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 soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
31 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
32 const char *func, int ret)
34 /* Positive, Zero values are not errors */
38 /* Negative values might be errors */
45 "ASoC: error at %s on %s: %d\n",
46 func, rtd->dai_link->name, ret);
52 static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd)
54 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
57 static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd)
59 mutex_unlock(&rtd->card->pcm_mutex);
62 #define snd_soc_dpcm_mutex_assert_held(rtd) \
63 lockdep_assert_held(&(rtd)->card->pcm_mutex)
65 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
68 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
71 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
72 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
74 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
77 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
80 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
81 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
83 #define DPCM_MAX_BE_USERS 8
85 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
87 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
89 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
91 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
94 #ifdef CONFIG_DEBUG_FS
95 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
98 case SND_SOC_DPCM_STATE_NEW:
100 case SND_SOC_DPCM_STATE_OPEN:
102 case SND_SOC_DPCM_STATE_HW_PARAMS:
104 case SND_SOC_DPCM_STATE_PREPARE:
106 case SND_SOC_DPCM_STATE_START:
108 case SND_SOC_DPCM_STATE_STOP:
110 case SND_SOC_DPCM_STATE_SUSPEND:
112 case SND_SOC_DPCM_STATE_PAUSED:
114 case SND_SOC_DPCM_STATE_HW_FREE:
116 case SND_SOC_DPCM_STATE_CLOSE:
123 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
124 int stream, char *buf, size_t size)
126 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
127 struct snd_soc_dpcm *dpcm;
131 offset += scnprintf(buf + offset, size - offset,
132 "[%s - %s]\n", fe->dai_link->name,
133 stream ? "Capture" : "Playback");
135 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
136 dpcm_state_string(fe->dpcm[stream].state));
138 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
139 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
140 offset += scnprintf(buf + offset, size - offset,
142 "Format = %s, Channels = %d, Rate = %d\n",
143 snd_pcm_format_name(params_format(params)),
144 params_channels(params),
145 params_rate(params));
148 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
150 if (list_empty(&fe->dpcm[stream].be_clients)) {
151 offset += scnprintf(buf + offset, size - offset,
152 " No active DSP links\n");
156 for_each_dpcm_be(fe, stream, dpcm) {
157 struct snd_soc_pcm_runtime *be = dpcm->be;
158 params = &be->dpcm[stream].hw_params;
160 offset += scnprintf(buf + offset, size - offset,
161 "- %s\n", be->dai_link->name);
163 offset += scnprintf(buf + offset, size - offset,
165 dpcm_state_string(be->dpcm[stream].state));
167 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
168 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
169 offset += scnprintf(buf + offset, size - offset,
171 "Format = %s, Channels = %d, Rate = %d\n",
172 snd_pcm_format_name(params_format(params)),
173 params_channels(params),
174 params_rate(params));
180 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
181 size_t count, loff_t *ppos)
183 struct snd_soc_pcm_runtime *fe = file->private_data;
184 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
188 if (fe->dai_link->num_cpus > 1) {
190 "%s doesn't support Multi CPU yet\n", __func__);
194 buf = kmalloc(out_count, GFP_KERNEL);
198 snd_soc_dpcm_mutex_lock(fe);
199 for_each_pcm_streams(stream)
200 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
201 offset += dpcm_show_state(fe, stream,
204 snd_soc_dpcm_mutex_unlock(fe);
206 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
212 static const struct file_operations dpcm_state_fops = {
214 .read = dpcm_state_read_file,
215 .llseek = default_llseek,
218 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
220 if (!rtd->dai_link->dynamic)
223 if (!rtd->card->debugfs_card_root)
226 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
227 rtd->card->debugfs_card_root);
229 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
230 rtd, &dpcm_state_fops);
233 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
237 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
238 stream ? "capture" : "playback");
240 dpcm->debugfs_state = debugfs_create_dir(
241 name, dpcm->fe->debugfs_dpcm_root);
242 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
248 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
250 debugfs_remove_recursive(dpcm->debugfs_state);
254 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
259 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
264 /* Set FE's runtime_update state; the state is protected via PCM stream lock
265 * for avoiding the race with trigger callback.
266 * If the state is unset and a trigger is pending while the previous operation,
267 * process the pending trigger action here.
269 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
270 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
271 int stream, enum snd_soc_dpcm_update state)
273 struct snd_pcm_substream *substream =
274 snd_soc_dpcm_get_substream(fe, stream);
276 snd_soc_dpcm_stream_lock_irq(fe, stream);
277 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
278 dpcm_fe_dai_do_trigger(substream,
279 fe->dpcm[stream].trigger_pending - 1);
280 fe->dpcm[stream].trigger_pending = 0;
282 fe->dpcm[stream].runtime_update = state;
283 snd_soc_dpcm_stream_unlock_irq(fe, stream);
286 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
287 int stream, enum snd_soc_dpcm_update state)
289 be->dpcm[stream].runtime_update = state;
293 * snd_soc_runtime_action() - Increment/Decrement active count for
294 * PCM runtime components
295 * @rtd: ASoC PCM runtime that is activated
296 * @stream: Direction of the PCM stream
297 * @action: Activate stream if 1. Deactivate if -1.
299 * Increments/Decrements the active count for all the DAIs and components
300 * attached to a PCM runtime.
301 * Should typically be called when a stream is opened.
303 * Must be called with the rtd->card->pcm_mutex being held
305 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
306 int stream, int action)
308 struct snd_soc_dai *dai;
311 snd_soc_dpcm_mutex_assert_held(rtd);
313 for_each_rtd_dais(rtd, i, dai)
314 snd_soc_dai_action(dai, stream, action);
316 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
319 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
320 * @rtd: The ASoC PCM runtime that should be checked.
322 * This function checks whether the power down delay should be ignored for a
323 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
324 * been configured to ignore the delay, or if none of the components benefits
325 * from having the delay.
327 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
329 struct snd_soc_component *component;
333 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
336 for_each_rtd_components(rtd, i, component)
337 ignore &= !component->driver->use_pmdown_time;
343 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
344 * @substream: the pcm substream
345 * @hw: the hardware parameters
347 * Sets the substream runtime hardware parameters.
