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 = &dpcm->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;
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) {
1985 be_substream = snd_soc_dpcm_get_substream(be, stream);
1987 /* is this op for this BE ? */
1988 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1991 /* copy params for each dpcm */
1992 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1993 sizeof(struct snd_pcm_hw_params));
1995 /* perform any hw_params fixups */
1996 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
2000 /* copy the fixed-up hw params for BE dai */
2001 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2002 sizeof(struct snd_pcm_hw_params));
2004 /* only allow hw_params() if no connected FEs are running */
2005 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2008 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2009 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2010 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2013 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2014 be->dai_link->name);
2016 ret = __soc_pcm_hw_params(be, be_substream, &dpcm->hw_params);
2020 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2025 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2026 __func__, be->dai_link->name, ret);
2028 /* disable any enabled and non active backends */
2029 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2031 be_substream = snd_soc_dpcm_get_substream(be, stream);
2033 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2036 /* only allow hw_free() if no connected FEs are running */
2037 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2040 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2042 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2046 __soc_pcm_hw_free(be, be_substream);
2052 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2053 struct snd_pcm_hw_params *params)
2055 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2056 int ret, stream = substream->stream;
2058 snd_soc_dpcm_mutex_lock(fe);
2059 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2061 memcpy(&fe->dpcm[stream].hw_params, params,
2062 sizeof(struct snd_pcm_hw_params));
2063 ret = dpcm_be_dai_hw_params(fe, stream);
2067 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2068 fe->dai_link->name, params_rate(params),
2069 params_channels(params), params_format(params));
2071 /* call hw_params on the frontend */
2072 ret = __soc_pcm_hw_params(fe, substream, params);
2074 dpcm_be_dai_hw_free(fe, stream);
2076 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2079 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2080 snd_soc_dpcm_mutex_unlock(fe);
2082 return soc_pcm_ret(fe, ret);
2085 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2088 struct snd_soc_pcm_runtime *be;
2089 bool pause_stop_transition;
2090 struct snd_soc_dpcm *dpcm;
2091 unsigned long flags;
2094 for_each_dpcm_be(fe, stream, dpcm) {
2095 struct snd_pcm_substream *be_substream;
2098 be_substream = snd_soc_dpcm_get_substream(be, stream);
2100 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2102 /* is this op for this BE ? */
2103 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2106 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2107 be->dai_link->name, cmd);
2110 case SNDRV_PCM_TRIGGER_START:
2111 if (!be->dpcm[stream].be_start &&
2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2113 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2114 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2117 be->dpcm[stream].be_start++;
2118 if (be->dpcm[stream].be_start != 1)
2121 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2122 ret = soc_pcm_trigger(be_substream,
2123 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2125 ret = soc_pcm_trigger(be_substream,
2126 SNDRV_PCM_TRIGGER_START);
2128 be->dpcm[stream].be_start--;
2132 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2134 case SNDRV_PCM_TRIGGER_RESUME:
2135 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2138 be->dpcm[stream].be_start++;
2139 if (be->dpcm[stream].be_start != 1)
2142 ret = soc_pcm_trigger(be_substream, cmd);
2144 be->dpcm[stream].be_start--;
2148 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2150 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2151 if (!be->dpcm[stream].be_start &&
2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2153 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2156 fe->dpcm[stream].fe_pause = false;
2157 be->dpcm[stream].be_pause--;
2159 be->dpcm[stream].be_start++;
2160 if (be->dpcm[stream].be_start != 1)
2163 ret = soc_pcm_trigger(be_substream, cmd);
2165 be->dpcm[stream].be_start--;
2169 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2171 case SNDRV_PCM_TRIGGER_STOP:
2172 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2173 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2176 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2177 be->dpcm[stream].be_start--;
2179 if (be->dpcm[stream].be_start != 0)
2182 pause_stop_transition = false;
2183 if (fe->dpcm[stream].fe_pause) {
2184 pause_stop_transition = true;
2185 fe->dpcm[stream].fe_pause = false;
2186 be->dpcm[stream].be_pause--;
2189 if (be->dpcm[stream].be_pause != 0)
