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/slab.h>
18 #include <linux/workqueue.h>
19 #include <linux/export.h>
20 #include <linux/debugfs.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/soc-dpcm.h>
26 #include <sound/soc-link.h>
27 #include <sound/initval.h>
29 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
30 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
31 const char *func, int ret)
33 /* Positive, Zero values are not errors */
37 /* 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 ? snd_soc_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 ? snd_soc_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(snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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);
702 /* Make sure DAI parameters cleared if the DAI becomes inactive */
703 for_each_rtd_dais(rtd, i, dai) {
704 if (snd_soc_dai_active(dai) == 0 &&
705 (dai->rate || dai->channels || dai->sample_bits))
706 soc_pcm_set_dai_params(dai, NULL);
710 for_each_rtd_dais(rtd, i, dai)
711 snd_soc_dai_shutdown(dai, substream, rollback);
713 snd_soc_link_shutdown(substream, rollback);
715 soc_pcm_components_close(substream, rollback);
717 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
719 for_each_rtd_components(rtd, i, component)
720 if (!snd_soc_component_active(component))
721 pinctrl_pm_select_sleep_state(component->dev);
727 * Called by ALSA when a PCM substream is closed. Private data can be
728 * freed here. The cpu DAI, codec DAI, machine and components are also
731 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
732 struct snd_pcm_substream *substream)
734 return soc_pcm_clean(rtd, substream, 0);
737 /* PCM close ops for non-DPCM streams */
738 static int soc_pcm_close(struct snd_pcm_substream *substream)
740 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
742 snd_soc_dpcm_mutex_lock(rtd);
743 __soc_pcm_close(rtd, substream);
744 snd_soc_dpcm_mutex_unlock(rtd);
748 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
750 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
751 struct snd_pcm_hardware *hw = &substream->runtime->hw;
752 const char *name_cpu = soc_cpu_dai_name(rtd);
753 const char *name_codec = soc_codec_dai_name(rtd);
755 struct device *dev = rtd->dev;
765 err_msg = "channels";
766 if (!hw->channels_min || !hw->channels_max ||
767 hw->channels_min > hw->channels_max)
770 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
772 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
773 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
775 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
781 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
782 name_codec, name_cpu, err_msg);
787 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
788 * then initialized and any private data can be allocated. This also calls
789 * startup for the cpu DAI, component, machine and codec DAI.
791 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
792 struct snd_pcm_substream *substream)
794 struct snd_soc_component *component;
795 struct snd_soc_dai *dai;
798 snd_soc_dpcm_mutex_assert_held(rtd);
800 for_each_rtd_components(rtd, i, component)
801 pinctrl_pm_select_default_state(component->dev);
803 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
807 ret = soc_pcm_components_open(substream);
811 ret = snd_soc_link_startup(substream);
815 /* startup the audio subsystem */
816 for_each_rtd_dais(rtd, i, dai) {
817 ret = snd_soc_dai_startup(dai, substream);
822 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
823 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
826 /* Check that the codec and cpu DAIs are compatible */
827 soc_pcm_init_runtime_hw(substream);
829 soc_pcm_update_symmetry(substream);
831 ret = soc_hw_sanity_check(substream);
835 soc_pcm_apply_msb(substream);
837 /* Symmetry only applies if we've already got an active stream. */
838 for_each_rtd_dais(rtd, i, dai) {
839 ret = soc_pcm_apply_symmetry(substream, dai);
844 snd_soc_runtime_activate(rtd, substream->stream);
848 soc_pcm_clean(rtd, substream, 1);
850 return soc_pcm_ret(rtd, ret);
853 /* PCM open ops for non-DPCM streams */
854 static int soc_pcm_open(struct snd_pcm_substream *substream)
856 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
859 snd_soc_dpcm_mutex_lock(rtd);
860 ret = __soc_pcm_open(rtd, substream);
861 snd_soc_dpcm_mutex_unlock(rtd);
866 * Called by ALSA when the PCM substream is prepared, can set format, sample
867 * rate, etc. This function is non atomic and can be called multiple times,
868 * it can refer to the runtime info.
870 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
871 struct snd_pcm_substream *substream)
873 struct snd_soc_dai *dai;
876 snd_soc_dpcm_mutex_assert_held(rtd);
878 ret = snd_soc_link_prepare(substream);
882 ret = snd_soc_pcm_component_prepare(substream);
886 ret = snd_soc_pcm_dai_prepare(substream);
890 /* cancel any delayed stream shutdown that is pending */
891 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
894 cancel_delayed_work(&rtd->delayed_work);
897 snd_soc_dapm_stream_event(rtd, substream->stream,
898 SND_SOC_DAPM_STREAM_START);
900 for_each_rtd_dais(rtd, i, dai) {
901 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
902 snd_soc_dai_digital_mute(dai, 0, substream->stream);
906 return soc_pcm_ret(rtd, ret);
909 /* PCM prepare ops for non-DPCM streams */
910 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
912 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
915 snd_soc_dpcm_mutex_lock(rtd);
916 ret = __soc_pcm_prepare(rtd, substream);
917 snd_soc_dpcm_mutex_unlock(rtd);
921 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
924 struct snd_interval *interval;
925 int channels = hweight_long(mask);
927 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
928 interval->min = channels;
929 interval->max = channels;
932 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
933 struct snd_pcm_substream *substream, int rollback)
935 struct snd_soc_dai *dai;
938 snd_soc_dpcm_mutex_assert_held(rtd);
940 /* clear the corresponding DAIs parameters when going to be inactive */
941 for_each_rtd_dais(rtd, i, dai) {
942 if (snd_soc_dai_active(dai) == 1)
943 soc_pcm_set_dai_params(dai, NULL);
945 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
946 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
947 snd_soc_dai_digital_mute(dai, 1, substream->stream);
951 /* run the stream event */
952 snd_soc_dapm_stream_stop(rtd, substream->stream);
954 /* free any machine hw params */
955 snd_soc_link_hw_free(substream, rollback);
957 /* free any component resources */
958 snd_soc_pcm_component_hw_free(substream, rollback);
960 /* now free hw params for the DAIs */
961 for_each_rtd_dais(rtd, i, dai)
962 if (snd_soc_dai_stream_valid(dai, substream->stream))
963 snd_soc_dai_hw_free(dai, substream, rollback);
969 * Frees resources allocated by hw_params, can be called multiple times
971 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
972 struct snd_pcm_substream *substream)
974 return soc_pcm_hw_clean(rtd, substream, 0);
977 /* hw_free PCM ops for non-DPCM streams */
978 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
980 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
983 snd_soc_dpcm_mutex_lock(rtd);
984 ret = __soc_pcm_hw_free(rtd, substream);
985 snd_soc_dpcm_mutex_unlock(rtd);
990 * Called by ALSA when the hardware params are set by application. This
991 * function can also be called multiple times and can allocate buffers
992 * (using snd_pcm_lib_* ). It's non-atomic.
