1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-pcm.c -- ALSA SoC PCM
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/soc-link.h>
28 #include <sound/initval.h>
30 #define DPCM_MAX_BE_USERS 8
32 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
34 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
36 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
38 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
41 #ifdef CONFIG_DEBUG_FS
42 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
45 case SND_SOC_DPCM_STATE_NEW:
47 case SND_SOC_DPCM_STATE_OPEN:
49 case SND_SOC_DPCM_STATE_HW_PARAMS:
51 case SND_SOC_DPCM_STATE_PREPARE:
53 case SND_SOC_DPCM_STATE_START:
55 case SND_SOC_DPCM_STATE_STOP:
57 case SND_SOC_DPCM_STATE_SUSPEND:
59 case SND_SOC_DPCM_STATE_PAUSED:
61 case SND_SOC_DPCM_STATE_HW_FREE:
63 case SND_SOC_DPCM_STATE_CLOSE:
70 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
71 int stream, char *buf, size_t size)
73 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
74 struct snd_soc_dpcm *dpcm;
79 offset += scnprintf(buf + offset, size - offset,
80 "[%s - %s]\n", fe->dai_link->name,
81 stream ? "Capture" : "Playback");
83 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
84 dpcm_state_string(fe->dpcm[stream].state));
86 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
87 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
88 offset += scnprintf(buf + offset, size - offset,
90 "Format = %s, Channels = %d, Rate = %d\n",
91 snd_pcm_format_name(params_format(params)),
92 params_channels(params),
96 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
98 if (list_empty(&fe->dpcm[stream].be_clients)) {
99 offset += scnprintf(buf + offset, size - offset,
100 " No active DSP links\n");
104 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
105 for_each_dpcm_be(fe, stream, dpcm) {
106 struct snd_soc_pcm_runtime *be = dpcm->be;
107 params = &dpcm->hw_params;
109 offset += scnprintf(buf + offset, size - offset,
110 "- %s\n", be->dai_link->name);
112 offset += scnprintf(buf + offset, size - offset,
114 dpcm_state_string(be->dpcm[stream].state));
116 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
117 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
118 offset += scnprintf(buf + offset, size - offset,
120 "Format = %s, Channels = %d, Rate = %d\n",
121 snd_pcm_format_name(params_format(params)),
122 params_channels(params),
123 params_rate(params));
125 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
130 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
131 size_t count, loff_t *ppos)
133 struct snd_soc_pcm_runtime *fe = file->private_data;
134 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
138 if (fe->num_cpus > 1) {
140 "%s doesn't support Multi CPU yet\n", __func__);
144 buf = kmalloc(out_count, GFP_KERNEL);
148 for_each_pcm_streams(stream)
149 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
150 offset += dpcm_show_state(fe, stream,
154 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
160 static const struct file_operations dpcm_state_fops = {
162 .read = dpcm_state_read_file,
163 .llseek = default_llseek,
166 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
168 if (!rtd->dai_link->dynamic)
171 if (!rtd->card->debugfs_card_root)
174 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
175 rtd->card->debugfs_card_root);
177 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
178 rtd, &dpcm_state_fops);
181 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
185 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
186 stream ? "capture" : "playback");
188 dpcm->debugfs_state = debugfs_create_dir(
189 name, dpcm->fe->debugfs_dpcm_root);
190 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
196 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
198 debugfs_remove_recursive(dpcm->debugfs_state);
202 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
207 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
212 /* Set FE's runtime_update state; the state is protected via PCM stream lock
213 * for avoiding the race with trigger callback.
214 * If the state is unset and a trigger is pending while the previous operation,
215 * process the pending trigger action here.