2190 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2192 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2195 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2196 be->dpcm[stream].be_start++;
2197 if (pause_stop_transition) {
2198 fe->dpcm[stream].fe_pause = true;
2199 be->dpcm[stream].be_pause++;
2204 if (be->dpcm[stream].be_pause != 0)
2205 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2207 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2210 case SNDRV_PCM_TRIGGER_SUSPEND:
2211 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2214 be->dpcm[stream].be_start--;
2215 if (be->dpcm[stream].be_start != 0)
2218 ret = soc_pcm_trigger(be_substream, cmd);
2220 be->dpcm[stream].be_start++;
2224 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2226 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2227 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2230 fe->dpcm[stream].fe_pause = true;
2231 be->dpcm[stream].be_pause++;
2233 be->dpcm[stream].be_start--;
2234 if (be->dpcm[stream].be_start != 0)
2237 ret = soc_pcm_trigger(be_substream, cmd);
2239 be->dpcm[stream].be_start++;
2243 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2247 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2251 return soc_pcm_ret(fe, ret);
2253 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2255 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2256 int cmd, bool fe_first)
2258 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2261 /* call trigger on the frontend before the backend. */
2263 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2264 fe->dai_link->name, cmd);
2266 ret = soc_pcm_trigger(substream, cmd);
2270 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2274 /* call trigger on the frontend after the backend. */
2275 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2279 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2280 fe->dai_link->name, cmd);
2282 ret = soc_pcm_trigger(substream, cmd);
2287 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2289 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2290 int stream = substream->stream;
2292 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2294 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2297 case SND_SOC_DPCM_TRIGGER_PRE:
2299 case SNDRV_PCM_TRIGGER_START:
2300 case SNDRV_PCM_TRIGGER_RESUME:
2301 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2302 case SNDRV_PCM_TRIGGER_DRAIN:
2303 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2305 case SNDRV_PCM_TRIGGER_STOP:
2306 case SNDRV_PCM_TRIGGER_SUSPEND:
2307 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2308 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2315 case SND_SOC_DPCM_TRIGGER_POST:
2317 case SNDRV_PCM_TRIGGER_START:
2318 case SNDRV_PCM_TRIGGER_RESUME:
2319 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2320 case SNDRV_PCM_TRIGGER_DRAIN:
2321 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2323 case SNDRV_PCM_TRIGGER_STOP:
2324 case SNDRV_PCM_TRIGGER_SUSPEND:
2325 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2326 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2333 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2334 /* bespoke trigger() - handles both FE and BEs */
2336 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2337 fe->dai_link->name, cmd);
2339 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2342 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2343 fe->dai_link->name);
2349 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2355 case SNDRV_PCM_TRIGGER_START:
2356 case SNDRV_PCM_TRIGGER_RESUME:
2357 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2358 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2360 case SNDRV_PCM_TRIGGER_STOP:
2361 case SNDRV_PCM_TRIGGER_SUSPEND:
2362 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2364 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2365 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2370 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2374 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2376 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2377 int stream = substream->stream;
2379 /* if FE's runtime_update is already set, we're in race;
2380 * process this trigger later at exit
2382 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2383 fe->dpcm[stream].trigger_pending = cmd + 1;
2384 return 0; /* delayed, assuming it's successful */
2387 /* we're alone, let's trigger */
2388 return dpcm_fe_dai_do_trigger(substream, cmd);
2391 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2393 struct snd_soc_dpcm *dpcm;
2396 for_each_dpcm_be(fe, stream, dpcm) {
2398 struct snd_soc_pcm_runtime *be = dpcm->be;
2399 struct snd_pcm_substream *be_substream =
2400 snd_soc_dpcm_get_substream(be, stream);
2402 /* is this op for this BE ? */
2403 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2406 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2409 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2410 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2411 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2412 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2415 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2416 be->dai_link->name);
