1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// 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,q6afe.h>
#include <linux/module.h>
#include <sound/soc.h>
#include "sdw.h"
/**
* 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);
struct sdw_stream_runtime *sruntime;
struct snd_soc_dai *codec_dai;
int ret, i;
sruntime = sdw_alloc_stream(cpu_dai->name);
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;
}
}
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,
struct sdw_stream_runtime *sruntime,
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);
int ret;
if (!sruntime)
return 0;
switch (cpu_dai->id) {
case WSA_CODEC_DMA_RX_0:
case WSA_CODEC_DMA_RX_1:
case RX_CODEC_DMA_RX_0:
case RX_CODEC_DMA_RX_1:
case TX_CODEC_DMA_TX_0:
case TX_CODEC_DMA_TX_1:
case TX_CODEC_DMA_TX_2:
case TX_CODEC_DMA_TX_3:
break;
default:
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);
int qcom_snd_sdw_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct sdw_stream_runtime **psruntime)
{
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;
switch (cpu_dai->id) {
case WSA_CODEC_DMA_RX_0:
case RX_CODEC_DMA_RX_0:
case RX_CODEC_DMA_RX_1:
case TX_CODEC_DMA_TX_0:
case TX_CODEC_DMA_TX_1:
case TX_CODEC_DMA_TX_2:
case TX_CODEC_DMA_TX_3:
for_each_rtd_codec_dais(rtd, i, codec_dai) {
sruntime = snd_soc_dai_get_stream(codec_dai, substream->stream);
if (sruntime != ERR_PTR(-ENOTSUPP))
*psruntime = sruntime;
}
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_params);
int qcom_snd_sdw_hw_free(struct snd_pcm_substream *substream,
struct sdw_stream_runtime *sruntime, 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);
switch (cpu_dai->id) {
case WSA_CODEC_DMA_RX_0:
case WSA_CODEC_DMA_RX_1:
case RX_CODEC_DMA_RX_0:
case RX_CODEC_DMA_RX_1:
case TX_CODEC_DMA_TX_0:
case TX_CODEC_DMA_TX_1:
case TX_CODEC_DMA_TX_2:
case TX_CODEC_DMA_TX_3:
if (sruntime && *stream_prepared) {
sdw_disable_stream(sruntime);
sdw_deprepare_stream(sruntime);
*stream_prepared = false;
}
break;
default:
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_free);
MODULE_DESCRIPTION("Qualcomm ASoC SoundWire helper functions");
MODULE_LICENSE("GPL");
|