349 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
350 const struct snd_pcm_hardware *hw)
352 substream->runtime->hw = *hw;
356 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
358 /* DPCM stream event, send event to FE and all active BEs. */
359 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
362 struct snd_soc_dpcm *dpcm;
364 snd_soc_dpcm_mutex_assert_held(fe);
366 for_each_dpcm_be(fe, dir, dpcm) {
368 struct snd_soc_pcm_runtime *be = dpcm->be;
370 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
371 be->dai_link->name, event, dir);
373 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
374 (be->dpcm[dir].users >= 1))
377 snd_soc_dapm_stream_event(be, dir, event);
380 snd_soc_dapm_stream_event(fe, dir, event);
385 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
386 struct snd_pcm_hw_params *params)
389 dai->rate = params_rate(params);
390 dai->channels = params_channels(params);
391 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
395 dai->sample_bits = 0;
399 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
400 struct snd_soc_dai *soc_dai)
402 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
405 if (!snd_soc_dai_active(soc_dai))
408 #define __soc_pcm_apply_symmetry(name, NAME) \
409 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
410 rtd->dai_link->symmetric_##name)) { \
411 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
412 #name, soc_dai->name); \
414 ret = snd_pcm_hw_constraint_single(substream->runtime, \
415 SNDRV_PCM_HW_PARAM_##NAME,\
418 dev_err(soc_dai->dev, \
419 "ASoC: Unable to apply %s constraint: %d\n",\
425 __soc_pcm_apply_symmetry(rate, RATE);
426 __soc_pcm_apply_symmetry(channels, CHANNELS);
427 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
432 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
433 struct snd_pcm_hw_params *params)
435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
436 struct snd_soc_dai d;
437 struct snd_soc_dai *dai;
438 struct snd_soc_dai *cpu_dai;
439 unsigned int symmetry, i;
442 soc_pcm_set_dai_params(&d, params);
444 #define __soc_pcm_params_symmetry(xxx) \
445 symmetry = rtd->dai_link->symmetric_##xxx; \
446 for_each_rtd_dais(rtd, i, dai) \
447 symmetry |= dai->driver->symmetric_##xxx; \
450 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
451 if (!snd_soc_dai_is_dummy(cpu_dai) && \
452 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
453 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
454 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
458 /* reject unmatched parameters when applying symmetry */
459 __soc_pcm_params_symmetry(rate);
460 __soc_pcm_params_symmetry(channels);
461 __soc_pcm_params_symmetry(sample_bits);
466 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
468 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
469 struct snd_soc_dai_link *link = rtd->dai_link;
470 struct snd_soc_dai *dai;
471 unsigned int symmetry, i;
473 symmetry = link->symmetric_rate ||
474 link->symmetric_channels ||
475 link->symmetric_sample_bits;
477 for_each_rtd_dais(rtd, i, dai)
478 symmetry = symmetry ||
479 dai->driver->symmetric_rate ||
480 dai->driver->symmetric_channels ||
481 dai->driver->symmetric_sample_bits;
484 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
487 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
489 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
495 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
497 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
501 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
503 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
504 struct snd_soc_dai *cpu_dai;
505 struct snd_soc_dai *codec_dai;
506 int stream = substream->stream;
508 unsigned int bits = 0, cpu_bits = 0;
510 for_each_rtd_codec_dais(rtd, i, codec_dai) {
511 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
513 if (pcm_codec->sig_bits == 0) {
517 bits = max(pcm_codec->sig_bits, bits);
520 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
521 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
523 if (pcm_cpu->sig_bits == 0) {
527 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
530 soc_pcm_set_msb(substream, bits);
531 soc_pcm_set_msb(substream, cpu_bits);
534 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
536 hw->rates = UINT_MAX;
538 hw->rate_max = UINT_MAX;
539 hw->channels_min = 0;
540 hw->channels_max = UINT_MAX;
541 hw->formats = ULLONG_MAX;
544 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
545 struct snd_soc_pcm_stream *p)
547 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
549 /* setup hw->rate_min/max via hw->rates first */
550 snd_pcm_hw_limit_rates(hw);
552 /* update hw->rate_min/max by snd_soc_pcm_stream */
553 hw->rate_min = max(hw->rate_min, p->rate_min);
554 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
557 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
558 struct snd_soc_pcm_stream *p)
560 hw->channels_min = max(hw->channels_min, p->channels_min);
561 hw->channels_max = min(hw->channels_max, p->channels_max);
564 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
565 struct snd_soc_pcm_stream *p)
567 hw->formats &= p->formats;
571 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
572 * @rtd: ASoC PCM runtime
573 * @hw: PCM hardware parameters (output)
574 * @stream: Direction of the PCM stream
576 * Calculates the subset of stream parameters supported by all DAIs
577 * associated with the PCM stream.
579 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
580 struct snd_pcm_hardware *hw, int stream)
582 struct snd_soc_dai *codec_dai;
583 struct snd_soc_dai *cpu_dai;
584 struct snd_soc_pcm_stream *codec_stream;
585 struct snd_soc_pcm_stream *cpu_stream;
586 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
591 /* first calculate min/max only for CPUs in the DAI link */
592 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
595 * Skip CPUs which don't support the current stream type.
596 * Otherwise, since the rate, channel, and format values will
597 * zero in that case, we would have no usable settings left,
598 * causing the resulting setup to fail.
600 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
603 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
605 soc_pcm_hw_update_chan(hw, cpu_stream);
606 soc_pcm_hw_update_rate(hw, cpu_stream);
607 soc_pcm_hw_update_format(hw, cpu_stream);
609 cpu_chan_min = hw->channels_min;
610 cpu_chan_max = hw->channels_max;
612 /* second calculate min/max only for CODECs in the DAI link */
613 for_each_rtd_codec_dais(rtd, i, codec_dai) {
616 * Skip CODECs which don't support the current stream type.
617 * Otherwise, since the rate, channel, and format values will
618 * zero in that case, we would have no usable settings left,
619 * causing the resulting setup to fail.
621 if (!snd_soc_dai_stream_valid(codec_dai, stream))
624 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
626 soc_pcm_hw_update_chan(hw, codec_stream);
627 soc_pcm_hw_update_rate(hw, codec_stream);
628 soc_pcm_hw_update_format(hw, codec_stream);
631 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
632 if (!hw->channels_min)
636 * chan min/max cannot be enforced if there are multiple CODEC DAIs
637 * connected to CPU DAI(s), use CPU DAI's directly and let
638 * channel allocation be fixed up later
640 if (rtd->dai_link->num_codecs > 1) {
641 hw->channels_min = cpu_chan_min;
642 hw->channels_max = cpu_chan_max;
647 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
649 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
651 struct snd_pcm_hardware *hw = &substream->runtime->hw;
652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
653 u64 formats = hw->formats;
656 * At least one CPU and one CODEC should match. Otherwise, we should
657 * have bailed out on a higher level, since there would be no CPU or
658 * CODEC to support the transfer direction in that case.
660 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
663 hw->formats &= formats;
666 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
668 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
669 struct snd_soc_component *component;
672 for_each_rtd_components(rtd, i, component) {
673 ret = snd_soc_component_module_get_when_open(component, substream);
677 ret = snd_soc_component_open(component, substream);
685 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
688 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
689 struct snd_soc_component *component;
692 for_each_rtd_components(rtd, i, component) {
693 int r = snd_soc_component_close(component, substream, rollback);
695 ret = r; /* use last ret */
697 snd_soc_component_module_put_when_close(component, substream, rollback);
703 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
704 struct snd_pcm_substream *substream, int rollback)
706 struct snd_soc_component *component;
707 struct snd_soc_dai *dai;
710 snd_soc_dpcm_mutex_assert_held(rtd);
713 snd_soc_runtime_deactivate(rtd, substream->stream);
715 for_each_rtd_dais(rtd, i, dai)
716 snd_soc_dai_shutdown(dai, substream, rollback);
718 snd_soc_link_shutdown(substream, rollback);
720 soc_pcm_components_close(substream, rollback);
722 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
724 for_each_rtd_components(rtd, i, component)
725 if (!snd_soc_component_active(component))
726 pinctrl_pm_select_sleep_state(component->dev);
732 * Called by ALSA when a PCM substream is closed. Private data can be
733 * freed here. The cpu DAI, codec DAI, machine and components are also
736 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
737 struct snd_pcm_substream *substream)
739 return soc_pcm_clean(rtd, substream, 0);
742 /* PCM close ops for non-DPCM streams */
743 static int soc_pcm_close(struct snd_pcm_substream *substream)
745 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
747 snd_soc_dpcm_mutex_lock(rtd);
748 __soc_pcm_close(rtd, substream);
749 snd_soc_dpcm_mutex_unlock(rtd);
753 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
755 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
756 struct snd_pcm_hardware *hw = &substream->runtime->hw;
757 const char *name_cpu = soc_cpu_dai_name(rtd);
758 const char *name_codec = soc_codec_dai_name(rtd);
760 struct device *dev = rtd->dev;
770 err_msg = "channels";
771 if (!hw->channels_min || !hw->channels_max ||
772 hw->channels_min > hw->channels_max)
775 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
777 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
778 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
780 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
786 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
787 name_codec, name_cpu, err_msg);
792 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
793 * then initialized and any private data can be allocated. This also calls
794 * startup for the cpu DAI, component, machine and codec DAI.