2418 ret = __soc_pcm_prepare(be, be_substream);
2422 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2425 return soc_pcm_ret(fe, ret);
2428 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2430 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2431 int stream = substream->stream, ret = 0;
2433 snd_soc_dpcm_mutex_lock(fe);
2435 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2437 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2439 /* there is no point preparing this FE if there are no BEs */
2440 if (list_empty(&fe->dpcm[stream].be_clients)) {
2441 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2442 fe->dai_link->name);
2447 ret = dpcm_be_dai_prepare(fe, stream);
2451 /* call prepare on the frontend */
2452 ret = __soc_pcm_prepare(fe, substream);
2456 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2459 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2460 snd_soc_dpcm_mutex_unlock(fe);
2462 return soc_pcm_ret(fe, ret);
2465 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2467 struct snd_pcm_substream *substream =
2468 snd_soc_dpcm_get_substream(fe, stream);
2469 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2472 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2473 stream ? "capture" : "playback", fe->dai_link->name);
2475 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2476 /* call bespoke trigger - FE takes care of all BE triggers */
2477 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2478 fe->dai_link->name);
2480 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2482 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2483 fe->dai_link->name);
2485 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2488 dpcm_be_dai_hw_free(fe, stream);
2490 dpcm_be_dai_shutdown(fe, stream);
2492 /* run the stream event for each BE */
2493 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2495 return soc_pcm_ret(fe, err);
2498 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2500 struct snd_pcm_substream *substream =
2501 snd_soc_dpcm_get_substream(fe, stream);
2502 struct snd_soc_dpcm *dpcm;
2503 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2506 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2507 stream ? "capture" : "playback", fe->dai_link->name);
2509 /* Only start the BE if the FE is ready */
2510 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2511 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2512 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2513 fe->dai_link->name, fe->dpcm[stream].state);
2518 /* startup must always be called for new BEs */
2519 ret = dpcm_be_dai_startup(fe, stream);
2523 /* keep going if FE state is > open */
2524 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2527 ret = dpcm_be_dai_hw_params(fe, stream);
2531 /* keep going if FE state is > hw_params */
2532 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2535 ret = dpcm_be_dai_prepare(fe, stream);
2539 /* run the stream event for each BE */
2540 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2542 /* keep going if FE state is > prepare */
2543 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2544 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2547 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2548 /* call trigger on the frontend - FE takes care of all BE triggers */
2549 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2550 fe->dai_link->name);
2552 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2556 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2557 fe->dai_link->name);
2559 ret = dpcm_be_dai_trigger(fe, stream,
2560 SNDRV_PCM_TRIGGER_START);
2568 dpcm_be_dai_hw_free(fe, stream);
2570 dpcm_be_dai_shutdown(fe, stream);
2572 /* disconnect any pending BEs */
2573 for_each_dpcm_be(fe, stream, dpcm) {
2574 struct snd_soc_pcm_runtime *be = dpcm->be;
2576 /* is this op for this BE ? */
2577 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2580 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2581 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2582 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2585 return soc_pcm_ret(fe, ret);
2588 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2590 struct snd_soc_dapm_widget_list *list;
2594 if (!fe->dai_link->dynamic)
2597 if (fe->dai_link->num_cpus > 1) {
2599 "%s doesn't support Multi CPU yet\n", __func__);
2603 /* only check active links */
2604 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2607 /* DAPM sync will call this to update DSP paths */
2608 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2609 new ? "new" : "old", fe->dai_link->name);
2611 for_each_pcm_streams(stream) {
2613 /* skip if FE doesn't have playback/capture capability */
2614 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2615 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2618 /* skip if FE isn't currently playing/capturing */
2619 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2620 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2623 paths = dpcm_path_get(fe, stream, &list);
2627 /* update any playback/capture paths */
2628 count = dpcm_process_paths(fe, stream, &list, new);