994 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
995 struct snd_pcm_substream *substream,
996 struct snd_pcm_hw_params *params)
998 struct snd_soc_dai *cpu_dai;
999 struct snd_soc_dai *codec_dai;
1000 struct snd_pcm_hw_params tmp_params;
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 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
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 tmp_params = *params;
1036 /* fixup params based on TDM slot masks */
1038 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
1040 ret = snd_soc_dai_hw_params(codec_dai, substream,
1045 soc_pcm_set_dai_params(codec_dai, &tmp_params);
1046 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
1049 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1050 unsigned int ch_mask = 0;
1054 * Skip CPUs which don't support the current stream
1055 * type. See soc_pcm_init_runtime_hw() for more details
1057 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1060 /* copy params for each cpu */
1061 tmp_params = *params;
1063 if (!rtd->dai_link->codec_ch_maps)
1066 * construct cpu channel mask by combining ch_mask of each
1067 * codec which maps to the cpu.
1069 for_each_rtd_codec_dais(rtd, j, codec_dai) {
1070 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
1071 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
1074 /* fixup cpu channel number */
1076 soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
1079 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
1083 /* store the parameters for each DAI */
1084 soc_pcm_set_dai_params(cpu_dai, &tmp_params);
1085 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
1088 ret = snd_soc_pcm_component_hw_params(substream, params);
1091 soc_pcm_hw_clean(rtd, substream, 1);
1093 return soc_pcm_ret(rtd, ret);
1096 /* hw_params PCM ops for non-DPCM streams */
1097 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1098 struct snd_pcm_hw_params *params)
1100 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1103 snd_soc_dpcm_mutex_lock(rtd);
1104 ret = __soc_pcm_hw_params(rtd, substream, params);
1105 snd_soc_dpcm_mutex_unlock(rtd);
1109 #define TRIGGER_MAX 3
1110 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1111 [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1112 snd_soc_link_trigger,
1113 snd_soc_pcm_component_trigger,
1114 snd_soc_pcm_dai_trigger,
1116 [SND_SOC_TRIGGER_ORDER_LDC] = {
1117 snd_soc_link_trigger,
1118 snd_soc_pcm_dai_trigger,
1119 snd_soc_pcm_component_trigger,
1123 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1125 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1126 struct snd_soc_component *component;
1127 int ret = 0, r = 0, i;
1129 int start = 0, stop = 0;
1132 * select START/STOP sequence
1134 for_each_rtd_components(rtd, i, component) {
1135 if (component->driver->trigger_start)
1136 start = component->driver->trigger_start;
1137 if (component->driver->trigger_stop)
1138 stop = component->driver->trigger_stop;
1140 if (rtd->dai_link->trigger_start)
1141 start = rtd->dai_link->trigger_start;
1142 if (rtd->dai_link->trigger_stop)
1143 stop = rtd->dai_link->trigger_stop;
1145 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1146 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX)
1153 case SNDRV_PCM_TRIGGER_START:
1154 case SNDRV_PCM_TRIGGER_RESUME:
1155 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1156 for (i = 0; i < TRIGGER_MAX; i++) {
1157 r = trigger[start][i](substream, cmd, 0);
1164 * Rollback if START failed
1165 * find correspond STOP command
1171 case SNDRV_PCM_TRIGGER_START:
1172 cmd = SNDRV_PCM_TRIGGER_STOP;
1174 case SNDRV_PCM_TRIGGER_RESUME:
1175 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1177 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1178 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1187 case SNDRV_PCM_TRIGGER_STOP:
1188 case SNDRV_PCM_TRIGGER_SUSPEND:
1189 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1190 for (i = TRIGGER_MAX; i > 0; i--) {
1191 r = trigger[stop][i - 1](substream, cmd, rollback);
1201 * soc level wrapper for pointer callback
1202 * If cpu_dai, codec_dai, component driver has the delay callback, then
1203 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1205 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1207 struct snd_pcm_runtime *runtime = substream->runtime;
1208 snd_pcm_uframes_t offset = 0;
1209 snd_pcm_sframes_t codec_delay = 0;
1210 snd_pcm_sframes_t cpu_delay = 0;
1212 offset = snd_soc_pcm_component_pointer(substream);
1214 /* should be called *after* snd_soc_pcm_component_pointer() */
1215 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1216 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1218 runtime->delay = cpu_delay + codec_delay;
1223 /* connect a FE and BE */
1224 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1225 struct snd_soc_pcm_runtime *be, int stream)
1227 struct snd_pcm_substream *fe_substream;
1228 struct snd_pcm_substream *be_substream;
1229 struct snd_soc_dpcm *dpcm;
1231 snd_soc_dpcm_mutex_assert_held(fe);
1233 /* only add new dpcms */
1234 for_each_dpcm_be(fe, stream, dpcm) {
1235 if (dpcm->be == be && dpcm->fe == fe)
1239 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1240 be_substream = snd_soc_dpcm_get_substream(be, stream);
1242 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1243 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1247 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1248 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1249 be_substream->pcm->nonatomic = 1;
1252 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1258 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1259 snd_soc_dpcm_stream_lock_irq(fe, stream);
1260 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1261 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1262 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1264 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1265 stream ? "capture" : "playback", fe->dai_link->name,