796 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
797 struct snd_pcm_substream *substream)
799 struct snd_soc_component *component;
800 struct snd_soc_dai *dai;
803 snd_soc_dpcm_mutex_assert_held(rtd);
805 for_each_rtd_components(rtd, i, component)
806 pinctrl_pm_select_default_state(component->dev);
808 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
812 ret = soc_pcm_components_open(substream);
816 ret = snd_soc_link_startup(substream);
820 /* startup the audio subsystem */
821 for_each_rtd_dais(rtd, i, dai) {
822 ret = snd_soc_dai_startup(dai, substream);
827 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
828 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
831 /* Check that the codec and cpu DAIs are compatible */
832 soc_pcm_init_runtime_hw(substream);
834 soc_pcm_update_symmetry(substream);
836 ret = soc_hw_sanity_check(substream);
840 soc_pcm_apply_msb(substream);
842 /* Symmetry only applies if we've already got an active stream. */
843 for_each_rtd_dais(rtd, i, dai) {
844 ret = soc_pcm_apply_symmetry(substream, dai);
849 snd_soc_runtime_activate(rtd, substream->stream);
853 soc_pcm_clean(rtd, substream, 1);
855 return soc_pcm_ret(rtd, ret);
858 /* PCM open ops for non-DPCM streams */
859 static int soc_pcm_open(struct snd_pcm_substream *substream)
861 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
864 snd_soc_dpcm_mutex_lock(rtd);
865 ret = __soc_pcm_open(rtd, substream);
866 snd_soc_dpcm_mutex_unlock(rtd);
871 * Called by ALSA when the PCM substream is prepared, can set format, sample
872 * rate, etc. This function is non atomic and can be called multiple times,
873 * it can refer to the runtime info.
875 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
876 struct snd_pcm_substream *substream)
878 struct snd_soc_dai *dai;
881 snd_soc_dpcm_mutex_assert_held(rtd);
883 ret = snd_soc_link_prepare(substream);
887 ret = snd_soc_pcm_component_prepare(substream);
891 ret = snd_soc_pcm_dai_prepare(substream);
895 /* cancel any delayed stream shutdown that is pending */
896 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
899 cancel_delayed_work(&rtd->delayed_work);
902 snd_soc_dapm_stream_event(rtd, substream->stream,
903 SND_SOC_DAPM_STREAM_START);
905 for_each_rtd_dais(rtd, i, dai)
906 snd_soc_dai_digital_mute(dai, 0, substream->stream);
909 return soc_pcm_ret(rtd, ret);
912 /* PCM prepare ops for non-DPCM streams */
913 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
915 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
918 snd_soc_dpcm_mutex_lock(rtd);
919 ret = __soc_pcm_prepare(rtd, substream);
920 snd_soc_dpcm_mutex_unlock(rtd);
924 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
927 struct snd_interval *interval;
928 int channels = hweight_long(mask);
930 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
931 interval->min = channels;
932 interval->max = channels;
935 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
936 struct snd_pcm_substream *substream, int rollback)
938 struct snd_soc_dai *dai;
941 snd_soc_dpcm_mutex_assert_held(rtd);
943 /* clear the corresponding DAIs parameters when going to be inactive */
944 for_each_rtd_dais(rtd, i, dai) {
945 if (snd_soc_dai_active(dai) == 1)
946 soc_pcm_set_dai_params(dai, NULL);
948 if (snd_soc_dai_stream_active(dai, substream->stream) == 1)
949 snd_soc_dai_digital_mute(dai, 1, substream->stream);
952 /* run the stream event */
953 snd_soc_dapm_stream_stop(rtd, substream->stream);
955 /* free any machine hw params */
956 snd_soc_link_hw_free(substream, rollback);
958 /* free any component resources */
959 snd_soc_pcm_component_hw_free(substream, rollback);
961 /* now free hw params for the DAIs */
962 for_each_rtd_dais(rtd, i, dai)
963 if (snd_soc_dai_stream_valid(dai, substream->stream))
964 snd_soc_dai_hw_free(dai, substream, rollback);
970 * Frees resources allocated by hw_params, can be called multiple times
972 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
973 struct snd_pcm_substream *substream)
975 return soc_pcm_hw_clean(rtd, substream, 0);
978 /* hw_free PCM ops for non-DPCM streams */
979 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
981 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
984 snd_soc_dpcm_mutex_lock(rtd);
985 ret = __soc_pcm_hw_free(rtd, substream);
986 snd_soc_dpcm_mutex_unlock(rtd);
991 * Called by ALSA when the hardware params are set by application. This
992 * function can also be called multiple times and can allocate buffers
993 * (using snd_pcm_lib_* ). It's non-atomic.
995 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
996 struct snd_pcm_substream *substream,
997 struct snd_pcm_hw_params *params)
999 struct snd_soc_dai *cpu_dai;
1000 struct snd_soc_dai *codec_dai;
1003 snd_soc_dpcm_mutex_assert_held(rtd);
1005 ret = soc_pcm_params_symmetry(substream, params);
1009 ret = snd_soc_link_hw_params(substream, params);
1013 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1014 struct snd_pcm_hw_params codec_params;
1017 * Skip CODECs which don't support the current stream type,
1018 * the idea being that if a CODEC is not used for the currently
1019 * set up transfer direction, it should not need to be
1020 * configured, especially since the configuration used might
1021 * not even be supported by that CODEC. There may be cases
1022 * however where a CODEC needs to be set up although it is
1023 * actually not being used for the transfer, e.g. if a
1024 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1025 * for the DAI link including a playback-only CODEC.
1026 * If this becomes necessary, we will have to augment the
1027 * machine driver setup with information on how to act, so
1028 * we can do the right thing here.