217 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
218 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
219 int stream, enum snd_soc_dpcm_update state)
221 struct snd_pcm_substream *substream =
222 snd_soc_dpcm_get_substream(fe, stream);
224 snd_pcm_stream_lock_irq(substream);
225 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
226 dpcm_fe_dai_do_trigger(substream,
227 fe->dpcm[stream].trigger_pending - 1);
228 fe->dpcm[stream].trigger_pending = 0;
230 fe->dpcm[stream].runtime_update = state;
231 snd_pcm_stream_unlock_irq(substream);
234 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
235 int stream, enum snd_soc_dpcm_update state)
237 be->dpcm[stream].runtime_update = state;
241 * snd_soc_runtime_action() - Increment/Decrement active count for
242 * PCM runtime components
243 * @rtd: ASoC PCM runtime that is activated
244 * @stream: Direction of the PCM stream
245 * @action: Activate stream if 1. Deactivate if -1.
247 * Increments/Decrements the active count for all the DAIs and components
248 * attached to a PCM runtime.
249 * Should typically be called when a stream is opened.
251 * Must be called with the rtd->card->pcm_mutex being held
253 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
254 int stream, int action)
256 struct snd_soc_dai *dai;
259 lockdep_assert_held(&rtd->card->pcm_mutex);
261 for_each_rtd_dais(rtd, i, dai)
262 snd_soc_dai_action(dai, stream, action);
264 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
267 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
268 * @rtd: The ASoC PCM runtime that should be checked.
270 * This function checks whether the power down delay should be ignored for a
271 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
272 * been configured to ignore the delay, or if none of the components benefits
273 * from having the delay.
275 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
277 struct snd_soc_component *component;
281 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
284 for_each_rtd_components(rtd, i, component)
285 ignore &= !component->driver->use_pmdown_time;
291 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
292 * @substream: the pcm substream
293 * @hw: the hardware parameters
295 * Sets the substream runtime hardware parameters.
297 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
298 const struct snd_pcm_hardware *hw)
300 substream->runtime->hw = *hw;
304 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
306 /* DPCM stream event, send event to FE and all active BEs. */
307 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
310 struct snd_soc_dpcm *dpcm;
312 for_each_dpcm_be(fe, dir, dpcm) {
314 struct snd_soc_pcm_runtime *be = dpcm->be;
316 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
317 be->dai_link->name, event, dir);
319 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
320 (be->dpcm[dir].users >= 1))
323 snd_soc_dapm_stream_event(be, dir, event);
326 snd_soc_dapm_stream_event(fe, dir, event);
331 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
332 struct snd_pcm_hw_params *params)
335 dai->rate = params_rate(params);
336 dai->channels = params_channels(params);
337 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
341 dai->sample_bits = 0;
345 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
346 struct snd_soc_dai *soc_dai)
348 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
351 if (!snd_soc_dai_active(soc_dai))
354 #define __soc_pcm_apply_symmetry(name, NAME) \
355 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
356 rtd->dai_link->symmetric_##name)) { \
357 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
358 #name, soc_dai->name); \
360 ret = snd_pcm_hw_constraint_single(substream->runtime, \
361 SNDRV_PCM_HW_PARAM_##NAME,\
364 dev_err(soc_dai->dev, \
365 "ASoC: Unable to apply %s constraint: %d\n",\
371 __soc_pcm_apply_symmetry(rate, RATE);
372 __soc_pcm_apply_symmetry(channels, CHANNELS);
373 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
378 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
379 struct snd_pcm_hw_params *params)
381 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
382 struct snd_soc_dai d;
383 struct snd_soc_dai *dai;
384 struct snd_soc_dai *cpu_dai;
385 unsigned int symmetry, i;
388 soc_pcm_set_dai_params(&d, params);
390 #define __soc_pcm_params_symmetry(xxx) \
391 symmetry = rtd->dai_link->symmetric_##xxx; \
392 for_each_rtd_dais(rtd, i, dai) \
393 symmetry |= dai->driver->symmetric_##xxx; \