1266 stream ? "<-" : "->", be->dai_link->name);
1268 dpcm_create_debugfs_state(dpcm, stream);
1273 /* reparent a BE onto another FE */
1274 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1275 struct snd_soc_pcm_runtime *be, int stream)
1277 struct snd_soc_dpcm *dpcm;
1278 struct snd_pcm_substream *fe_substream, *be_substream;
1280 /* reparent if BE is connected to other FEs */
1281 if (!be->dpcm[stream].users)
1284 be_substream = snd_soc_dpcm_get_substream(be, stream);
1288 for_each_dpcm_fe(be, stream, dpcm) {
1292 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1293 stream ? "capture" : "playback",
1294 dpcm->fe->dai_link->name,
1295 stream ? "<-" : "->", dpcm->be->dai_link->name);
1297 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1298 be_substream->runtime = fe_substream->runtime;
1303 /* disconnect a BE and FE */
1304 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1306 struct snd_soc_dpcm *dpcm, *d;
1307 LIST_HEAD(deleted_dpcms);
1309 snd_soc_dpcm_mutex_assert_held(fe);
1311 snd_soc_dpcm_stream_lock_irq(fe, stream);
1312 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1313 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1314 stream ? "capture" : "playback",
1315 dpcm->be->dai_link->name);
1317 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1320 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1321 stream ? "capture" : "playback", fe->dai_link->name,
1322 stream ? "<-" : "->", dpcm->be->dai_link->name);
1324 /* BEs still alive need new FE */
1325 dpcm_be_reparent(fe, dpcm->be, stream);
1327 list_del(&dpcm->list_be);
1328 list_move(&dpcm->list_fe, &deleted_dpcms);
1330 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1332 while (!list_empty(&deleted_dpcms)) {
1333 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1335 list_del(&dpcm->list_fe);
1336 dpcm_remove_debugfs_state(dpcm);
1341 /* get BE for DAI widget and stream */
1342 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1343 struct snd_soc_dapm_widget *widget, int stream)
1345 struct snd_soc_pcm_runtime *be;
1346 struct snd_soc_dapm_widget *w;
1347 struct snd_soc_dai *dai;
1350 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1352 for_each_card_rtds(card, be) {
1354 if (!be->dai_link->no_pcm)
1357 if (!snd_soc_dpcm_get_substream(be, stream))
1360 for_each_rtd_dais(be, i, dai) {
1361 w = snd_soc_dai_get_widget(dai, stream);
1363 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1364 w ? w->name : "(not set)");
1371 /* Widget provided is not a BE */
1375 int widget_in_list(struct snd_soc_dapm_widget_list *list,
1376 struct snd_soc_dapm_widget *widget)
1378 struct snd_soc_dapm_widget *w;
1381 for_each_dapm_widgets(list, i, w)
1387 EXPORT_SYMBOL_GPL(widget_in_list);
1389 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1391 struct snd_soc_card *card = widget->dapm->card;
1392 struct snd_soc_pcm_runtime *rtd;
1395 /* adjust dir to stream */
1396 if (dir == SND_SOC_DAPM_DIR_OUT)
1397 stream = SNDRV_PCM_STREAM_PLAYBACK;
1399 stream = SNDRV_PCM_STREAM_CAPTURE;
1401 rtd = dpcm_get_be(card, widget, stream);
1407 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1409 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1410 int stream, struct snd_soc_dapm_widget_list **list)
1412 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0);
1415 if (fe->dai_link->num_cpus > 1) {
1417 "%s doesn't support Multi CPU yet\n", __func__);
1421 /* get number of valid DAI paths and their widgets */
1422 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1423 fe->card->component_chaining ?
1424 NULL : dpcm_end_walk_at_be);
1427 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1428 stream ? "capture" : "playback");
1429 else if (paths == 0)
1430 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1431 stream ? "capture" : "playback");
1436 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1438 snd_soc_dapm_dai_free_widgets(list);
1441 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1442 struct snd_soc_dapm_widget_list *list)
1444 struct snd_soc_dai *dai;
1447 /* is there a valid DAI widget for this BE */
1448 for_each_rtd_dais(dpcm->be, i, dai) {
1449 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1452 * The BE is pruned only if none of the dai
1453 * widgets are in the active list.
1455 if (widget && widget_in_list(list, widget))
1462 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1463 struct snd_soc_dapm_widget_list **list_)
1465 struct snd_soc_dpcm *dpcm;
1468 /* Destroy any old FE <--> BE connections */
1469 for_each_dpcm_be(fe, stream, dpcm) {
1470 if (dpcm_be_is_active(dpcm, stream, *list_))
1473 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1474 stream ? "capture" : "playback",
1475 dpcm->be->dai_link->name, fe->dai_link->name);
1476 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1477 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1481 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1485 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1486 struct snd_soc_dapm_widget_list **list_)
1488 struct snd_soc_card *card = fe->card;
1489 struct snd_soc_dapm_widget_list *list = *list_;
1490 struct snd_soc_pcm_runtime *be;
1491 struct snd_soc_dapm_widget *widget;
1492 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1493 int i, new = 0, err;
1495 /* don't connect if FE is not running */
1496 if (!fe_substream->runtime && !fe->fe_compr)
1499 /* Create any new FE <--> BE connections */
1500 for_each_dapm_widgets(list, i, widget) {
1502 switch (widget->id) {
1503 case snd_soc_dapm_dai_in:
1504 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1507 case snd_soc_dapm_dai_out:
1508 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1515 /* is there a valid BE rtd for this widget */
1516 be = dpcm_get_be(card, widget, stream);
1518 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1524 * Filter for systems with 'component_chaining' enabled.
1525 * This helps to avoid unnecessary re-configuration of an
1526 * already active BE on such systems.
