xref: /kernel/linux/linux-6.6/sound/soc/qcom/sdw.c (revision 62306a36) 
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
10int 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}
59EXPORT_SYMBOL_GPL(qcom_snd_sdw_prepare);
60
61int 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}
90EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_params);
91
92int 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}
119EXPORT_SYMBOL_GPL(qcom_snd_sdw_hw_free);
120MODULE_LICENSE("GPL v2");
121