396 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
397 if (!snd_soc_dai_is_dummy(cpu_dai) && \
398 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
399 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
400 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
404 /* reject unmatched parameters when applying symmetry */
405 __soc_pcm_params_symmetry(rate);
406 __soc_pcm_params_symmetry(channels);
407 __soc_pcm_params_symmetry(sample_bits);
412 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
414 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
415 struct snd_soc_dai_link *link = rtd->dai_link;
416 struct snd_soc_dai *dai;
417 unsigned int symmetry, i;
419 symmetry = link->symmetric_rate ||
420 link->symmetric_channels ||
421 link->symmetric_sample_bits;
423 for_each_rtd_dais(rtd, i, dai)
424 symmetry = symmetry ||
425 dai->driver->symmetric_rate ||
426 dai->driver->symmetric_channels ||
427 dai->driver->symmetric_sample_bits;
430 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
433 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
441 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
443 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
447 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
449 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
450 struct snd_soc_dai *cpu_dai;
451 struct snd_soc_dai *codec_dai;
452 int stream = substream->stream;
454 unsigned int bits = 0, cpu_bits = 0;
456 for_each_rtd_codec_dais(rtd, i, codec_dai) {
457 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
459 if (pcm_codec->sig_bits == 0) {
463 bits = max(pcm_codec->sig_bits, bits);
466 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
467 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
469 if (pcm_cpu->sig_bits == 0) {
473 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
476 soc_pcm_set_msb(substream, bits);
477 soc_pcm_set_msb(substream, cpu_bits);
480 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
482 hw->rates = UINT_MAX;
484 hw->rate_max = UINT_MAX;
485 hw->channels_min = 0;
486 hw->channels_max = UINT_MAX;
487 hw->formats = ULLONG_MAX;
490 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
491 struct snd_soc_pcm_stream *p)
493 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
495 /* setup hw->rate_min/max via hw->rates first */
496 snd_pcm_hw_limit_rates(hw);
498 /* update hw->rate_min/max by snd_soc_pcm_stream */
499 hw->rate_min = max(hw->rate_min, p->rate_min);
500 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
503 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
504 struct snd_soc_pcm_stream *p)
506 hw->channels_min = max(hw->channels_min, p->channels_min);
507 hw->channels_max = min(hw->channels_max, p->channels_max);
510 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
511 struct snd_soc_pcm_stream *p)
513 hw->formats &= p->formats;
517 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
518 * @rtd: ASoC PCM runtime
519 * @hw: PCM hardware parameters (output)
520 * @stream: Direction of the PCM stream
522 * Calculates the subset of stream parameters supported by all DAIs
523 * associated with the PCM stream.
525 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
526 struct snd_pcm_hardware *hw, int stream)
528 struct snd_soc_dai *codec_dai;
529 struct snd_soc_dai *cpu_dai;
530 struct snd_soc_pcm_stream *codec_stream;
531 struct snd_soc_pcm_stream *cpu_stream;
532 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
537 /* first calculate min/max only for CPUs in the DAI link */
538 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
541 * Skip CPUs which don't support the current stream type.
542 * Otherwise, since the rate, channel, and format values will
543 * zero in that case, we would have no usable settings left,
544 * causing the resulting setup to fail.
546 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
549 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
551 soc_pcm_hw_update_chan(hw, cpu_stream);
552 soc_pcm_hw_update_rate(hw, cpu_stream);
553 soc_pcm_hw_update_format(hw, cpu_stream);
555 cpu_chan_min = hw->channels_min;
556 cpu_chan_max = hw->channels_max;
558 /* second calculate min/max only for CODECs in the DAI link */
559 for_each_rtd_codec_dais(rtd, i, codec_dai) {
562 * Skip CODECs which don't support the current stream type.
563 * Otherwise, since the rate, channel, and format values will
564 * zero in that case, we would have no usable settings left,
565 * causing the resulting setup to fail.
