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_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
58 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
61 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
67 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
70 #define DPCM_MAX_BE_USERS 8
72 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
74 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
76 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
78 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
81 #ifdef CONFIG_DEBUG_FS
82 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
85 case SND_SOC_DPCM_STATE_NEW:
87 case SND_SOC_DPCM_STATE_OPEN:
89 case SND_SOC_DPCM_STATE_HW_PARAMS:
91 case SND_SOC_DPCM_STATE_PREPARE:
93 case SND_SOC_DPCM_STATE_START:
95 case SND_SOC_DPCM_STATE_STOP:
97 case SND_SOC_DPCM_STATE_SUSPEND:
99 case SND_SOC_DPCM_STATE_PAUSED:
101 case SND_SOC_DPCM_STATE_HW_FREE:
103 case SND_SOC_DPCM_STATE_CLOSE:
110 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
111 int stream, char *buf, size_t size)
113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
114 struct snd_soc_dpcm *dpcm;
118 offset += scnprintf(buf + offset, size - offset,
119 "[%s - %s]\n", fe->dai_link->name,
120 stream ? "Capture" : "Playback");
122 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
123 dpcm_state_string(fe->dpcm[stream].state));
125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
127 offset += scnprintf(buf + offset, size - offset,
129 "Format = %s, Channels = %d, Rate = %d\n",
130 snd_pcm_format_name(params_format(params)),
131 params_channels(params),
132 params_rate(params));
135 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
137 if (list_empty(&fe->dpcm[stream].be_clients)) {
138 offset += scnprintf(buf + offset, size - offset,
139 " No active DSP links\n");
143 for_each_dpcm_be(fe, stream, dpcm) {
144 struct snd_soc_pcm_runtime *be = dpcm->be;
145 params = &be->dpcm[stream].hw_params;
147 offset += scnprintf(buf + offset, size - offset,
148 "- %s\n", be->dai_link->name);
150 offset += scnprintf(buf + offset, size - offset,
152 dpcm_state_string(be->dpcm[stream].state));
154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
156 offset += scnprintf(buf + offset, size - offset,
158 "Format = %s, Channels = %d, Rate = %d\n",
159 snd_pcm_format_name(params_format(params)),
160 params_channels(params),
161 params_rate(params));
167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
168 size_t count, loff_t *ppos)
170 struct snd_soc_pcm_runtime *fe = file->private_data;
171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
175 if (fe->dai_link->num_cpus > 1) {
177 "%s doesn't support Multi CPU yet\n", __func__);
181 buf = kmalloc(out_count, GFP_KERNEL);
185 snd_soc_dpcm_mutex_lock(fe);
186 for_each_pcm_streams(stream)
187 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
188 offset += dpcm_show_state(fe, stream,
191 snd_soc_dpcm_mutex_unlock(fe);
193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
199 static const struct file_operations dpcm_state_fops = {
201 .read = dpcm_state_read_file,
202 .llseek = default_llseek,
205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
207 if (!rtd->dai_link->dynamic)
210 if (!rtd->card->debugfs_card_root)
213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
214 rtd->card->debugfs_card_root);
216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
217 rtd, &dpcm_state_fops);
220 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
225 stream ? "capture" : "playback");
227 dpcm->debugfs_state = debugfs_create_dir(
228 name, dpcm->fe->debugfs_dpcm_root);
229 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
235 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
237 debugfs_remove_recursive(dpcm->debugfs_state);
241 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
246 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
251 /* Set FE's runtime_update state; the state is protected via PCM stream lock
252 * for avoiding the race with trigger callback.
253 * If the state is unset and a trigger is pending while the previous operation,
254 * process the pending trigger action here.
256 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
257 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
258 int stream, enum snd_soc_dpcm_update state)
260 struct snd_pcm_substream *substream =
261 snd_soc_dpcm_get_substream(fe, stream);
263 snd_soc_dpcm_stream_lock_irq(fe, stream);
264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
265 dpcm_fe_dai_do_trigger(substream,
266 fe->dpcm[stream].trigger_pending - 1);
267 fe->dpcm[stream].trigger_pending = 0;
269 fe->dpcm[stream].runtime_update = state;
270 snd_soc_dpcm_stream_unlock_irq(fe, stream);
273 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
274 int stream, enum snd_soc_dpcm_update state)
276 be->dpcm[stream].runtime_update = state;
280 * snd_soc_runtime_action() - Increment/Decrement active count for
281 * PCM runtime components
282 * @rtd: ASoC PCM runtime that is activated
283 * @stream: Direction of the PCM stream
284 * @action: Activate stream if 1. Deactivate if -1.
286 * Increments/Decrements the active count for all the DAIs and components
287 * attached to a PCM runtime.
288 * Should typically be called when a stream is opened.
290 * Must be called with the rtd->card->pcm_mutex being held
292 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
293 int stream, int action)
295 struct snd_soc_dai *dai;
298 snd_soc_dpcm_mutex_assert_held(rtd);
300 for_each_rtd_dais(rtd, i, dai)
301 snd_soc_dai_action(dai, stream, action);
303 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
306 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
307 * @rtd: The ASoC PCM runtime that should be checked.
309 * This function checks whether the power down delay should be ignored for a
310 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
311 * been configured to ignore the delay, or if none of the components benefits
312 * from having the delay.
314 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
316 struct snd_soc_component *component;
320 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
323 for_each_rtd_components(rtd, i, component)
324 ignore &= !component->driver->use_pmdown_time;
330 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
331 * @substream: the pcm substream
332 * @hw: the hardware parameters
334 * Sets the substream runtime hardware parameters.