1030 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1033 /* copy params for each codec */
1034 codec_params = *params;
1036 /* fixup params based on TDM slot masks */
1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1039 soc_pcm_codec_params_fixup(&codec_params,
1040 codec_dai->tx_mask);
1042 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
1044 soc_pcm_codec_params_fixup(&codec_params,
1045 codec_dai->rx_mask);
1047 ret = snd_soc_dai_hw_params(codec_dai, substream,
1052 soc_pcm_set_dai_params(codec_dai, &codec_params);
1053 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
1056 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1058 * Skip CPUs which don't support the current stream
1059 * type. See soc_pcm_init_runtime_hw() for more details
1061 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1064 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
1068 /* store the parameters for each DAI */
1069 soc_pcm_set_dai_params(cpu_dai, params);
1070 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1073 ret = snd_soc_pcm_component_hw_params(substream, params);
1076 soc_pcm_hw_clean(rtd, substream, 1);
1078 return soc_pcm_ret(rtd, ret);
1081 /* hw_params PCM ops for non-DPCM streams */
1082 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1083 struct snd_pcm_hw_params *params)
1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1088 snd_soc_dpcm_mutex_lock(rtd);
1089 ret = __soc_pcm_hw_params(rtd, substream, params);
1090 snd_soc_dpcm_mutex_unlock(rtd);
1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1097 int ret = -EINVAL, _ret = 0;
1101 case SNDRV_PCM_TRIGGER_START:
1102 case SNDRV_PCM_TRIGGER_RESUME:
1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1104 ret = snd_soc_link_trigger(substream, cmd, 0);
1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1121 case SNDRV_PCM_TRIGGER_START:
1122 cmd = SNDRV_PCM_TRIGGER_STOP;
1124 case SNDRV_PCM_TRIGGER_RESUME:
1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1134 case SNDRV_PCM_TRIGGER_STOP:
1135 case SNDRV_PCM_TRIGGER_SUSPEND:
1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1137 if (rtd->dai_link->stop_dma_first) {
1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1154 ret = snd_soc_link_trigger(substream, cmd, rollback);
1165 * soc level wrapper for pointer callback
1166 * If cpu_dai, codec_dai, component driver has the delay callback, then
1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1171 struct snd_pcm_runtime *runtime = substream->runtime;
1172 snd_pcm_uframes_t offset = 0;
1173 snd_pcm_sframes_t codec_delay = 0;
1174 snd_pcm_sframes_t cpu_delay = 0;
1176 offset = snd_soc_pcm_component_pointer(substream);
1178 /* should be called *after* snd_soc_pcm_component_pointer() */
1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1182 runtime->delay = cpu_delay + codec_delay;
1187 /* connect a FE and BE */
1188 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1189 struct snd_soc_pcm_runtime *be, int stream)
1191 struct snd_pcm_substream *fe_substream;
1192 struct snd_pcm_substream *be_substream;
1193 struct snd_soc_dpcm *dpcm;
1195 snd_soc_dpcm_mutex_assert_held(fe);
1197 /* only add new dpcms */
1198 for_each_dpcm_be(fe, stream, dpcm) {
1199 if (dpcm->be == be && dpcm->fe == fe)
1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1204 be_substream = snd_soc_dpcm_get_substream(be, stream);
1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1212 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1213 be_substream->pcm->nonatomic = 1;
1216 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1222 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1223 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1224 snd_soc_dpcm_stream_lock_irq(fe, stream);
1225 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1226 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1227 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1229 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1230 stream ? "capture" : "playback", fe->dai_link->name,
1231 stream ? "<-" : "->", be->dai_link->name);
1233 dpcm_create_debugfs_state(dpcm, stream);
1238 /* reparent a BE onto another FE */
1239 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1240 struct snd_soc_pcm_runtime *be, int stream)
1242 struct snd_soc_dpcm *dpcm;
1243 struct snd_pcm_substream *fe_substream, *be_substream;
1245 /* reparent if BE is connected to other FEs */
1246 if (!be->dpcm[stream].users)
1249 be_substream = snd_soc_dpcm_get_substream(be, stream);
1253 for_each_dpcm_fe(be, stream, dpcm) {
1257 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1258 stream ? "capture" : "playback",
1259 dpcm->fe->dai_link->name,
1260 stream ? "<-" : "->", dpcm->be->dai_link->name);
1262 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1263 be_substream->runtime = fe_substream->runtime;
1268 /* disconnect a BE and FE */
1269 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1271 struct snd_soc_dpcm *dpcm, *d;
1272 LIST_HEAD(deleted_dpcms);
1274 snd_soc_dpcm_mutex_assert_held(fe);
1276 snd_soc_dpcm_stream_lock_irq(fe, stream);
1277 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1278 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1279 stream ? "capture" : "playback",
1280 dpcm->be->dai_link->name);
1282 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1285 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1286 stream ? "capture" : "playback", fe->dai_link->name,
1287 stream ? "<-" : "->", dpcm->be->dai_link->name);
1289 /* BEs still alive need new FE */
1290 dpcm_be_reparent(fe, dpcm->be, stream);
1292 list_del(&dpcm->list_be);
1293 list_move(&dpcm->list_fe, &deleted_dpcms);
1295 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1297 while (!list_empty(&deleted_dpcms)) {
1298 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1300 list_del(&dpcm->list_fe);
1301 dpcm_remove_debugfs_state(dpcm);
1306 /* get BE for DAI widget and stream */
1307 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1308 struct snd_soc_dapm_widget *widget, int stream)
1310 struct snd_soc_pcm_runtime *be;
1311 struct snd_soc_dapm_widget *w;
1312 struct snd_soc_dai *dai;
1315 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1317 for_each_card_rtds(card, be) {
1319 if (!be->dai_link->no_pcm)
1322 if (!snd_soc_dpcm_get_substream(be, stream))
1325 for_each_rtd_dais(be, i, dai) {
1326 w = snd_soc_dai_get_widget(dai, stream);
1328 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1329 w ? w->name : "(not set)");
1336 /* Widget provided is not a BE */
1340 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1341 struct snd_soc_dapm_widget *widget)
1343 struct snd_soc_dapm_widget *w;
1346 for_each_dapm_widgets(list, i, w)
1353 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1355 struct snd_soc_card *card = widget->dapm->card;
1356 struct snd_soc_pcm_runtime *rtd;
1359 /* adjust dir to stream */
1360 if (dir == SND_SOC_DAPM_DIR_OUT)
1361 stream = SNDRV_PCM_STREAM_PLAYBACK;
1363 stream = SNDRV_PCM_STREAM_CAPTURE;
1365 rtd = dpcm_get_be(card, widget, stream);
1371 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1373 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1374 int stream, struct snd_soc_dapm_widget_list **list)
1376 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1379 if (fe->dai_link->num_cpus > 1) {
1381 "%s doesn't support Multi CPU yet\n", __func__);
1385 /* get number of valid DAI paths and their widgets */
1386 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1387 fe->card->component_chaining ?
1388 NULL : dpcm_end_walk_at_be);
1391 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1392 stream ? "capture" : "playback");
1393 else if (paths == 0)
1394 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1395 stream ? "capture" : "playback");
1400 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1402 snd_soc_dapm_dai_free_widgets(list);
1405 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1406 struct snd_soc_dapm_widget_list *list)
1408 struct snd_soc_dai *dai;
1411 /* is there a valid DAI widget for this BE */
1412 for_each_rtd_dais(dpcm->be, i, dai) {
1413 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1416 * The BE is pruned only if none of the dai
1417 * widgets are in the active list.
1419 if (widget && widget_in_list(list, widget))
1426 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1427 struct snd_soc_dapm_widget_list **list_)
1429 struct snd_soc_dpcm *dpcm;
1432 /* Destroy any old FE <--> BE connections */
1433 for_each_dpcm_be(fe, stream, dpcm) {
1434 if (dpcm_be_is_active(dpcm, stream, *list_))
1437 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1438 stream ? "capture" : "playback",
1439 dpcm->be->dai_link->name, fe->dai_link->name);
1440 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1441 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1445 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1449 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1450 struct snd_soc_dapm_widget_list **list_)
1452 struct snd_soc_card *card = fe->card;
1453 struct snd_soc_dapm_widget_list *list = *list_;
1454 struct snd_soc_pcm_runtime *be;
1455 struct snd_soc_dapm_widget *widget;
1456 int i, new = 0, err;
1458 /* don't connect if FE is not running */
1459 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1462 /* Create any new FE <--> BE connections */
1463 for_each_dapm_widgets(list, i, widget) {
1465 switch (widget->id) {
1466 case snd_soc_dapm_dai_in:
1467 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1470 case snd_soc_dapm_dai_out:
1471 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1478 /* is there a valid BE rtd for this widget */
1479 be = dpcm_get_be(card, widget, stream);
1481 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1487 * Filter for systems with 'component_chaining' enabled.
1488 * This helps to avoid unnecessary re-configuration of an
1489 * already active BE on such systems.
