13a280ed1SRyder Lee // SPDX-License-Identifier: GPL-2.0 2283b6124SGarlic Tseng /* 3283b6124SGarlic Tseng * mtk-afe-fe-dais.c -- Mediatek afe fe dai operator 4283b6124SGarlic Tseng * 5283b6124SGarlic Tseng * Copyright (c) 2016 MediaTek Inc. 6283b6124SGarlic Tseng * Author: Garlic Tseng <garlic.tseng@mediatek.com> 7283b6124SGarlic Tseng */ 8283b6124SGarlic Tseng 9283b6124SGarlic Tseng #include <linux/module.h> 10283b6124SGarlic Tseng #include <linux/pm_runtime.h> 11283b6124SGarlic Tseng #include <linux/regmap.h> 12283b6124SGarlic Tseng #include <sound/soc.h> 13f1b5bf07SKuninori Morimoto #include "mtk-afe-platform-driver.h" 14283b6124SGarlic Tseng #include "mtk-afe-fe-dai.h" 15283b6124SGarlic Tseng #include "mtk-base-afe.h" 16283b6124SGarlic Tseng 17283b6124SGarlic Tseng #define AFE_BASE_END_OFFSET 8 18283b6124SGarlic Tseng 1922e76614SBaoyou Xie static int mtk_regmap_update_bits(struct regmap *map, int reg, 2022e76614SBaoyou Xie unsigned int mask, 21283b6124SGarlic Tseng unsigned int val) 22283b6124SGarlic Tseng { 23283b6124SGarlic Tseng if (reg < 0) 24283b6124SGarlic Tseng return 0; 25283b6124SGarlic Tseng return regmap_update_bits(map, reg, mask, val); 26283b6124SGarlic Tseng } 27283b6124SGarlic Tseng 2822e76614SBaoyou Xie static int mtk_regmap_write(struct regmap *map, int reg, unsigned int val) 29283b6124SGarlic Tseng { 30283b6124SGarlic Tseng if (reg < 0) 31283b6124SGarlic Tseng return 0; 32283b6124SGarlic Tseng return regmap_write(map, reg, val); 33283b6124SGarlic Tseng } 34283b6124SGarlic Tseng 35283b6124SGarlic Tseng int mtk_afe_fe_startup(struct snd_pcm_substream *substream, 36283b6124SGarlic Tseng struct snd_soc_dai *dai) 37283b6124SGarlic Tseng { 38283b6124SGarlic Tseng struct snd_soc_pcm_runtime *rtd = substream->private_data; 39e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 40283b6124SGarlic Tseng struct snd_pcm_runtime *runtime = substream->runtime; 41283b6124SGarlic Tseng int memif_num = rtd->cpu_dai->id; 42283b6124SGarlic Tseng struct mtk_base_afe_memif *memif = &afe->memif[memif_num]; 43283b6124SGarlic Tseng const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware; 44283b6124SGarlic Tseng int ret; 45283b6124SGarlic Tseng 46283b6124SGarlic Tseng memif->substream = substream; 47283b6124SGarlic Tseng 48283b6124SGarlic Tseng snd_pcm_hw_constraint_step(substream->runtime, 0, 49283b6124SGarlic Tseng SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16); 50283b6124SGarlic Tseng /* enable agent */ 51283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg, 52283b6124SGarlic Tseng 1 << memif->data->agent_disable_shift, 53283b6124SGarlic Tseng 0 << memif->data->agent_disable_shift); 54283b6124SGarlic Tseng 55283b6124SGarlic Tseng snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware); 56283b6124SGarlic Tseng 57283b6124SGarlic Tseng /* 58283b6124SGarlic Tseng * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be 59283b6124SGarlic Tseng * smaller than period_size due to AFE's internal buffer. 60283b6124SGarlic Tseng * This easily leads to overrun when avail_min is period_size. 61283b6124SGarlic Tseng * One more period can hold the possible unread buffer. 62283b6124SGarlic Tseng */ 63283b6124SGarlic Tseng if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 64283b6124SGarlic Tseng int periods_max = mtk_afe_hardware->periods_max; 65283b6124SGarlic Tseng 66283b6124SGarlic Tseng ret = snd_pcm_hw_constraint_minmax(runtime, 67283b6124SGarlic Tseng SNDRV_PCM_HW_PARAM_PERIODS, 68283b6124SGarlic Tseng 3, periods_max); 69283b6124SGarlic Tseng if (ret < 0) { 70283b6124SGarlic Tseng dev_err(afe->dev, "hw_constraint_minmax failed\n"); 71283b6124SGarlic Tseng return ret; 72283b6124SGarlic Tseng } 73283b6124SGarlic Tseng } 