336 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
337 const struct snd_pcm_hardware *hw)
339 substream->runtime->hw = *hw;
343 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
345 /* DPCM stream event, send event to FE and all active BEs. */
346 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
349 struct snd_soc_dpcm *dpcm;
351 snd_soc_dpcm_mutex_assert_held(fe);
353 for_each_dpcm_be(fe, dir, dpcm) {
355 struct snd_soc_pcm_runtime *be = dpcm->be;
357 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
358 be->dai_link->name, event, dir);
360 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
361 (be->dpcm[dir].users >= 1))
364 snd_soc_dapm_stream_event(be, dir, event);
367 snd_soc_dapm_stream_event(fe, dir, event);
372 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
373 struct snd_pcm_hw_params *params)
376 dai->rate = params_rate(params);
377 dai->channels = params_channels(params);
378 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
382 dai->sample_bits = 0;
386 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
387 struct snd_soc_dai *soc_dai)
389 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
392 if (!snd_soc_dai_active(soc_dai))
395 #define __soc_pcm_apply_symmetry(name, NAME) \
396 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
397 rtd->dai_link->symmetric_##name)) { \
398 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
399 #name, soc_dai->name); \
401 ret = snd_pcm_hw_constraint_single(substream->runtime, \
402 SNDRV_PCM_HW_PARAM_##NAME,\
405 dev_err(soc_dai->dev, \
406 "ASoC: Unable to apply %s constraint: %d\n",\
412 __soc_pcm_apply_symmetry(rate, RATE);
413 __soc_pcm_apply_symmetry(channels, CHANNELS);
414 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
419 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
420 struct snd_pcm_hw_params *params)
422 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
423 struct snd_soc_dai d;
424 struct snd_soc_dai *dai;
425 struct snd_soc_dai *cpu_dai;
426 unsigned int symmetry, i;
429 soc_pcm_set_dai_params(&d, params);
431 #define __soc_pcm_params_symmetry(xxx) \
432 symmetry = rtd->dai_link->symmetric_##xxx; \
433 for_each_rtd_dais(rtd, i, dai) \
434 symmetry |= dai->driver->symmetric_##xxx; \
437 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
438 if (!snd_soc_dai_is_dummy(cpu_dai) && \
439 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
440 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
441 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
445 /* reject unmatched parameters when applying symmetry */
446 __soc_pcm_params_symmetry(rate);
447 __soc_pcm_params_symmetry(channels);
448 __soc_pcm_params_symmetry(sample_bits);
453 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
455 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
456 struct snd_soc_dai_link *link = rtd->dai_link;
457 struct snd_soc_dai *dai;
458 unsigned int symmetry, i;
460 symmetry = link->symmetric_rate ||
461 link->symmetric_channels ||
462 link->symmetric_sample_bits;
464 for_each_rtd_dais(rtd, i, dai)
465 symmetry = symmetry ||
466 dai->driver->symmetric_rate ||
467 dai->driver->symmetric_channels ||
468 dai->driver->symmetric_sample_bits;
471 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
474 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
476 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
482 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
484 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
488 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
490 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
491 struct snd_soc_dai *cpu_dai;
492 struct snd_soc_dai *codec_dai;
493 int stream = substream->stream;
495 unsigned int bits = 0, cpu_bits = 0;
497 for_each_rtd_codec_dais(rtd, i, codec_dai) {
498 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
500 if (pcm_codec->sig_bits == 0) {
504 bits = max(pcm_codec->sig_bits, bits);
507 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
508 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
510 if (pcm_cpu->sig_bits == 0) {
514 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
517 soc_pcm_set_msb(substream, bits);
518 soc_pcm_set_msb(substream, cpu_bits);
521 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
523 hw->rates = UINT_MAX;
525 hw->rate_max = UINT_MAX;
526 hw->channels_min = 0;
527 hw->channels_max = UINT_MAX;
528 hw->formats = ULLONG_MAX;
531 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
532 struct snd_soc_pcm_stream *p)
534 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
536 /* setup hw->rate_min/max via hw->rates first */
537 snd_pcm_hw_limit_rates(hw);
539 /* update hw->rate_min/max by snd_soc_pcm_stream */
540 hw->rate_min = max(hw->rate_min, p->rate_min);
541 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
544 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
545 struct snd_soc_pcm_stream *p)
547 hw->channels_min = max(hw->channels_min, p->channels_min);
548 hw->channels_max = min(hw->channels_max, p->channels_max);
551 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
552 struct snd_soc_pcm_stream *p)
554 hw->formats &= p->formats;
558 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
559 * @rtd: ASoC PCM runtime
560 * @hw: PCM hardware parameters (output)
561 * @stream: Direction of the PCM stream
563 * Calculates the subset of stream parameters supported by all DAIs
564 * associated with the PCM stream.
566 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
567 struct snd_pcm_hardware *hw, int stream)
569 struct snd_soc_dai *codec_dai;
570 struct snd_soc_dai *cpu_dai;
571 struct snd_soc_pcm_stream *codec_stream;
572 struct snd_soc_pcm_stream *cpu_stream;
573 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
578 /* first calculate min/max only for CPUs in the DAI link */
579 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
582 * Skip CPUs which don't support the current stream type.
583 * Otherwise, since the rate, channel, and format values will
584 * zero in that case, we would have no usable settings left,
585 * causing the resulting setup to fail.
587 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
590 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
592 soc_pcm_hw_update_chan(hw, cpu_stream);
593 soc_pcm_hw_update_rate(hw, cpu_stream);
594 soc_pcm_hw_update_format(hw, cpu_stream);
596 cpu_chan_min = hw->channels_min;
597 cpu_chan_max = hw->channels_max;
599 /* second calculate min/max only for CODECs in the DAI link */
600 for_each_rtd_codec_dais(rtd, i, codec_dai) {
603 * Skip CODECs which don't support the current stream type.
604 * Otherwise, since the rate, channel, and format values will
605 * zero in that case, we would have no usable settings left,
606 * causing the resulting setup to fail.
608 if (!snd_soc_dai_stream_valid(codec_dai, stream))
611 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
613 soc_pcm_hw_update_chan(hw, codec_stream);
614 soc_pcm_hw_update_rate(hw, codec_stream);
615 soc_pcm_hw_update_format(hw, codec_stream);
618 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
619 if (!hw->channels_min)
623 * chan min/max cannot be enforced if there are multiple CODEC DAIs
624 * connected to CPU DAI(s), use CPU DAI's directly and let
625 * channel allocation be fixed up later
627 if (rtd->dai_link->num_codecs > 1) {
628 hw->channels_min = cpu_chan_min;
629 hw->channels_max = cpu_chan_max;
634 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
636 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
638 struct snd_pcm_hardware *hw = &substream->runtime->hw;
639 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
640 u64 formats = hw->formats;
643 * At least one CPU and one CODEC should match. Otherwise, we should
644 * have bailed out on a higher level, since there would be no CPU or
645 * CODEC to support the transfer direction in that case.
647 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
650 hw->formats &= formats;
653 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
655 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
656 struct snd_soc_component *component;
659 for_each_rtd_components(rtd, i, component) {
660 ret = snd_soc_component_module_get_when_open(component, substream);
664 ret = snd_soc_component_open(component, substream);
672 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
675 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
676 struct snd_soc_component *component;
679 for_each_rtd_components(rtd, i, component) {
680 int r = snd_soc_component_close(component, substream, rollback);
682 ret = r; /* use last ret */
684 snd_soc_component_module_put_when_close(component, substream, rollback);
690 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
691 struct snd_pcm_substream *substream, int rollback)
693 struct snd_soc_component *component;
694 struct snd_soc_dai *dai;
697 snd_soc_dpcm_mutex_assert_held(rtd);
700 snd_soc_runtime_deactivate(rtd, substream->stream);
701 /* clear the corresponding DAIs parameters when going to be inactive */
702 for_each_rtd_dais(rtd, i, dai) {
703 if (snd_soc_dai_active(dai) == 0)
704 soc_pcm_set_dai_params(dai, NULL);
706 if (snd_soc_dai_stream_active(dai, substream->stream) == 0)
707 snd_soc_dai_digital_mute(dai, 1, substream->stream);
711 for_each_rtd_dais(rtd, i, dai)
712 snd_soc_dai_shutdown(dai, substream, rollback);
714 snd_soc_link_shutdown(substream, rollback);
716 soc_pcm_components_close(substream, rollback);
718 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
720 for_each_rtd_components(rtd, i, component)
721 if (!snd_soc_component_active(component))
722 pinctrl_pm_select_sleep_state(component->dev);
728 * Called by ALSA when a PCM substream is closed. Private data can be
729 * freed here. The cpu DAI, codec DAI, machine and components are also
732 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
733 struct snd_pcm_substream *substream)
735 return soc_pcm_clean(rtd, substream, 0);
738 /* PCM close ops for non-DPCM streams */
739 static int soc_pcm_close(struct snd_pcm_substream *substream)
741 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
743 snd_soc_dpcm_mutex_lock(rtd);
744 __soc_pcm_close(rtd, substream);
745 snd_soc_dpcm_mutex_unlock(rtd);
749 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
751 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
752 struct snd_pcm_hardware *hw = &substream->runtime->hw;
753 const char *name_cpu = soc_cpu_dai_name(rtd);
754 const char *name_codec = soc_codec_dai_name(rtd);
756 struct device *dev = rtd->dev;
766 err_msg = "channels";
767 if (!hw->channels_min || !hw->channels_max ||
768 hw->channels_min > hw->channels_max)
771 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
773 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
774 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
776 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
782 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
783 name_codec, name_cpu, err_msg);
788 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
789 * then initialized and any private data can be allocated. This also calls
790 * startup for the cpu DAI, component, machine and codec DAI.
