1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2025 Texas Instruments Inc. 3 4 /* 5 * soc_sdw_ti_amp - Helpers to handle TI's soundwire based codecs 6 */ 7 8 #include <linux/device.h> 9 #include <linux/errno.h> 10 #include <sound/soc.h> 11 #include <sound/soc-acpi.h> 12 #include <sound/soc-dai.h> 13 #include <sound/soc_sdw_utils.h> 14 15 #define TIAMP_SPK_VOLUME_0DB 200 16 17 int asoc_sdw_ti_amp_initial_settings(struct snd_soc_card *card, 18 const char *name_prefix) 19 { 20 char *volume_ctl_name; 21 int ret; 22 23 volume_ctl_name = kasprintf(GFP_KERNEL, "%s Speaker Volume", 24 name_prefix); 25 if (!volume_ctl_name) 26 return -ENOMEM; 27 28 ret = snd_soc_limit_volume(card, volume_ctl_name, 29 TIAMP_SPK_VOLUME_0DB); 30 if (ret) 31 dev_err(card->dev, 32 "%s update failed %d\n", 33 volume_ctl_name, ret); 34 35 kfree(volume_ctl_name); 36 return 0; 37 } 38 EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_initial_settings, "SND_SOC_SDW_UTILS"); 39 40 int asoc_sdw_ti_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, 41 struct snd_soc_dai *dai) 42 { 43 struct snd_soc_card *card = rtd->card; 44 char widget_name[16]; 45 char speaker[16]; 46 struct snd_soc_dapm_route route = {speaker, NULL, widget_name}; 47 struct snd_soc_dai *codec_dai; 48 const char *prefix; 49 int i, ret = 0; 50 51 for_each_rtd_codec_dais(rtd, i, codec_dai) { 52 if (!strstr(codec_dai->name, "tas2783")) 53 continue; 54 55 prefix = codec_dai->component->name_prefix; 56 if (!strncmp(prefix, "tas2783-1", strlen("tas2783-1"))) { 57 strscpy(speaker, "Left Spk", sizeof(speaker)); 58 } else if (!strncmp(prefix, "tas2783-2", strlen("tas2783-2"))) { 59 strscpy(speaker, "Right Spk", sizeof(speaker)); 60 } else { 61 ret = -EINVAL; 62 dev_err(card->dev, "unhandled prefix %s", prefix); 63 break; 64 } 65 66 snprintf(widget_name, sizeof(widget_name), "%s SPK", prefix); 67 ret = asoc_sdw_ti_amp_initial_settings(card, prefix); 68 if (ret) 69 return ret; 70 71 ret = snd_soc_dapm_add_routes(&card->dapm, &route, 1); 72 if (ret) 73 return ret; 74 } 75 76 return ret; 77 } 78 EXPORT_SYMBOL_NS(asoc_sdw_ti_spk_rtd_init, "SND_SOC_SDW_UTILS"); 79 80 int asoc_sdw_ti_amp_init(struct snd_soc_card *card, 81 struct snd_soc_dai_link *dai_links, 82 struct asoc_sdw_codec_info *info, 83 bool playback) 84 { 85 if (!playback) 86 return 0; 87 88 info->amp_num++; 89 90 return 0; 91 } 92 EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_init, "SND_SOC_SDW_UTILS"); 93