1 // SPDX-License-Identifier: GPL-2.0-only 2 // This file incorporates work covered by the following copyright notice: 3 // Copyright (c) 2023 Intel Corporation 4 // Copyright (c) 2024 Advanced Micro Devices, Inc. 5 6 /* 7 * soc_sdw_cs_amp - Helpers to handle CS35L56 from generic machine driver 8 */ 9 10 #include <linux/device.h> 11 #include <linux/errno.h> 12 #include <sound/soc.h> 13 #include <sound/soc-acpi.h> 14 #include <sound/soc-dai.h> 15 #include <sound/soc_sdw_utils.h> 16 17 #define CODEC_NAME_SIZE 8 18 #define CS_AMP_CHANNELS_PER_AMP 4 19 20 int asoc_sdw_cs_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai) 21 { 22 const char *dai_name = rtd->dai_link->codecs->dai_name; 23 struct snd_soc_card *card = rtd->card; 24 char codec_name[CODEC_NAME_SIZE]; 25 char widget_name[16]; 26 struct snd_soc_dapm_route route = { "Speaker", NULL, widget_name }; 27 struct snd_soc_dai *codec_dai; 28 int i, ret; 29 30 snprintf(codec_name, CODEC_NAME_SIZE, "%s", dai_name); 31 card->components = devm_kasprintf(card->dev, GFP_KERNEL, 32 "%s spk:%s", 33 card->components, codec_name); 34 if (!card->components) 35 return -ENOMEM; 36 37 for_each_rtd_codec_dais(rtd, i, codec_dai) { 38 if (!strstr(codec_dai->name, "cs35l56")) 39 continue; 40 41 snprintf(widget_name, sizeof(widget_name), "%s SPK", 42 codec_dai->component->name_prefix); 43 ret = snd_soc_dapm_add_routes(&card->dapm, &route, 1); 44 if (ret) 45 return ret; 46 } 47 48 return 0; 49 } 50 EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_rtd_init, "SND_SOC_SDW_UTILS"); 51 52 int asoc_sdw_cs_spk_feedback_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai) 53 { 54 const struct snd_soc_dai_link *dai_link = rtd->dai_link; 55 const struct snd_soc_dai_link_ch_map *ch_map; 56 const struct snd_soc_dai_link_component *codec_dlc; 57 struct snd_soc_dai *codec_dai; 58 u8 ch_slot[8] = {}; 59 unsigned int amps_per_bus, ch_per_amp, mask; 60 int i, ret; 61 62 WARN_ON(dai_link->num_cpus > ARRAY_SIZE(ch_slot)); 63 64 /* 65 * CS35L56 has 4 TX channels. When the capture is aggregated the 66 * same bus slots will be allocated to all the amps on a bus. Only 67 * one amp on that bus can be transmitting in each slot so divide 68 * the available 4 slots between all the amps on a bus. 69 */ 70 amps_per_bus = dai_link->num_codecs / dai_link->num_cpus; 71 if ((amps_per_bus == 0) || (amps_per_bus > CS_AMP_CHANNELS_PER_AMP)) { 72 dev_err(rtd->card->dev, "Illegal num_codecs:%u / num_cpus:%u\n", 73 dai_link->num_codecs, dai_link->num_cpus); 74 return -EINVAL; 75 } 76 77 ch_per_amp = CS_AMP_CHANNELS_PER_AMP / amps_per_bus; 78 79 for_each_rtd_ch_maps(rtd, i, ch_map) { 80 codec_dlc = snd_soc_link_to_codec(rtd->dai_link, i); 81 codec_dai = snd_soc_find_dai(codec_dlc); 82 mask = GENMASK(ch_per_amp - 1, 0) << ch_slot[ch_map->cpu]; 83 84 ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, mask, 4, 32); 85 if (ret < 0) { 86 dev_err(rtd->card->dev, "Failed to set TDM slot:%d\n", ret); 87 return ret; 88 } 89 90 ch_slot[ch_map->cpu] += ch_per_amp; 91 } 92 93 return 0; 94 } 95 EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_feedback_rtd_init, "SND_SOC_SDW_UTILS"); 96 97 int asoc_sdw_cs_amp_init(struct snd_soc_card *card, 98 struct snd_soc_dai_link *dai_links, 99 struct asoc_sdw_codec_info *info, 100 bool playback) 101 { 102 /* Do init on playback link only. */ 103 if (!playback) 104 return 0; 105 106 info->amp_num++; 107 108 return 0; 109 } 110 EXPORT_SYMBOL_NS(asoc_sdw_cs_amp_init, "SND_SOC_SDW_UTILS"); 111