792 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
793 struct snd_pcm_substream *substream)
795 struct snd_soc_component *component;
796 struct snd_soc_dai *dai;
799 snd_soc_dpcm_mutex_assert_held(rtd);
801 for_each_rtd_components(rtd, i, component)
802 pinctrl_pm_select_default_state(component->dev);
804 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
808 ret = soc_pcm_components_open(substream);
812 ret = snd_soc_link_startup(substream);
816 /* startup the audio subsystem */
817 for_each_rtd_dais(rtd, i, dai) {
818 ret = snd_soc_dai_startup(dai, substream);
823 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
824 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
827 /* Check that the codec and cpu DAIs are compatible */
828 soc_pcm_init_runtime_hw(substream);
830 soc_pcm_update_symmetry(substream);
832 ret = soc_hw_sanity_check(substream);
836 soc_pcm_apply_msb(substream);
838 /* Symmetry only applies if we've already got an active stream. */
839 for_each_rtd_dais(rtd, i, dai) {
840 ret = soc_pcm_apply_symmetry(substream, dai);
845 snd_soc_runtime_activate(rtd, substream->stream);
849 soc_pcm_clean(rtd, substream, 1);
851 return soc_pcm_ret(rtd, ret);
854 /* PCM open ops for non-DPCM streams */
855 static int soc_pcm_open(struct snd_pcm_substream *substream)
857 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
860 snd_soc_dpcm_mutex_lock(rtd);
861 ret = __soc_pcm_open(rtd, substream);
862 snd_soc_dpcm_mutex_unlock(rtd);
867 * Called by ALSA when the PCM substream is prepared, can set format, sample
868 * rate, etc. This function is non atomic and can be called multiple times,
869 * it can refer to the runtime info.
871 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
872 struct snd_pcm_substream *substream)
874 struct snd_soc_dai *dai;
877 snd_soc_dpcm_mutex_assert_held(rtd);
879 ret = snd_soc_link_prepare(substream);
883 ret = snd_soc_pcm_component_prepare(substream);
887 ret = snd_soc_pcm_dai_prepare(substream);
891 /* cancel any delayed stream shutdown that is pending */
892 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
895 cancel_delayed_work(&rtd->delayed_work);
898 snd_soc_dapm_stream_event(rtd, substream->stream,
899 SND_SOC_DAPM_STREAM_START);
901 for_each_rtd_dais(rtd, i, dai)
902 snd_soc_dai_digital_mute(dai, 0, substream->stream);
905 return soc_pcm_ret(rtd, ret);
908 /* PCM prepare ops for non-DPCM streams */
909 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
911 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
914 snd_soc_dpcm_mutex_lock(rtd);
915 ret = __soc_pcm_prepare(rtd, substream);
916 snd_soc_dpcm_mutex_unlock(rtd);
920 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
923 struct snd_interval *interval;
924 int channels = hweight_long(mask);
926 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
927 interval->min = channels;
928 interval->max = channels;
931 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
932 struct snd_pcm_substream *substream, int rollback)
934 struct snd_soc_dai *dai;
937 snd_soc_dpcm_mutex_assert_held(rtd);
939 /* run the stream event */
940 snd_soc_dapm_stream_stop(rtd, substream->stream);
942 /* free any machine hw params */
943 snd_soc_link_hw_free(substream, rollback);
945 /* free any component resources */
946 snd_soc_pcm_component_hw_free(substream, rollback);
948 /* now free hw params for the DAIs */
949 for_each_rtd_dais(rtd, i, dai)
950 if (snd_soc_dai_stream_valid(dai, substream->stream))
951 snd_soc_dai_hw_free(dai, substream, rollback);
957 * Frees resources allocated by hw_params, can be called multiple times
959 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
960 struct snd_pcm_substream *substream)
962 return soc_pcm_hw_clean(rtd, substream, 0);
965 /* hw_free PCM ops for non-DPCM streams */
966 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
968 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
971 snd_soc_dpcm_mutex_lock(rtd);
972 ret = __soc_pcm_hw_free(rtd, substream);
973 snd_soc_dpcm_mutex_unlock(rtd);
978 * Called by ALSA when the hardware params are set by application. This
979 * function can also be called multiple times and can allocate buffers
980 * (using snd_pcm_lib_* ). It's non-atomic.
982 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
983 struct snd_pcm_substream *substream,
984 struct snd_pcm_hw_params *params)
986 struct snd_soc_dai *cpu_dai;
987 struct snd_soc_dai *codec_dai;
990 snd_soc_dpcm_mutex_assert_held(rtd);
992 ret = soc_pcm_params_symmetry(substream, params);
996 ret = snd_soc_link_hw_params(substream, params);
1000 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1001 struct snd_pcm_hw_params codec_params;
1002 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
1005 * Skip CODECs which don't support the current stream type,
1006 * the idea being that if a CODEC is not used for the currently
1007 * set up transfer direction, it should not need to be
1008 * configured, especially since the configuration used might
1009 * not even be supported by that CODEC. There may be cases
1010 * however where a CODEC needs to be set up although it is
1011 * actually not being used for the transfer, e.g. if a
1012 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1013 * for the DAI link including a playback-only CODEC.
1014 * If this becomes necessary, we will have to augment the
1015 * machine driver setup with information on how to act, so
1016 * we can do the right thing here.