74283b6124SGarlic Tseng 75283b6124SGarlic Tseng ret = snd_pcm_hw_constraint_integer(runtime, 76283b6124SGarlic Tseng SNDRV_PCM_HW_PARAM_PERIODS); 77283b6124SGarlic Tseng if (ret < 0) 78283b6124SGarlic Tseng dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n"); 79283b6124SGarlic Tseng 80283b6124SGarlic Tseng /* dynamic allocate irq to memif */ 81283b6124SGarlic Tseng if (memif->irq_usage < 0) { 82283b6124SGarlic Tseng int irq_id = mtk_dynamic_irq_acquire(afe); 83283b6124SGarlic Tseng 84283b6124SGarlic Tseng if (irq_id != afe->irqs_size) { 85283b6124SGarlic Tseng /* link */ 86283b6124SGarlic Tseng memif->irq_usage = irq_id; 87283b6124SGarlic Tseng } else { 88283b6124SGarlic Tseng dev_err(afe->dev, "%s() error: no more asys irq\n", 89283b6124SGarlic Tseng __func__); 90283b6124SGarlic Tseng ret = -EBUSY; 91283b6124SGarlic Tseng } 92283b6124SGarlic Tseng } 93283b6124SGarlic Tseng return ret; 94283b6124SGarlic Tseng } 95283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_startup); 96283b6124SGarlic Tseng 97283b6124SGarlic Tseng void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream, 98283b6124SGarlic Tseng struct snd_soc_dai *dai) 99283b6124SGarlic Tseng { 100283b6124SGarlic Tseng struct snd_soc_pcm_runtime *rtd = substream->private_data; 101e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 102283b6124SGarlic Tseng struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id]; 103283b6124SGarlic Tseng int irq_id; 104283b6124SGarlic Tseng 105283b6124SGarlic Tseng irq_id = memif->irq_usage; 106283b6124SGarlic Tseng 107283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg, 108283b6124SGarlic Tseng 1 << memif->data->agent_disable_shift, 109283b6124SGarlic Tseng 1 << memif->data->agent_disable_shift); 110283b6124SGarlic Tseng 111283b6124SGarlic Tseng if (!memif->const_irq) { 112283b6124SGarlic Tseng mtk_dynamic_irq_release(afe, irq_id); 113283b6124SGarlic Tseng memif->irq_usage = -1; 114283b6124SGarlic Tseng memif->substream = NULL; 115283b6124SGarlic Tseng } 116283b6124SGarlic Tseng } 117283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown); 118283b6124SGarlic Tseng 119283b6124SGarlic Tseng int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream, 120283b6124SGarlic Tseng struct snd_pcm_hw_params *params, 121283b6124SGarlic Tseng struct snd_soc_dai *dai) 122283b6124SGarlic Tseng { 123283b6124SGarlic Tseng struct snd_soc_pcm_runtime *rtd = substream->private_data; 124e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 125283b6124SGarlic Tseng struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id]; 126283b6124SGarlic Tseng int msb_at_bit33 = 0; 127283b6124SGarlic Tseng int ret, fs = 0; 128283b6124SGarlic Tseng 129283b6124SGarlic Tseng ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 130283b6124SGarlic Tseng if (ret < 0) 131283b6124SGarlic Tseng return ret; 132283b6124SGarlic Tseng 133283b6124SGarlic Tseng msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0; 134283b6124SGarlic Tseng memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr); 135283b6124SGarlic Tseng memif->buffer_size = substream->runtime->dma_bytes; 136283b6124SGarlic Tseng 137283b6124SGarlic Tseng /* start */ 138283b6124SGarlic Tseng mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base, 139283b6124SGarlic Tseng memif->phys_buf_addr); 140283b6124SGarlic Tseng /* end */ 141283b6124SGarlic Tseng mtk_regmap_write(afe->regmap, 142283b6124SGarlic Tseng memif->data->reg_ofs_base + AFE_BASE_END_OFFSET, 143283b6124SGarlic Tseng memif->phys_buf_addr + memif->buffer_size - 1); 144283b6124SGarlic Tseng 145283b6124SGarlic Tseng /* set MSB to 33-bit */ 146283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg, 147283b6124SGarlic Tseng 1 << memif->data->msb_shift, 148283b6124SGarlic Tseng msb_at_bit33 << memif->data->msb_shift); 149283b6124SGarlic Tseng 150283b6124SGarlic Tseng /* set channel */ 151283b6124SGarlic Tseng if (memif->data->mono_shift >= 0) { 152283b6124SGarlic Tseng unsigned int mono = (params_channels(params) == 1) ? 