1528 if (fe->card->component_chaining &&
1529 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1530 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1533 /* newly connected FE and BE */
1534 err = dpcm_be_connect(fe, be, stream);
1536 dev_err(fe->dev, "ASoC: can't connect %s\n",
1539 } else if (err == 0) /* already connected */
1543 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1547 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1552 * Find the corresponding BE DAIs that source or sink audio to this
1555 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1556 int stream, struct snd_soc_dapm_widget_list **list, int new)
1559 return dpcm_add_paths(fe, stream, list);
1561 return dpcm_prune_paths(fe, stream, list);
1564 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1566 struct snd_soc_dpcm *dpcm;
1568 for_each_dpcm_be(fe, stream, dpcm)
1569 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1572 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1573 int do_hw_free, struct snd_soc_dpcm *last)
1575 struct snd_soc_dpcm *dpcm;
1577 /* disable any enabled and non active backends */
1578 for_each_dpcm_be(fe, stream, dpcm) {
1579 struct snd_soc_pcm_runtime *be = dpcm->be;
1580 struct snd_pcm_substream *be_substream =
1581 snd_soc_dpcm_get_substream(be, stream);
1586 /* is this op for this BE ? */
1587 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1590 if (be->dpcm[stream].users == 0) {
1591 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1592 stream ? "capture" : "playback",
1593 be->dpcm[stream].state);
1597 if (--be->dpcm[stream].users != 0)
1600 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1604 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1605 __soc_pcm_hw_free(be, be_substream);
1606 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1610 __soc_pcm_close(be, be_substream);
1611 be_substream->runtime = NULL;
1612 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1616 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1618 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1619 struct snd_soc_pcm_runtime *be;
1620 struct snd_soc_dpcm *dpcm;
1623 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1624 for_each_dpcm_be(fe, stream, dpcm) {
1625 struct snd_pcm_substream *be_substream;
1628 be_substream = snd_soc_dpcm_get_substream(be, stream);
1630 if (!be_substream) {
1631 dev_err(be->dev, "ASoC: no backend %s stream\n",
1632 stream ? "capture" : "playback");
1636 /* is this op for this BE ? */
1637 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1640 /* first time the dpcm is open ? */
1641 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1642 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1643 stream ? "capture" : "playback",
1644 be->dpcm[stream].state);
1648 if (be->dpcm[stream].users++ != 0)
1651 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1652 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1655 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1656 stream ? "capture" : "playback", be->dai_link->name);
1658 be_substream->runtime = fe_substream->runtime;
1659 err = __soc_pcm_open(be, be_substream);
1661 be->dpcm[stream].users--;
1662 if (be->dpcm[stream].users < 0)
1663 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1664 stream ? "capture" : "playback",
1665 be->dpcm[stream].state);
1667 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1670 be->dpcm[stream].be_start = 0;
1671 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1678 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1680 return soc_pcm_ret(fe, err);
1683 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1685 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1686 struct snd_pcm_runtime *runtime = substream->runtime;
1687 struct snd_pcm_hardware *hw = &runtime->hw;
1688 struct snd_soc_dai *dai;
1689 int stream = substream->stream;
1690 u64 formats = hw->formats;
1693 soc_pcm_hw_init(hw);
1696 hw->formats &= formats;
1698 for_each_rtd_cpu_dais(fe, i, dai) {
1699 struct snd_soc_pcm_stream *cpu_stream;
1702 * Skip CPUs which don't support the current stream
1703 * type. See soc_pcm_init_runtime_hw() for more details
1705 if (!snd_soc_dai_stream_valid(dai, stream))
1708 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1710 soc_pcm_hw_update_rate(hw, cpu_stream);
1711 soc_pcm_hw_update_chan(hw, cpu_stream);
1712 soc_pcm_hw_update_format(hw, cpu_stream);
1717 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1719 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1720 struct snd_pcm_runtime *runtime = substream->runtime;
1721 struct snd_pcm_hardware *hw = &runtime->hw;
1722 struct snd_soc_dpcm *dpcm;
1723 struct snd_soc_dai *dai;
1724 int stream = substream->stream;
1726 if (!fe->dai_link->dpcm_merged_format)
1730 * It returns merged BE codec format
1731 * if FE want to use it (= dpcm_merged_format)
1734 for_each_dpcm_be(fe, stream, dpcm) {
1735 struct snd_soc_pcm_runtime *be = dpcm->be;
1736 struct snd_soc_pcm_stream *codec_stream;
1739 for_each_rtd_codec_dais(be, i, dai) {
1741 * Skip CODECs which don't support the current stream
1742 * type. See soc_pcm_init_runtime_hw() for more details
1744 if (!snd_soc_dai_stream_valid(dai, stream))
1747 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1749 soc_pcm_hw_update_format(hw, codec_stream);
1754 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1756 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1757 struct snd_pcm_runtime *runtime = substream->runtime;
1758 struct snd_pcm_hardware *hw = &runtime->hw;
1759 struct snd_soc_dpcm *dpcm;
1760 int stream = substream->stream;
1762 if (!fe->dai_link->dpcm_merged_chan)
1766 * It returns merged BE codec channel;
1767 * if FE want to use it (= dpcm_merged_chan)
1770 for_each_dpcm_be(fe, stream, dpcm) {
1771 struct snd_soc_pcm_runtime *be = dpcm->be;
1772 struct snd_soc_pcm_stream *cpu_stream;
1773 struct snd_soc_dai *dai;
1776 for_each_rtd_cpu_dais(be, i, dai) {
1778 * Skip CPUs which don't support the current stream
1779 * type. See soc_pcm_init_runtime_hw() for more details
1781 if (!snd_soc_dai_stream_valid(dai, stream))
1784 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1786 soc_pcm_hw_update_chan(hw, cpu_stream);
1790 * chan min/max cannot be enforced if there are multiple CODEC
1791 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1793 if (be->dai_link->num_codecs == 1) {
1794 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1795 snd_soc_rtd_to_codec(be, 0), stream);
1797 soc_pcm_hw_update_chan(hw, codec_stream);
1802 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1804 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1805 struct snd_pcm_runtime *runtime = substream->runtime;
1806 struct snd_pcm_hardware *hw = &runtime->hw;
1807 struct snd_soc_dpcm *dpcm;
1808 int stream = substream->stream;
1810 if (!fe->dai_link->dpcm_merged_rate)
1814 * It returns merged BE codec channel;
1815 * if FE want to use it (= dpcm_merged_chan)
1818 for_each_dpcm_be(fe, stream, dpcm) {
1819 struct snd_soc_pcm_runtime *be = dpcm->be;
1820 struct snd_soc_pcm_stream *pcm;
1821 struct snd_soc_dai *dai;
1824 for_each_rtd_dais(be, i, dai) {
1826 * Skip DAIs which don't support the current stream
1827 * type. See soc_pcm_init_runtime_hw() for more details
1829 if (!snd_soc_dai_stream_valid(dai, stream))
1832 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1834 soc_pcm_hw_update_rate(hw, pcm);
1839 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1842 struct snd_soc_dpcm *dpcm;
1843 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1844 struct snd_soc_dai *fe_cpu_dai;
1848 /* apply symmetry for FE */
1849 soc_pcm_update_symmetry(fe_substream);