1491 if (fe->card->component_chaining &&
1492 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1493 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1496 /* newly connected FE and BE */
1497 err = dpcm_be_connect(fe, be, stream);
1499 dev_err(fe->dev, "ASoC: can't connect %s\n",
1502 } else if (err == 0) /* already connected */
1506 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1510 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1515 * Find the corresponding BE DAIs that source or sink audio to this
1518 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1519 int stream, struct snd_soc_dapm_widget_list **list, int new)
1522 return dpcm_add_paths(fe, stream, list);
1524 return dpcm_prune_paths(fe, stream, list);
1527 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1529 struct snd_soc_dpcm *dpcm;
1531 for_each_dpcm_be(fe, stream, dpcm)
1532 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1535 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1536 int do_hw_free, struct snd_soc_dpcm *last)
1538 struct snd_soc_dpcm *dpcm;
1540 /* disable any enabled and non active backends */
1541 for_each_dpcm_be(fe, stream, dpcm) {
1542 struct snd_soc_pcm_runtime *be = dpcm->be;
1543 struct snd_pcm_substream *be_substream =
1544 snd_soc_dpcm_get_substream(be, stream);
1549 /* is this op for this BE ? */
1550 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1553 if (be->dpcm[stream].users == 0) {
1554 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1555 stream ? "capture" : "playback",
1556 be->dpcm[stream].state);
1560 if (--be->dpcm[stream].users != 0)
1563 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1567 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1568 __soc_pcm_hw_free(be, be_substream);
1569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1573 __soc_pcm_close(be, be_substream);
1574 be_substream->runtime = NULL;
1575 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1579 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1581 struct snd_soc_pcm_runtime *be;
1582 struct snd_soc_dpcm *dpcm;
1585 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1586 for_each_dpcm_be(fe, stream, dpcm) {
1587 struct snd_pcm_substream *be_substream;
1590 be_substream = snd_soc_dpcm_get_substream(be, stream);
1592 if (!be_substream) {
1593 dev_err(be->dev, "ASoC: no backend %s stream\n",
1594 stream ? "capture" : "playback");
1598 /* is this op for this BE ? */
1599 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1602 /* first time the dpcm is open ? */
1603 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1604 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1605 stream ? "capture" : "playback",
1606 be->dpcm[stream].state);
1610 if (be->dpcm[stream].users++ != 0)
1613 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1617 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1618 stream ? "capture" : "playback", be->dai_link->name);
1620 be_substream->runtime = be->dpcm[stream].runtime;
1621 err = __soc_pcm_open(be, be_substream);
1623 be->dpcm[stream].users--;
1624 if (be->dpcm[stream].users < 0)
1625 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1626 stream ? "capture" : "playback",
1627 be->dpcm[stream].state);
1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1632 be->dpcm[stream].be_start = 0;
1633 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1640 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1642 return soc_pcm_ret(fe, err);
1645 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1647 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1648 struct snd_pcm_runtime *runtime = substream->runtime;
1649 struct snd_pcm_hardware *hw = &runtime->hw;
1650 struct snd_soc_dai *dai;
1651 int stream = substream->stream;
1654 soc_pcm_hw_init(hw);
1656 for_each_rtd_cpu_dais(fe, i, dai) {
1657 struct snd_soc_pcm_stream *cpu_stream;
1660 * Skip CPUs which don't support the current stream
1661 * type. See soc_pcm_init_runtime_hw() for more details
1663 if (!snd_soc_dai_stream_valid(dai, stream))
1666 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1668 soc_pcm_hw_update_rate(hw, cpu_stream);
1669 soc_pcm_hw_update_chan(hw, cpu_stream);
1670 soc_pcm_hw_update_format(hw, cpu_stream);
1675 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1677 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1678 struct snd_pcm_runtime *runtime = substream->runtime;
1679 struct snd_pcm_hardware *hw = &runtime->hw;
1680 struct snd_soc_dpcm *dpcm;
1681 struct snd_soc_dai *dai;
1682 int stream = substream->stream;
1684 if (!fe->dai_link->dpcm_merged_format)
1688 * It returns merged BE codec format
1689 * if FE want to use it (= dpcm_merged_format)
1692 for_each_dpcm_be(fe, stream, dpcm) {
1693 struct snd_soc_pcm_runtime *be = dpcm->be;
1694 struct snd_soc_pcm_stream *codec_stream;
1697 for_each_rtd_codec_dais(be, i, dai) {
1699 * Skip CODECs which don't support the current stream
1700 * type. See soc_pcm_init_runtime_hw() for more details
1702 if (!snd_soc_dai_stream_valid(dai, stream))
1705 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1707 soc_pcm_hw_update_format(hw, codec_stream);
1712 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1714 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1715 struct snd_pcm_runtime *runtime = substream->runtime;
1716 struct snd_pcm_hardware *hw = &runtime->hw;
1717 struct snd_soc_dpcm *dpcm;
1718 int stream = substream->stream;
1720 if (!fe->dai_link->dpcm_merged_chan)
1724 * It returns merged BE codec channel;
1725 * if FE want to use it (= dpcm_merged_chan)
1728 for_each_dpcm_be(fe, stream, dpcm) {
1729 struct snd_soc_pcm_runtime *be = dpcm->be;
1730 struct snd_soc_pcm_stream *cpu_stream;
1731 struct snd_soc_dai *dai;
1734 for_each_rtd_cpu_dais(be, i, dai) {
1736 * Skip CPUs which don't support the current stream
1737 * type. See soc_pcm_init_runtime_hw() for more details
1739 if (!snd_soc_dai_stream_valid(dai, stream))
1742 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1744 soc_pcm_hw_update_chan(hw, cpu_stream);
1748 * chan min/max cannot be enforced if there are multiple CODEC
1749 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1751 if (be->dai_link->num_codecs == 1) {
1752 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1753 asoc_rtd_to_codec(be, 0), stream);
1755 soc_pcm_hw_update_chan(hw, codec_stream);
1760 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1762 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1763 struct snd_pcm_runtime *runtime = substream->runtime;
1764 struct snd_pcm_hardware *hw = &runtime->hw;
1765 struct snd_soc_dpcm *dpcm;
1766 int stream = substream->stream;
1768 if (!fe->dai_link->dpcm_merged_rate)
1772 * It returns merged BE codec channel;
1773 * if FE want to use it (= dpcm_merged_chan)
1776 for_each_dpcm_be(fe, stream, dpcm) {
1777 struct snd_soc_pcm_runtime *be = dpcm->be;
1778 struct snd_soc_pcm_stream *pcm;
1779 struct snd_soc_dai *dai;
1782 for_each_rtd_dais(be, i, dai) {
1784 * Skip DAIs which don't support the current stream
1785 * type. See soc_pcm_init_runtime_hw() for more details
1787 if (!snd_soc_dai_stream_valid(dai, stream))
1790 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1792 soc_pcm_hw_update_rate(hw, pcm);
1797 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1800 struct snd_soc_dpcm *dpcm;
1801 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1802 struct snd_soc_dai *fe_cpu_dai;
1806 /* apply symmetry for FE */
1807 soc_pcm_update_symmetry(fe_substream);
1809 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1810 /* Symmetry only applies if we've got an active stream. */
1811 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1816 /* apply symmetry for BE */
1817 for_each_dpcm_be(fe, stream, dpcm) {
1818 struct snd_soc_pcm_runtime *be = dpcm->be;
1819 struct snd_pcm_substream *be_substream =
1820 snd_soc_dpcm_get_substream(be, stream);
1821 struct snd_soc_pcm_runtime *rtd;
1822 struct snd_soc_dai *dai;
1824 /* A backend may not have the requested substream */
1828 rtd = asoc_substream_to_rtd(be_substream);
1829 if (rtd->dai_link->be_hw_params_fixup)
1832 soc_pcm_update_symmetry(be_substream);
1834 /* Symmetry only applies if we've got an active stream. */
1835 for_each_rtd_dais(rtd, i, dai) {
1836 err = soc_pcm_apply_symmetry(fe_substream, dai);
1842 return soc_pcm_ret(fe, err);
1845 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1847 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1848 int stream = fe_substream->stream, ret = 0;
1850 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1852 ret = dpcm_be_dai_startup(fe, stream);
1856 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1858 /* start the DAI frontend */
1859 ret = __soc_pcm_open(fe, fe_substream);
1863 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1865 dpcm_runtime_setup_fe(fe_substream);
1867 dpcm_runtime_setup_be_format(fe_substream);
1868 dpcm_runtime_setup_be_chan(fe_substream);
1869 dpcm_runtime_setup_be_rate(fe_substream);
1871 ret = dpcm_apply_symmetry(fe_substream, stream);
1875 dpcm_be_dai_startup_unwind(fe, stream);
1877 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1879 return soc_pcm_ret(fe, ret);
