diff options
Diffstat (limited to 'sound/soc/sdw_utils/soc_sdw_cs_amp.c')
| -rw-r--r-- | sound/soc/sdw_utils/soc_sdw_cs_amp.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/sound/soc/sdw_utils/soc_sdw_cs_amp.c b/sound/soc/sdw_utils/soc_sdw_cs_amp.c new file mode 100644 index 000000000000..35b550bcd4de --- /dev/null +++ b/sound/soc/sdw_utils/soc_sdw_cs_amp.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-only +// This file incorporates work covered by the following copyright notice: +// Copyright (c) 2023 Intel Corporation +// Copyright (c) 2024 Advanced Micro Devices, Inc. + +/* + * soc_sdw_cs_amp - Helpers to handle CS35L56 from generic machine driver + */ + +#include <linux/device.h> +#include <linux/errno.h> +#include <sound/soc.h> +#include <sound/soc-acpi.h> +#include <sound/soc-dai.h> +#include <sound/soc_sdw_utils.h> + +#define CODEC_NAME_SIZE 8 +#define CS_AMP_CHANNELS_PER_AMP 4 +#define CS35L56_SPK_VOLUME_0DB 400 /* 0dB Max */ + +int asoc_sdw_cs35l56_volume_limit(struct snd_soc_card *card, const char *name_prefix) +{ + char *volume_ctl_name; + int ret; + + volume_ctl_name = kasprintf(GFP_KERNEL, "%s Speaker Volume", name_prefix); + if (!volume_ctl_name) + return -ENOMEM; + + ret = snd_soc_limit_volume(card, volume_ctl_name, CS35L56_SPK_VOLUME_0DB); + if (ret) + dev_err(card->dev, "%s limit set failed: %d\n", volume_ctl_name, ret); + + kfree(volume_ctl_name); + return ret; +} +EXPORT_SYMBOL_NS(asoc_sdw_cs35l56_volume_limit, "SND_SOC_SDW_UTILS"); + +int asoc_sdw_cs_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai) +{ + const char *dai_name = rtd->dai_link->codecs->dai_name; + struct snd_soc_card *card = rtd->card; + char codec_name[CODEC_NAME_SIZE]; + char widget_name[16]; + struct snd_soc_dapm_route route = { "Speaker", NULL, widget_name }; + struct snd_soc_dai *codec_dai; + int i, ret; + + snprintf(codec_name, CODEC_NAME_SIZE, "%s", dai_name); + card->components = devm_kasprintf(card->dev, GFP_KERNEL, + "%s spk:%s", + card->components, codec_name); + if (!card->components) + return -ENOMEM; + + for_each_rtd_codec_dais(rtd, i, codec_dai) { + if (!strstr(codec_dai->name, "cs35l56")) + continue; + + snprintf(widget_name, sizeof(widget_name), "%s SPK", + codec_dai->component->name_prefix); + + ret = asoc_sdw_cs35l56_volume_limit(card, codec_dai->component->name_prefix); + if (ret) + return ret; + + ret = snd_soc_dapm_add_routes(&card->dapm, &route, 1); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_rtd_init, "SND_SOC_SDW_UTILS"); + +int asoc_sdw_cs_spk_feedback_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai) +{ + const struct snd_soc_dai_link *dai_link = rtd->dai_link; + const struct snd_soc_dai_link_ch_map *ch_map; + const struct snd_soc_dai_link_component *codec_dlc; + struct snd_soc_dai *codec_dai; + u8 ch_slot[8] = {}; + unsigned int amps_per_bus, ch_per_amp, mask; + int i, ret; + + WARN_ON(dai_link->num_cpus > ARRAY_SIZE(ch_slot)); + + /* + * CS35L56 has 4 TX channels. When the capture is aggregated the + * same bus slots will be allocated to all the amps on a bus. Only + * one amp on that bus can be transmitting in each slot so divide + * the available 4 slots between all the amps on a bus. + */ + amps_per_bus = dai_link->num_codecs / dai_link->num_cpus; + if ((amps_per_bus == 0) || (amps_per_bus > CS_AMP_CHANNELS_PER_AMP)) { + dev_err(rtd->card->dev, "Illegal num_codecs:%u / num_cpus:%u\n", + dai_link->num_codecs, dai_link->num_cpus); + return -EINVAL; + } + + ch_per_amp = CS_AMP_CHANNELS_PER_AMP / amps_per_bus; + + for_each_rtd_ch_maps(rtd, i, ch_map) { + codec_dlc = snd_soc_link_to_codec(rtd->dai_link, i); + codec_dai = snd_soc_find_dai(codec_dlc); + mask = GENMASK(ch_per_amp - 1, 0) << ch_slot[ch_map->cpu]; + + ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, mask, 4, 32); + if (ret < 0) { + dev_err(rtd->card->dev, "Failed to set TDM slot:%d\n", ret); + return ret; + } + + ch_slot[ch_map->cpu] += ch_per_amp; + } + + return 0; +} +EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_feedback_rtd_init, "SND_SOC_SDW_UTILS"); + +int asoc_sdw_cs_amp_init(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_links, + struct asoc_sdw_codec_info *info, + bool playback) +{ + /* Do init on playback link only. */ + if (!playback) + return 0; + + info->amp_num++; + + return 0; +} +EXPORT_SYMBOL_NS(asoc_sdw_cs_amp_init, "SND_SOC_SDW_UTILS"); |