1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-pcm.c -- ALSA SoC PCM
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/soc-link.h>
28 #include <sound/initval.h>
30 #define DPCM_MAX_BE_USERS 8
32 #ifdef CONFIG_DEBUG_FS
33 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
36 case SND_SOC_DPCM_STATE_NEW:
38 case SND_SOC_DPCM_STATE_OPEN:
40 case SND_SOC_DPCM_STATE_HW_PARAMS:
42 case SND_SOC_DPCM_STATE_PREPARE:
44 case SND_SOC_DPCM_STATE_START:
46 case SND_SOC_DPCM_STATE_STOP:
48 case SND_SOC_DPCM_STATE_SUSPEND:
50 case SND_SOC_DPCM_STATE_PAUSED:
52 case SND_SOC_DPCM_STATE_HW_FREE:
54 case SND_SOC_DPCM_STATE_CLOSE:
61 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
62 int stream, char *buf, size_t size)
64 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
65 struct snd_soc_dpcm *dpcm;
70 offset += scnprintf(buf + offset, size - offset,
71 "[%s - %s]\n", fe->dai_link->name,
72 stream ? "Capture" : "Playback");
74 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
75 dpcm_state_string(fe->dpcm[stream].state));
77 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
78 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
79 offset += scnprintf(buf + offset, size - offset,
81 "Format = %s, Channels = %d, Rate = %d\n",
82 snd_pcm_format_name(params_format(params)),
83 params_channels(params),
87 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
89 if (list_empty(&fe->dpcm[stream].be_clients)) {
90 offset += scnprintf(buf + offset, size - offset,
91 " No active DSP links\n");
95 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
96 for_each_dpcm_be(fe, stream, dpcm) {
97 struct snd_soc_pcm_runtime *be = dpcm->be;
98 params = &dpcm->hw_params;
100 offset += scnprintf(buf + offset, size - offset,
101 "- %s\n", be->dai_link->name);
103 offset += scnprintf(buf + offset, size - offset,
105 dpcm_state_string(be->dpcm[stream].state));
107 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
108 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
109 offset += scnprintf(buf + offset, size - offset,
111 "Format = %s, Channels = %d, Rate = %d\n",
112 snd_pcm_format_name(params_format(params)),
113 params_channels(params),
114 params_rate(params));
116 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
121 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
122 size_t count, loff_t *ppos)
124 struct snd_soc_pcm_runtime *fe = file->private_data;
125 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
129 if (fe->num_cpus > 1) {
131 "%s doesn't support Multi CPU yet\n", __func__);
135 buf = kmalloc(out_count, GFP_KERNEL);
139 for_each_pcm_streams(stream)
140 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
141 offset += dpcm_show_state(fe, stream,
145 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
151 static const struct file_operations dpcm_state_fops = {
153 .read = dpcm_state_read_file,
154 .llseek = default_llseek,
157 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
162 if (!rtd->dai_link->dynamic)
165 if (!rtd->card->debugfs_card_root)
168 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
169 rtd->card->debugfs_card_root);
171 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
172 rtd, &dpcm_state_fops);
175 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
179 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
180 stream ? "capture" : "playback");
182 dpcm->debugfs_state = debugfs_create_dir(
183 name, dpcm->fe->debugfs_dpcm_root);
184 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
190 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
192 debugfs_remove_recursive(dpcm->debugfs_state);
196 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
201 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
206 /* Set FE's runtime_update state; the state is protected via PCM stream lock
207 * for avoiding the race with trigger callback.
208 * If the state is unset and a trigger is pending while the previous operation,
209 * process the pending trigger action here.
211 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
212 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
213 int stream, enum snd_soc_dpcm_update state)
215 struct snd_pcm_substream *substream =
216 snd_soc_dpcm_get_substream(fe, stream);
218 snd_pcm_stream_lock_irq(substream);
219 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
220 dpcm_fe_dai_do_trigger(substream,
221 fe->dpcm[stream].trigger_pending - 1);
222 fe->dpcm[stream].trigger_pending = 0;
224 fe->dpcm[stream].runtime_update = state;
225 snd_pcm_stream_unlock_irq(substream);
228 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
229 int stream, enum snd_soc_dpcm_update state)
231 be->dpcm[stream].runtime_update = state;
235 * snd_soc_runtime_action() - Increment/Decrement active count for
236 * PCM runtime components
237 * @rtd: ASoC PCM runtime that is activated
238 * @stream: Direction of the PCM stream
239 * @action: Activate stream if 1. Deactivate if -1.
241 * Increments/Decrements the active count for all the DAIs and components
242 * attached to a PCM runtime.
243 * Should typically be called when a stream is opened.
245 * Must be called with the rtd->card->pcm_mutex being held
247 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
248 int stream, int action)
250 struct snd_soc_dai *dai;
253 lockdep_assert_held(&rtd->card->pcm_mutex);
255 for_each_rtd_dais(rtd, i, dai)
256 snd_soc_dai_action(dai, stream, action);
258 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
261 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
262 * @rtd: The ASoC PCM runtime that should be checked.
264 * This function checks whether the power down delay should be ignored for a
265 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
266 * been configured to ignore the delay, or if none of the components benefits
267 * from having the delay.
269 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
271 struct snd_soc_component *component;
275 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
278 for_each_rtd_components(rtd, i, component)
279 ignore &= !component->driver->use_pmdown_time;
285 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
286 * @substream: the pcm substream
287 * @hw: the hardware parameters
289 * Sets the substream runtime hardware parameters.
