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// SPDX-License-Identifier: GPL-2.0-only
// This file incorporates work covered by the following copyright notice:
// Copyright (c) 2020 Intel Corporation
// Copyright(c) 2024 Advanced Micro Devices, Inc.
/*
* soc-sdw-utils.c - common SoundWire machine driver helper functions
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <sound/soc_sdw_utils.h>
/* these wrappers are only needed to avoid typecast compilation errors */
int asoc_sdw_startup(struct snd_pcm_substream *substream)
{
return sdw_startup_stream(substream);
}
EXPORT_SYMBOL_NS(asoc_sdw_startup, SND_SOC_SDW_UTILS);
int asoc_sdw_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct sdw_stream_runtime *sdw_stream;
struct snd_soc_dai *dai;
/* Find stream from first CPU DAI */
dai = snd_soc_rtd_to_cpu(rtd, 0);
sdw_stream = snd_soc_dai_get_stream(dai, substream->stream);
if (IS_ERR(sdw_stream)) {
dev_err(rtd->dev, "no stream found for DAI %s\n", dai->name);
return PTR_ERR(sdw_stream);
}
return sdw_prepare_stream(sdw_stream);
}
EXPORT_SYMBOL_NS(asoc_sdw_prepare, SND_SOC_SDW_UTILS);
int asoc_sdw_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct sdw_stream_runtime *sdw_stream;
struct snd_soc_dai *dai;
int ret;
/* Find stream from first CPU DAI */
dai = snd_soc_rtd_to_cpu(rtd, 0);
sdw_stream = snd_soc_dai_get_stream(dai, substream->stream);
if (IS_ERR(sdw_stream)) {
dev_err(rtd->dev, "no stream found for DAI %s\n", dai->name);
return PTR_ERR(sdw_stream);
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
ret = sdw_enable_stream(sdw_stream);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
ret = sdw_disable_stream(sdw_stream);
break;
default:
ret = -EINVAL;
break;
}
if (ret)
dev_err(rtd->dev, "%s trigger %d failed: %d\n", __func__, cmd, ret);
return ret;
}
EXPORT_SYMBOL_NS(asoc_sdw_trigger, SND_SOC_SDW_UTILS);
int asoc_sdw_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai_link_ch_map *ch_maps;
int ch = params_channels(params);
unsigned int ch_mask;
int num_codecs;
int step;
int i;
if (!rtd->dai_link->ch_maps)
return 0;
/* Identical data will be sent to all codecs in playback */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ch_mask = GENMASK(ch - 1, 0);
step = 0;
} else {
num_codecs = rtd->dai_link->num_codecs;
if (ch < num_codecs || ch % num_codecs != 0) {
dev_err(rtd->dev, "Channels number %d is invalid when codec number = %d\n",
ch, num_codecs);
return -EINVAL;
}
ch_mask = GENMASK(ch / num_codecs - 1, 0);
step = hweight_long(ch_mask);
}
/*
* The captured data will be combined from each cpu DAI if the dai
* link has more than one codec DAIs. Set codec channel mask and
* ASoC will set the corresponding channel numbers for each cpu dai.
*/
for_each_link_ch_maps(rtd->dai_link, i, ch_maps)
ch_maps->ch_mask = ch_mask << (i * step);
return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_hw_params, SND_SOC_SDW_UTILS);
int asoc_sdw_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct sdw_stream_runtime *sdw_stream;
struct snd_soc_dai *dai;
/* Find stream from first CPU DAI */
dai = snd_soc_rtd_to_cpu(rtd, 0);
sdw_stream = snd_soc_dai_get_stream(dai, substream->stream);
if (IS_ERR(sdw_stream)) {
dev_err(rtd->dev, "no stream found for DAI %s\n", dai->name);
return PTR_ERR(sdw_stream);
}
return sdw_deprepare_stream(sdw_stream);
}
EXPORT_SYMBOL_NS(asoc_sdw_hw_free, SND_SOC_SDW_UTILS);
void asoc_sdw_shutdown(struct snd_pcm_substream *substream)
{
sdw_shutdown_stream(substream);
}
EXPORT_SYMBOL_NS(asoc_sdw_shutdown, SND_SOC_SDW_UTILS);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SoundWire ASoC helpers");
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