1882 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1884 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1885 int stream = substream->stream;
1887 snd_soc_dpcm_mutex_assert_held(fe);
1889 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1891 /* shutdown the BEs */
1892 dpcm_be_dai_shutdown(fe, stream);
1894 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1896 /* now shutdown the frontend */
1897 __soc_pcm_close(fe, substream);
1899 /* run the stream stop event */
1900 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1902 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1903 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1907 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1909 struct snd_soc_dpcm *dpcm;
1911 /* only hw_params backends that are either sinks or sources
1912 * to this frontend DAI */
1913 for_each_dpcm_be(fe, stream, dpcm) {
1915 struct snd_soc_pcm_runtime *be = dpcm->be;
1916 struct snd_pcm_substream *be_substream =
1917 snd_soc_dpcm_get_substream(be, stream);
1919 /* is this op for this BE ? */
1920 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1923 /* only free hw when no longer used - check all FEs */
1924 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1927 /* do not free hw if this BE is used by other FE */
1928 if (be->dpcm[stream].users > 1)
1931 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1932 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1939 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1940 be->dai_link->name);
1942 __soc_pcm_hw_free(be, be_substream);
1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1948 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1950 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1951 int stream = substream->stream;
1953 snd_soc_dpcm_mutex_lock(fe);
1954 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1956 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1958 /* call hw_free on the frontend */
1959 soc_pcm_hw_clean(fe, substream, 0);
1961 /* only hw_params backends that are either sinks or sources
1962 * to this frontend DAI */
1963 dpcm_be_dai_hw_free(fe, stream);
1965 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1966 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1968 snd_soc_dpcm_mutex_unlock(fe);
1972 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1974 struct snd_soc_pcm_runtime *be;
1975 struct snd_pcm_substream *be_substream;
1976 struct snd_soc_dpcm *dpcm;
1979 for_each_dpcm_be(fe, stream, dpcm) {
1980 struct snd_pcm_hw_params hw_params;
1983 be_substream = snd_soc_dpcm_get_substream(be, stream);
1985 /* is this op for this BE ? */
1986 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1989 /* copy params for each dpcm */
1990 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
1991 sizeof(struct snd_pcm_hw_params));
1993 /* perform any hw_params fixups */
1994 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
1998 /* copy the fixed-up hw params for BE dai */
1999 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2000 sizeof(struct snd_pcm_hw_params));
2002 /* only allow hw_params() if no connected FEs are running */
2003 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2006 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2007 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2008 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2011 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2012 be->dai_link->name);
2014 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2018 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2023 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2024 __func__, be->dai_link->name, ret);
2026 /* disable any enabled and non active backends */
2027 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2029 be_substream = snd_soc_dpcm_get_substream(be, stream);
2031 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2034 /* only allow hw_free() if no connected FEs are running */
2035 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2038 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2039 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2040 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2044 __soc_pcm_hw_free(be, be_substream);
2050 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2051 struct snd_pcm_hw_params *params)
2053 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2054 int ret, stream = substream->stream;
2056 snd_soc_dpcm_mutex_lock(fe);
2057 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2059 memcpy(&fe->dpcm[stream].hw_params, params,
2060 sizeof(struct snd_pcm_hw_params));
2061 ret = dpcm_be_dai_hw_params(fe, stream);
2065 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2066 fe->dai_link->name, params_rate(params),
2067 params_channels(params), params_format(params));
2069 /* call hw_params on the frontend */
2070 ret = __soc_pcm_hw_params(fe, substream, params);
2072 dpcm_be_dai_hw_free(fe, stream);
2074 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2077 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2078 snd_soc_dpcm_mutex_unlock(fe);
2080 return soc_pcm_ret(fe, ret);
2083 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2086 struct snd_soc_pcm_runtime *be;
2087 bool pause_stop_transition;
2088 struct snd_soc_dpcm *dpcm;
2089 unsigned long flags;
2092 for_each_dpcm_be(fe, stream, dpcm) {
2093 struct snd_pcm_substream *be_substream;
2096 be_substream = snd_soc_dpcm_get_substream(be, stream);
2098 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2100 /* is this op for this BE ? */
2101 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2104 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2105 be->dai_link->name, cmd);
2108 case SNDRV_PCM_TRIGGER_START:
2109 if (!be->dpcm[stream].be_start &&
2110 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2115 be->dpcm[stream].be_start++;
2116 if (be->dpcm[stream].be_start != 1)
2119 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2120 ret = soc_pcm_trigger(be_substream,
2121 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2123 ret = soc_pcm_trigger(be_substream,
2124 SNDRV_PCM_TRIGGER_START);
2126 be->dpcm[stream].be_start--;
2130 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2132 case SNDRV_PCM_TRIGGER_RESUME:
2133 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2136 be->dpcm[stream].be_start++;
2137 if (be->dpcm[stream].be_start != 1)
2140 ret = soc_pcm_trigger(be_substream, cmd);
2142 be->dpcm[stream].be_start--;
2146 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2148 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2149 if (!be->dpcm[stream].be_start &&
2150 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2154 fe->dpcm[stream].fe_pause = false;
2155 be->dpcm[stream].be_pause--;
2157 be->dpcm[stream].be_start++;
2158 if (be->dpcm[stream].be_start != 1)
2161 ret = soc_pcm_trigger(be_substream, cmd);
2163 be->dpcm[stream].be_start--;
2167 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2169 case SNDRV_PCM_TRIGGER_STOP:
2170 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2171 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2174 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2175 be->dpcm[stream].be_start--;
2177 if (be->dpcm[stream].be_start != 0)
2180 pause_stop_transition = false;
2181 if (fe->dpcm[stream].fe_pause) {
2182 pause_stop_transition = true;
2183 fe->dpcm[stream].fe_pause = false;
2184 be->dpcm[stream].be_pause--;
2187 if (be->dpcm[stream].be_pause != 0)
2188 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2190 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2193 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2194 be->dpcm[stream].be_start++;
2195 if (pause_stop_transition) {
2196 fe->dpcm[stream].fe_pause = true;
2197 be->dpcm[stream].be_pause++;
2202 if (be->dpcm[stream].be_pause != 0)
2203 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2205 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2208 case SNDRV_PCM_TRIGGER_SUSPEND:
2209 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2212 be->dpcm[stream].be_start--;
2213 if (be->dpcm[stream].be_start != 0)
2216 ret = soc_pcm_trigger(be_substream, cmd);
2218 be->dpcm[stream].be_start++;
2222 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2224 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2225 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2228 fe->dpcm[stream].fe_pause = true;
2229 be->dpcm[stream].be_pause++;
2231 be->dpcm[stream].be_start--;
2232 if (be->dpcm[stream].be_start != 0)
2235 ret = soc_pcm_trigger(be_substream, cmd);
2237 be->dpcm[stream].be_start++;
2241 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2245 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2249 return soc_pcm_ret(fe, ret);
2251 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2253 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2254 int cmd, bool fe_first)
2256 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2259 /* call trigger on the frontend before the backend. */
2261 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2262 fe->dai_link->name, cmd);
2264 ret = soc_pcm_trigger(substream, cmd);
