1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2018, Linaro Limited.
3 // Copyright (c) 2018, The Linux Foundation. All rights reserved.
4
5 #include <linux/module.h>
6 #include <sound/soc.h>
7 #include "qdsp6/q6afe.h"
8 #include "sdw.h"
9
qcom_snd_sdw_prepare(struct snd_pcm_substream * substream,struct sdw_stream_runtime * sruntime,bool * stream_prepared)10 int qcom_snd_sdw_prepare(struct snd_pcm_substream *substream,
11 struct sdw_stream_runtime *sruntime,
12 bool *stream_prepared)
13 {
14 struct snd_soc_pcm_runtime *rtd = substream->private_data;
15 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
16 int ret;
17
18 if (!sruntime)
19 return 0;
20
21 switch (cpu_dai->id) {
22 case WSA_CODEC_DMA_RX_0:
23 case WSA_CODEC_DMA_RX_1:
24 case RX_CODEC_DMA_RX_0:
25 case RX_CODEC_DMA_RX_1:
26 case TX_CODEC_DMA_TX_0:
27 case TX_CODEC_DMA_TX_1:
28 case TX_CODEC_DMA_TX_2:
29 case TX_CODEC_DMA_TX_3:
30 break;
31 default:
32 return 0;
33 }
34
35 if (*stream_prepared)
36 return 0;
37
38 ret = sdw_prepare_stream(sruntime);
39 if (ret)
40 return ret;
41
42 /**
43 * NOTE: there is a strict hw requirement about the ordering of port
44 * enables and actual WSA881x PA enable. PA enable should only happen
45 * after soundwire ports are enabled if not DC on the line is
46 * accumulated resulting in Click/Pop Noise
47 * PA enable/mute are handled as part of codec DAPM and digital mute.
48 */
49
50 ret = sdw_enable_stream(sruntime);
51 if (ret) {
52 sdw_deprepare_stream(sruntime);
53 return ret;
54 }
55 *stream_prepared = true;
56
57 return ret;
58 }
59 EXPORT_SYMBOL_GPL(qcom_snd_sdw_prepare);
60
qcom_snd_sdw_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct sdw_stream_runtime ** psruntime)61 int qcom_snd_sdw_hw_params(struct snd_pcm_substream *substream,
62 struct snd_pcm_hw_params *params,
63 struct sdw_stream_runtime **psruntime)
64 {
65 struct snd_soc_pcm_runtime *rtd = substream->private_data;
66 struct snd_soc_dai *codec_dai;
67 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
68 struct sdw_stream_runtime *sruntime;
69 int i;
70
71 switch (cpu_dai->id) {
72 case WSA_CODEC_DMA_RX_0:
73 case RX_CODEC_DMA_RX_0:
74 case RX_CODEC_DMA_RX_1:
75 case TX_CODEC_DMA_TX_0:
76 case TX_CODEC_DMA_TX_1:
77 case TX_CODEC_DMA_TX_2:
78 case TX_CODEC_DMA_TX_3:
79 for_each_rtd_codec_dais(rtd, i, codec_dai) {
80 sruntime = snd_soc_dai_get_stream(codec_dai, substream->stream);
81 if (sruntime != ERR_PTR(-ENOTSUPP))
82 *psruntime = sruntime;
83 }
84 break;
85 }
86
87 return 0;
88
89 }
90 EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_params);
91
qcom_snd_sdw_hw_free(struct snd_pcm_substream * substream,struct sdw_stream_runtime * sruntime,bool * stream_prepared)92 int qcom_snd_sdw_hw_free(struct snd_pcm_substream *substream,
93 struct sdw_stream_runtime *sruntime, bool *stream_prepared)
94 {
95 struct snd_soc_pcm_runtime *rtd = substream->private_data;
96 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
97
98 switch (cpu_dai->id) {
99 case WSA_CODEC_DMA_RX_0:
100 case WSA_CODEC_DMA_RX_1:
101 case RX_CODEC_DMA_RX_0:
102 case RX_CODEC_DMA_RX_1:
103 case TX_CODEC_DMA_TX_0:
104 case TX_CODEC_DMA_TX_1:
105 case TX_CODEC_DMA_TX_2:
106 case TX_CODEC_DMA_TX_3:
107 if (sruntime && *stream_prepared) {
108 sdw_disable_stream(sruntime);
109 sdw_deprepare_stream(sruntime);
110 *stream_prepared = false;
111 }
112 break;
113 default:
114 break;
115 }
116
117 return 0;
118 }
119 EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_free);
120 MODULE_LICENSE("GPL v2");
121