291 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
292 const struct snd_pcm_hardware *hw)
294 struct snd_pcm_runtime *runtime = substream->runtime;
295 runtime->hw.info = hw->info;
296 runtime->hw.formats = hw->formats;
297 runtime->hw.period_bytes_min = hw->period_bytes_min;
298 runtime->hw.period_bytes_max = hw->period_bytes_max;
299 runtime->hw.periods_min = hw->periods_min;
300 runtime->hw.periods_max = hw->periods_max;
301 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
302 runtime->hw.fifo_size = hw->fifo_size;
305 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
307 /* DPCM stream event, send event to FE and all active BEs. */
308 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
311 struct snd_soc_dpcm *dpcm;
313 for_each_dpcm_be(fe, dir, dpcm) {
315 struct snd_soc_pcm_runtime *be = dpcm->be;
317 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
318 be->dai_link->name, event, dir);
320 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
321 (be->dpcm[dir].users >= 1))
324 snd_soc_dapm_stream_event(be, dir, event);
327 snd_soc_dapm_stream_event(fe, dir, event);
332 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
333 struct snd_pcm_hw_params *params)
336 dai->rate = params_rate(params);
337 dai->channels = params_channels(params);
338 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
342 dai->sample_bits = 0;
346 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
347 struct snd_soc_dai *soc_dai)
349 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
352 #define __soc_pcm_apply_symmetry(name, NAME) \
353 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
354 rtd->dai_link->symmetric_##name)) { \
355 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
356 #name, soc_dai->name); \
358 ret = snd_pcm_hw_constraint_single(substream->runtime, \
359 SNDRV_PCM_HW_PARAM_##NAME,\
362 dev_err(soc_dai->dev, \
363 "ASoC: Unable to apply %s constraint: %d\n",\
369 __soc_pcm_apply_symmetry(rate, RATE);
370 __soc_pcm_apply_symmetry(channels, CHANNELS);
371 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
376 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
377 struct snd_pcm_hw_params *params)
379 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
380 struct snd_soc_dai d;
381 struct snd_soc_dai *dai;
382 struct snd_soc_dai *cpu_dai;
383 unsigned int symmetry, i;
385 soc_pcm_set_dai_params(&d, params);
387 #define __soc_pcm_params_symmetry(name) \
388 symmetry = rtd->dai_link->symmetric_##name; \
389 for_each_rtd_dais(rtd, i, dai) \
390 symmetry |= dai->driver->symmetric_##name; \
393 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
394 if (cpu_dai->name && cpu_dai->name != d.name) { \
395 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %d - %d\n", \
396 #name, cpu_dai->name, d.name); \
400 /* reject unmatched parameters when applying symmetry */
401 __soc_pcm_params_symmetry(rate);
402 __soc_pcm_params_symmetry(channels);
403 __soc_pcm_params_symmetry(sample_bits);
408 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
410 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
411 struct snd_soc_dai_link *link = rtd->dai_link;
412 struct snd_soc_dai *dai;
413 unsigned int symmetry, i;
415 symmetry = link->symmetric_rate ||
416 link->symmetric_channels ||
417 link->symmetric_sample_bits;
419 for_each_rtd_dais(rtd, i, dai)
420 symmetry = symmetry ||
421 dai->driver->symmetric_rate ||
422 dai->driver->symmetric_channels ||
423 dai->driver->symmetric_sample_bits;
428 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
430 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
436 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
438 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
442 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
444 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
445 struct snd_soc_dai *cpu_dai;
446 struct snd_soc_dai *codec_dai;
447 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu;
448 int stream = substream->stream;
450 unsigned int bits = 0, cpu_bits = 0;
452 for_each_rtd_codec_dais(rtd, i, codec_dai) {
453 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
455 if (pcm_codec->sig_bits == 0) {
459 bits = max(pcm_codec->sig_bits, bits);
462 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
463 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
465 if (pcm_cpu->sig_bits == 0) {
469 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
472 soc_pcm_set_msb(substream, bits);
473 soc_pcm_set_msb(substream, cpu_bits);
477 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
478 * @rtd: ASoC PCM runtime
479 * @hw: PCM hardware parameters (output)
480 * @stream: Direction of the PCM stream
482 * Calculates the subset of stream parameters supported by all DAIs
483 * associated with the PCM stream.
485 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
486 struct snd_pcm_hardware *hw, int stream)
488 struct snd_soc_dai *codec_dai;
489 struct snd_soc_dai *cpu_dai;
490 struct snd_soc_pcm_stream *codec_stream;
491 struct snd_soc_pcm_stream *cpu_stream;
492 unsigned int chan_min = 0, chan_max = UINT_MAX;
493 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
494 unsigned int rate_min = 0, rate_max = UINT_MAX;
495 unsigned int cpu_rate_min = 0, cpu_rate_max = UINT_MAX;
496 unsigned int rates = UINT_MAX, cpu_rates = UINT_MAX;
497 u64 formats = ULLONG_MAX;
500 /* first calculate min/max only for CPUs in the DAI link */
501 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
504 * Skip CPUs which don't support the current stream type.
505 * Otherwise, since the rate, channel, and format values will
506 * zero in that case, we would have no usable settings left,
507 * causing the resulting setup to fail.
509 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
512 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
514 cpu_chan_min = max(cpu_chan_min, cpu_stream->channels_min);
515 cpu_chan_max = min(cpu_chan_max, cpu_stream->channels_max);
516 cpu_rate_min = max(cpu_rate_min, cpu_stream->rate_min);
517 cpu_rate_max = min_not_zero(cpu_rate_max, cpu_stream->rate_max);
518 formats &= cpu_stream->formats;
519 cpu_rates = snd_pcm_rate_mask_intersect(cpu_stream->rates,
523 /* second calculate min/max only for CODECs in the DAI link */
524 for_each_rtd_codec_dais(rtd, i, codec_dai) {
527 * Skip CODECs which don't support the current stream type.
528 * Otherwise, since the rate, channel, and format values will
529 * zero in that case, we would have no usable settings left,
530 * causing the resulting setup to fail.
532 if (!snd_soc_dai_stream_valid(codec_dai, stream))
535 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
537 chan_min = max(chan_min, codec_stream->channels_min);
538 chan_max = min(chan_max, codec_stream->channels_max);
539 rate_min = max(rate_min, codec_stream->rate_min);
540 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
541 formats &= codec_stream->formats;
542 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
545 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
546 if (!chan_min || !cpu_chan_min)
550 * chan min/max cannot be enforced if there are multiple CODEC DAIs
551 * connected to CPU DAI(s), use CPU DAI's directly and let
552 * channel allocation be fixed up later
554 if (rtd->num_codecs > 1) {
555 chan_min = cpu_chan_min;
556 chan_max = cpu_chan_max;
559 /* finally find a intersection between CODECs and CPUs */
560 hw->channels_min = max(chan_min, cpu_chan_min);
561 hw->channels_max = min(chan_max, cpu_chan_max);
562 hw->formats = formats;
563 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_rates);
565 snd_pcm_hw_limit_rates(hw);
567 hw->rate_min = max(hw->rate_min, cpu_rate_min);
568 hw->rate_min = max(hw->rate_min, rate_min);
569 hw->rate_max = min_not_zero(hw->rate_max, cpu_rate_max);
570 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
574 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
576 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
578 struct snd_pcm_hardware *hw = &substream->runtime->hw;
579 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
580 u64 formats = hw->formats;
583 * At least one CPU and one CODEC should match. Otherwise, we should
584 * have bailed out on a higher level, since there would be no CPU or
585 * CODEC to support the transfer direction in that case.
587 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
590 hw->formats &= formats;
593 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
595 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
596 struct snd_soc_component *component;
599 for_each_rtd_components(rtd, i, component) {
600 ret = snd_soc_component_module_get_when_open(component, substream);
604 ret = snd_soc_component_open(component, substream);
612 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
615 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
616 struct snd_soc_component *component;
619 for_each_rtd_components(rtd, i, component) {
620 r = snd_soc_component_close(component, substream, rollback);
622 ret = r; /* use last ret */
624 snd_soc_component_module_put_when_close(component, substream, rollback);
630 static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback)
632 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
633 struct snd_soc_component *component;
634 struct snd_soc_dai *dai;
637 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
640 snd_soc_runtime_deactivate(rtd, substream->stream);
642 for_each_rtd_dais(rtd, i, dai)
643 snd_soc_dai_shutdown(dai, substream, rollback);
645 snd_soc_link_shutdown(substream, rollback);
647 soc_pcm_components_close(substream, rollback);
650 mutex_unlock(&rtd->card->pcm_mutex);
652 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
654 for_each_rtd_components(rtd, i, component)
655 if (!snd_soc_component_active(component))
656 pinctrl_pm_select_sleep_state(component->dev);
662 * Called by ALSA when a PCM substream is closed. Private data can be
663 * freed here. The cpu DAI, codec DAI, machine and components are also
666 static int soc_pcm_close(struct snd_pcm_substream *substream)
668 return soc_pcm_clean(substream, 0);
672 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
673 * then initialized and any private data can be allocated. This also calls
674 * startup for the cpu DAI, component, machine and codec DAI.