1018 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1021 /* copy params for each codec */
1022 codec_params = *params;
1024 /* fixup params based on TDM slot masks */
1026 soc_pcm_codec_params_fixup(&codec_params, tdm_mask);
1028 ret = snd_soc_dai_hw_params(codec_dai, substream,
1033 soc_pcm_set_dai_params(codec_dai, &codec_params);
1034 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
1037 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1039 * Skip CPUs which don't support the current stream
1040 * type. See soc_pcm_init_runtime_hw() for more details
1042 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1045 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
1049 /* store the parameters for each DAI */
1050 soc_pcm_set_dai_params(cpu_dai, params);
1051 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1054 ret = snd_soc_pcm_component_hw_params(substream, params);
1057 soc_pcm_hw_clean(rtd, substream, 1);
1059 return soc_pcm_ret(rtd, ret);
1062 /* hw_params PCM ops for non-DPCM streams */
1063 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1064 struct snd_pcm_hw_params *params)
1066 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1069 snd_soc_dpcm_mutex_lock(rtd);
1070 ret = __soc_pcm_hw_params(rtd, substream, params);
1071 snd_soc_dpcm_mutex_unlock(rtd);
1075 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1077 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1078 struct snd_soc_component *component;
1079 int ret = -EINVAL, _ret = 0, start_dma_last = 0, i;
1083 case SNDRV_PCM_TRIGGER_START:
1084 case SNDRV_PCM_TRIGGER_RESUME:
1085 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1086 /* Do we need to start dma last? */
1087 for_each_rtd_components(rtd, i, component) {
1088 if (component->driver->start_dma_last) {
1094 ret = snd_soc_link_trigger(substream, cmd, 0);
1098 if (start_dma_last) {
1099 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1103 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1105 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1109 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1119 case SNDRV_PCM_TRIGGER_START:
1120 cmd = SNDRV_PCM_TRIGGER_STOP;
1122 case SNDRV_PCM_TRIGGER_RESUME:
1123 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1125 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1126 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1132 case SNDRV_PCM_TRIGGER_STOP:
1133 case SNDRV_PCM_TRIGGER_SUSPEND:
1134 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1135 if (rtd->dai_link->stop_dma_first) {
1136 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1140 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1144 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1148 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1152 ret = snd_soc_link_trigger(substream, cmd, rollback);
1163 * soc level wrapper for pointer callback
1164 * If cpu_dai, codec_dai, component driver has the delay callback, then
1165 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1167 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1169 struct snd_pcm_runtime *runtime = substream->runtime;
1170 snd_pcm_uframes_t offset = 0;
1171 snd_pcm_sframes_t codec_delay = 0;
1172 snd_pcm_sframes_t cpu_delay = 0;
1174 offset = snd_soc_pcm_component_pointer(substream);
1176 /* should be called *after* snd_soc_pcm_component_pointer() */
1177 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1178 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1180 runtime->delay = cpu_delay + codec_delay;
1185 /* connect a FE and BE */
1186 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1187 struct snd_soc_pcm_runtime *be, int stream)
1189 struct snd_pcm_substream *fe_substream;
1190 struct snd_pcm_substream *be_substream;
1191 struct snd_soc_dpcm *dpcm;
1193 snd_soc_dpcm_mutex_assert_held(fe);
1195 /* only add new dpcms */
1196 for_each_dpcm_be(fe, stream, dpcm) {
1197 if (dpcm->be == be && dpcm->fe == fe)
1201 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1202 be_substream = snd_soc_dpcm_get_substream(be, stream);
1204 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1205 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1209 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1210 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1211 be_substream->pcm->nonatomic = 1;
1214 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1220 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1221 snd_soc_dpcm_stream_lock_irq(fe, stream);
1222 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1223 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1224 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1226 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1227 stream ? "capture" : "playback", fe->dai_link->name,
1228 stream ? "<-" : "->", be->dai_link->name);
1230 dpcm_create_debugfs_state(dpcm, stream);
1235 /* reparent a BE onto another FE */
1236 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1237 struct snd_soc_pcm_runtime *be, int stream)
1239 struct snd_soc_dpcm *dpcm;
1240 struct snd_pcm_substream *fe_substream, *be_substream;
1242 /* reparent if BE is connected to other FEs */
1243 if (!be->dpcm[stream].users)
1246 be_substream = snd_soc_dpcm_get_substream(be, stream);
1250 for_each_dpcm_fe(be, stream, dpcm) {
1254 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1255 stream ? "capture" : "playback",
1256 dpcm->fe->dai_link->name,
1257 stream ? "<-" : "->", dpcm->be->dai_link->name);
1259 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1260 be_substream->runtime = fe_substream->runtime;
1265 /* disconnect a BE and FE */
1266 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1268 struct snd_soc_dpcm *dpcm, *d;
1269 LIST_HEAD(deleted_dpcms);
1271 snd_soc_dpcm_mutex_assert_held(fe);
1273 snd_soc_dpcm_stream_lock_irq(fe, stream);
1274 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1275 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1276 stream ? "capture" : "playback",
1277 dpcm->be->dai_link->name);
1279 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1282 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1283 stream ? "capture" : "playback", fe->dai_link->name,
1284 stream ? "<-" : "->", dpcm->be->dai_link->name);
1286 /* BEs still alive need new FE */
1287 dpcm_be_reparent(fe, dpcm->be, stream);
1289 list_del(&dpcm->list_be);
1290 list_move(&dpcm->list_fe, &deleted_dpcms);
1292 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1294 while (!list_empty(&deleted_dpcms)) {
1295 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1297 list_del(&dpcm->list_fe);
1298 dpcm_remove_debugfs_state(dpcm);
1303 /* get BE for DAI widget and stream */
1304 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1305 struct snd_soc_dapm_widget *widget, int stream)
1307 struct snd_soc_pcm_runtime *be;
1308 struct snd_soc_dapm_widget *w;
1309 struct snd_soc_dai *dai;
1312 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1314 for_each_card_rtds(card, be) {
1316 if (!be->dai_link->no_pcm)
1319 if (!snd_soc_dpcm_get_substream(be, stream))
1322 for_each_rtd_dais(be, i, dai) {
1323 w = snd_soc_dai_get_widget(dai, stream);
1325 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1326 w ? w->name : "(not set)");
1333 /* Widget provided is not a BE */
1337 int widget_in_list(struct snd_soc_dapm_widget_list *list,
1338 struct snd_soc_dapm_widget *widget)
1340 struct snd_soc_dapm_widget *w;
1343 for_each_dapm_widgets(list, i, w)
1349 EXPORT_SYMBOL_GPL(widget_in_list);
1351 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1353 struct snd_soc_card *card = widget->dapm->card;
1354 struct snd_soc_pcm_runtime *rtd;
1357 /* adjust dir to stream */
1358 if (dir == SND_SOC_DAPM_DIR_OUT)
1359 stream = SNDRV_PCM_STREAM_PLAYBACK;
1361 stream = SNDRV_PCM_STREAM_CAPTURE;
1363 rtd = dpcm_get_be(card, widget, stream);
1369 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1371 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1372 int stream, struct snd_soc_dapm_widget_list **list)
1374 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1377 if (fe->dai_link->num_cpus > 1) {
1379 "%s doesn't support Multi CPU yet\n", __func__);
1383 /* get number of valid DAI paths and their widgets */
1384 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1385 fe->card->component_chaining ?
1386 NULL : dpcm_end_walk_at_be);
1389 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1390 stream ? "capture" : "playback");
1391 else if (paths == 0)
1392 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1393 stream ? "capture" : "playback");
1398 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1400 snd_soc_dapm_dai_free_widgets(list);
1403 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1404 struct snd_soc_dapm_widget_list *list)
1406 struct snd_soc_dai *dai;
1409 /* is there a valid DAI widget for this BE */
1410 for_each_rtd_dais(dpcm->be, i, dai) {
1411 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1414 * The BE is pruned only if none of the dai
1415 * widgets are in the active list.
1417 if (widget && widget_in_list(list, widget))
1424 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1425 struct snd_soc_dapm_widget_list **list_)
1427 struct snd_soc_dpcm *dpcm;
1430 /* Destroy any old FE <--> BE connections */
1431 for_each_dpcm_be(fe, stream, dpcm) {
1432 if (dpcm_be_is_active(dpcm, stream, *list_))
1435 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1436 stream ? "capture" : "playback",
1437 dpcm->be->dai_link->name, fe->dai_link->name);
1438 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1439 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1443 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1447 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1448 struct snd_soc_dapm_widget_list **list_)
1450 struct snd_soc_card *card = fe->card;
1451 struct snd_soc_dapm_widget_list *list = *list_;
1452 struct snd_soc_pcm_runtime *be;
1453 struct snd_soc_dapm_widget *widget;
1454 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1455 int i, new = 0, err;
1457 /* don't connect if FE is not running */
1458 if (!fe_substream->runtime && !fe->fe_compr)
1461 /* Create any new FE <--> BE connections */
1462 for_each_dapm_widgets(list, i, widget) {
1464 switch (widget->id) {
1465 case snd_soc_dapm_dai_in:
1466 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1469 case snd_soc_dapm_dai_out:
1470 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1477 /* is there a valid BE rtd for this widget */
1478 be = dpcm_get_be(card, widget, stream);
1480 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1486 * Filter for systems with 'component_chaining' enabled.
