101 struct hda_pcm *hpcm; 102 /* Topology pcm indexing is 1-based */ 103 int i = 1; 104 105 list_for_each_entry(hpcm, &codec->pcm_list_head, list) { 106 struct snd_pcm *spcm; 107 108 spcm = avs_card_hdmi_pcm_at(card, i); 109 if (spcm) { 110 hpcm->pcm = spcm; 111 hpcm->device = spcm->device; 112 dev_info(card->dev, "%s: mapping HDMI converter %d to PCM %d (%p)\n", 113 __func__, i, hpcm->device, spcm); 114 } else { 115 hpcm->pcm = NULL; 116 hpcm->device = SNDRV_PCM_INVALID_DEVICE; 117 dev_warn(card->dev, "%s: no PCM in topology for HDMI converter %d\n", 118 __func__, i); 119 } 120 i++; 121 } 122 123 return hda_codec_probe_complete(codec); 124 } 125 126 static int avs_probing_link_init(struct snd_soc_pcm_runtime *rtm) 127 { 128 struct snd_soc_acpi_mach *mach; 129 struct snd_soc_dai_link *links = NULL; 130 struct snd_soc_card *card = rtm->card; 131 struct hda_codec *codec; 132 struct hda_pcm *pcm; 133 int ret, pcm_count = 0; 134 135 mach = dev_get_platdata(card->dev); 136 codec = mach->pdata; 137 138 if (list_empty(&codec->pcm_list_head)) 139 return -EINVAL; 140 list_for_each_entry(pcm, &codec->pcm_list_head, list) 141 pcm_count++; 142 143 ret = avs_create_dai_links(card->dev, codec, pcm_count, mach->mach_params.platform, &links); 144 if (ret < 0) { 145 dev_err(card->dev, "create links failed: %d\n", ret); 146 return ret; 147 } 148 149 ret = snd_soc_add_pcm_runtimes(card, links, pcm_count); 150 if (ret < 0) { 151 dev_err(card->dev, "add links failed: %d\n", ret); 152 return ret; 153 } 154 155 return 0; 156 } 157 158 static struct snd_soc_dai_link probing_link = { 159 .name = "probing-LINK", 160 .id = -1, 161 .nonatomic = 1, 162 .no_pcm = 1, 163 .dpcm_playback = 1, 164 .dpcm_capture = 1, 165 .cpus = &snd_soc_dummy_dlc, 166 .num_cpus = 1, 167 .init = avs_probing_link_init, 168 }; 169 170 static int avs_hdaudio_probe(struct platform_device *pdev) 171 { 172 struct snd_soc_dai_link *binder; 173 struct snd_soc_acpi_mach *mach; 174 struct snd_soc_card *card; 175 struct device *dev = &pdev->dev; 176 struct hda_codec *codec; 177 178 mach = dev_get_platdata(dev); 179 codec = mach->pdata; 180 181 /* codec may be unloaded before card's probe() fires */ 182 if (!device_is_registered(&codec->core.dev)) 183 return -ENODEV; 184 185 binder = devm_kmemdup(dev, &probing_link, sizeof(probing_link), GFP_KERNEL); 186 if (!binder) 187 return -ENOMEM; 188 189 binder->platforms = devm_kzalloc(dev, sizeof(*binder->platforms), GFP_KERNEL); 190 binder->codecs = devm_kzalloc(dev, sizeof(*binder->codecs), GFP_KERNEL); 191 if (!binder->platforms || !binder->codecs) 192 return -ENOMEM; 193 194 binder->codecs->name = devm_kstrdup(dev, dev_name(&codec->core.dev), GFP_KERNEL); 195 if (!binder->codecs->name) 196 return -ENOMEM; 197 198 binder->platforms->name = mach->mach_params.platform; 199 binder->num_platforms = 1; 200 binder->codecs->dai_name = "codec-probing-DAI"; 201 binder->num_codecs = 1; 202 203 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 204 if (!card) 205 return -ENOMEM; 206 207 card->name = binder->codecs->name; 208 card->dev = dev; 209 card->owner = THIS_MODULE; 210 card->dai_link = binder; 211 card->num_links = 1; 212 card->fully_routed = true; 213 if (hda_codec_is_display(codec)) 214 card->late_probe = avs_card_late_probe; 215 216 return devm_snd_soc_register_card(dev, card); 217 } 218 219 static const struct platform_device_id avs_hdaudio_driver_ids[] = { 220 { 221 .name = "avs_hdaudio", 222 }, 223 {}, 224 }; 225 MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids); 226 227 static struct platform_driver avs_hdaudio_driver = { 228 .probe = avs_hdaudio_probe, 229 .driver = { 230 .name = "avs_hdaudio", 231 .pm = &snd_soc_pm_ops, 232 }, 233 .id_table = avs_hdaudio_driver_ids, 234 }; 235 236 module_platform_driver(avs_hdaudio_driver) 237 238 MODULE_DESCRIPTION("Intel HD-Audio machine driver"); 239 MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>"); 240 MODULE_LICENSE("GPL"); 241