676 static int soc_pcm_open(struct snd_pcm_substream *substream)
678 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
679 struct snd_pcm_runtime *runtime = substream->runtime;
680 struct snd_soc_component *component;
681 struct snd_soc_dai *dai;
682 const char *codec_dai_name = "multicodec";
683 const char *cpu_dai_name = "multicpu";
686 for_each_rtd_components(rtd, i, component)
687 pinctrl_pm_select_default_state(component->dev);
689 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
693 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
695 ret = soc_pcm_components_open(substream);
699 ret = snd_soc_link_startup(substream);
703 /* startup the audio subsystem */
704 for_each_rtd_dais(rtd, i, dai) {
705 ret = snd_soc_dai_startup(dai, substream);
709 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
715 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
716 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
719 /* Check that the codec and cpu DAIs are compatible */
720 soc_pcm_init_runtime_hw(substream);
722 if (rtd->num_codecs == 1)
723 codec_dai_name = asoc_rtd_to_codec(rtd, 0)->name;
725 if (rtd->num_cpus == 1)
726 cpu_dai_name = asoc_rtd_to_cpu(rtd, 0)->name;
728 if (soc_pcm_has_symmetry(substream))
729 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
732 if (!runtime->hw.rates) {
733 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
734 codec_dai_name, cpu_dai_name);
737 if (!runtime->hw.formats) {
738 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
739 codec_dai_name, cpu_dai_name);
742 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
743 runtime->hw.channels_min > runtime->hw.channels_max) {
744 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
745 codec_dai_name, cpu_dai_name);
749 soc_pcm_apply_msb(substream);
751 /* Symmetry only applies if we've already got an active stream. */
752 for_each_rtd_dais(rtd, i, dai) {
753 if (snd_soc_dai_active(dai)) {
754 ret = soc_pcm_apply_symmetry(substream, dai);
760 pr_debug("ASoC: %s <-> %s info:\n",
761 codec_dai_name, cpu_dai_name);
762 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
763 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
764 runtime->hw.channels_max);
765 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
766 runtime->hw.rate_max);
768 snd_soc_runtime_activate(rtd, substream->stream);
771 mutex_unlock(&rtd->card->pcm_mutex);
774 soc_pcm_clean(substream, 1);
779 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
782 * Currently nothing to do for c2c links
783 * Since c2c links are internal nodes in the DAPM graph and
784 * don't interface with the outside world or application layer
785 * we don't have to do any special handling on close.
790 * Called by ALSA when the PCM substream is prepared, can set format, sample
791 * rate, etc. This function is non atomic and can be called multiple times,
792 * it can refer to the runtime info.
794 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
796 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
797 struct snd_soc_dai *dai;
800 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
802 ret = snd_soc_link_prepare(substream);
806 ret = snd_soc_pcm_component_prepare(substream);
810 ret = snd_soc_pcm_dai_prepare(substream);
812 dev_err(rtd->dev, "ASoC: DAI prepare error: %d\n", ret);
816 /* cancel any delayed stream shutdown that is pending */
817 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
820 cancel_delayed_work(&rtd->delayed_work);
823 snd_soc_dapm_stream_event(rtd, substream->stream,
824 SND_SOC_DAPM_STREAM_START);
826 for_each_rtd_dais(rtd, i, dai)
827 snd_soc_dai_digital_mute(dai, 0, substream->stream);
830 mutex_unlock(&rtd->card->pcm_mutex);
834 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
837 struct snd_interval *interval;
838 int channels = hweight_long(mask);
840 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
841 interval->min = channels;
842 interval->max = channels;
845 static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback)
847 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
848 struct snd_soc_dai *dai;
851 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
853 /* clear the corresponding DAIs parameters when going to be inactive */
854 for_each_rtd_dais(rtd, i, dai) {
855 int active = snd_soc_dai_stream_active(dai, substream->stream);
857 if (snd_soc_dai_active(dai) == 1)
858 soc_pcm_set_dai_params(dai, NULL);
861 snd_soc_dai_digital_mute(dai, 1, substream->stream);
864 /* run the stream event */
865 snd_soc_dapm_stream_stop(rtd, substream->stream);
867 /* free any machine hw params */
868 snd_soc_link_hw_free(substream, rollback);
870 /* free any component resources */
871 snd_soc_pcm_component_hw_free(substream, rollback);
873 /* now free hw params for the DAIs */
874 for_each_rtd_dais(rtd, i, dai) {
875 if (!snd_soc_dai_stream_valid(dai, substream->stream))
878 snd_soc_dai_hw_free(dai, substream, rollback);
881 mutex_unlock(&rtd->card->pcm_mutex);
886 * Frees resources allocated by hw_params, can be called multiple times
888 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
890 return soc_pcm_hw_clean(substream, 0);
894 * Called by ALSA when the hardware params are set by application. This
895 * function can also be called multiple times and can allocate buffers
896 * (using snd_pcm_lib_* ). It's non-atomic.
898 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
899 struct snd_pcm_hw_params *params)
901 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
902 struct snd_soc_dai *cpu_dai;
903 struct snd_soc_dai *codec_dai;
906 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
908 ret = soc_pcm_params_symmetry(substream, params);
912 ret = snd_soc_link_hw_params(substream, params);
916 for_each_rtd_codec_dais(rtd, i, codec_dai) {
917 struct snd_pcm_hw_params codec_params;
920 * Skip CODECs which don't support the current stream type,
921 * the idea being that if a CODEC is not used for the currently
922 * set up transfer direction, it should not need to be
923 * configured, especially since the configuration used might
924 * not even be supported by that CODEC. There may be cases
925 * however where a CODEC needs to be set up although it is
926 * actually not being used for the transfer, e.g. if a
927 * capture-only CODEC is acting as an LRCLK and/or BCLK master
928 * for the DAI link including a playback-only CODEC.
929 * If this becomes necessary, we will have to augment the
930 * machine driver setup with information on how to act, so
931 * we can do the right thing here.
933 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
936 /* copy params for each codec */
937 codec_params = *params;
939 /* fixup params based on TDM slot masks */
940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
942 soc_pcm_codec_params_fixup(&codec_params,
945 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
947 soc_pcm_codec_params_fixup(&codec_params,
950 ret = snd_soc_dai_hw_params(codec_dai, substream,
955 soc_pcm_set_dai_params(codec_dai, &codec_params);
956 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
959 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
961 * Skip CPUs which don't support the current stream
962 * type. See soc_pcm_init_runtime_hw() for more details
964 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
967 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
971 /* store the parameters for each DAI */
972 soc_pcm_set_dai_params(cpu_dai, params);
973 snd_soc_dapm_update_dai(substream, params, cpu_dai);
976 ret = snd_soc_pcm_component_hw_params(substream, params);
978 mutex_unlock(&rtd->card->pcm_mutex);
981 soc_pcm_hw_clean(substream, 1);
986 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
988 int ret = -EINVAL, _ret = 0;
992 case SNDRV_PCM_TRIGGER_START:
993 case SNDRV_PCM_TRIGGER_RESUME:
994 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
995 ret = snd_soc_link_trigger(substream, cmd, 0);
999 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1003 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1012 case SNDRV_PCM_TRIGGER_START:
1013 cmd = SNDRV_PCM_TRIGGER_STOP;
1015 case SNDRV_PCM_TRIGGER_RESUME:
1016 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1018 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1019 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1025 case SNDRV_PCM_TRIGGER_STOP:
1026 case SNDRV_PCM_TRIGGER_SUSPEND:
1027 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1028 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1032 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1036 ret = snd_soc_link_trigger(substream, cmd, rollback);
1047 * soc level wrapper for pointer callback
1048 * If cpu_dai, codec_dai, component driver has the delay callback, then
1049 * the runtime->delay will be updated accordingly.