567 if (!snd_soc_dai_stream_valid(codec_dai, stream))
570 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
572 soc_pcm_hw_update_chan(hw, codec_stream);
573 soc_pcm_hw_update_rate(hw, codec_stream);
574 soc_pcm_hw_update_format(hw, codec_stream);
577 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
578 if (!hw->channels_min)
582 * chan min/max cannot be enforced if there are multiple CODEC DAIs
583 * connected to CPU DAI(s), use CPU DAI's directly and let
584 * channel allocation be fixed up later
586 if (rtd->num_codecs > 1) {
587 hw->channels_min = cpu_chan_min;
588 hw->channels_max = cpu_chan_max;
593 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
595 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
597 struct snd_pcm_hardware *hw = &substream->runtime->hw;
598 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
599 u64 formats = hw->formats;
602 * At least one CPU and one CODEC should match. Otherwise, we should
603 * have bailed out on a higher level, since there would be no CPU or
604 * CODEC to support the transfer direction in that case.
606 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
609 hw->formats &= formats;
612 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
614 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
615 struct snd_soc_component *component;
618 for_each_rtd_components(rtd, i, component) {
619 ret = snd_soc_component_module_get_when_open(component, substream);
623 ret = snd_soc_component_open(component, substream);
631 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
634 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
635 struct snd_soc_component *component;
638 for_each_rtd_components(rtd, i, component) {
639 int r = snd_soc_component_close(component, substream, rollback);
641 ret = r; /* use last ret */
643 snd_soc_component_module_put_when_close(component, substream, rollback);
649 static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback)
651 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
652 struct snd_soc_component *component;
653 struct snd_soc_dai *dai;
656 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
659 snd_soc_runtime_deactivate(rtd, substream->stream);
661 for_each_rtd_dais(rtd, i, dai)
662 snd_soc_dai_shutdown(dai, substream, rollback);
664 snd_soc_link_shutdown(substream, rollback);
666 soc_pcm_components_close(substream, rollback);
669 mutex_unlock(&rtd->card->pcm_mutex);
671 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
673 for_each_rtd_components(rtd, i, component)
674 if (!snd_soc_component_active(component))
675 pinctrl_pm_select_sleep_state(component->dev);
681 * Called by ALSA when a PCM substream is closed. Private data can be
682 * freed here. The cpu DAI, codec DAI, machine and components are also
685 static int soc_pcm_close(struct snd_pcm_substream *substream)
687 return soc_pcm_clean(substream, 0);
690 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
692 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
693 struct snd_pcm_hardware *hw = &substream->runtime->hw;
694 const char *name_cpu = soc_cpu_dai_name(rtd);
695 const char *name_codec = soc_codec_dai_name(rtd);
697 struct device *dev = rtd->dev;
707 err_msg = "channels";
708 if (!hw->channels_min || !hw->channels_max ||
709 hw->channels_min > hw->channels_max)
712 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
714 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
715 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
717 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
723 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
724 name_codec, name_cpu, err_msg);
729 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
730 * then initialized and any private data can be allocated. This also calls
731 * startup for the cpu DAI, component, machine and codec DAI.
733 static int soc_pcm_open(struct snd_pcm_substream *substream)
735 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
736 struct snd_soc_component *component;
737 struct snd_soc_dai *dai;
740 for_each_rtd_components(rtd, i, component)
741 pinctrl_pm_select_default_state(component->dev);
743 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
747 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
749 ret = soc_pcm_components_open(substream);
753 ret = snd_soc_link_startup(substream);
757 /* startup the audio subsystem */
758 for_each_rtd_dais(rtd, i, dai) {
759 ret = snd_soc_dai_startup(dai, substream);
764 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
765 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
768 /* Check that the codec and cpu DAIs are compatible */
769 soc_pcm_init_runtime_hw(substream);
771 soc_pcm_update_symmetry(substream);
773 ret = soc_hw_sanity_check(substream);
777 soc_pcm_apply_msb(substream);
779 /* Symmetry only applies if we've already got an active stream. */
780 for_each_rtd_dais(rtd, i, dai) {
781 ret = soc_pcm_apply_symmetry(substream, dai);
786 snd_soc_runtime_activate(rtd, substream->stream);
789 mutex_unlock(&rtd->card->pcm_mutex);
792 soc_pcm_clean(substream, 1);
793 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret);
799 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
802 * Currently nothing to do for c2c links
803 * Since c2c links are internal nodes in the DAPM graph and
804 * don't interface with the outside world or application layer
805 * we don't have to do any special handling on close.