2630 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2632 dpcm_run_update_startup(fe, stream);
2634 dpcm_run_update_shutdown(fe, stream);
2635 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2637 dpcm_clear_pending_state(fe, stream);
2638 dpcm_be_disconnect(fe, stream);
2641 dpcm_path_put(&list);
2647 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2650 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2652 struct snd_soc_pcm_runtime *fe;
2655 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
2656 /* shutdown all old paths first */
2657 for_each_card_rtds(card, fe) {
2658 ret = soc_dpcm_fe_runtime_update(fe, 0);
2663 /* bring new paths up */
2664 for_each_card_rtds(card, fe) {
2665 ret = soc_dpcm_fe_runtime_update(fe, 1);
2671 mutex_unlock(&card->pcm_mutex);
2674 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2676 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2678 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2679 struct snd_soc_dpcm *dpcm;
2680 int stream = fe_substream->stream;
2682 snd_soc_dpcm_mutex_assert_held(fe);
2684 /* mark FE's links ready to prune */
2685 for_each_dpcm_be(fe, stream, dpcm)
2686 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2688 dpcm_be_disconnect(fe, stream);
2690 fe->dpcm[stream].runtime = NULL;
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);
2715 fe->dpcm[stream].runtime = fe_substream->runtime;
2717 ret = dpcm_path_get(fe, stream, &list);
2721 /* calculate valid and active FE <-> BE dpcms */
2722 dpcm_process_paths(fe, stream, &list, 1);
2724 ret = dpcm_fe_dai_startup(fe_substream);
2726 dpcm_fe_dai_cleanup(fe_substream);
2728 dpcm_clear_pending_state(fe, stream);
2729 dpcm_path_put(&list);
2731 snd_soc_dpcm_mutex_unlock(fe);
2735 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2736 int *playback, int *capture)
2738 struct snd_soc_dai *cpu_dai;
2741 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) {
2743 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2747 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2750 if (rtd->dai_link->dpcm_playback) {
2751 stream = SNDRV_PCM_STREAM_PLAYBACK;
2753 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2754 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2760 dev_err(rtd->card->dev,
2761 "No CPU DAIs support playback for stream %s\n",
2762 rtd->dai_link->stream_name);
2766 if (rtd->dai_link->dpcm_capture) {
2767 stream = SNDRV_PCM_STREAM_CAPTURE;
2769 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2770 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2777 dev_err(rtd->card->dev,
2778 "No CPU DAIs support capture for stream %s\n",
2779 rtd->dai_link->stream_name);
2784 struct snd_soc_dai *codec_dai;
2786 /* Adapt stream for codec2codec links */
2787 int cpu_capture = rtd->dai_link->params ?
2788 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2789 int cpu_playback = rtd->dai_link->params ?
2790 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2792 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2793 if (rtd->dai_link->num_cpus == 1) {
2794 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2795 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) {
2796 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2798 dev_err(rtd->card->dev,
2799 "N cpus to M codecs link is not supported yet\n");
2803 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2804 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2806 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2807 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2812 if (rtd->dai_link->playback_only) {
2817 if (rtd->dai_link->capture_only) {
2825 static int soc_create_pcm(struct snd_pcm **pcm,
2826 struct snd_soc_pcm_runtime *rtd,
2827 int playback, int capture, int num)
2832 /* create the PCM */
2833 if (rtd->dai_link->params) {
2834 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2835 rtd->dai_link->stream_name);
2837 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2838 playback, capture, pcm);
2839 } else if (rtd->dai_link->no_pcm) {
2840 snprintf(new_name, sizeof(new_name), "(%s)",
2841 rtd->dai_link->stream_name);
2843 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2844 playback, capture, pcm);
2846 if (rtd->dai_link->dynamic)
2847 snprintf(new_name, sizeof(new_name), "%s (*)",
2848 rtd->dai_link->stream_name);
2850 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2851 rtd->dai_link->stream_name,
2852 soc_codec_dai_name(rtd), num);
2854 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2858 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2859 new_name, rtd->dai_link->name, ret);
2862 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2867 /* create a new pcm */
2868 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2870 struct snd_soc_component *component;
2871 struct snd_pcm *pcm;
2872 int ret = 0, playback = 0, capture = 0;
2875 ret = soc_get_playback_capture(rtd, &playback, &capture);
2879 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2883 /* DAPM dai link stream work */
2885 * Currently nothing to do for c2c links
2886 * Since c2c links are internal nodes in the DAPM graph and
2887 * don't interface with the outside world or application layer
2888 * we don't have to do any special handling on close.