1851 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1852 /* Symmetry only applies if we've got an active stream. */
1853 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1858 /* apply symmetry for BE */
1859 for_each_dpcm_be(fe, stream, dpcm) {
1860 struct snd_soc_pcm_runtime *be = dpcm->be;
1861 struct snd_pcm_substream *be_substream =
1862 snd_soc_dpcm_get_substream(be, stream);
1863 struct snd_soc_pcm_runtime *rtd;
1864 struct snd_soc_dai *dai;
1866 /* A backend may not have the requested substream */
1870 rtd = snd_soc_substream_to_rtd(be_substream);
1871 if (rtd->dai_link->be_hw_params_fixup)
1874 soc_pcm_update_symmetry(be_substream);
1876 /* Symmetry only applies if we've got an active stream. */
1877 for_each_rtd_dais(rtd, i, dai) {
1878 err = soc_pcm_apply_symmetry(fe_substream, dai);
1884 return soc_pcm_ret(fe, err);
1887 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1889 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1890 int stream = fe_substream->stream, ret = 0;
1892 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1894 ret = dpcm_be_dai_startup(fe, stream);
1898 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1900 /* start the DAI frontend */
1901 ret = __soc_pcm_open(fe, fe_substream);
1905 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1907 dpcm_runtime_setup_fe(fe_substream);
1909 dpcm_runtime_setup_be_format(fe_substream);
1910 dpcm_runtime_setup_be_chan(fe_substream);
1911 dpcm_runtime_setup_be_rate(fe_substream);
1913 ret = dpcm_apply_symmetry(fe_substream, stream);
1917 dpcm_be_dai_startup_unwind(fe, stream);
1919 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1921 return soc_pcm_ret(fe, ret);
1924 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1926 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1927 int stream = substream->stream;
1929 snd_soc_dpcm_mutex_assert_held(fe);
1931 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1933 /* shutdown the BEs */
1934 dpcm_be_dai_shutdown(fe, stream);
1936 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1938 /* now shutdown the frontend */
1939 __soc_pcm_close(fe, substream);
1941 /* run the stream stop event */
1942 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1944 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1945 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1949 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1951 struct snd_soc_dpcm *dpcm;
1953 /* only hw_params backends that are either sinks or sources
1954 * to this frontend DAI */
1955 for_each_dpcm_be(fe, stream, dpcm) {
1957 struct snd_soc_pcm_runtime *be = dpcm->be;
1958 struct snd_pcm_substream *be_substream =
1959 snd_soc_dpcm_get_substream(be, stream);
1961 /* is this op for this BE ? */
1962 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1965 /* only free hw when no longer used - check all FEs */
1966 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1969 /* do not free hw if this BE is used by other FE */
1970 if (be->dpcm[stream].users > 1)
1973 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1974 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1975 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1976 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1977 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1978 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1981 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1982 be->dai_link->name);
1984 __soc_pcm_hw_free(be, be_substream);
1986 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1990 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1992 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1993 int stream = substream->stream;
1995 snd_soc_dpcm_mutex_lock(fe);
1996 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1998 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2000 /* call hw_free on the frontend */
2001 soc_pcm_hw_clean(fe, substream, 0);
2003 /* only hw_params backends that are either sinks or sources
2004 * to this frontend DAI */
2005 dpcm_be_dai_hw_free(fe, stream);
2007 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2008 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2010 snd_soc_dpcm_mutex_unlock(fe);
2014 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2016 struct snd_soc_pcm_runtime *be;
2017 struct snd_pcm_substream *be_substream;
2018 struct snd_soc_dpcm *dpcm;
2021 for_each_dpcm_be(fe, stream, dpcm) {
2022 struct snd_pcm_hw_params hw_params;
2025 be_substream = snd_soc_dpcm_get_substream(be, stream);
2027 /* is this op for this BE ? */
2028 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2031 /* copy params for each dpcm */
2032 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
2033 sizeof(struct snd_pcm_hw_params));
2035 /* perform any hw_params fixups */
2036 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2040 /* copy the fixed-up hw params for BE dai */
2041 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2042 sizeof(struct snd_pcm_hw_params));
2044 /* only allow hw_params() if no connected FEs are running */
2045 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2048 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2049 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2050 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2053 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2054 be->dai_link->name);
2056 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2060 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2065 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2066 __func__, be->dai_link->name, ret);
2068 /* disable any enabled and non active backends */
2069 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2071 be_substream = snd_soc_dpcm_get_substream(be, stream);
2073 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2076 /* only allow hw_free() if no connected FEs are running */
2077 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2080 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2081 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2082 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2083 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2086 __soc_pcm_hw_free(be, be_substream);
2092 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2093 struct snd_pcm_hw_params *params)
2095 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2096 int ret, stream = substream->stream;
2098 snd_soc_dpcm_mutex_lock(fe);
2099 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2101 memcpy(&fe->dpcm[stream].hw_params, params,
2102 sizeof(struct snd_pcm_hw_params));
2103 ret = dpcm_be_dai_hw_params(fe, stream);
2107 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2108 fe->dai_link->name, params_rate(params),
2109 params_channels(params), params_format(params));
2111 /* call hw_params on the frontend */
2112 ret = __soc_pcm_hw_params(fe, substream, params);
2114 dpcm_be_dai_hw_free(fe, stream);
2116 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2119 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2120 snd_soc_dpcm_mutex_unlock(fe);
2122 return soc_pcm_ret(fe, ret);
2125 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2128 struct snd_soc_pcm_runtime *be;
2129 bool pause_stop_transition;
2130 struct snd_soc_dpcm *dpcm;
2131 unsigned long flags;
2134 for_each_dpcm_be(fe, stream, dpcm) {
2135 struct snd_pcm_substream *be_substream;
2138 be_substream = snd_soc_dpcm_get_substream(be, stream);
2140 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2142 /* is this op for this BE ? */
2143 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2146 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2147 be->dai_link->name, cmd);
2150 case SNDRV_PCM_TRIGGER_START:
