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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018-2023, Linaro Limited.
// Copyright (c) 2018, The Linux Foundation. All rights reserved.
#include <dt-bindings/sound/qcom,lpass.h>
#include <dt-bindings/sound/qcom,q6afe.h>
#include <linux/module.h>
#include <sound/soc.h>
#include "sdw.h"
static bool qcom_snd_is_sdw_dai(int id)
{
switch (id) {
case WSA_CODEC_DMA_RX_0:
case WSA_CODEC_DMA_TX_0:
case WSA_CODEC_DMA_RX_1:
case WSA_CODEC_DMA_TX_1:
case WSA_CODEC_DMA_TX_2:
case RX_CODEC_DMA_RX_0:
case TX_CODEC_DMA_TX_0:
case RX_CODEC_DMA_RX_1:
case TX_CODEC_DMA_TX_1:
case RX_CODEC_DMA_RX_2:
case TX_CODEC_DMA_TX_2:
case RX_CODEC_DMA_RX_3:
case TX_CODEC_DMA_TX_3:
case RX_CODEC_DMA_RX_4:
case TX_CODEC_DMA_TX_4:
case RX_CODEC_DMA_RX_5:
case TX_CODEC_DMA_TX_5:
case RX_CODEC_DMA_RX_6:
case RX_CODEC_DMA_RX_7:
case SLIMBUS_0_RX...SLIMBUS_6_TX:
return true;
default:
break;
}
/* DSP Bypass usecase, cpu dai index overlaps with DSP dai ids,
* DO NOT MERGE into top switch case */
switch (id) {
case LPASS_CDC_DMA_TX3:
case LPASS_CDC_DMA_RX0:
return true;
default:
break;
}
return false;
}
/**
* qcom_snd_sdw_startup() - Helper to start Soundwire stream for SoC audio card
* @substream: The PCM substream from audio, as passed to snd_soc_ops->startup()
*
* Helper for the SoC audio card (snd_soc_ops->startup()) to allocate and set
* Soundwire stream runtime to each codec DAI.
*
* The shutdown() callback should call sdw_release_stream() on the same
* sdw_stream_runtime.
*
* Return: 0 or errno
*/
int qcom_snd_sdw_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
u32 rx_ch[SDW_MAX_PORTS], tx_ch[SDW_MAX_PORTS];
struct sdw_stream_runtime *sruntime;
struct snd_soc_dai *codec_dai;
u32 rx_ch_cnt = 0, tx_ch_cnt = 0;
int ret, i, j;
if (!qcom_snd_is_sdw_dai(cpu_dai->id))
return 0;
sruntime = sdw_alloc_stream(cpu_dai->name, SDW_STREAM_PCM);
if (!sruntime)
return -ENOMEM;
for_each_rtd_codec_dais(rtd, i, codec_dai) {
ret = snd_soc_dai_set_stream(codec_dai, sruntime,
substream->stream);
if (ret < 0 && ret != -ENOTSUPP) {
dev_err(rtd->dev, "Failed to set sdw stream on %s\n", codec_dai->name);
goto err_set_stream;
} else if (ret == -ENOTSUPP) {
/* Ignore unsupported */
continue;
}
ret = snd_soc_dai_get_channel_map(codec_dai, &tx_ch_cnt, tx_ch,
&rx_ch_cnt, rx_ch);
if (ret != 0 && ret != -ENOTSUPP) {
dev_err(rtd->dev, "Failed to get codec chan map %s\n", codec_dai->name);
goto err_set_stream;
} else if (ret == -ENOTSUPP) {
/* Ignore unsupported */
continue;
}
}
switch (cpu_dai->id) {
case RX_CODEC_DMA_RX_0:
case TX_CODEC_DMA_TX_3:
if (tx_ch_cnt || rx_ch_cnt) {
for_each_rtd_codec_dais(rtd, j, codec_dai) {
ret = snd_soc_dai_set_channel_map(codec_dai,
tx_ch_cnt, tx_ch,
rx_ch_cnt, rx_ch);
if (ret != 0 && ret != -ENOTSUPP)
goto err_set_stream;
}
}
}
return 0;
err_set_stream:
sdw_release_stream(sruntime);
return ret;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_startup);
int qcom_snd_sdw_prepare(struct snd_pcm_substream *substream,
bool *stream_prepared)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct sdw_stream_runtime *sruntime;
int ret;
if (!qcom_snd_is_sdw_dai(cpu_dai->id))
return 0;
sruntime = qcom_snd_sdw_get_stream(substream);
if (!sruntime)
return 0;
if (*stream_prepared)
return 0;
ret = sdw_prepare_stream(sruntime);
if (ret)
return ret;
/**
* NOTE: there is a strict hw requirement about the ordering of port
* enables and actual WSA881x PA enable. PA enable should only happen
* after soundwire ports are enabled if not DC on the line is
* accumulated resulting in Click/Pop Noise
* PA enable/mute are handled as part of codec DAPM and digital mute.
*/
ret = sdw_enable_stream(sruntime);
if (ret) {
sdw_deprepare_stream(sruntime);
return ret;
}
*stream_prepared = true;
return ret;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_prepare);
struct sdw_stream_runtime *qcom_snd_sdw_get_stream(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai;
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct sdw_stream_runtime *sruntime;
int i;
if (!qcom_snd_is_sdw_dai(cpu_dai->id))
return NULL;
for_each_rtd_codec_dais(rtd, i, codec_dai) {
sruntime = snd_soc_dai_get_stream(codec_dai, substream->stream);
if (sruntime != ERR_PTR(-ENOTSUPP))
return sruntime;
}
return NULL;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_get_stream);
void qcom_snd_sdw_shutdown(struct snd_pcm_substream *substream)
{
struct sdw_stream_runtime *sruntime = qcom_snd_sdw_get_stream(substream);
sdw_release_stream(sruntime);
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_shutdown);
int qcom_snd_sdw_hw_free(struct snd_pcm_substream *substream, bool *stream_prepared)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct sdw_stream_runtime *sruntime;
if (!qcom_snd_is_sdw_dai(cpu_dai->id))
return 0;
sruntime = qcom_snd_sdw_get_stream(substream);
if (sruntime && *stream_prepared) {
sdw_disable_stream(sruntime);
sdw_deprepare_stream(sruntime);
*stream_prepared = false;
}
return 0;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_free);
MODULE_DESCRIPTION("Qualcomm ASoC SoundWire helper functions");
MODULE_LICENSE("GPL");
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