1487 * This helps to avoid unnecessary re-configuration of an
1488 * already active BE on such systems.
1490 if (fe->card->component_chaining &&
1491 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1492 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1495 /* newly connected FE and BE */
1496 err = dpcm_be_connect(fe, be, stream);
1498 dev_err(fe->dev, "ASoC: can't connect %s\n",
1501 } else if (err == 0) /* already connected */
1505 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1509 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1514 * Find the corresponding BE DAIs that source or sink audio to this
1517 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1518 int stream, struct snd_soc_dapm_widget_list **list, int new)
1521 return dpcm_add_paths(fe, stream, list);
1523 return dpcm_prune_paths(fe, stream, list);
1526 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1528 struct snd_soc_dpcm *dpcm;
1530 for_each_dpcm_be(fe, stream, dpcm)
1531 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1534 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1535 int do_hw_free, struct snd_soc_dpcm *last)
1537 struct snd_soc_dpcm *dpcm;
1539 /* disable any enabled and non active backends */
1540 for_each_dpcm_be(fe, stream, dpcm) {
1541 struct snd_soc_pcm_runtime *be = dpcm->be;
1542 struct snd_pcm_substream *be_substream =
1543 snd_soc_dpcm_get_substream(be, stream);
1548 /* is this op for this BE ? */
1549 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1552 if (be->dpcm[stream].users == 0) {
1553 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1554 stream ? "capture" : "playback",
1555 be->dpcm[stream].state);
1559 if (--be->dpcm[stream].users != 0)
1562 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1566 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1567 __soc_pcm_hw_free(be, be_substream);
1568 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1572 __soc_pcm_close(be, be_substream);
1573 be_substream->runtime = NULL;
1574 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1578 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1580 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, 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 = fe_substream->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;
1652 u64 formats = hw->formats;
1655 soc_pcm_hw_init(hw);
1658 hw->formats &= formats;
1660 for_each_rtd_cpu_dais(fe, i, dai) {
1661 struct snd_soc_pcm_stream *cpu_stream;
1664 * Skip CPUs which don't support the current stream
1665 * type. See soc_pcm_init_runtime_hw() for more details
1667 if (!snd_soc_dai_stream_valid(dai, stream))
1670 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1672 soc_pcm_hw_update_rate(hw, cpu_stream);
1673 soc_pcm_hw_update_chan(hw, cpu_stream);
1674 soc_pcm_hw_update_format(hw, cpu_stream);
1679 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1681 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1682 struct snd_pcm_runtime *runtime = substream->runtime;
1683 struct snd_pcm_hardware *hw = &runtime->hw;
1684 struct snd_soc_dpcm *dpcm;
1685 struct snd_soc_dai *dai;
1686 int stream = substream->stream;
1688 if (!fe->dai_link->dpcm_merged_format)
1692 * It returns merged BE codec format
1693 * if FE want to use it (= dpcm_merged_format)
1696 for_each_dpcm_be(fe, stream, dpcm) {
1697 struct snd_soc_pcm_runtime *be = dpcm->be;
1698 struct snd_soc_pcm_stream *codec_stream;
1701 for_each_rtd_codec_dais(be, i, dai) {
1703 * Skip CODECs which don't support the current stream
1704 * type. See soc_pcm_init_runtime_hw() for more details
1706 if (!snd_soc_dai_stream_valid(dai, stream))
1709 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1711 soc_pcm_hw_update_format(hw, codec_stream);
1716 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1718 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1719 struct snd_pcm_runtime *runtime = substream->runtime;
1720 struct snd_pcm_hardware *hw = &runtime->hw;
1721 struct snd_soc_dpcm *dpcm;
1722 int stream = substream->stream;
1724 if (!fe->dai_link->dpcm_merged_chan)
1728 * It returns merged BE codec channel;
1729 * if FE want to use it (= dpcm_merged_chan)
1732 for_each_dpcm_be(fe, stream, dpcm) {
1733 struct snd_soc_pcm_runtime *be = dpcm->be;
1734 struct snd_soc_pcm_stream *cpu_stream;
1735 struct snd_soc_dai *dai;
1738 for_each_rtd_cpu_dais(be, i, dai) {
1740 * Skip CPUs which don't support the current stream
1741 * type. See soc_pcm_init_runtime_hw() for more details
1743 if (!snd_soc_dai_stream_valid(dai, stream))
1746 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1748 soc_pcm_hw_update_chan(hw, cpu_stream);
1752 * chan min/max cannot be enforced if there are multiple CODEC
1753 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1755 if (be->dai_link->num_codecs == 1) {
1756 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1757 asoc_rtd_to_codec(be, 0), stream);
1759 soc_pcm_hw_update_chan(hw, codec_stream);
1764 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1766 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1767 struct snd_pcm_runtime *runtime = substream->runtime;
1768 struct snd_pcm_hardware *hw = &runtime->hw;
1769 struct snd_soc_dpcm *dpcm;
1770 int stream = substream->stream;
1772 if (!fe->dai_link->dpcm_merged_rate)
1776 * It returns merged BE codec channel;
1777 * if FE want to use it (= dpcm_merged_chan)
1780 for_each_dpcm_be(fe, stream, dpcm) {
1781 struct snd_soc_pcm_runtime *be = dpcm->be;
1782 struct snd_soc_pcm_stream *pcm;
1783 struct snd_soc_dai *dai;
1786 for_each_rtd_dais(be, i, dai) {
1788 * Skip DAIs which don't support the current stream
1789 * type. See soc_pcm_init_runtime_hw() for more details
1791 if (!snd_soc_dai_stream_valid(dai, stream))
1794 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1796 soc_pcm_hw_update_rate(hw, pcm);
1801 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1804 struct snd_soc_dpcm *dpcm;
1805 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1806 struct snd_soc_dai *fe_cpu_dai;
1810 /* apply symmetry for FE */
1811 soc_pcm_update_symmetry(fe_substream);
1813 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1814 /* Symmetry only applies if we've got an active stream. */
1815 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1820 /* apply symmetry for BE */
1821 for_each_dpcm_be(fe, stream, dpcm) {
1822 struct snd_soc_pcm_runtime *be = dpcm->be;
1823 struct snd_pcm_substream *be_substream =
1824 snd_soc_dpcm_get_substream(be, stream);
1825 struct snd_soc_pcm_runtime *rtd;
1826 struct snd_soc_dai *dai;
1828 /* A backend may not have the requested substream */
1832 rtd = asoc_substream_to_rtd(be_substream);
1833 if (rtd->dai_link->be_hw_params_fixup)
1836 soc_pcm_update_symmetry(be_substream);
1838 /* Symmetry only applies if we've got an active stream. */
1839 for_each_rtd_dais(rtd, i, dai) {
1840 err = soc_pcm_apply_symmetry(fe_substream, dai);
1846 return soc_pcm_ret(fe, err);
1849 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1851 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1852 int stream = fe_substream->stream, ret = 0;
1854 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1856 ret = dpcm_be_dai_startup(fe, stream);
1860 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1862 /* start the DAI frontend */
1863 ret = __soc_pcm_open(fe, fe_substream);
1867 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1869 dpcm_runtime_setup_fe(fe_substream);
1871 dpcm_runtime_setup_be_format(fe_substream);
1872 dpcm_runtime_setup_be_chan(fe_substream);
1873 dpcm_runtime_setup_be_rate(fe_substream);
1875 ret = dpcm_apply_symmetry(fe_substream, stream);
1879 dpcm_be_dai_startup_unwind(fe, stream);
1881 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1883 return soc_pcm_ret(fe, ret);
1886 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1888 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1889 int stream = substream->stream;
1891 snd_soc_dpcm_mutex_assert_held(fe);
1893 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1895 /* shutdown the BEs */
1896 dpcm_be_dai_shutdown(fe, stream);
1898 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1900 /* now shutdown the frontend */
1901 __soc_pcm_close(fe, substream);
1903 /* run the stream stop event */
1904 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1906 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1907 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1911 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1913 struct snd_soc_dpcm *dpcm;
1915 /* only hw_params backends that are either sinks or sources
1916 * to this frontend DAI */
1917 for_each_dpcm_be(fe, stream, dpcm) {
1919 struct snd_soc_pcm_runtime *be = dpcm->be;
1920 struct snd_pcm_substream *be_substream =
1921 snd_soc_dpcm_get_substream(be, stream);
1923 /* is this op for this BE ? */
1924 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1927 /* only free hw when no longer used - check all FEs */
1928 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1931 /* do not free hw if this BE is used by other FE */
1932 if (be->dpcm[stream].users > 1)
1935 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1938 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1939 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1940 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1943 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1944 be->dai_link->name);
1946 __soc_pcm_hw_free(be, be_substream);
1948 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1952 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1954 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1955 int stream = substream->stream;