2151 if (!be->dpcm[stream].be_start &&
2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2153 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2154 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2157 be->dpcm[stream].be_start++;
2158 if (be->dpcm[stream].be_start != 1)
2161 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2162 ret = soc_pcm_trigger(be_substream,
2163 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2165 ret = soc_pcm_trigger(be_substream,
2166 SNDRV_PCM_TRIGGER_START);
2168 be->dpcm[stream].be_start--;
2172 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2174 case SNDRV_PCM_TRIGGER_RESUME:
2175 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2178 be->dpcm[stream].be_start++;
2179 if (be->dpcm[stream].be_start != 1)
2182 ret = soc_pcm_trigger(be_substream, cmd);
2184 be->dpcm[stream].be_start--;
2188 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2190 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2191 if (!be->dpcm[stream].be_start &&
2192 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2193 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2196 fe->dpcm[stream].fe_pause = false;
2197 be->dpcm[stream].be_pause--;
2199 be->dpcm[stream].be_start++;
2200 if (be->dpcm[stream].be_start != 1)
2203 ret = soc_pcm_trigger(be_substream, cmd);
2205 be->dpcm[stream].be_start--;
2209 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2211 case SNDRV_PCM_TRIGGER_STOP:
2212 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2213 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2216 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2217 be->dpcm[stream].be_start--;
2219 if (be->dpcm[stream].be_start != 0)
2222 pause_stop_transition = false;
2223 if (fe->dpcm[stream].fe_pause) {
2224 pause_stop_transition = true;
2225 fe->dpcm[stream].fe_pause = false;
2226 be->dpcm[stream].be_pause--;
2229 if (be->dpcm[stream].be_pause != 0)
2230 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2232 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2235 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2236 be->dpcm[stream].be_start++;
2237 if (pause_stop_transition) {
2238 fe->dpcm[stream].fe_pause = true;
2239 be->dpcm[stream].be_pause++;
2244 if (be->dpcm[stream].be_pause != 0)
2245 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2247 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2250 case SNDRV_PCM_TRIGGER_SUSPEND:
2251 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2254 be->dpcm[stream].be_start--;
2255 if (be->dpcm[stream].be_start != 0)
2258 ret = soc_pcm_trigger(be_substream, cmd);
2260 be->dpcm[stream].be_start++;
2264 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2266 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2267 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2270 fe->dpcm[stream].fe_pause = true;
2271 be->dpcm[stream].be_pause++;
2273 be->dpcm[stream].be_start--;
2274 if (be->dpcm[stream].be_start != 0)
2277 ret = soc_pcm_trigger(be_substream, cmd);
2279 be->dpcm[stream].be_start++;
2283 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2287 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2291 return soc_pcm_ret(fe, ret);
2293 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2295 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2296 int cmd, bool fe_first)
2298 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2301 /* call trigger on the frontend before the backend. */
2303 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2304 fe->dai_link->name, cmd);
2306 ret = soc_pcm_trigger(substream, cmd);
2310 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2314 /* call trigger on the frontend after the backend. */
2315 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2319 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2320 fe->dai_link->name, cmd);
2322 ret = soc_pcm_trigger(substream, cmd);
2327 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2329 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2330 int stream = substream->stream;
2332 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2334 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2337 case SND_SOC_DPCM_TRIGGER_PRE:
2339 case SNDRV_PCM_TRIGGER_START:
2340 case SNDRV_PCM_TRIGGER_RESUME:
2341 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2342 case SNDRV_PCM_TRIGGER_DRAIN:
2343 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2345 case SNDRV_PCM_TRIGGER_STOP:
2346 case SNDRV_PCM_TRIGGER_SUSPEND:
2347 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2348 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2355 case SND_SOC_DPCM_TRIGGER_POST:
2357 case SNDRV_PCM_TRIGGER_START:
2358 case SNDRV_PCM_TRIGGER_RESUME:
2359 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2360 case SNDRV_PCM_TRIGGER_DRAIN:
2361 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2363 case SNDRV_PCM_TRIGGER_STOP:
2364 case SNDRV_PCM_TRIGGER_SUSPEND:
2365 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2366 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2373 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2374 /* bespoke trigger() - handles both FE and BEs */
2376 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2377 fe->dai_link->name, cmd);
2379 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2382 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2383 fe->dai_link->name);
2389 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2395 case SNDRV_PCM_TRIGGER_START:
2396 case SNDRV_PCM_TRIGGER_RESUME:
2397 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2398 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2400 case SNDRV_PCM_TRIGGER_STOP:
2401 case SNDRV_PCM_TRIGGER_SUSPEND:
2402 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2404 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2405 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2410 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2414 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2416 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2417 int stream = substream->stream;
2419 /* if FE's runtime_update is already set, we're in race;
2420 * process this trigger later at exit
2422 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2423 fe->dpcm[stream].trigger_pending = cmd + 1;
2424 return 0; /* delayed, assuming it's successful */
2427 /* we're alone, let's trigger */
2428 return dpcm_fe_dai_do_trigger(substream, cmd);
2431 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2433 struct snd_soc_dpcm *dpcm;
2436 for_each_dpcm_be(fe, stream, dpcm) {
2438 struct snd_soc_pcm_runtime *be = dpcm->be;
2439 struct snd_pcm_substream *be_substream =
2440 snd_soc_dpcm_get_substream(be, stream);
2442 /* is this op for this BE ? */
2443 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2446 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2449 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2450 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2451 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2452 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2455 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2456 be->dai_link->name);
2458 ret = __soc_pcm_prepare(be, be_substream);
2462 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2465 return soc_pcm_ret(fe, ret);
2468 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2470 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2471 int stream = substream->stream, ret = 0;
2473 snd_soc_dpcm_mutex_lock(fe);
2475 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2477 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2479 /* there is no point preparing this FE if there are no BEs */
