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 dl[i].codecs->dai_name = pcm->name; 59 dl[i].num_codecs = 1; 60 dl[i].num_cpus = 1; 61 } 62 63 *links = dl; 64 return 0; 65 } 66 67 /* Should be aligned with SectionPCM's name from topology */ 68 #define FEDAI_NAME_PREFIX "HDMI" 69 70 static struct snd_pcm * 71 avs_card_hdmi_pcm_at(struct snd_soc_card *card, int hdmi_idx) 72 { 73 struct snd_soc_pcm_runtime *rtd; 74 int dir = SNDRV_PCM_STREAM_PLAYBACK; 75 76 for_each_card_rtds(card, rtd) { 77 struct snd_pcm *spcm; 78 int ret, n; 79 80 spcm = rtd->pcm ? rtd->pcm->streams[dir].pcm : NULL; 81 if (!spcm || !strstr(spcm->id, FEDAI_NAME_PREFIX)) 82 continue; 83 84 ret = sscanf(spcm->id, FEDAI_NAME_PREFIX "%d", &n); 85 if (ret != 1) 86 continue; 87 if (n == hdmi_idx) 88 return rtd->pcm; 89 } 90 91 return NULL; 92 } 93 94 static int avs_card_late_probe(struct snd_soc_card *card) 95 { 96 struct snd_soc_acpi_mach *mach = dev_get_platdata(card->dev); 97 struct hda_codec *codec = mach->pdata; 98 struct hda_pcm *hpcm; 99 /* Topology pcm indexing is 1-based */ 100 int i = 1; 101 102 list_for_each_entry(hpcm, &codec->pcm_list_head, list) { 103 struct snd_pcm *spcm; 104 105 spcm = avs_card_hdmi_pcm_at(card, i); 106 if (spcm) { 107 hpcm->pcm = spcm; 108 hpcm->device = spcm->device; 109 dev_info(card->dev, "%s: mapping HDMI converter %d to PCM %d (%p)\n", 110 __func__, i, hpcm->device, spcm); 111 } else { 112 hpcm->pcm = NULL; 113 hpcm->device = SNDRV_PCM_INVALID_DEVICE; 114 dev_warn(card->dev, "%s: no PCM in topology for HDMI converter %d\n", 115 __func__, i); 116 } 117 i++; 118 } 119 120 return hda_codec_probe_complete(codec); 121 } 122 123 static int avs_probing_link_init(struct snd_soc_pcm_runtime *rtm) 124 { 125 struct snd_soc_acpi_mach *mach; 126 struct snd_soc_dai_link *links = NULL; 127 struct snd_soc_card *card = rtm->card; 128 struct hda_codec *codec; 129 struct hda_pcm *pcm; 130 int ret, pcm_count = 0; 131 132 mach = dev_get_platdata(card->dev); 133 codec = mach->pdata; 134 135 if (list_empty(&codec->pcm_list_head)) 136 return -EINVAL; 137 list_for_each_entry(pcm, &codec->pcm_list_head, list) 138 pcm_count++; 139 140 ret = avs_create_dai_links(card->dev, codec, pcm_count, mach->mach_params.platform, &links); 141 if (ret < 0) { 142 dev_err(card->dev, "create links failed: %d\n", ret); 143 return ret; 144 } 145 146 ret = snd_soc_add_pcm_runtimes(card, links, pcm_count); 147 if (ret < 0) { 148 dev_err(card->dev, "add links failed: %d\n", ret); 149 return ret; 150 } 151 152 return 0; 153 } 154 155 SND_SOC_DAILINK_DEF(dummy, DAILINK_COMP_ARRAY(COMP_DUMMY())); 156 157 static struct snd_soc_dai_link probing_link = { 158 .name = "probing-LINK", 159 .id = -1, 160 .nonatomic = 1, 161 .no_pcm = 1, 162 .dpcm_playback = 1, 163 .dpcm_capture = 1, 164 .cpus = dummy, 165 .num_cpus = ARRAY_SIZE(dummy), 166 .init = avs_probing_link_init, 167 }; 168 169 static int avs_hdaudio_probe(struct platform_device *pdev) 170 { 171 struct snd_soc_dai_link *binder; 172 struct snd_soc_acpi_mach *mach; 173 struct snd_soc_card *card; 174 struct device *dev = &pdev->dev; 175 struct hda_codec *codec; 176 177 mach = dev_get_platdata(dev); 178 codec = mach->pdata; 179 180 /* codec may be unloaded before card's probe() fires */ 181 if (!device_is_registered(&codec->core.dev)) 182 return -ENODEV; 183 184 binder = devm_kmemdup(dev, &probing_link, sizeof(probing_link), GFP_KERNEL); 185 if (!binder) 186 return -ENOMEM; 187 188 binder->platforms = devm_kzalloc(dev, sizeof(*binder->platforms), GFP_KERNEL); 189 binder->codecs = devm_kzalloc(dev, sizeof(*binder->codecs), GFP_KERNEL); 190 if (!binder->platforms || !binder->codecs) 191 return -ENOMEM; 192 193 binder->codecs->name = devm_kstrdup(dev, dev_name(&codec->core.dev), GFP_KERNEL); 194 if (!binder->codecs->name) 195 return -ENOMEM; 196 197 binder->platforms->name = mach->mach_params.platform; 198 binder->num_platforms = 1; 199 binder->codecs->dai_name = "codec-probing-DAI"; 200 binder->num_codecs = 1; 201 202 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 203 if (!card) 204 return -ENOMEM; 205 206 card->name = binder->codecs->name; 207 card->dev = dev; 208 card->owner = THIS_MODULE; 209 card->dai_link = binder; 210 card->num_links = 1; 211 card->fully_routed = true; 212 if (hda_codec_is_display(codec)) 213 card->late_probe = avs_card_late_probe; 214 215 return devm_snd_soc_register_card(dev, card); 216 } 217 218 static struct platform_driver avs_hdaudio_driver = { 219 .probe = avs_hdaudio_probe, 220 .driver = { 221 .name = "avs_hdaudio", 222 .pm = &snd_soc_pm_ops, 223 }, 224 }; 225 226 module_platform_driver(avs_hdaudio_driver) 227 228 MODULE_DESCRIPTION("Intel HD-Audio machine driver"); 229 MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>"); 230 MODULE_LICENSE("GPL"); 231 MODULE_ALIAS("platform:avs_hdaudio"); 232