1051 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1053 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1054 struct snd_soc_dai *cpu_dai;
1055 struct snd_soc_dai *codec_dai;
1056 struct snd_pcm_runtime *runtime = substream->runtime;
1057 snd_pcm_uframes_t offset = 0;
1058 snd_pcm_sframes_t delay = 0;
1059 snd_pcm_sframes_t codec_delay = 0;
1060 snd_pcm_sframes_t cpu_delay = 0;
1063 /* clearing the previous total delay */
1066 offset = snd_soc_pcm_component_pointer(substream);
1068 /* base delay if assigned in pointer callback */
1069 delay = runtime->delay;
1071 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1072 cpu_delay = max(cpu_delay,
1073 snd_soc_dai_delay(cpu_dai, substream));
1077 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1078 codec_delay = max(codec_delay,
1079 snd_soc_dai_delay(codec_dai, substream));
1081 delay += codec_delay;
1083 runtime->delay = delay;
1088 /* connect a FE and BE */
1089 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1090 struct snd_soc_pcm_runtime *be, int stream)
1092 struct snd_soc_dpcm *dpcm;
1093 unsigned long flags;
1095 /* only add new dpcms */
1096 for_each_dpcm_be(fe, stream, dpcm) {
1097 if (dpcm->be == be && dpcm->fe == fe)
1101 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1107 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1108 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1109 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1110 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1111 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1112 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1114 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1115 stream ? "capture" : "playback", fe->dai_link->name,
1116 stream ? "<-" : "->", be->dai_link->name);
1118 dpcm_create_debugfs_state(dpcm, stream);
1123 /* reparent a BE onto another FE */
1124 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1125 struct snd_soc_pcm_runtime *be, int stream)
1127 struct snd_soc_dpcm *dpcm;
1128 struct snd_pcm_substream *fe_substream, *be_substream;
1130 /* reparent if BE is connected to other FEs */
1131 if (!be->dpcm[stream].users)
1134 be_substream = snd_soc_dpcm_get_substream(be, stream);
1136 for_each_dpcm_fe(be, stream, dpcm) {
1140 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1141 stream ? "capture" : "playback",
1142 dpcm->fe->dai_link->name,
1143 stream ? "<-" : "->", dpcm->be->dai_link->name);
1145 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1146 be_substream->runtime = fe_substream->runtime;
1151 /* disconnect a BE and FE */
1152 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1154 struct snd_soc_dpcm *dpcm, *d;
1155 unsigned long flags;
1157 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1158 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1159 stream ? "capture" : "playback",
1160 dpcm->be->dai_link->name);
1162 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1165 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1166 stream ? "capture" : "playback", fe->dai_link->name,
1167 stream ? "<-" : "->", dpcm->be->dai_link->name);
1169 /* BEs still alive need new FE */
1170 dpcm_be_reparent(fe, dpcm->be, stream);
1172 dpcm_remove_debugfs_state(dpcm);
1174 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1175 list_del(&dpcm->list_be);
1176 list_del(&dpcm->list_fe);
1177 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1182 /* get BE for DAI widget and stream */
1183 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1184 struct snd_soc_dapm_widget *widget, int stream)
1186 struct snd_soc_pcm_runtime *be;
1187 struct snd_soc_dapm_widget *w;
1188 struct snd_soc_dai *dai;
1191 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1193 for_each_card_rtds(card, be) {
1195 if (!be->dai_link->no_pcm)
1198 for_each_rtd_dais(be, i, dai) {
1199 w = snd_soc_dai_get_widget(dai, stream);
1201 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1202 w ? w->name : "(not set)");
1209 /* Widget provided is not a BE */
1213 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1214 struct snd_soc_dapm_widget *widget)
1216 struct snd_soc_dapm_widget *w;
1219 for_each_dapm_widgets(list, i, w)
1226 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1227 enum snd_soc_dapm_direction dir)
1229 struct snd_soc_card *card = widget->dapm->card;
1230 struct snd_soc_pcm_runtime *rtd;
1233 /* adjust dir to stream */
1234 if (dir == SND_SOC_DAPM_DIR_OUT)
1235 stream = SNDRV_PCM_STREAM_PLAYBACK;
1237 stream = SNDRV_PCM_STREAM_CAPTURE;
1239 rtd = dpcm_get_be(card, widget, stream);
1246 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1247 int stream, struct snd_soc_dapm_widget_list **list)
1249 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1252 if (fe->num_cpus > 1) {
1254 "%s doesn't support Multi CPU yet\n", __func__);
1258 /* get number of valid DAI paths and their widgets */
1259 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1260 fe->card->component_chaining ?
1261 NULL : dpcm_end_walk_at_be);
1263 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1264 stream ? "capture" : "playback");
1269 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1271 snd_soc_dapm_dai_free_widgets(list);
1274 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1275 struct snd_soc_dapm_widget_list *list)
1277 struct snd_soc_dapm_widget *widget;
1278 struct snd_soc_dai *dai;
1281 /* is there a valid DAI widget for this BE */
1282 for_each_rtd_dais(dpcm->be, i, dai) {
1283 widget = snd_soc_dai_get_widget(dai, stream);
1286 * The BE is pruned only if none of the dai
1287 * widgets are in the active list.