2890 if (!rtd->dai_link->params)
2891 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2894 pcm->nonatomic = rtd->dai_link->nonatomic;
2895 pcm->private_data = rtd;
2896 pcm->no_device_suspend = true;
2898 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2900 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2902 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2906 /* ASoC PCM operations */
2907 if (rtd->dai_link->dynamic) {
2908 rtd->ops.open = dpcm_fe_dai_open;
2909 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2910 rtd->ops.prepare = dpcm_fe_dai_prepare;
2911 rtd->ops.trigger = dpcm_fe_dai_trigger;
2912 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2913 rtd->ops.close = dpcm_fe_dai_close;
2914 rtd->ops.pointer = soc_pcm_pointer;
2916 rtd->ops.open = soc_pcm_open;
2917 rtd->ops.hw_params = soc_pcm_hw_params;
2918 rtd->ops.prepare = soc_pcm_prepare;
2919 rtd->ops.trigger = soc_pcm_trigger;
2920 rtd->ops.hw_free = soc_pcm_hw_free;
2921 rtd->ops.close = soc_pcm_close;
2922 rtd->ops.pointer = soc_pcm_pointer;
2925 for_each_rtd_components(rtd, i, component) {
2926 const struct snd_soc_component_driver *drv = component->driver;
2929 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2931 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2933 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2935 rtd->ops.page = snd_soc_pcm_component_page;
2937 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2939 rtd->ops.ack = snd_soc_pcm_component_ack;
2943 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2946 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2948 ret = snd_soc_pcm_component_new(rtd);
2952 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2953 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2957 /* is the current PCM operation for this FE ? */
2958 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2960 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2964 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2966 /* is the current PCM operation for this BE ? */
2967 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2968 struct snd_soc_pcm_runtime *be, int stream)
2970 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2971 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2972 be->dpcm[stream].runtime_update))
2976 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2978 /* get the substream for this BE */
2979 struct snd_pcm_substream *
2980 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2982 return be->pcm->streams[stream].substream;
2984 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2986 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2987 struct snd_soc_pcm_runtime *be,
2989 const enum snd_soc_dpcm_state *states,
2992 struct snd_soc_dpcm *dpcm;
2997 for_each_dpcm_fe(be, stream, dpcm) {
3002 state = dpcm->fe->dpcm[stream].state;
3003 for (i = 0; i < num_states; i++) {
3004 if (state == states[i]) {
3011 /* it's safe to do this BE DAI */
3016 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3017 * are not running, paused or suspended for the specified stream direction.
3019 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3020 struct snd_soc_pcm_runtime *be, int stream)
3022 const enum snd_soc_dpcm_state state[] = {
3023 SND_SOC_DPCM_STATE_START,
3024 SND_SOC_DPCM_STATE_PAUSED,
3025 SND_SOC_DPCM_STATE_SUSPEND,
3028 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3030 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3033 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3034 * running, paused or suspended for the specified stream direction.
3036 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3037 struct snd_soc_pcm_runtime *be, int stream)
3039 const enum snd_soc_dpcm_state state[] = {
3040 SND_SOC_DPCM_STATE_START,
3041 SND_SOC_DPCM_STATE_PAUSED,
3042 SND_SOC_DPCM_STATE_SUSPEND,
3043 SND_SOC_DPCM_STATE_PREPARE,
3046 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3048 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3051 * We can only prepare a BE DAI if any of it's FE are not prepared,
3052 * running or paused for the specified stream direction.
3054 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3055 struct snd_soc_pcm_runtime *be, int stream)
3057 const enum snd_soc_dpcm_state state[] = {
3058 SND_SOC_DPCM_STATE_START,
3059 SND_SOC_DPCM_STATE_PAUSED,
3060 SND_SOC_DPCM_STATE_PREPARE,
3063 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3065 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);