2480 if (list_empty(&fe->dpcm[stream].be_clients)) {
2481 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2482 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2483 fe->dai_link->name);
2484 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2485 fe->dai_link->name);
2490 ret = dpcm_be_dai_prepare(fe, stream);
2494 /* call prepare on the frontend */
2495 ret = __soc_pcm_prepare(fe, substream);
2499 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2502 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2503 snd_soc_dpcm_mutex_unlock(fe);
2505 return soc_pcm_ret(fe, ret);
2508 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2510 struct snd_pcm_substream *substream =
2511 snd_soc_dpcm_get_substream(fe, stream);
2512 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2515 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2516 stream ? "capture" : "playback", fe->dai_link->name);
2518 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2519 /* call bespoke trigger - FE takes care of all BE triggers */
2520 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2521 fe->dai_link->name);
2523 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2525 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2526 fe->dai_link->name);
2528 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2531 dpcm_be_dai_hw_free(fe, stream);
2533 dpcm_be_dai_shutdown(fe, stream);
2535 /* run the stream event for each BE */
2536 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2538 return soc_pcm_ret(fe, err);
2541 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2543 struct snd_pcm_substream *substream =
2544 snd_soc_dpcm_get_substream(fe, stream);
2545 struct snd_soc_dpcm *dpcm;
2546 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2549 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2550 stream ? "capture" : "playback", fe->dai_link->name);
2552 /* Only start the BE if the FE is ready */
2553 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2554 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2555 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2556 fe->dai_link->name, fe->dpcm[stream].state);
2561 /* startup must always be called for new BEs */
2562 ret = dpcm_be_dai_startup(fe, stream);
2566 /* keep going if FE state is > open */
2567 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2570 ret = dpcm_be_dai_hw_params(fe, stream);
2574 /* keep going if FE state is > hw_params */
2575 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2578 ret = dpcm_be_dai_prepare(fe, stream);
2582 /* run the stream event for each BE */
2583 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2585 /* keep going if FE state is > prepare */
2586 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2587 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2590 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2591 /* call trigger on the frontend - FE takes care of all BE triggers */
2592 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2593 fe->dai_link->name);
2595 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2599 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2600 fe->dai_link->name);
2602 ret = dpcm_be_dai_trigger(fe, stream,
2603 SNDRV_PCM_TRIGGER_START);
2611 dpcm_be_dai_hw_free(fe, stream);
2613 dpcm_be_dai_shutdown(fe, stream);
2615 /* disconnect any pending BEs */
2616 for_each_dpcm_be(fe, stream, dpcm) {
2617 struct snd_soc_pcm_runtime *be = dpcm->be;
2619 /* is this op for this BE ? */
2620 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2623 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2624 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2625 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2628 return soc_pcm_ret(fe, ret);
2631 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2633 struct snd_soc_dapm_widget_list *list;
2637 if (!fe->dai_link->dynamic)
2640 if (fe->dai_link->num_cpus > 1) {
2642 "%s doesn't support Multi CPU yet\n", __func__);
2646 /* only check active links */
2647 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0)))
2650 /* DAPM sync will call this to update DSP paths */
2651 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2652 new ? "new" : "old", fe->dai_link->name);
2654 for_each_pcm_streams(stream) {
2656 /* skip if FE doesn't have playback/capture capability */
2657 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2658 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream))
2661 /* skip if FE isn't currently playing/capturing */
2662 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2663 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream))
2666 paths = dpcm_path_get(fe, stream, &list);
2670 /* update any playback/capture paths */
2671 count = dpcm_process_paths(fe, stream, &list, new);
2673 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2675 dpcm_run_update_startup(fe, stream);
2677 dpcm_run_update_shutdown(fe, stream);
2678 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2680 dpcm_clear_pending_state(fe, stream);
2681 dpcm_be_disconnect(fe, stream);
2684 dpcm_path_put(&list);
2690 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2693 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2695 struct snd_soc_pcm_runtime *fe;
2698 snd_soc_dpcm_mutex_lock(card);
2699 /* shutdown all old paths first */
2700 for_each_card_rtds(card, fe) {
2701 ret = soc_dpcm_fe_runtime_update(fe, 0);
2706 /* bring new paths up */
2707 for_each_card_rtds(card, fe) {
2708 ret = soc_dpcm_fe_runtime_update(fe, 1);
2714 snd_soc_dpcm_mutex_unlock(card);
2717 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2719 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2721 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2722 struct snd_soc_dpcm *dpcm;
2723 int stream = fe_substream->stream;
2725 snd_soc_dpcm_mutex_assert_held(fe);
2727 /* mark FE's links ready to prune */
2728 for_each_dpcm_be(fe, stream, dpcm)
2729 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2731 dpcm_be_disconnect(fe, stream);
2734 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2736 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2739 snd_soc_dpcm_mutex_lock(fe);
2740 ret = dpcm_fe_dai_shutdown(fe_substream);
2742 dpcm_fe_dai_cleanup(fe_substream);
2744 snd_soc_dpcm_mutex_unlock(fe);
2748 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2750 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2751 struct snd_soc_dapm_widget_list *list;
2753 int stream = fe_substream->stream;
2755 snd_soc_dpcm_mutex_lock(fe);
2757 ret = dpcm_path_get(fe, stream, &list);
2761 /* calculate valid and active FE <-> BE dpcms */
2762 dpcm_process_paths(fe, stream, &list, 1);
2764 ret = dpcm_fe_dai_startup(fe_substream);
2766 dpcm_fe_dai_cleanup(fe_substream);
2768 dpcm_clear_pending_state(fe, stream);
2769 dpcm_path_put(&list);
2771 snd_soc_dpcm_mutex_unlock(fe);
2775 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2776 int *playback, int *capture)
2778 struct snd_soc_dai_link *dai_link = rtd->dai_link;
2779 struct snd_soc_dai *cpu_dai;
2780 int has_playback = 0;
2781 int has_capture = 0;
2784 if (dai_link->dynamic && dai_link->num_cpus > 1) {
2785 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2789 if (dai_link->dynamic || dai_link->no_pcm) {
2792 if (dai_link->dpcm_playback) {
2793 stream = SNDRV_PCM_STREAM_PLAYBACK;
2795 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2796 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2801 if (!has_playback) {
2802 dev_err(rtd->card->dev,
2803 "No CPU DAIs support playback for stream %s\n",
2804 dai_link->stream_name);
2808 if (dai_link->dpcm_capture) {
2809 stream = SNDRV_PCM_STREAM_CAPTURE;