1957 snd_soc_dpcm_mutex_lock(fe);
1958 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1960 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1962 /* call hw_free on the frontend */
1963 soc_pcm_hw_clean(fe, substream, 0);
1965 /* only hw_params backends that are either sinks or sources
1966 * to this frontend DAI */
1967 dpcm_be_dai_hw_free(fe, stream);
1969 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1970 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1972 snd_soc_dpcm_mutex_unlock(fe);
1976 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1978 struct snd_soc_pcm_runtime *be;
1979 struct snd_pcm_substream *be_substream;
1980 struct snd_soc_dpcm *dpcm;
1983 for_each_dpcm_be(fe, stream, dpcm) {
1984 struct snd_pcm_hw_params hw_params;
1987 be_substream = snd_soc_dpcm_get_substream(be, stream);
1989 /* is this op for this BE ? */
1990 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1993 /* copy params for each dpcm */
1994 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
1995 sizeof(struct snd_pcm_hw_params));
1997 /* perform any hw_params fixups */
1998 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2002 /* copy the fixed-up hw params for BE dai */
2003 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2004 sizeof(struct snd_pcm_hw_params));
2006 /* only allow hw_params() if no connected FEs are running */
2007 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2010 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2012 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2015 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2016 be->dai_link->name);
2018 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2022 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2027 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2028 __func__, be->dai_link->name, ret);
2030 /* disable any enabled and non active backends */
2031 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2033 be_substream = snd_soc_dpcm_get_substream(be, stream);
2035 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2038 /* only allow hw_free() if no connected FEs are running */
2039 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2048 __soc_pcm_hw_free(be, be_substream);
2054 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2055 struct snd_pcm_hw_params *params)
2057 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2058 int ret, stream = substream->stream;
2060 snd_soc_dpcm_mutex_lock(fe);
2061 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2063 memcpy(&fe->dpcm[stream].hw_params, params,
2064 sizeof(struct snd_pcm_hw_params));
2065 ret = dpcm_be_dai_hw_params(fe, stream);
2069 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2070 fe->dai_link->name, params_rate(params),
2071 params_channels(params), params_format(params));
2073 /* call hw_params on the frontend */
2074 ret = __soc_pcm_hw_params(fe, substream, params);
2076 dpcm_be_dai_hw_free(fe, stream);
2078 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2081 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2082 snd_soc_dpcm_mutex_unlock(fe);
2084 return soc_pcm_ret(fe, ret);
2087 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2090 struct snd_soc_pcm_runtime *be;
2091 bool pause_stop_transition;
2092 struct snd_soc_dpcm *dpcm;
2093 unsigned long flags;
2096 for_each_dpcm_be(fe, stream, dpcm) {
2097 struct snd_pcm_substream *be_substream;
2100 be_substream = snd_soc_dpcm_get_substream(be, stream);
2102 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2104 /* is this op for this BE ? */
2105 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2108 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2109 be->dai_link->name, cmd);
2112 case SNDRV_PCM_TRIGGER_START:
2113 if (!be->dpcm[stream].be_start &&
2114 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2115 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2116 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2119 be->dpcm[stream].be_start++;
2120 if (be->dpcm[stream].be_start != 1)
2123 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2124 ret = soc_pcm_trigger(be_substream,
2125 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2127 ret = soc_pcm_trigger(be_substream,
2128 SNDRV_PCM_TRIGGER_START);
2130 be->dpcm[stream].be_start--;
2134 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2136 case SNDRV_PCM_TRIGGER_RESUME:
2137 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2140 be->dpcm[stream].be_start++;
2141 if (be->dpcm[stream].be_start != 1)
2144 ret = soc_pcm_trigger(be_substream, cmd);
2146 be->dpcm[stream].be_start--;
2150 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2152 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2153 if (!be->dpcm[stream].be_start &&
2154 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2158 fe->dpcm[stream].fe_pause = false;
2159 be->dpcm[stream].be_pause--;
2161 be->dpcm[stream].be_start++;
2162 if (be->dpcm[stream].be_start != 1)
2165 ret = soc_pcm_trigger(be_substream, cmd);
2167 be->dpcm[stream].be_start--;
2171 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2173 case SNDRV_PCM_TRIGGER_STOP:
2174 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2175 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2178 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2179 be->dpcm[stream].be_start--;
2181 if (be->dpcm[stream].be_start != 0)
2184 pause_stop_transition = false;
2185 if (fe->dpcm[stream].fe_pause) {
2186 pause_stop_transition = true;
2187 fe->dpcm[stream].fe_pause = false;
2188 be->dpcm[stream].be_pause--;
2191 if (be->dpcm[stream].be_pause != 0)
2192 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2194 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2197 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2198 be->dpcm[stream].be_start++;
2199 if (pause_stop_transition) {
2200 fe->dpcm[stream].fe_pause = true;
2201 be->dpcm[stream].be_pause++;
2206 if (be->dpcm[stream].be_pause != 0)
2207 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2209 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2212 case SNDRV_PCM_TRIGGER_SUSPEND:
2213 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2216 be->dpcm[stream].be_start--;
2217 if (be->dpcm[stream].be_start != 0)
2220 ret = soc_pcm_trigger(be_substream, cmd);
2222 be->dpcm[stream].be_start++;
2226 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2228 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2229 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2232 fe->dpcm[stream].fe_pause = true;
2233 be->dpcm[stream].be_pause++;
2235 be->dpcm[stream].be_start--;
2236 if (be->dpcm[stream].be_start != 0)
2239 ret = soc_pcm_trigger(be_substream, cmd);
2241 be->dpcm[stream].be_start++;
2245 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2249 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2253 return soc_pcm_ret(fe, ret);
2255 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2257 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2258 int cmd, bool fe_first)
2260 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2263 /* call trigger on the frontend before the backend. */
2265 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2266 fe->dai_link->name, cmd);
2268 ret = soc_pcm_trigger(substream, cmd);
2272 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2276 /* call trigger on the frontend after the backend. */
2277 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2281 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2282 fe->dai_link->name, cmd);
2284 ret = soc_pcm_trigger(substream, cmd);
2289 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2291 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2292 int stream = substream->stream;
2294 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2296 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2299 case SND_SOC_DPCM_TRIGGER_PRE:
2301 case SNDRV_PCM_TRIGGER_START:
2302 case SNDRV_PCM_TRIGGER_RESUME:
2303 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2304 case SNDRV_PCM_TRIGGER_DRAIN:
2305 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2307 case SNDRV_PCM_TRIGGER_STOP:
2308 case SNDRV_PCM_TRIGGER_SUSPEND:
2309 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2310 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2317 case SND_SOC_DPCM_TRIGGER_POST:
2319 case SNDRV_PCM_TRIGGER_START:
2320 case SNDRV_PCM_TRIGGER_RESUME:
2321 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2322 case SNDRV_PCM_TRIGGER_DRAIN:
2323 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2325 case SNDRV_PCM_TRIGGER_STOP:
2326 case SNDRV_PCM_TRIGGER_SUSPEND:
2327 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2328 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2335 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2336 /* bespoke trigger() - handles both FE and BEs */
2338 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2339 fe->dai_link->name, cmd);
2341 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2344 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2345 fe->dai_link->name);
2351 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2357 case SNDRV_PCM_TRIGGER_START:
2358 case SNDRV_PCM_TRIGGER_RESUME:
2359 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2360 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2362 case SNDRV_PCM_TRIGGER_STOP:
2363 case SNDRV_PCM_TRIGGER_SUSPEND:
