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-rw-r--r--sound/soc/soc-compress.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
new file mode 100644
index 000000000000..88d85badd932
--- /dev/null
+++ b/sound/soc/soc-compress.c
@@ -0,0 +1,295 @@
1/*
2 * soc-compress.c -- ALSA SoC Compress
3 *
4 * Copyright (C) 2012 Intel Corp.
5 *
6 * Authors: Namarta Kohli <namartax.kohli@intel.com>
7 * Ramesh Babu K V <ramesh.babu@linux.intel.com>
8 * Vinod Koul <vinod.koul@linux.intel.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/init.h>
19#include <linux/delay.h>
20#include <linux/slab.h>
21#include <linux/workqueue.h>
22#include <sound/core.h>
23#include <sound/compress_params.h>
24#include <sound/compress_driver.h>
25#include <sound/soc.h>
26#include <sound/initval.h>
27
28static int soc_compr_open(struct snd_compr_stream *cstream)
29{
30 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
31 struct snd_soc_platform *platform = rtd->platform;
32 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
33 struct snd_soc_dai *codec_dai = rtd->codec_dai;
34 int ret = 0;
35
36 if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
37 ret = platform->driver->compr_ops->open(cstream);
38 if (ret < 0) {
39 pr_err("compress asoc: can't open platform %s\n", platform->name);
40 goto out;
41 }
42 }
43
44 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
45 ret = rtd->dai_link->compr_ops->startup(cstream);
46 if (ret < 0) {
47 pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
48 goto machine_err;
49 }
50 }
51
52 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
53 cpu_dai->playback_active++;
54 codec_dai->playback_active++;
55 } else {
56 cpu_dai->capture_active++;
57 codec_dai->capture_active++;
58 }
59
60 cpu_dai->active++;
61 codec_dai->active++;
62 rtd->codec->active++;
63
64 return 0;
65
66machine_err:
67 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
68 platform->driver->compr_ops->free(cstream);
69out:
70 return ret;
71}
72
73static int soc_compr_free(struct snd_compr_stream *cstream)
74{
75 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
76 struct snd_soc_platform *platform = rtd->platform;
77 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
78 struct snd_soc_dai *codec_dai = rtd->codec_dai;
79 struct snd_soc_codec *codec = rtd->codec;
80
81 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
82 cpu_dai->playback_active--;
83 codec_dai->playback_active--;
84 } else {
85 cpu_dai->capture_active--;
86 codec_dai->capture_active--;
87 }
88
89 snd_soc_dai_digital_mute(codec_dai, 1);
90
91 cpu_dai->active--;
92 codec_dai->active--;
93 codec->active--;
94
95 if (!cpu_dai->active)
96 cpu_dai->rate = 0;
97
98 if (!codec_dai->active)
99 codec_dai->rate = 0;
100
101
102 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
103 rtd->dai_link->compr_ops->shutdown(cstream);
104
105 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
106 platform->driver->compr_ops->free(cstream);
107 cpu_dai->runtime = NULL;
108
109 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
110 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
111 rtd->dai_link->ignore_pmdown_time) {
112 snd_soc_dapm_stream_event(rtd,
113 SNDRV_PCM_STREAM_PLAYBACK,
114 SND_SOC_DAPM_STREAM_STOP);
115 } else
116 codec_dai->pop_wait = 1;
117 schedule_delayed_work(&rtd->delayed_work,
118 msecs_to_jiffies(rtd->pmdown_time));
119 } else {
120 /* capture streams can be powered down now */
121 snd_soc_dapm_stream_event(rtd,
122 SNDRV_PCM_STREAM_CAPTURE,
123 SND_SOC_DAPM_STREAM_STOP);
124 }
125
126 return 0;
127}
128
129static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
130{
131
132 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
133 struct snd_soc_platform *platform = rtd->platform;
134 struct snd_soc_dai *codec_dai = rtd->codec_dai;
135 int ret = 0;
136
137 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
138 ret = platform->driver->compr_ops->trigger(cstream, cmd);
139 if (ret < 0)
140 return ret;
141 }
142
143 if (cmd == SNDRV_PCM_TRIGGER_START)
144 snd_soc_dai_digital_mute(codec_dai, 0);
145 else if (cmd == SNDRV_PCM_TRIGGER_STOP)
146 snd_soc_dai_digital_mute(codec_dai, 1);
147
148 return ret;
149}
150
151static int soc_compr_set_params(struct snd_compr_stream *cstream,
152 struct snd_compr_params *params)
153{
154 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