1289 if (widget && widget_in_list(list, widget))
1296 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1297 struct snd_soc_dapm_widget_list **list_)
1299 struct snd_soc_dpcm *dpcm;
1302 /* Destroy any old FE <--> BE connections */
1303 for_each_dpcm_be(fe, stream, dpcm) {
1304 if (dpcm_be_is_active(dpcm, stream, *list_))
1307 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1308 stream ? "capture" : "playback",
1309 dpcm->be->dai_link->name, fe->dai_link->name);
1310 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1311 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1315 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1319 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1320 struct snd_soc_dapm_widget_list **list_)
1322 struct snd_soc_card *card = fe->card;
1323 struct snd_soc_dapm_widget_list *list = *list_;
1324 struct snd_soc_pcm_runtime *be;
1325 struct snd_soc_dapm_widget *widget;
1326 int i, new = 0, err;
1328 /* Create any new FE <--> BE connections */
1329 for_each_dapm_widgets(list, i, widget) {
1331 switch (widget->id) {
1332 case snd_soc_dapm_dai_in:
1333 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1336 case snd_soc_dapm_dai_out:
1337 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1344 /* is there a valid BE rtd for this widget */
1345 be = dpcm_get_be(card, widget, stream);
1347 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1352 /* don't connect if FE is not running */
1353 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1356 /* newly connected FE and BE */
1357 err = dpcm_be_connect(fe, be, stream);
1359 dev_err(fe->dev, "ASoC: can't connect %s\n",
1362 } else if (err == 0) /* already connected */
1366 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1370 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1375 * Find the corresponding BE DAIs that source or sink audio to this
1378 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1379 int stream, struct snd_soc_dapm_widget_list **list, int new)
1382 return dpcm_add_paths(fe, stream, list);
1384 return dpcm_prune_paths(fe, stream, list);
1387 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1389 struct snd_soc_dpcm *dpcm;
1390 unsigned long flags;
1392 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1393 for_each_dpcm_be(fe, stream, dpcm)
1394 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1395 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1398 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1401 struct snd_soc_dpcm *dpcm;
1403 /* disable any enabled and non active backends */
1404 for_each_dpcm_be(fe, stream, dpcm) {
1406 struct snd_soc_pcm_runtime *be = dpcm->be;
1407 struct snd_pcm_substream *be_substream =
1408 snd_soc_dpcm_get_substream(be, stream);
1410 if (be->dpcm[stream].users == 0)
1411 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1412 stream ? "capture" : "playback",
1413 be->dpcm[stream].state);
1415 if (--be->dpcm[stream].users != 0)
1418 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1421 soc_pcm_close(be_substream);
1422 be_substream->runtime = NULL;
1423 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1427 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1429 struct snd_soc_dpcm *dpcm;
1432 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1433 for_each_dpcm_be(fe, stream, dpcm) {
1435 struct snd_soc_pcm_runtime *be = dpcm->be;
1436 struct snd_pcm_substream *be_substream =
1437 snd_soc_dpcm_get_substream(be, stream);
1439 if (!be_substream) {
1440 dev_err(be->dev, "ASoC: no backend %s stream\n",
1441 stream ? "capture" : "playback");
1445 /* is this op for this BE ? */
1446 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1449 /* first time the dpcm is open ? */
1450 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1451 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1452 stream ? "capture" : "playback",
1453 be->dpcm[stream].state);
1455 if (be->dpcm[stream].users++ != 0)
1458 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1459 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1462 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1463 stream ? "capture" : "playback", be->dai_link->name);
1465 be_substream->runtime = be->dpcm[stream].runtime;
1466 err = soc_pcm_open(be_substream);
1468 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1469 be->dpcm[stream].users--;
1470 if (be->dpcm[stream].users < 0)
1471 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1472 stream ? "capture" : "playback",
1473 be->dpcm[stream].state);
1475 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1486 /* disable any enabled and non active backends */
1487 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1488 struct snd_soc_pcm_runtime *be = dpcm->be;
1489 struct snd_pcm_substream *be_substream =
1490 snd_soc_dpcm_get_substream(be, stream);
1492 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1495 if (be->dpcm[stream].users == 0)
1496 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1497 stream ? "capture" : "playback",
1498 be->dpcm[stream].state);
1500 if (--be->dpcm[stream].users != 0)
1503 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1506 soc_pcm_close(be_substream);
1507 be_substream->runtime = NULL;
1508 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1514 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1515 struct snd_soc_pcm_stream *stream)
1517 runtime->hw.rate_min = stream->rate_min;
1518 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1519 runtime->hw.channels_min = stream->channels_min;
1520 runtime->hw.channels_max = stream->channels_max;
1521 if (runtime->hw.formats)
1522 runtime->hw.formats &= stream->formats;
1524 runtime->hw.formats = stream->formats;
1525 runtime->hw.rates = stream->rates;
1528 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1531 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1532 struct snd_soc_dpcm *dpcm;
1533 struct snd_soc_dai *dai;
1534 int stream = substream->stream;
1536 if (!fe->dai_link->dpcm_merged_format)
1540 * It returns merged BE codec format
1541 * if FE want to use it (= dpcm_merged_format)
1544 for_each_dpcm_be(fe, stream, dpcm) {
1545 struct snd_soc_pcm_runtime *be = dpcm->be;
1546 struct snd_soc_pcm_stream *codec_stream;
1549 for_each_rtd_codec_dais(be, i, dai) {
1551 * Skip CODECs which don't support the current stream
1552 * type. See soc_pcm_init_runtime_hw() for more details
1554 if (!snd_soc_dai_stream_valid(dai, stream))
1557 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1559 *formats &= codec_stream->formats;
1564 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1565 unsigned int *channels_min,
1566 unsigned int *channels_max)
1568 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1569 struct snd_soc_dpcm *dpcm;
1570 int stream = substream->stream;
1572 if (!fe->dai_link->dpcm_merged_chan)
1576 * It returns merged BE codec channel;
1577 * if FE want to use it (= dpcm_merged_chan)
1580 for_each_dpcm_be(fe, stream, dpcm) {
1581 struct snd_soc_pcm_runtime *be = dpcm->be;
1582 struct snd_soc_pcm_stream *codec_stream;
1583 struct snd_soc_pcm_stream *cpu_stream;
1584 struct snd_soc_dai *dai;
1587 for_each_rtd_cpu_dais(be, i, dai) {
1589 * Skip CPUs which don't support the current stream
1590 * type. See soc_pcm_init_runtime_hw() for more details
1592 if (!snd_soc_dai_stream_valid(dai, stream))
1595 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1597 *channels_min = max(*channels_min,
1598 cpu_stream->channels_min);
1599 *channels_max = min(*channels_max,
1600 cpu_stream->channels_max);
1604 * chan min/max cannot be enforced if there are multiple CODEC
1605 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1607 if (be->num_codecs == 1) {
1608 codec_stream = snd_soc_dai_get_pcm_stream(asoc_rtd_to_codec(be, 0), stream);
1610 *channels_min = max(*channels_min,
1611 codec_stream->channels_min);
1612 *channels_max = min(*channels_max,
1613 codec_stream->channels_max);
1618 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1619 unsigned int *rates,
1620 unsigned int *rate_min,
1621 unsigned int *rate_max)
1623 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1624 struct snd_soc_dpcm *dpcm;
1625 int stream = substream->stream;
1627 if (!fe->dai_link->dpcm_merged_rate)
1631 * It returns merged BE codec channel;
1632 * if FE want to use it (= dpcm_merged_chan)
1635 for_each_dpcm_be(fe, stream, dpcm) {
1636 struct snd_soc_pcm_runtime *be = dpcm->be;
1637 struct snd_soc_pcm_stream *pcm;
1638 struct snd_soc_dai *dai;
1641 for_each_rtd_dais(be, i, dai) {
1643 * Skip DAIs which don't support the current stream
1644 * type. See soc_pcm_init_runtime_hw() for more details
1646 if (!snd_soc_dai_stream_valid(dai, stream))
1649 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1651 *rate_min = max(*rate_min, pcm->rate_min);
1652 *rate_max = min_not_zero(*rate_max, pcm->rate_max);
1653 *rates = snd_pcm_rate_mask_intersect(*rates, pcm->rates);
1658 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1660 struct snd_pcm_runtime *runtime = substream->runtime;
1661 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1662 struct snd_soc_dai *cpu_dai;
1665 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1667 * Skip CPUs which don't support the current stream
1668 * type. See soc_pcm_init_runtime_hw() for more details
1670 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1673 dpcm_init_runtime_hw(runtime,
1674 snd_soc_dai_get_pcm_stream(cpu_dai,
1675 substream->stream));
1678 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1679 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1680 &runtime->hw.channels_max);
1681 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1682 &runtime->hw.rate_min, &runtime->hw.rate_max);
1685 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1688 struct snd_soc_dpcm *dpcm;
1689 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1690 struct snd_soc_dai *fe_cpu_dai;
1694 /* apply symmetry for FE */
1695 if (soc_pcm_has_symmetry(fe_substream))
1696 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1698 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1699 /* Symmetry only applies if we've got an active stream. */
1700 if (snd_soc_dai_active(fe_cpu_dai)) {
1701 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1707 /* apply symmetry for BE */
1708 for_each_dpcm_be(fe, stream, dpcm) {
1709 struct snd_soc_pcm_runtime *be = dpcm->be;
1710 struct snd_pcm_substream *be_substream =
1711 snd_soc_dpcm_get_substream(be, stream);
1712 struct snd_soc_pcm_runtime *rtd;
1713 struct snd_soc_dai *dai;
1716 /* A backend may not have the requested substream */
1720 rtd = asoc_substream_to_rtd(be_substream);
1721 if (rtd->dai_link->be_hw_params_fixup)
1724 if (soc_pcm_has_symmetry(be_substream))
1725 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1727 /* Symmetry only applies if we've got an active stream. */
1728 for_each_rtd_dais(rtd, i, dai) {
1729 if (snd_soc_dai_active(dai)) {
1730 err = soc_pcm_apply_symmetry(fe_substream, dai);
1740 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1742 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1743 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1744 int stream = fe_substream->stream, ret = 0;
1746 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1748 ret = dpcm_be_dai_startup(fe, stream);