1 : 0; 153283b6124SGarlic Tseng 154283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg, 155283b6124SGarlic Tseng 1 << memif->data->mono_shift, 156283b6124SGarlic Tseng mono << memif->data->mono_shift); 157283b6124SGarlic Tseng } 158283b6124SGarlic Tseng 159283b6124SGarlic Tseng /* set rate */ 160283b6124SGarlic Tseng if (memif->data->fs_shift < 0) 161283b6124SGarlic Tseng return 0; 162283b6124SGarlic Tseng 163283b6124SGarlic Tseng fs = afe->memif_fs(substream, params_rate(params)); 164283b6124SGarlic Tseng 165283b6124SGarlic Tseng if (fs < 0) 166283b6124SGarlic Tseng return -EINVAL; 167283b6124SGarlic Tseng 168283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg, 169283b6124SGarlic Tseng memif->data->fs_maskbit << memif->data->fs_shift, 170283b6124SGarlic Tseng fs << memif->data->fs_shift); 171283b6124SGarlic Tseng 172283b6124SGarlic Tseng return 0; 173283b6124SGarlic Tseng } 174283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params); 175283b6124SGarlic Tseng 176283b6124SGarlic Tseng int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream, 177283b6124SGarlic Tseng struct snd_soc_dai *dai) 178283b6124SGarlic Tseng { 179283b6124SGarlic Tseng return snd_pcm_lib_free_pages(substream); 180283b6124SGarlic Tseng } 181283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free); 182283b6124SGarlic Tseng 183283b6124SGarlic Tseng int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd, 184283b6124SGarlic Tseng struct snd_soc_dai *dai) 185283b6124SGarlic Tseng { 186283b6124SGarlic Tseng struct snd_soc_pcm_runtime *rtd = substream->private_data; 187283b6124SGarlic Tseng struct snd_pcm_runtime * const runtime = substream->runtime; 188e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 189283b6124SGarlic Tseng struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id]; 190283b6124SGarlic Tseng struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage]; 191283b6124SGarlic Tseng const struct mtk_base_irq_data *irq_data = irqs->irq_data; 192283b6124SGarlic Tseng unsigned int counter = runtime->period_size; 193283b6124SGarlic Tseng int fs; 194283b6124SGarlic Tseng 195283b6124SGarlic Tseng dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd); 196283b6124SGarlic Tseng 197283b6124SGarlic Tseng switch (cmd) { 198283b6124SGarlic Tseng case SNDRV_PCM_TRIGGER_START: 199283b6124SGarlic Tseng case SNDRV_PCM_TRIGGER_RESUME: 200283b6124SGarlic Tseng if (memif->data->enable_shift >= 0) 201283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, 202283b6124SGarlic Tseng memif->data->enable_reg, 203283b6124SGarlic Tseng 1 << memif->data->enable_shift, 204283b6124SGarlic Tseng 1 << memif->data->enable_shift); 205283b6124SGarlic Tseng 206283b6124SGarlic Tseng /* set irq counter */ 207283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg, 208283b6124SGarlic Tseng irq_data->irq_cnt_maskbit 209283b6124SGarlic Tseng << irq_data->irq_cnt_shift, 210283b6124SGarlic Tseng counter << irq_data->irq_cnt_shift); 211283b6124SGarlic Tseng 212283b6124SGarlic Tseng /* set irq fs */ 213283b6124SGarlic Tseng fs = afe->irq_fs(substream, runtime->rate); 214283b6124SGarlic Tseng 215283b6124SGarlic Tseng if (fs < 0) 216283b6124SGarlic Tseng return -EINVAL; 217283b6124SGarlic Tseng 218283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg, 219283b6124SGarlic Tseng irq_data->irq_fs_maskbit 220283b6124SGarlic Tseng << irq_data->irq_fs_shift, 221283b6124SGarlic