2364 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2366 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2367 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2372 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2376 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2378 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2379 int stream = substream->stream;
2381 /* if FE's runtime_update is already set, we're in race;
2382 * process this trigger later at exit
2384 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2385 fe->dpcm[stream].trigger_pending = cmd + 1;
2386 return 0; /* delayed, assuming it's successful */
2389 /* we're alone, let's trigger */
2390 return dpcm_fe_dai_do_trigger(substream, cmd);
2393 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2395 struct snd_soc_dpcm *dpcm;
2398 for_each_dpcm_be(fe, stream, dpcm) {
2400 struct snd_soc_pcm_runtime *be = dpcm->be;
2401 struct snd_pcm_substream *be_substream =
2402 snd_soc_dpcm_get_substream(be, stream);
2404 /* is this op for this BE ? */
2405 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2408 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2411 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2412 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2413 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2414 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2417 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2418 be->dai_link->name);
2420 ret = __soc_pcm_prepare(be, be_substream);
2424 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2427 return soc_pcm_ret(fe, ret);
2430 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2432 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2433 int stream = substream->stream, ret = 0;
2435 snd_soc_dpcm_mutex_lock(fe);
2437 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2439 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2441 /* there is no point preparing this FE if there are no BEs */
2442 if (list_empty(&fe->dpcm[stream].be_clients)) {
2443 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2444 fe->dai_link->name);
2449 ret = dpcm_be_dai_prepare(fe, stream);
2453 /* call prepare on the frontend */
2454 ret = __soc_pcm_prepare(fe, substream);
2458 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2461 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2462 snd_soc_dpcm_mutex_unlock(fe);
2464 return soc_pcm_ret(fe, ret);
2467 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2469 struct snd_pcm_substream *substream =
2470 snd_soc_dpcm_get_substream(fe, stream);
2471 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2474 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2475 stream ? "capture" : "playback", fe->dai_link->name);
2477 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2478 /* call bespoke trigger - FE takes care of all BE triggers */
2479 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2480 fe->dai_link->name);
2482 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2484 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2485 fe->dai_link->name);
2487 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2490 dpcm_be_dai_hw_free(fe, stream);
2492 dpcm_be_dai_shutdown(fe, stream);
2494 /* run the stream event for each BE */
2495 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2497 return soc_pcm_ret(fe, err);
2500 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2502 struct snd_pcm_substream *substream =
2503 snd_soc_dpcm_get_substream(fe, stream);
2504 struct snd_soc_dpcm *dpcm;
2505 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2508 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2509 stream ? "capture" : "playback", fe->dai_link->name);
2511 /* Only start the BE if the FE is ready */
2512 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2513 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2514 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2515 fe->dai_link->name, fe->dpcm[stream].state);
2520 /* startup must always be called for new BEs */
2521 ret = dpcm_be_dai_startup(fe, stream);
2525 /* keep going if FE state is > open */
2526 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2529 ret = dpcm_be_dai_hw_params(fe, stream);
2533 /* keep going if FE state is > hw_params */
2534 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2537 ret = dpcm_be_dai_prepare(fe, stream);
2541 /* run the stream event for each BE */
2542 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2544 /* keep going if FE state is > prepare */
2545 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2546 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2549 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2550 /* call trigger on the frontend - FE takes care of all BE triggers */
2551 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2552 fe->dai_link->name);
2554 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2558 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2559 fe->dai_link->name);
2561 ret = dpcm_be_dai_trigger(fe, stream,
2562 SNDRV_PCM_TRIGGER_START);
2570 dpcm_be_dai_hw_free(fe, stream);
2572 dpcm_be_dai_shutdown(fe, stream);
2574 /* disconnect any pending BEs */
2575 for_each_dpcm_be(fe, stream, dpcm) {
2576 struct snd_soc_pcm_runtime *be = dpcm->be;
2578 /* is this op for this BE ? */
2579 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2582 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2583 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2584 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2587 return soc_pcm_ret(fe, ret);
2590 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2592 struct snd_soc_dapm_widget_list *list;
2596 if (!fe->dai_link->dynamic)
2599 if (fe->dai_link->num_cpus > 1) {
2601 "%s doesn't support Multi CPU yet\n", __func__);
2605 /* only check active links */
2606 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2609 /* DAPM sync will call this to update DSP paths */
2610 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2611 new ? "new" : "old", fe->dai_link->name);
2613 for_each_pcm_streams(stream) {
2615 /* skip if FE doesn't have playback/capture capability */
2616 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2617 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2620 /* skip if FE isn't currently playing/capturing */
2621 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2622 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2625 paths = dpcm_path_get(fe, stream, &list);
2629 /* update any playback/capture paths */
2630 count = dpcm_process_paths(fe, stream, &list, new);
2632 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2634 dpcm_run_update_startup(fe, stream);
2636 dpcm_run_update_shutdown(fe, stream);
2637 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2639 dpcm_clear_pending_state(fe, stream);
2640 dpcm_be_disconnect(fe, stream);
2643 dpcm_path_put(&list);
2649 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2652 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2654 struct snd_soc_pcm_runtime *fe;
2657 snd_soc_dpcm_mutex_lock(card);
2658 /* shutdown all old paths first */
2659 for_each_card_rtds(card, fe) {
2660 ret = soc_dpcm_fe_runtime_update(fe, 0);
2665 /* bring new paths up */
2666 for_each_card_rtds(card, fe) {
2667 ret = soc_dpcm_fe_runtime_update(fe, 1);
2673 snd_soc_dpcm_mutex_unlock(card);
2676 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2678 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2680 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2681 struct snd_soc_dpcm *dpcm;
2682 int stream = fe_substream->stream;
2684 snd_soc_dpcm_mutex_assert_held(fe);
2686 /* mark FE's links ready to prune */
2687 for_each_dpcm_be(fe, stream, dpcm)
2688 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2690 dpcm_be_disconnect(fe, stream);
2693 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2695 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2698 snd_soc_dpcm_mutex_lock(fe);
2699 ret = dpcm_fe_dai_shutdown(fe_substream);
2701 dpcm_fe_dai_cleanup(fe_substream);
2703 snd_soc_dpcm_mutex_unlock(fe);
2707 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2709 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2710 struct snd_soc_dapm_widget_list *list;
2712 int stream = fe_substream->stream;
2714 snd_soc_dpcm_mutex_lock(fe);
2716 ret = dpcm_path_get(fe, stream, &list);
2720 /* calculate valid and active FE <-> BE dpcms */
2721 dpcm_process_paths(fe, stream, &list, 1);
2723 ret = dpcm_fe_dai_startup(fe_substream);
2725 dpcm_fe_dai_cleanup(fe_substream);
2727 dpcm_clear_pending_state(fe, stream);
2728 dpcm_path_put(&list);
2730 snd_soc_dpcm_mutex_unlock(fe);
2734 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2735 int *playback, int *capture)
2737 struct snd_soc_dai *cpu_dai;
2740 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) {
2742 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2746 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2749 if (rtd->dai_link->dpcm_playback) {
2750 stream = SNDRV_PCM_STREAM_PLAYBACK;
2752 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2753 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2759 dev_err(rtd->card->dev,
2760 "No CPU DAIs support playback for stream %s\n",
2761 rtd->dai_link->stream_name);
2765 if (rtd->dai_link->dpcm_capture) {
2766 stream = SNDRV_PCM_STREAM_CAPTURE;
2768 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2769 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2776 dev_err(rtd->card->dev,
2777 "No CPU DAIs support capture for stream %s\n",
2778 rtd->dai_link->stream_name);
2783 struct snd_soc_dai *codec_dai;
2785 /* Adapt stream for codec2codec links */
2786 int cpu_capture = rtd->dai_link->c2c_params ?