155 struct snd_soc_platform *platform = rtd->platform;
156 struct snd_soc_dai *codec_dai = rtd->codec_dai;
157 int ret = 0;
158
159 /* first we call set_params for the platform driver
160 * this should configure the soc side
161 * if the machine has compressed ops then we call that as well
162 * expectation is that platform and machine will configure everything
163 * for this compress path, like configuring pcm port for codec
164 */
165 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
166 ret = platform->driver->compr_ops->set_params(cstream, params);
167 if (ret < 0)
168 return ret;
169 }
170
171 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
172 ret = rtd->dai_link->compr_ops->set_params(cstream);
173 if (ret < 0)
174 return ret;
175 }
176
177 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
178 SND_SOC_DAPM_STREAM_START);
179
180 return ret;
181}
182
183static int soc_compr_get_params(struct snd_compr_stream *cstream,
184 struct snd_codec *params)
185{
186 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
187 struct snd_soc_platform *platform = rtd->platform;
188 int ret = 0;
189
190 if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
191 ret = platform->driver->compr_ops->get_params(cstream, params);
192
193 return ret;
194}
195
196static int soc_compr_get_caps(struct snd_compr_stream *cstream,
197 struct snd_compr_caps *caps)
198{
199 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
200 struct snd_soc_platform *platform = rtd->platform;
201 int ret = 0;
202
203 if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
204 ret = platform->driver->compr_ops->get_caps(cstream, caps);
205
206 return ret;
207}
208
209static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
210 struct snd_compr_codec_caps *codec)
211{
212 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
213 struct snd_soc_platform *platform = rtd->platform;
214 int ret = 0;
215
216 if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
217 ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
218
219 return ret;
220}
221
222static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
223{
224 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
225 struct snd_soc_platform *platform = rtd->platform;
226 int ret = 0;
227
228 if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
229 ret = platform->driver->compr_ops->ack(cstream, bytes);
230
231 return ret;
232}
233
234static int soc_compr_pointer(struct snd_compr_stream *cstream,
235 struct snd_compr_tstamp *tstamp)
236{
237 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
238 struct snd_soc_platform *platform = rtd->platform;
239
240 if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
241 platform->driver->compr_ops->pointer(cstream, tstamp);
242
243 return 0;
244}
245
246/* ASoC Compress operations */
247static struct snd_compr_ops soc_compr_ops = {
248 .open = soc_compr_open,
249 .free = soc_compr_free,
250 .set_params = soc_compr_set_params,
251 .get_params = soc_compr_get_params,
252 .trigger = soc_compr_trigger,
253 .pointer = soc_compr_pointer,
254 .ack = soc_compr_ack,
255 .get_caps = soc_compr_get_caps,
256 .get_codec_caps = soc_compr_get_codec_caps
257};
258
259/* create a new compress */
260int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
261{
262 struct snd_soc_codec *codec = rtd->codec;
263 struct snd_soc_dai *codec_dai = rtd->codec_dai;
264 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
265 struct snd_compr *compr;
266 char new_name[64];
267 int ret = 0, direction = 0;
268
269 /* check client and interface hw capabilities */
270 snprintf(new_name, sizeof(new_name), "%s %s-%d",
271 rtd->dai_link->stream_name, codec_dai->name, num);
272 direction = SND_COMPRESS_PLAYBACK;
273 compr = kzalloc(sizeof(*compr), GFP_KERNEL);
274 if (compr == NULL) {
275 snd_printk(KERN_ERR "Cannot allocate compr\n");
276 return -ENOMEM;
277 }
278
279 compr->ops = &soc_compr_ops;
280 mutex_init(&compr->lock);
281 ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
282 if (ret < 0) {
283 pr_err("compress asoc: can't create compress for codec %s\n",
284 codec->name);
285 kfree(compr);
286 return ret;
287 }
288
289 rtd->compr = compr;
290 compr->private_data = rtd;
291
292 printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,
293 cpu_dai->name);
294 return ret;
295}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-01 02:43:59 -0400