xref: /openbmc/linux/sound/soc/qcom/sdw.c (revision 66c98360)
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 
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 = asoc_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 
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 = asoc_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 
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 = asoc_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