2 * soc-compress.c -- ALSA SoC Compress
4 * Copyright (C) 2012 Intel Corp.
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>
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.
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>
28 static int soc_compr_open(struct snd_compr_stream
*cstream
)
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
;
36 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->open
) {
37 ret
= platform
->driver
->compr_ops
->open(cstream
);
39 pr_err("compress asoc: can't open platform %s\n", platform
->name
);
44 if (rtd
->dai_link
->compr_ops
&& rtd
->dai_link
->compr_ops
->startup
) {
45 ret
= rtd
->dai_link
->compr_ops
->startup(cstream
);
47 pr_err("compress asoc: %s startup failed\n", rtd
->dai_link
->name
);
52 if (cstream
->direction
== SND_COMPRESS_PLAYBACK
) {
53 cpu_dai
->playback_active
++;
54 codec_dai
->playback_active
++;
56 cpu_dai
->capture_active
++;
57 codec_dai
->capture_active
++;
67 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->free
)
68 platform
->driver
->compr_ops
->free(cstream
);
73 static int soc_compr_free(struct snd_compr_stream
*cstream
)
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
;
81 if (cstream
->direction
== SND_COMPRESS_PLAYBACK
) {
82 cpu_dai
->playback_active
--;
83 codec_dai
->playback_active
--;
85 cpu_dai
->capture_active
--;
86 codec_dai
->capture_active
--;
89 snd_soc_dai_digital_mute(codec_dai
, 1);
98 if (!codec_dai
->active
)
102 if (rtd
->dai_link
->compr_ops
&& rtd
->dai_link
->compr_ops
->shutdown
)
103 rtd
->dai_link
->compr_ops
->shutdown(cstream
);
105 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->free
)
106 platform
->driver
->compr_ops
->free(cstream
);
107 cpu_dai
->runtime
= NULL
;
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
);
116 codec_dai
->pop_wait
= 1;
117 schedule_delayed_work(&rtd
->delayed_work
,
118 msecs_to_jiffies(rtd
->pmdown_time
));
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
);
129 static int soc_compr_trigger(struct snd_compr_stream
*cstream
, int cmd
)
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
;
137 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->trigger
) {
138 ret
= platform
->driver
->compr_ops
->trigger(cstream
, cmd
);
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);
151 static int soc_compr_set_params(struct snd_compr_stream
*cstream
,
152 struct snd_compr_params
*params
)
154 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
155 struct snd_soc_platform
*platform
= rtd
->platform
;
158 /* first we call set_params for the platform driver
159 * this should configure the soc side
160 * if the machine has compressed ops then we call that as well
161 * expectation is that platform and machine will configure everything
162 * for this compress path, like configuring pcm port for codec
164 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->set_params
) {
165 ret
= platform
->driver
->compr_ops
->set_params(cstream
, params
);
170 if (rtd
->dai_link
->compr_ops
&& rtd
->dai_link
->compr_ops
->set_params
) {
171 ret
= rtd
->dai_link
->compr_ops
->set_params(cstream
);
176 snd_soc_dapm_stream_event(rtd
, SNDRV_PCM_STREAM_PLAYBACK
,
177 SND_SOC_DAPM_STREAM_START
);
182 static int soc_compr_get_params(struct snd_compr_stream
*cstream
,
183 struct snd_codec
*params
)
185 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
186 struct snd_soc_platform
*platform
= rtd
->platform
;
189 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->get_params
)
190 ret
= platform
->driver
->compr_ops
->get_params(cstream
, params
);
195 static int soc_compr_get_caps(struct snd_compr_stream
*cstream
,
196 struct snd_compr_caps
*caps
)
198 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
199 struct snd_soc_platform
*platform
= rtd
->platform
;
202 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->get_caps
)
203 ret
= platform
->driver
->compr_ops
->get_caps(cstream
, caps
);
208 static int soc_compr_get_codec_caps(struct snd_compr_stream
*cstream
,
209 struct snd_compr_codec_caps
*codec
)
211 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
212 struct snd_soc_platform
*platform
= rtd
->platform
;
215 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->get_codec_caps
)
216 ret
= platform
->driver
->compr_ops
->get_codec_caps(cstream
, codec
);
221 static int soc_compr_ack(struct snd_compr_stream
*cstream
, size_t bytes
)
223 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
224 struct snd_soc_platform
*platform
= rtd
->platform
;
227 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->ack
)
228 ret
= platform
->driver
->compr_ops
->ack(cstream
, bytes
);
233 static int soc_compr_pointer(struct snd_compr_stream
*cstream
,
234 struct snd_compr_tstamp
*tstamp
)
236 struct snd_soc_pcm_runtime
*rtd
= cstream
->private_data
;
237 struct snd_soc_platform
*platform
= rtd
->platform
;
239 if (platform
->driver
->compr_ops
&& platform
->driver
->compr_ops
->pointer
)
240 platform
->driver
->compr_ops
->pointer(cstream
, tstamp
);
245 /* ASoC Compress operations */
246 static struct snd_compr_ops soc_compr_ops
= {
247 .open
= soc_compr_open
,
248 .free
= soc_compr_free
,
249 .set_params
= soc_compr_set_params
,
250 .get_params
= soc_compr_get_params
,
251 .trigger
= soc_compr_trigger
,
252 .pointer
= soc_compr_pointer
,
253 .ack
= soc_compr_ack
,
254 .get_caps
= soc_compr_get_caps
,
255 .get_codec_caps
= soc_compr_get_codec_caps
258 /* create a new compress */
259 int soc_new_compress(struct snd_soc_pcm_runtime
*rtd
, int num
)
261 struct snd_soc_codec
*codec
= rtd
->codec
;
262 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
263 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
264 struct snd_compr
*compr
;
266 int ret
= 0, direction
= 0;
268 /* check client and interface hw capabilities */
269 snprintf(new_name
, sizeof(new_name
), "%s %s-%d",
270 rtd
->dai_link
->stream_name
, codec_dai
->name
, num
);
271 direction
= SND_COMPRESS_PLAYBACK
;
272 compr
= kzalloc(sizeof(*compr
), GFP_KERNEL
);
274 snd_printk(KERN_ERR
"Cannot allocate compr\n");
278 compr
->ops
= &soc_compr_ops
;
279 mutex_init(&compr
->lock
);
280 ret
= snd_compress_new(rtd
->card
->snd_card
, num
, direction
, compr
);
282 pr_err("compress asoc: can't create compress for codec %s\n",
289 compr
->private_data
= rtd
;
291 printk(KERN_INFO
"compress asoc: %s <-> %s mapping ok\n", codec_dai
->name
,