2787 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2788 int cpu_playback = rtd->dai_link->c2c_params ?
2789 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2791 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2792 if (rtd->dai_link->num_cpus == 1) {
2793 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2794 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) {
2795 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2797 dev_err(rtd->card->dev,
2798 "N cpus to M codecs link is not supported yet\n");
2802 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2803 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2805 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2806 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2811 if (rtd->dai_link->playback_only) {
2816 if (rtd->dai_link->capture_only) {
2824 static int soc_create_pcm(struct snd_pcm **pcm,
2825 struct snd_soc_pcm_runtime *rtd,
2826 int playback, int capture, int num)
2831 /* create the PCM */
2832 if (rtd->dai_link->c2c_params) {
2833 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2834 rtd->dai_link->stream_name);
2836 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2837 playback, capture, pcm);
2838 } else if (rtd->dai_link->no_pcm) {
2839 snprintf(new_name, sizeof(new_name), "(%s)",
2840 rtd->dai_link->stream_name);
2842 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2843 playback, capture, pcm);
2845 if (rtd->dai_link->dynamic)
2846 snprintf(new_name, sizeof(new_name), "%s (*)",
2847 rtd->dai_link->stream_name);
2849 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2850 rtd->dai_link->stream_name,
2851 soc_codec_dai_name(rtd), num);
2853 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2857 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2858 new_name, rtd->dai_link->name, ret);
2861 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2866 /* create a new pcm */
2867 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2869 struct snd_soc_component *component;
2870 struct snd_pcm *pcm;
2871 int ret = 0, playback = 0, capture = 0;
2874 ret = soc_get_playback_capture(rtd, &playback, &capture);
2878 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2882 /* DAPM dai link stream work */
2884 * Currently nothing to do for c2c links
2885 * Since c2c links are internal nodes in the DAPM graph and
2886 * don't interface with the outside world or application layer
2887 * we don't have to do any special handling on close.
2889 if (!rtd->dai_link->c2c_params)
2890 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2893 pcm->nonatomic = rtd->dai_link->nonatomic;
2894 pcm->private_data = rtd;
2895 pcm->no_device_suspend = true;
2897 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2899 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2901 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2905 /* ASoC PCM operations */
2906 if (rtd->dai_link->dynamic) {
2907 rtd->ops.open = dpcm_fe_dai_open;
2908 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2909 rtd->ops.prepare = dpcm_fe_dai_prepare;
2910 rtd->ops.trigger = dpcm_fe_dai_trigger;
2911 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2912 rtd->ops.close = dpcm_fe_dai_close;
2913 rtd->ops.pointer = soc_pcm_pointer;
2915 rtd->ops.open = soc_pcm_open;
2916 rtd->ops.hw_params = soc_pcm_hw_params;
2917 rtd->ops.prepare = soc_pcm_prepare;
2918 rtd->ops.trigger = soc_pcm_trigger;
2919 rtd->ops.hw_free = soc_pcm_hw_free;
2920 rtd->ops.close = soc_pcm_close;
2921 rtd->ops.pointer = soc_pcm_pointer;
2924 for_each_rtd_components(rtd, i, component) {
2925 const struct snd_soc_component_driver *drv = component->driver;
2928 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2930 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2932 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2934 rtd->ops.page = snd_soc_pcm_component_page;
2936 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2938 rtd->ops.ack = snd_soc_pcm_component_ack;
2942 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2945 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2947 ret = snd_soc_pcm_component_new(rtd);
2951 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2952 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2956 /* is the current PCM operation for this FE ? */
2957 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2959 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2963 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2965 /* is the current PCM operation for this BE ? */
2966 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2967 struct snd_soc_pcm_runtime *be, int stream)
2969 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2970 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2971 be->dpcm[stream].runtime_update))
2975 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2977 /* get the substream for this BE */
2978 struct snd_pcm_substream *
2979 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2981 return be->pcm->streams[stream].substream;
2983 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2985 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2986 struct snd_soc_pcm_runtime *be,
2988 const enum snd_soc_dpcm_state *states,
2991 struct snd_soc_dpcm *dpcm;
2996 for_each_dpcm_fe(be, stream, dpcm) {
3001 state = dpcm->fe->dpcm[stream].state;
3002 for (i = 0; i < num_states; i++) {
3003 if (state == states[i]) {
3010 /* it's safe to do this BE DAI */
3015 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3016 * are not running, paused or suspended for the specified stream direction.
3018 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3019 struct snd_soc_pcm_runtime *be, int stream)
3021 const enum snd_soc_dpcm_state state[] = {
3022 SND_SOC_DPCM_STATE_START,
3023 SND_SOC_DPCM_STATE_PAUSED,
3024 SND_SOC_DPCM_STATE_SUSPEND,
3027 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3029 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3032 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3033 * running, paused or suspended for the specified stream direction.
3035 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3036 struct snd_soc_pcm_runtime *be, int stream)
3038 const enum snd_soc_dpcm_state state[] = {
3039 SND_SOC_DPCM_STATE_START,
3040 SND_SOC_DPCM_STATE_PAUSED,
3041 SND_SOC_DPCM_STATE_SUSPEND,
3042 SND_SOC_DPCM_STATE_PREPARE,
3045 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3047 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3050 * We can only prepare a BE DAI if any of it's FE are not prepared,
3051 * running or paused for the specified stream direction.
3053 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3054 struct snd_soc_pcm_runtime *be, int stream)
3056 const enum snd_soc_dpcm_state state[] = {
3057 SND_SOC_DPCM_STATE_START,
3058 SND_SOC_DPCM_STATE_PAUSED,
3059 SND_SOC_DPCM_STATE_PREPARE,
3062 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3064 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);