Tseng fs << irq_data->irq_fs_shift); 222283b6124SGarlic Tseng 223283b6124SGarlic Tseng /* enable interrupt */ 224283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg, 225283b6124SGarlic Tseng 1 << irq_data->irq_en_shift, 226283b6124SGarlic Tseng 1 << irq_data->irq_en_shift); 227283b6124SGarlic Tseng 228283b6124SGarlic Tseng return 0; 229283b6124SGarlic Tseng case SNDRV_PCM_TRIGGER_STOP: 230283b6124SGarlic Tseng case SNDRV_PCM_TRIGGER_SUSPEND: 231283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg, 232283b6124SGarlic Tseng 1 << memif->data->enable_shift, 0); 233283b6124SGarlic Tseng /* disable interrupt */ 234283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg, 235283b6124SGarlic Tseng 1 << irq_data->irq_en_shift, 236283b6124SGarlic Tseng 0 << irq_data->irq_en_shift); 237283b6124SGarlic Tseng /* and clear pending IRQ */ 238283b6124SGarlic Tseng mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg, 239283b6124SGarlic Tseng 1 << irq_data->irq_clr_shift); 240283b6124SGarlic Tseng return 0; 241283b6124SGarlic Tseng default: 242283b6124SGarlic Tseng return -EINVAL; 243283b6124SGarlic Tseng } 244283b6124SGarlic Tseng } 245283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger); 246283b6124SGarlic Tseng 247283b6124SGarlic Tseng int mtk_afe_fe_prepare(struct snd_pcm_substream *substream, 248283b6124SGarlic Tseng struct snd_soc_dai *dai) 249283b6124SGarlic Tseng { 250283b6124SGarlic Tseng struct snd_soc_pcm_runtime *rtd = substream->private_data; 251e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 252283b6124SGarlic Tseng struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id]; 253283b6124SGarlic Tseng int hd_audio = 0; 254283b6124SGarlic Tseng 255283b6124SGarlic Tseng /* set hd mode */ 256283b6124SGarlic Tseng switch (substream->runtime->format) { 257283b6124SGarlic Tseng case SNDRV_PCM_FORMAT_S16_LE: 258283b6124SGarlic Tseng hd_audio = 0; 259283b6124SGarlic Tseng break; 260283b6124SGarlic Tseng case SNDRV_PCM_FORMAT_S32_LE: 261283b6124SGarlic Tseng hd_audio = 1; 262283b6124SGarlic Tseng break; 263283b6124SGarlic Tseng case SNDRV_PCM_FORMAT_S24_LE: 264283b6124SGarlic Tseng hd_audio = 1; 265283b6124SGarlic Tseng break; 266283b6124SGarlic Tseng default: 267283b6124SGarlic Tseng dev_err(afe->dev, "%s() error: unsupported format %d\n", 268283b6124SGarlic Tseng __func__, substream->runtime->format); 269283b6124SGarlic Tseng break; 270283b6124SGarlic Tseng } 271283b6124SGarlic Tseng 272283b6124SGarlic Tseng mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg, 273283b6124SGarlic Tseng 1 << memif->data->hd_shift, 274283b6124SGarlic Tseng hd_audio << memif->data->hd_shift); 275283b6124SGarlic Tseng 276283b6124SGarlic Tseng return 0; 277283b6124SGarlic Tseng } 278283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare); 279283b6124SGarlic Tseng 280283b6124SGarlic Tseng const struct snd_soc_dai_ops mtk_afe_fe_ops = { 281283b6124SGarlic Tseng .startup = mtk_afe_fe_startup, 282283b6124SGarlic Tseng .shutdown = mtk_afe_fe_shutdown, 283283b6124SGarlic Tseng .hw_params = mtk_afe_fe_hw_params, 284283b6124SGarlic Tseng .hw_free = mtk_afe_fe_hw_free, 285283b6124SGarlic Tseng .prepare = mtk_afe_fe_prepare, 286283b6124SGarlic Tseng .trigger = mtk_afe_fe_trigger, 287283b6124SGarlic Tseng }; 288283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_fe_ops); 289283b6124SGarlic Tseng 290283b6124SGarlic Tseng static DEFINE_MUTEX(irqs_lock); 291283b6124SGarlic Tseng int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe) 292283b6124SGarlic Tseng { 293283b6124SGarlic Tseng int i; 294283b6124SGarlic Tseng 295283b6124SGarlic Tseng mutex_lock(&afe->irq_alloc_lock); 296283b6124SGarlic Tseng for (i = 0; i < afe->irqs_size; ++i) { 