1750 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1754 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1756 /* start the DAI frontend */
1757 ret = soc_pcm_open(fe_substream);
1759 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1763 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1765 dpcm_set_fe_runtime(fe_substream);
1766 snd_pcm_limit_hw_rates(runtime);
1768 ret = dpcm_apply_symmetry(fe_substream, stream);
1770 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1775 dpcm_be_dai_startup_unwind(fe, stream);
1777 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1781 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1783 struct snd_soc_dpcm *dpcm;
1785 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1786 for_each_dpcm_be(fe, stream, dpcm) {
1788 struct snd_soc_pcm_runtime *be = dpcm->be;
1789 struct snd_pcm_substream *be_substream =
1790 snd_soc_dpcm_get_substream(be, stream);
1792 /* is this op for this BE ? */
1793 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1796 if (be->dpcm[stream].users == 0)
1797 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1798 stream ? "capture" : "playback",
1799 be->dpcm[stream].state);
1801 if (--be->dpcm[stream].users != 0)
1804 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1805 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1806 soc_pcm_hw_free(be_substream);
1807 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1810 dev_dbg(be->dev, "ASoC: close BE %s\n",
1811 be->dai_link->name);
1813 soc_pcm_close(be_substream);
1814 be_substream->runtime = NULL;
1816 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1821 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1823 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1824 int stream = substream->stream;
1826 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1828 /* shutdown the BEs */
1829 dpcm_be_dai_shutdown(fe, stream);
1831 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1833 /* now shutdown the frontend */
1834 soc_pcm_close(substream);
1836 /* run the stream stop event */
1837 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1839 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1840 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1844 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1846 struct snd_soc_dpcm *dpcm;
1848 /* only hw_params backends that are either sinks or sources
1849 * to this frontend DAI */
1850 for_each_dpcm_be(fe, stream, dpcm) {
1852 struct snd_soc_pcm_runtime *be = dpcm->be;
1853 struct snd_pcm_substream *be_substream =
1854 snd_soc_dpcm_get_substream(be, stream);
1856 /* is this op for this BE ? */
1857 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1860 /* only free hw when no longer used - check all FEs */
1861 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1864 /* do not free hw if this BE is used by other FE */
1865 if (be->dpcm[stream].users > 1)
1868 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1869 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1870 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1871 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1872 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1873 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1876 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1877 be->dai_link->name);
1879 soc_pcm_hw_free(be_substream);
1881 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1887 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1889 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1890 int err, stream = substream->stream;
1892 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1893 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1895 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1897 /* call hw_free on the frontend */
1898 err = soc_pcm_hw_free(substream);
1900 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1901 fe->dai_link->name);
1903 /* only hw_params backends that are either sinks or sources
1904 * to this frontend DAI */
1905 err = dpcm_be_dai_hw_free(fe, stream);
1907 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1908 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1910 mutex_unlock(&fe->card->mutex);
1914 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1916 struct snd_soc_dpcm *dpcm;
1919 for_each_dpcm_be(fe, stream, dpcm) {
1921 struct snd_soc_pcm_runtime *be = dpcm->be;
1922 struct snd_pcm_substream *be_substream =
1923 snd_soc_dpcm_get_substream(be, stream);
1925 /* is this op for this BE ? */
1926 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1929 /* copy params for each dpcm */
1930 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1931 sizeof(struct snd_pcm_hw_params));
1933 /* perform any hw_params fixups */
1934 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
1938 /* copy the fixed-up hw params for BE dai */
1939 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
1940 sizeof(struct snd_pcm_hw_params));
1942 /* only allow hw_params() if no connected FEs are running */
1943 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1946 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1947 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1948 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1951 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1952 be->dai_link->name);
1954 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1956 dev_err(dpcm->be->dev,
1957 "ASoC: hw_params BE failed %d\n", ret);
1961 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1966 /* disable any enabled and non active backends */
1967 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1968 struct snd_soc_pcm_runtime *be = dpcm->be;
1969 struct snd_pcm_substream *be_substream =
1970 snd_soc_dpcm_get_substream(be, stream);
1972 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1975 /* only allow hw_free() if no connected FEs are running */
1976 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1979 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1980 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1981 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1982 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1985 soc_pcm_hw_free(be_substream);
1991 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1992 struct snd_pcm_hw_params *params)
1994 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1995 int ret, stream = substream->stream;
1997 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1998 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2000 memcpy(&fe->dpcm[stream].hw_params, params,
2001 sizeof(struct snd_pcm_hw_params));
2002 ret = dpcm_be_dai_hw_params(fe, stream);
2004 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2008 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2009 fe->dai_link->name, params_rate(params),
2010 params_channels(params), params_format(params));
2012 /* call hw_params on the frontend */
2013 ret = soc_pcm_hw_params(substream, params);
2015 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2016 dpcm_be_dai_hw_free(fe, stream);
2018 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2021 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2022 mutex_unlock(&fe->card->mutex);
2026 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2029 struct snd_soc_dpcm *dpcm;
2032 for_each_dpcm_be(fe, stream, dpcm) {
2034 struct snd_soc_pcm_runtime *be = dpcm->be;
2035 struct snd_pcm_substream *be_substream =
2036 snd_soc_dpcm_get_substream(be, stream);
2038 /* is this op for this BE ? */
2039 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2042 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2043 be->dai_link->name, cmd);
2046 case SNDRV_PCM_TRIGGER_START:
2047 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2048 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2049 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2052 ret = soc_pcm_trigger(be_substream, cmd);
2056 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2058 case SNDRV_PCM_TRIGGER_RESUME:
2059 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2062 ret = soc_pcm_trigger(be_substream, cmd);
2066 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2068 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2069 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2072 ret = soc_pcm_trigger(be_substream, cmd);
2076 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2078 case SNDRV_PCM_TRIGGER_STOP:
2079 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2080 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2083 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2086 ret = soc_pcm_trigger(be_substream, cmd);
2090 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2092 case SNDRV_PCM_TRIGGER_SUSPEND:
2093 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2096 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2099 ret = soc_pcm_trigger(be_substream, cmd);
2103 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2105 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2106 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2109 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2112 ret = soc_pcm_trigger(be_substream, cmd);
2116 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2123 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2125 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2126 int cmd, bool fe_first)
2128 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2131 /* call trigger on the frontend before the backend. */
2133 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2134 fe->dai_link->name, cmd);
2136 ret = soc_pcm_trigger(substream, cmd);
2140 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2144 /* call trigger on the frontend after the backend. */
2145 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2149 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2150 fe->dai_link->name, cmd);
2152 ret = soc_pcm_trigger(substream, cmd);
2157 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2159 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2160 int stream = substream->stream;
2162 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2164 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2167 case SND_SOC_DPCM_TRIGGER_PRE:
2169 case SNDRV_PCM_TRIGGER_START:
2170 case SNDRV_PCM_TRIGGER_RESUME:
2171 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2172 case SNDRV_PCM_TRIGGER_DRAIN:
2173 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2175 case SNDRV_PCM_TRIGGER_STOP:
2176 case SNDRV_PCM_TRIGGER_SUSPEND:
2177 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2178 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2185 case SND_SOC_DPCM_TRIGGER_POST:
2187 case SNDRV_PCM_TRIGGER_START:
2188 case SNDRV_PCM_TRIGGER_RESUME:
2189 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2190 case SNDRV_PCM_TRIGGER_DRAIN:
2191 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2193 case SNDRV_PCM_TRIGGER_STOP:
2194 case SNDRV_PCM_TRIGGER_SUSPEND:
2195 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2196 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2203 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2204 /* bespoke trigger() - handles both FE and BEs */
