1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2019 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/module.h>
7 #include <sound/pcm_params.h>
8 #include <sound/soc.h>
9 #include <sound/soc-dai.h>
10
11 #include "meson-codec-glue.h"
12
13 static struct snd_soc_dapm_widget *
14 meson_codec_glue_get_input(struct snd_soc_dapm_widget *w)
15 {
16 struct snd_soc_dapm_path *p;
17 struct snd_soc_dapm_widget *in;
18
19 snd_soc_dapm_widget_for_each_source_path(w, p) {
20 if (!p->connect)
21 continue;
22
23 /* Check that we still are in the same component */
24 if (snd_soc_dapm_to_component(w->dapm) !=
25 snd_soc_dapm_to_component(p->source->dapm))
26 continue;
27
28 if (p->source->id == snd_soc_dapm_dai_in)
29 return p->source;
30
31 in = meson_codec_glue_get_input(p->source);
32 if (in)
33 return in;
34 }
35
36 return NULL;
37 }
38
39 static void meson_codec_glue_input_set_data(struct snd_soc_dai *dai,
40 struct meson_codec_glue_input *data)
41 {
42 snd_soc_dai_dma_data_set_playback(dai, data);
43 }
44
45 struct meson_codec_glue_input *
46 meson_codec_glue_input_get_data(struct snd_soc_dai *dai)
47 {
48 return snd_soc_dai_dma_data_get_playback(dai);
49 }
50 EXPORT_SYMBOL_GPL(meson_codec_glue_input_get_data);
51
52 static struct meson_codec_glue_input *
53 meson_codec_glue_output_get_input_data(struct snd_soc_dapm_widget *w)
54 {
55 struct snd_soc_dapm_widget *in =
56 meson_codec_glue_get_input(w);
57 struct snd_soc_dai *dai;
58
59 if (WARN_ON(!in))
60 return NULL;
61
62 dai = in->priv;
63
64 return meson_codec_glue_input_get_data(dai);
65 }
66
67 int meson_codec_glue_input_hw_params(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params *params,
69 struct snd_soc_dai *dai)
70 {
71 struct meson_codec_glue_input *data =
72 meson_codec_glue_input_get_data(dai);
73
74 data->params.rates = snd_pcm_rate_to_rate_bit(params_rate(params));
75 data->params.rate_min = params_rate(params);
76 data->params.rate_max = params_rate(params);
77 data->params.formats = 1ULL << (__force int) params_format(params);
78 data->params.channels_min = params_channels(params);
79 data->params.channels_max = params_channels(params);
80 data->params.sig_bits = dai->driver->playback.sig_bits;
81
82 return 0;
83 }
84 EXPORT_SYMBOL_GPL(meson_codec_glue_input_hw_params);
85
86 int meson_codec_glue_input_set_fmt(struct snd_soc_dai *dai,
87 unsigned int fmt)
88 {
89 struct meson_codec_glue_input *data =
90 meson_codec_glue_input_get_data(dai);
91
92 /* Save the source stream format for the downstream link */
93 data->fmt = fmt;
94 return 0;
95 }
96 EXPORT_SYMBOL_GPL(meson_codec_glue_input_set_fmt);
97
98 int meson_codec_glue_output_startup(struct snd_pcm_substream *substream,
99 struct snd_soc_dai *dai)
100 {
101 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
102 struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget_capture(dai);
103 struct meson_codec_glue_input *in_data = meson_codec_glue_output_get_input_data(w);
104
105 if (!in_data)
106 return -ENODEV;
107
108 if (WARN_ON(!rtd->dai_link->c2c_params)) {
109 dev_warn(dai->dev, "codec2codec link expected\n");
110 return -EINVAL;
111 }
112
113 /* Replace link params with the input params */
114 rtd->dai_link->c2c_params = &in_data->params;
115 rtd->dai_link->num_c2c_params = 1;
116
117 return snd_soc_runtime_set_dai_fmt(rtd, in_data->fmt);
118 }
119 EXPORT_SYMBOL_GPL(meson_codec_glue_output_startup);
120
121 int meson_codec_glue_input_dai_probe(struct snd_soc_dai *dai)
122 {
123 struct meson_codec_glue_input *data;
124
125 data = kzalloc(sizeof(*data), GFP_KERNEL);
126 if (!data)
127 return -ENOMEM;
128
129 meson_codec_glue_input_set_data(dai, data);
130 return 0;
131 }
132 EXPORT_SYMBOL_GPL(meson_codec_glue_input_dai_probe);
133
134 int meson_codec_glue_input_dai_remove(struct snd_soc_dai *dai)
135 {
136 struct meson_codec_glue_input *data =
137 meson_codec_glue_input_get_data(dai);
138
139 kfree(data);
140 return 0;
141 }
142 EXPORT_SYMBOL_GPL(meson_codec_glue_input_dai_remove);
143
144 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
145 MODULE_DESCRIPTION("Amlogic Codec Glue Helpers");
146 MODULE_LICENSE("GPL v2");
147
148
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