2268 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2272 /* call trigger on the frontend after the backend. */
2273 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2277 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2278 fe->dai_link->name, cmd);
2280 ret = soc_pcm_trigger(substream, cmd);
2285 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2287 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2288 int stream = substream->stream;
2290 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2292 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2295 case SND_SOC_DPCM_TRIGGER_PRE:
2297 case SNDRV_PCM_TRIGGER_START:
2298 case SNDRV_PCM_TRIGGER_RESUME:
2299 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2300 case SNDRV_PCM_TRIGGER_DRAIN:
2301 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2303 case SNDRV_PCM_TRIGGER_STOP:
2304 case SNDRV_PCM_TRIGGER_SUSPEND:
2305 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2306 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2313 case SND_SOC_DPCM_TRIGGER_POST:
2315 case SNDRV_PCM_TRIGGER_START:
2316 case SNDRV_PCM_TRIGGER_RESUME:
2317 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2318 case SNDRV_PCM_TRIGGER_DRAIN:
2319 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2321 case SNDRV_PCM_TRIGGER_STOP:
2322 case SNDRV_PCM_TRIGGER_SUSPEND:
2323 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2324 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2331 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2332 /* bespoke trigger() - handles both FE and BEs */
2334 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2335 fe->dai_link->name, cmd);
2337 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2340 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2341 fe->dai_link->name);
2347 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2353 case SNDRV_PCM_TRIGGER_START:
2354 case SNDRV_PCM_TRIGGER_RESUME:
2355 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2356 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2358 case SNDRV_PCM_TRIGGER_STOP:
2359 case SNDRV_PCM_TRIGGER_SUSPEND:
2360 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2362 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2363 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2368 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2372 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2374 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2375 int stream = substream->stream;
2377 /* if FE's runtime_update is already set, we're in race;
2378 * process this trigger later at exit
2380 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2381 fe->dpcm[stream].trigger_pending = cmd + 1;
2382 return 0; /* delayed, assuming it's successful */
2385 /* we're alone, let's trigger */
2386 return dpcm_fe_dai_do_trigger(substream, cmd);
2389 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2391 struct snd_soc_dpcm *dpcm;
2394 for_each_dpcm_be(fe, stream, dpcm) {
2396 struct snd_soc_pcm_runtime *be = dpcm->be;
2397 struct snd_pcm_substream *be_substream =
2398 snd_soc_dpcm_get_substream(be, stream);
2400 /* is this op for this BE ? */
2401 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2404 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2405 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2406 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2407 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2410 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2411 be->dai_link->name);
2413 ret = __soc_pcm_prepare(be, be_substream);
2417 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2420 return soc_pcm_ret(fe, ret);
2423 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2425 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2426 int stream = substream->stream, ret = 0;
2428 snd_soc_dpcm_mutex_lock(fe);
2430 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2432 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2434 /* there is no point preparing this FE if there are no BEs */
2435 if (list_empty(&fe->dpcm[stream].be_clients)) {
2436 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2437 fe->dai_link->name);
2442 ret = dpcm_be_dai_prepare(fe, stream);
2446 /* call prepare on the frontend */
2447 ret = __soc_pcm_prepare(fe, substream);
2451 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2454 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2455 snd_soc_dpcm_mutex_unlock(fe);
2457 return soc_pcm_ret(fe, ret);
2460 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2462 struct snd_pcm_substream *substream =
2463 snd_soc_dpcm_get_substream(fe, stream);
2464 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2467 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2468 stream ? "capture" : "playback", fe->dai_link->name);
2470 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2471 /* call bespoke trigger - FE takes care of all BE triggers */
2472 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2473 fe->dai_link->name);
2475 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2477 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2478 fe->dai_link->name);
2480 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2483 dpcm_be_dai_hw_free(fe, stream);
2485 dpcm_be_dai_shutdown(fe, stream);
2487 /* run the stream event for each BE */
2488 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2490 return soc_pcm_ret(fe, err);
2493 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2495 struct snd_pcm_substream *substream =
2496 snd_soc_dpcm_get_substream(fe, stream);
2497 struct snd_soc_dpcm *dpcm;
2498 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2501 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2502 stream ? "capture" : "playback", fe->dai_link->name);
2504 /* Only start the BE if the FE is ready */
2505 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2506 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2507 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2508 fe->dai_link->name, fe->dpcm[stream].state);
2513 /* startup must always be called for new BEs */
2514 ret = dpcm_be_dai_startup(fe, stream);
2518 /* keep going if FE state is > open */
2519 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2522 ret = dpcm_be_dai_hw_params(fe, stream);
2526 /* keep going if FE state is > hw_params */
2527 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2530 ret = dpcm_be_dai_prepare(fe, stream);
2534 /* run the stream event for each BE */
2535 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2537 /* keep going if FE state is > prepare */
2538 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2539 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2542 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2543 /* call trigger on the frontend - FE takes care of all BE triggers */
2544 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2545 fe->dai_link->name);
2547 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2551 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2552 fe->dai_link->name);
2554 ret = dpcm_be_dai_trigger(fe, stream,
2555 SNDRV_PCM_TRIGGER_START);
2563 dpcm_be_dai_hw_free(fe, stream);
2565 dpcm_be_dai_shutdown(fe, stream);
2567 /* disconnect any pending BEs */
2568 for_each_dpcm_be(fe, stream, dpcm) {
2569 struct snd_soc_pcm_runtime *be = dpcm->be;
2571 /* is this op for this BE ? */
2572 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2575 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2576 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2577 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2580 return soc_pcm_ret(fe, ret);
2583 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2585 struct snd_soc_dapm_widget_list *list;
2589 if (!fe->dai_link->dynamic)
2592 if (fe->dai_link->num_cpus > 1) {
2594 "%s doesn't support Multi CPU yet\n", __func__);
2598 /* only check active links */
2599 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2602 /* DAPM sync will call this to update DSP paths */
2603 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2604 new ? "new" : "old", fe->dai_link->name);
2606 for_each_pcm_streams(stream) {
2608 /* skip if FE doesn't have playback/capture capability */
2609 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2610 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2613 /* skip if FE isn't currently playing/capturing */
2614 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2615 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2618 paths = dpcm_path_get(fe, stream, &list);
2622 /* update any playback/capture paths */
2623 count = dpcm_process_paths(fe, stream, &list, new);
2625 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2627 dpcm_run_update_startup(fe, stream);
2629 dpcm_run_update_shutdown(fe, stream);
2630 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2632 dpcm_clear_pending_state(fe, stream);
2633 dpcm_be_disconnect(fe, stream);
2636 dpcm_path_put(&list);
2642 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2645 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2647 struct snd_soc_pcm_runtime *fe;
2650 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