2206 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2207 fe->dai_link->name, cmd);
2209 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2212 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2213 fe->dai_link->name);
2219 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2225 case SNDRV_PCM_TRIGGER_START:
2226 case SNDRV_PCM_TRIGGER_RESUME:
2227 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2228 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2230 case SNDRV_PCM_TRIGGER_STOP:
2231 case SNDRV_PCM_TRIGGER_SUSPEND:
2232 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2234 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2235 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2240 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2244 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2246 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2247 int stream = substream->stream;
2249 /* if FE's runtime_update is already set, we're in race;
2250 * process this trigger later at exit
2252 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2253 fe->dpcm[stream].trigger_pending = cmd + 1;
2254 return 0; /* delayed, assuming it's successful */
2257 /* we're alone, let's trigger */
2258 return dpcm_fe_dai_do_trigger(substream, cmd);
2261 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2263 struct snd_soc_dpcm *dpcm;
2266 for_each_dpcm_be(fe, stream, dpcm) {
2268 struct snd_soc_pcm_runtime *be = dpcm->be;
2269 struct snd_pcm_substream *be_substream =
2270 snd_soc_dpcm_get_substream(be, stream);
2272 /* is this op for this BE ? */
2273 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2276 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2277 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2278 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2279 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2282 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2283 be->dai_link->name);
2285 ret = soc_pcm_prepare(be_substream);
2287 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2292 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2297 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2299 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2300 int stream = substream->stream, ret = 0;
2302 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2304 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2306 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2308 /* there is no point preparing this FE if there are no BEs */
2309 if (list_empty(&fe->dpcm[stream].be_clients)) {
2310 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2311 fe->dai_link->name);
2316 ret = dpcm_be_dai_prepare(fe, stream);
2320 /* call prepare on the frontend */
2321 ret = soc_pcm_prepare(substream);
2323 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2324 fe->dai_link->name);
2328 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2331 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2332 mutex_unlock(&fe->card->mutex);
2337 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2339 struct snd_pcm_substream *substream =
2340 snd_soc_dpcm_get_substream(fe, stream);
2341 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2344 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2345 stream ? "capture" : "playback", fe->dai_link->name);
2347 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2348 /* call bespoke trigger - FE takes care of all BE triggers */
2349 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2350 fe->dai_link->name);
2352 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2354 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2356 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2357 fe->dai_link->name);
2359 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2361 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2364 err = dpcm_be_dai_hw_free(fe, stream);
2366 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2368 err = dpcm_be_dai_shutdown(fe, stream);
2370 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2372 /* run the stream event for each BE */
2373 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2378 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2380 struct snd_pcm_substream *substream =
2381 snd_soc_dpcm_get_substream(fe, stream);
2382 struct snd_soc_dpcm *dpcm;
2383 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2385 unsigned long flags;
2387 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2388 stream ? "capture" : "playback", fe->dai_link->name);
2390 /* Only start the BE if the FE is ready */
2391 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2392 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2394 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2395 fe->dai_link->name, fe->dpcm[stream].state);
2400 /* startup must always be called for new BEs */
2401 ret = dpcm_be_dai_startup(fe, stream);
2405 /* keep going if FE state is > open */
2406 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2409 ret = dpcm_be_dai_hw_params(fe, stream);
2413 /* keep going if FE state is > hw_params */
2414 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2418 ret = dpcm_be_dai_prepare(fe, stream);
2422 /* run the stream event for each BE */
2423 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2425 /* keep going if FE state is > prepare */
2426 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2427 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2430 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2431 /* call trigger on the frontend - FE takes care of all BE triggers */
2432 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2433 fe->dai_link->name);
2435 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2437 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2441 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2442 fe->dai_link->name);
2444 ret = dpcm_be_dai_trigger(fe, stream,
2445 SNDRV_PCM_TRIGGER_START);
2447 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2455 dpcm_be_dai_hw_free(fe, stream);
2457 dpcm_be_dai_shutdown(fe, stream);
2459 /* disconnect any pending BEs */
2460 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2461 for_each_dpcm_be(fe, stream, dpcm) {
2462 struct snd_soc_pcm_runtime *be = dpcm->be;
2464 /* is this op for this BE ? */
2465 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2468 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2469 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2470 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2472 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2477 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2479 struct snd_soc_dapm_widget_list *list;
2484 if (!fe->dai_link->dynamic)
2487 if (fe->num_cpus > 1) {
2489 "%s doesn't support Multi CPU yet\n", __func__);
2493 /* only check active links */
2494 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2497 /* DAPM sync will call this to update DSP paths */
2498 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2499 new ? "new" : "old", fe->dai_link->name);
2501 for_each_pcm_streams(stream) {
2503 /* skip if FE doesn't have playback/capture capability */
2504 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2505 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2508 /* skip if FE isn't currently playing/capturing */
2509 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2510 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2513 paths = dpcm_path_get(fe, stream, &list);
2515 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2517 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2518 "playback" : "capture");
2522 /* update any playback/capture paths */
2523 count = dpcm_process_paths(fe, stream, &list, new);
2525 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2527 ret = dpcm_run_update_startup(fe, stream);
2529 ret = dpcm_run_update_shutdown(fe, stream);
2531 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2532 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2534 dpcm_clear_pending_state(fe, stream);
2535 dpcm_be_disconnect(fe, stream);
2538 dpcm_path_put(&list);
2544 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2547 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2549 struct snd_soc_pcm_runtime *fe;
2552 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2553 /* shutdown all old paths first */
2554 for_each_card_rtds(card, fe) {
2555 ret = soc_dpcm_fe_runtime_update(fe, 0);
2560 /* bring new paths up */
2561 for_each_card_rtds(card, fe) {
2562 ret = soc_dpcm_fe_runtime_update(fe, 1);
2568 mutex_unlock(&card->mutex);
2571 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2573 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2575 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2576 struct snd_soc_dpcm *dpcm;
2577 int stream = fe_substream->stream;
2579 /* mark FE's links ready to prune */
2580 for_each_dpcm_be(fe, stream, dpcm)
2581 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2583 dpcm_be_disconnect(fe, stream);
2585 fe->dpcm[stream].runtime = NULL;
2588 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2590 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2593 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2594 ret = dpcm_fe_dai_shutdown(fe_substream);
2596 dpcm_fe_dai_cleanup(fe_substream);
2598 mutex_unlock(&fe->card->mutex);
2602 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2604 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2605 struct snd_soc_dapm_widget_list *list;
2607 int stream = fe_substream->stream;
2609 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2610 fe->dpcm[stream].runtime = fe_substream->runtime;
2612 ret = dpcm_path_get(fe, stream, &list);
2615 } else if (ret == 0) {
2616 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2617 fe->dai_link->name, stream ? "capture" : "playback");
2620 /* calculate valid and active FE <-> BE dpcms */
2621 dpcm_process_paths(fe, stream, &list, 1);
2623 ret = dpcm_fe_dai_startup(fe_substream);
2625 dpcm_fe_dai_cleanup(fe_substream);
2627 dpcm_clear_pending_state(fe, stream);
2628 dpcm_path_put(&list);
2630 mutex_unlock(&fe->card->mutex);
2634 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2635 int *playback, int *capture)
2637 struct snd_soc_dai *codec_dai;
2638 struct snd_soc_dai *cpu_dai;
2642 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) {
2644 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2648 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2649 if (rtd->dai_link->dpcm_playback) {
2650 stream = SNDRV_PCM_STREAM_PLAYBACK;
2652 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2653 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2659 dev_err(rtd->card->dev,
2660 "No CPU DAIs support playback for stream %s\n",
2661 rtd->dai_link->stream_name);
2665 if (rtd->dai_link->dpcm_capture) {
2666 stream = SNDRV_PCM_STREAM_CAPTURE;
2668 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2669 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2676 dev_err(rtd->card->dev,
2677 "No CPU DAIs support capture for stream %s\n",
2678 rtd->dai_link->stream_name);
2683 /* Adapt stream for codec2codec links */
2684 int cpu_capture = rtd->dai_link->params ?