2811 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2812 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2819 dev_err(rtd->card->dev,
2820 "No CPU DAIs support capture for stream %s\n",
2821 dai_link->stream_name);
2826 struct snd_soc_dai *codec_dai;
2828 /* Adapt stream for codec2codec links */
2829 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2830 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
2832 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2833 if (dai_link->num_cpus == 1) {
2834 cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
2835 } else if (dai_link->num_cpus == dai_link->num_codecs) {
2836 cpu_dai = snd_soc_rtd_to_cpu(rtd, i);
2837 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
2840 if (!rtd->dai_link->codec_ch_maps) {
2841 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
2846 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
2847 cpu_dai = snd_soc_rtd_to_cpu(rtd, cpu_id);
2849 dev_err(rtd->card->dev,
2850 "%s codec number %d < cpu number %d is not supported\n",
2851 __func__, rtd->dai_link->num_codecs,
2852 rtd->dai_link->num_cpus);
2856 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2857 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2859 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2860 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2865 if (dai_link->playback_only)
2868 if (dai_link->capture_only)
2871 if (!has_playback && !has_capture) {
2872 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
2873 dai_link->stream_name);
2878 *playback = has_playback;
2879 *capture = has_capture;
2884 static int soc_create_pcm(struct snd_pcm **pcm,
2885 struct snd_soc_pcm_runtime *rtd,
2886 int playback, int capture, int num)
2891 /* create the PCM */
2892 if (rtd->dai_link->c2c_params) {
2893 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2894 rtd->dai_link->stream_name);
2896 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2897 playback, capture, pcm);
2898 } else if (rtd->dai_link->no_pcm) {
2899 snprintf(new_name, sizeof(new_name), "(%s)",
2900 rtd->dai_link->stream_name);
2902 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2903 playback, capture, pcm);
2905 if (rtd->dai_link->dynamic)
2906 snprintf(new_name, sizeof(new_name), "%s (*)",
2907 rtd->dai_link->stream_name);
2909 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2910 rtd->dai_link->stream_name,
2911 soc_codec_dai_name(rtd), num);
2913 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2917 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2918 new_name, rtd->dai_link->name, ret);
2921 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2926 /* create a new pcm */
2927 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2929 struct snd_soc_component *component;
2930 struct snd_pcm *pcm;
2931 int ret = 0, playback = 0, capture = 0;
2934 ret = soc_get_playback_capture(rtd, &playback, &capture);
2938 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2942 /* DAPM dai link stream work */
2944 * Currently nothing to do for c2c links
2945 * Since c2c links are internal nodes in the DAPM graph and
2946 * don't interface with the outside world or application layer
2947 * we don't have to do any special handling on close.
2949 if (!rtd->dai_link->c2c_params)
2950 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2953 pcm->nonatomic = rtd->dai_link->nonatomic;
2954 pcm->private_data = rtd;
2955 pcm->no_device_suspend = true;
2957 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2959 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2961 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2965 /* ASoC PCM operations */
2966 if (rtd->dai_link->dynamic) {
2967 rtd->ops.open = dpcm_fe_dai_open;
2968 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2969 rtd->ops.prepare = dpcm_fe_dai_prepare;
2970 rtd->ops.trigger = dpcm_fe_dai_trigger;
2971 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2972 rtd->ops.close = dpcm_fe_dai_close;
2973 rtd->ops.pointer = soc_pcm_pointer;
2975 rtd->ops.open = soc_pcm_open;
2976 rtd->ops.hw_params = soc_pcm_hw_params;
2977 rtd->ops.prepare = soc_pcm_prepare;
2978 rtd->ops.trigger = soc_pcm_trigger;
2979 rtd->ops.hw_free = soc_pcm_hw_free;
2980 rtd->ops.close = soc_pcm_close;
2981 rtd->ops.pointer = soc_pcm_pointer;
2984 for_each_rtd_components(rtd, i, component) {
2985 const struct snd_soc_component_driver *drv = component->driver;
2988 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2990 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2992 rtd->ops.copy = snd_soc_pcm_component_copy;
2994 rtd->ops.page = snd_soc_pcm_component_page;
2996 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2998 rtd->ops.ack = snd_soc_pcm_component_ack;
3002 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3005 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3007 ret = snd_soc_pcm_component_new(rtd);
3011 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
3012 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
3016 /* is the current PCM operation for this FE ? */
3017 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3019 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3023 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3025 /* is the current PCM operation for this BE ? */
3026 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3027 struct snd_soc_pcm_runtime *be, int stream)
3029 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3030 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3031 be->dpcm[stream].runtime_update))
3035 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3037 /* get the substream for this BE */
3038 struct snd_pcm_substream *
3039 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3041 return be->pcm->streams[stream].substream;
3043 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3045 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3046 struct snd_soc_pcm_runtime *be,
3048 const enum snd_soc_dpcm_state *states,
3051 struct snd_soc_dpcm *dpcm;
3056 for_each_dpcm_fe(be, stream, dpcm) {
3061 state = dpcm->fe->dpcm[stream].state;
3062 for (i = 0; i < num_states; i++) {
3063 if (state == states[i]) {
3070 /* it's safe to do this BE DAI */
3075 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3076 * are not running, paused or suspended for the specified stream direction.
3078 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3079 struct snd_soc_pcm_runtime *be, int stream)
3081 const enum snd_soc_dpcm_state state[] = {
3082 SND_SOC_DPCM_STATE_START,
3083 SND_SOC_DPCM_STATE_PAUSED,
3084 SND_SOC_DPCM_STATE_SUSPEND,
3087 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3089 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3092 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3093 * running, paused or suspended for the specified stream direction.
3095 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3096 struct snd_soc_pcm_runtime *be, int stream)
3098 const enum snd_soc_dpcm_state state[] = {
3099 SND_SOC_DPCM_STATE_START,
3100 SND_SOC_DPCM_STATE_PAUSED,
3101 SND_SOC_DPCM_STATE_SUSPEND,
3102 SND_SOC_DPCM_STATE_PREPARE,
3105 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3107 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3110 * We can only prepare a BE DAI if any of it's FE are not prepared,
3111 * running or paused for the specified stream direction.
3113 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3114 struct snd_soc_pcm_runtime *be, int stream)
3116 const enum snd_soc_dpcm_state state[] = {
3117 SND_SOC_DPCM_STATE_START,
3118 SND_SOC_DPCM_STATE_PAUSED,
3119 SND_SOC_DPCM_STATE_PREPARE,
3122 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3124 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);