297283b6124SGarlic Tseng if (afe->irqs[i].irq_occupyed == 0) { 298283b6124SGarlic Tseng afe->irqs[i].irq_occupyed = 1; 299283b6124SGarlic Tseng mutex_unlock(&afe->irq_alloc_lock); 300283b6124SGarlic Tseng return i; 301283b6124SGarlic Tseng } 302283b6124SGarlic Tseng } 303283b6124SGarlic Tseng mutex_unlock(&afe->irq_alloc_lock); 304283b6124SGarlic Tseng return afe->irqs_size; 305283b6124SGarlic Tseng } 306283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire); 307283b6124SGarlic Tseng 308283b6124SGarlic Tseng int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id) 309283b6124SGarlic Tseng { 310283b6124SGarlic Tseng mutex_lock(&afe->irq_alloc_lock); 311283b6124SGarlic Tseng if (irq_id >= 0 && irq_id < afe->irqs_size) { 312283b6124SGarlic Tseng afe->irqs[irq_id].irq_occupyed = 0; 313283b6124SGarlic Tseng mutex_unlock(&afe->irq_alloc_lock); 314283b6124SGarlic Tseng return 0; 315283b6124SGarlic Tseng } 316283b6124SGarlic Tseng mutex_unlock(&afe->irq_alloc_lock); 317283b6124SGarlic Tseng return -EINVAL; 318283b6124SGarlic Tseng } 319283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release); 320283b6124SGarlic Tseng 321283b6124SGarlic Tseng int mtk_afe_dai_suspend(struct snd_soc_dai *dai) 322283b6124SGarlic Tseng { 323e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 324283b6124SGarlic Tseng struct device *dev = afe->dev; 325283b6124SGarlic Tseng struct regmap *regmap = afe->regmap; 326283b6124SGarlic Tseng int i; 327283b6124SGarlic Tseng 328283b6124SGarlic Tseng if (pm_runtime_status_suspended(dev) || afe->suspended) 329283b6124SGarlic Tseng return 0; 330283b6124SGarlic Tseng 331283b6124SGarlic Tseng if (!afe->reg_back_up) 332283b6124SGarlic Tseng afe->reg_back_up = 333283b6124SGarlic Tseng devm_kcalloc(dev, afe->reg_back_up_list_num, 334283b6124SGarlic Tseng sizeof(unsigned int), GFP_KERNEL); 335283b6124SGarlic Tseng 336283b6124SGarlic Tseng for (i = 0; i < afe->reg_back_up_list_num; i++) 337283b6124SGarlic Tseng regmap_read(regmap, afe->reg_back_up_list[i], 338283b6124SGarlic Tseng &afe->reg_back_up[i]); 339283b6124SGarlic Tseng 340283b6124SGarlic Tseng afe->suspended = true; 341283b6124SGarlic Tseng afe->runtime_suspend(dev); 342283b6124SGarlic Tseng return 0; 343283b6124SGarlic Tseng } 344283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_dai_suspend); 345283b6124SGarlic Tseng 346283b6124SGarlic Tseng int mtk_afe_dai_resume(struct snd_soc_dai *dai) 347283b6124SGarlic Tseng { 348e4b31b81SRyder Lee struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); 349283b6124SGarlic Tseng struct device *dev = afe->dev; 350283b6124SGarlic Tseng struct regmap *regmap = afe->regmap; 351283b6124SGarlic Tseng int i = 0; 352283b6124SGarlic Tseng 353283b6124SGarlic Tseng if (pm_runtime_status_suspended(dev) || !afe->suspended) 354283b6124SGarlic Tseng return 0; 355283b6124SGarlic Tseng 356283b6124SGarlic Tseng afe->runtime_resume(dev); 357283b6124SGarlic Tseng 358283b6124SGarlic Tseng if (!afe->reg_back_up) 359283b6124SGarlic Tseng dev_dbg(dev, "%s no reg_backup\n", __func__); 360283b6124SGarlic Tseng 361283b6124SGarlic Tseng for (i = 0; i < afe->reg_back_up_list_num; i++) 362283b6124SGarlic Tseng mtk_regmap_write(regmap, afe->reg_back_up_list[i], 363283b6124SGarlic Tseng afe->reg_back_up[i]); 364283b6124SGarlic Tseng 365283b6124SGarlic Tseng afe->suspended = false; 366283b6124SGarlic Tseng return 0; 367283b6124SGarlic Tseng } 368283b6124SGarlic Tseng EXPORT_SYMBOL_GPL(mtk_afe_dai_resume); 369283b6124SGarlic Tseng 370283b6124SGarlic Tseng MODULE_DESCRIPTION("Mediatek simple fe dai operator"); 371283b6124SGarlic Tseng MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>"); 372283b6124SGarlic Tseng MODULE_LICENSE("GPL v2"); 373