2685 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2686 int cpu_playback = rtd->dai_link->params ?
2687 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2689 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2690 if (rtd->num_cpus == 1) {
2691 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2692 } else if (rtd->num_cpus == rtd->num_codecs) {
2693 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2695 dev_err(rtd->card->dev,
2696 "N cpus to M codecs link is not supported yet\n");
2700 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2701 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2703 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2704 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2709 if (rtd->dai_link->playback_only) {
2714 if (rtd->dai_link->capture_only) {
2722 static int soc_create_pcm(struct snd_pcm **pcm,
2723 struct snd_soc_pcm_runtime *rtd,
2724 int playback, int capture, int num)
2729 /* create the PCM */
2730 if (rtd->dai_link->params) {
2731 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2732 rtd->dai_link->stream_name);
2734 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2735 playback, capture, pcm);
2736 } else if (rtd->dai_link->no_pcm) {
2737 snprintf(new_name, sizeof(new_name), "(%s)",
2738 rtd->dai_link->stream_name);
2740 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2741 playback, capture, pcm);
2743 if (rtd->dai_link->dynamic)
2744 snprintf(new_name, sizeof(new_name), "%s (*)",
2745 rtd->dai_link->stream_name);
2747 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2748 rtd->dai_link->stream_name,
2749 (rtd->num_codecs > 1) ?
2750 "multicodec" : asoc_rtd_to_codec(rtd, 0)->name, num);
2752 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2756 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2757 new_name, rtd->dai_link->name, ret);
2760 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2765 /* create a new pcm */
2766 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2768 struct snd_soc_component *component;
2769 struct snd_pcm *pcm;
2770 int ret = 0, playback = 0, capture = 0;
2773 ret = soc_get_playback_capture(rtd, &playback, &capture);
2777 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2781 /* DAPM dai link stream work */
2782 if (rtd->dai_link->params)
2783 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2785 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2788 pcm->nonatomic = rtd->dai_link->nonatomic;
2789 pcm->private_data = rtd;
2791 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2793 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2795 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2799 /* ASoC PCM operations */
2800 if (rtd->dai_link->dynamic) {
2801 rtd->ops.open = dpcm_fe_dai_open;
2802 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2803 rtd->ops.prepare = dpcm_fe_dai_prepare;
2804 rtd->ops.trigger = dpcm_fe_dai_trigger;
2805 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2806 rtd->ops.close = dpcm_fe_dai_close;
2807 rtd->ops.pointer = soc_pcm_pointer;
2809 rtd->ops.open = soc_pcm_open;
2810 rtd->ops.hw_params = soc_pcm_hw_params;
2811 rtd->ops.prepare = soc_pcm_prepare;
2812 rtd->ops.trigger = soc_pcm_trigger;
2813 rtd->ops.hw_free = soc_pcm_hw_free;
2814 rtd->ops.close = soc_pcm_close;
2815 rtd->ops.pointer = soc_pcm_pointer;
2818 for_each_rtd_components(rtd, i, component) {
2819 const struct snd_soc_component_driver *drv = component->driver;
2822 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2824 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2826 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2828 rtd->ops.page = snd_soc_pcm_component_page;
2830 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2834 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2837 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2839 ret = snd_soc_pcm_component_new(rtd);
2841 dev_err(rtd->dev, "ASoC: pcm constructor failed for dailink %s: %d\n",
2842 rtd->dai_link->name, ret);
2846 pcm->no_device_suspend = true;
2848 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2849 (rtd->num_codecs > 1) ? "multicodec" : asoc_rtd_to_codec(rtd, 0)->name,
2850 (rtd->num_cpus > 1) ? "multicpu" : asoc_rtd_to_cpu(rtd, 0)->name);
2854 /* is the current PCM operation for this FE ? */
2855 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2857 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2861 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2863 /* is the current PCM operation for this BE ? */
2864 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2865 struct snd_soc_pcm_runtime *be, int stream)
2867 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2868 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2869 be->dpcm[stream].runtime_update))
2873 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2875 /* get the substream for this BE */
2876 struct snd_pcm_substream *
2877 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2879 return be->pcm->streams[stream].substream;
2881 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2883 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2884 struct snd_soc_pcm_runtime *be,
2886 const enum snd_soc_dpcm_state *states,
2889 struct snd_soc_dpcm *dpcm;
2892 unsigned long flags;
2895 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2896 for_each_dpcm_fe(be, stream, dpcm) {
2901 state = dpcm->fe->dpcm[stream].state;
2902 for (i = 0; i < num_states; i++) {
2903 if (state == states[i]) {
2909 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2911 /* it's safe to do this BE DAI */
2916 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2917 * are not running, paused or suspended for the specified stream direction.
2919 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2920 struct snd_soc_pcm_runtime *be, int stream)
2922 const enum snd_soc_dpcm_state state[] = {
2923 SND_SOC_DPCM_STATE_START,
2924 SND_SOC_DPCM_STATE_PAUSED,
2925 SND_SOC_DPCM_STATE_SUSPEND,
2928 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2930 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2933 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2934 * running, paused or suspended for the specified stream direction.
2936 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2937 struct snd_soc_pcm_runtime *be, int stream)
2939 const enum snd_soc_dpcm_state state[] = {
2940 SND_SOC_DPCM_STATE_START,
2941 SND_SOC_DPCM_STATE_PAUSED,
2942 SND_SOC_DPCM_STATE_SUSPEND,
2943 SND_SOC_DPCM_STATE_PREPARE,
2946 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2948 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);