2651 /* shutdown all old paths first */
2652 for_each_card_rtds(card, fe) {
2653 ret = soc_dpcm_fe_runtime_update(fe, 0);
2658 /* bring new paths up */
2659 for_each_card_rtds(card, fe) {
2660 ret = soc_dpcm_fe_runtime_update(fe, 1);
2666 mutex_unlock(&card->pcm_mutex);
2669 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2671 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2673 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2674 struct snd_soc_dpcm *dpcm;
2675 int stream = fe_substream->stream;
2677 snd_soc_dpcm_mutex_assert_held(fe);
2679 /* mark FE's links ready to prune */
2680 for_each_dpcm_be(fe, stream, dpcm)
2681 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2683 dpcm_be_disconnect(fe, stream);
2685 fe->dpcm[stream].runtime = NULL;
2688 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2690 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2693 snd_soc_dpcm_mutex_lock(fe);
2694 ret = dpcm_fe_dai_shutdown(fe_substream);
2696 dpcm_fe_dai_cleanup(fe_substream);
2698 snd_soc_dpcm_mutex_unlock(fe);
2702 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2704 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2705 struct snd_soc_dapm_widget_list *list;
2707 int stream = fe_substream->stream;
2709 snd_soc_dpcm_mutex_lock(fe);
2710 fe->dpcm[stream].runtime = fe_substream->runtime;
2712 ret = dpcm_path_get(fe, stream, &list);
2716 /* calculate valid and active FE <-> BE dpcms */
2717 dpcm_process_paths(fe, stream, &list, 1);
2719 ret = dpcm_fe_dai_startup(fe_substream);
2721 dpcm_fe_dai_cleanup(fe_substream);
2723 dpcm_clear_pending_state(fe, stream);
2724 dpcm_path_put(&list);
2726 snd_soc_dpcm_mutex_unlock(fe);
2730 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2731 int *playback, int *capture)
2733 struct snd_soc_dai *cpu_dai;
2736 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) {
2738 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2742 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2745 if (rtd->dai_link->dpcm_playback) {
2746 stream = SNDRV_PCM_STREAM_PLAYBACK;
2748 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2749 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2755 dev_err(rtd->card->dev,
2756 "No CPU DAIs support playback for stream %s\n",
2757 rtd->dai_link->stream_name);
2761 if (rtd->dai_link->dpcm_capture) {
2762 stream = SNDRV_PCM_STREAM_CAPTURE;
2764 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2765 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2772 dev_err(rtd->card->dev,
2773 "No CPU DAIs support capture for stream %s\n",
2774 rtd->dai_link->stream_name);
2779 struct snd_soc_dai *codec_dai;
2781 /* Adapt stream for codec2codec links */
2782 int cpu_capture = rtd->dai_link->params ?
2783 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2784 int cpu_playback = rtd->dai_link->params ?
2785 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2787 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2788 if (rtd->dai_link->num_cpus == 1) {
2789 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2790 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) {
2791 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2793 dev_err(rtd->card->dev,
2794 "N cpus to M codecs link is not supported yet\n");
2798 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2799 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2801 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2802 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2807 if (rtd->dai_link->playback_only) {
2812 if (rtd->dai_link->capture_only) {
2820 static int soc_create_pcm(struct snd_pcm **pcm,
2821 struct snd_soc_pcm_runtime *rtd,
2822 int playback, int capture, int num)
2827 /* create the PCM */
2828 if (rtd->dai_link->params) {
2829 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2830 rtd->dai_link->stream_name);
2832 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2833 playback, capture, pcm);
2834 } else if (rtd->dai_link->no_pcm) {
2835 snprintf(new_name, sizeof(new_name), "(%s)",
2836 rtd->dai_link->stream_name);
2838 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2839 playback, capture, pcm);
2841 if (rtd->dai_link->dynamic)
2842 snprintf(new_name, sizeof(new_name), "%s (*)",
2843 rtd->dai_link->stream_name);
2845 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2846 rtd->dai_link->stream_name,
2847 soc_codec_dai_name(rtd), num);
2849 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2853 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2854 new_name, rtd->dai_link->name, ret);
2857 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2862 /* create a new pcm */
2863 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2865 struct snd_soc_component *component;
2866 struct snd_pcm *pcm;
2867 int ret = 0, playback = 0, capture = 0;
2870 ret = soc_get_playback_capture(rtd, &playback, &capture);
2874 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2878 /* DAPM dai link stream work */
2880 * Currently nothing to do for c2c links
2881 * Since c2c links are internal nodes in the DAPM graph and
2882 * don't interface with the outside world or application layer
2883 * we don't have to do any special handling on close.
2885 if (!rtd->dai_link->params)
2886 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2889 pcm->nonatomic = rtd->dai_link->nonatomic;
2890 pcm->private_data = rtd;
2891 pcm->no_device_suspend = true;
2893 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2895 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2897 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2901 /* ASoC PCM operations */
2902 if (rtd->dai_link->dynamic) {
2903 rtd->ops.open = dpcm_fe_dai_open;
2904 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2905 rtd->ops.prepare = dpcm_fe_dai_prepare;
2906 rtd->ops.trigger = dpcm_fe_dai_trigger;
2907 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2908 rtd->ops.close = dpcm_fe_dai_close;
2909 rtd->ops.pointer = soc_pcm_pointer;
2911 rtd->ops.open = soc_pcm_open;
2912 rtd->ops.hw_params = soc_pcm_hw_params;
2913 rtd->ops.prepare = soc_pcm_prepare;
2914 rtd->ops.trigger = soc_pcm_trigger;
2915 rtd->ops.hw_free = soc_pcm_hw_free;
2916 rtd->ops.close = soc_pcm_close;
2917 rtd->ops.pointer = soc_pcm_pointer;
2920 for_each_rtd_components(rtd, i, component) {
2921 const struct snd_soc_component_driver *drv = component->driver;
2924 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2926 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2928 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2930 rtd->ops.page = snd_soc_pcm_component_page;
2932 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2934 rtd->ops.ack = snd_soc_pcm_component_ack;
2938 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2941 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2943 ret = snd_soc_pcm_component_new(rtd);
2947 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2948 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2952 /* is the current PCM operation for this FE ? */
2953 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2955 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2959 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2961 /* is the current PCM operation for this BE ? */
2962 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2963 struct snd_soc_pcm_runtime *be, int stream)
2965 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2966 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2967 be->dpcm[stream].runtime_update))
2971 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2973 /* get the substream for this BE */
2974 struct snd_pcm_substream *
2975 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2977 return be->pcm->streams[stream].substream;
2979 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2981 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2982 struct snd_soc_pcm_runtime *be,
2984 const enum snd_soc_dpcm_state *states,
2987 struct snd_soc_dpcm *dpcm;
2992 for_each_dpcm_fe(be, stream, dpcm) {
2997 state = dpcm->fe->dpcm[stream].state;
2998 for (i = 0; i < num_states; i++) {
2999 if (state == states[i]) {
3006 /* it's safe to do this BE DAI */
3011 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3012 * are not running, paused or suspended for the specified stream direction.
3014 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3015 struct snd_soc_pcm_runtime *be, int stream)
3017 const enum snd_soc_dpcm_state state[] = {
3018 SND_SOC_DPCM_STATE_START,
3019 SND_SOC_DPCM_STATE_PAUSED,
3020 SND_SOC_DPCM_STATE_SUSPEND,
3023 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3025 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3028 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3029 * running, paused or suspended for the specified stream direction.
3031 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3032 struct snd_soc_pcm_runtime *be, int stream)
3034 const enum snd_soc_dpcm_state state[] = {
3035 SND_SOC_DPCM_STATE_START,
3036 SND_SOC_DPCM_STATE_PAUSED,
3037 SND_SOC_DPCM_STATE_SUSPEND,
3038 SND_SOC_DPCM_STATE_PREPARE,
3041 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3043 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);