810 * Called by ALSA when the PCM substream is prepared, can set format, sample
811 * rate, etc. This function is non atomic and can be called multiple times,
812 * it can refer to the runtime info.
814 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
816 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
817 struct snd_soc_dai *dai;
820 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
822 ret = snd_soc_link_prepare(substream);
826 ret = snd_soc_pcm_component_prepare(substream);
830 ret = snd_soc_pcm_dai_prepare(substream);
834 /* cancel any delayed stream shutdown that is pending */
835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
838 cancel_delayed_work(&rtd->delayed_work);
841 snd_soc_dapm_stream_event(rtd, substream->stream,
842 SND_SOC_DAPM_STREAM_START);
844 for_each_rtd_dais(rtd, i, dai)
845 snd_soc_dai_digital_mute(dai, 0, substream->stream);
848 mutex_unlock(&rtd->card->pcm_mutex);
851 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
856 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
859 struct snd_interval *interval;
860 int channels = hweight_long(mask);
862 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
863 interval->min = channels;
864 interval->max = channels;
867 static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback)
869 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
870 struct snd_soc_dai *dai;
873 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
875 /* clear the corresponding DAIs parameters when going to be inactive */
876 for_each_rtd_dais(rtd, i, dai) {
877 int active = snd_soc_dai_stream_active(dai, substream->stream);
879 if (snd_soc_dai_active(dai) == 1)
880 soc_pcm_set_dai_params(dai, NULL);
883 snd_soc_dai_digital_mute(dai, 1, substream->stream);
886 /* run the stream event */
887 snd_soc_dapm_stream_stop(rtd, substream->stream);
889 /* free any machine hw params */
890 snd_soc_link_hw_free(substream, rollback);
892 /* free any component resources */
893 snd_soc_pcm_component_hw_free(substream, rollback);
895 /* now free hw params for the DAIs */
896 for_each_rtd_dais(rtd, i, dai) {
897 if (!snd_soc_dai_stream_valid(dai, substream->stream))
900 snd_soc_dai_hw_free(dai, substream, rollback);
903 mutex_unlock(&rtd->card->pcm_mutex);
908 * Frees resources allocated by hw_params, can be called multiple times
910 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
912 return soc_pcm_hw_clean(substream, 0);
916 * Called by ALSA when the hardware params are set by application. This
917 * function can also be called multiple times and can allocate buffers
918 * (using snd_pcm_lib_* ). It's non-atomic.
920 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
921 struct snd_pcm_hw_params *params)
923 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
924 struct snd_soc_dai *cpu_dai;
925 struct snd_soc_dai *codec_dai;
928 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
930 ret = soc_pcm_params_symmetry(substream, params);
934 ret = snd_soc_link_hw_params(substream, params);
938 for_each_rtd_codec_dais(rtd, i, codec_dai) {
939 struct snd_pcm_hw_params codec_params;
942 * Skip CODECs which don't support the current stream type,
943 * the idea being that if a CODEC is not used for the currently
944 * set up transfer direction, it should not need to be
945 * configured, especially since the configuration used might
946 * not even be supported by that CODEC. There may be cases
947 * however where a CODEC needs to be set up although it is
948 * actually not being used for the transfer, e.g. if a
949 * capture-only CODEC is acting as an LRCLK and/or BCLK master
950 * for the DAI link including a playback-only CODEC.
951 * If this becomes necessary, we will have to augment the
952 * machine driver setup with information on how to act, so
953 * we can do the right thing here.
955 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
958 /* copy params for each codec */
959 codec_params = *params;
961 /* fixup params based on TDM slot masks */
962 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
964 soc_pcm_codec_params_fixup(&codec_params,
967 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
969 soc_pcm_codec_params_fixup(&codec_params,
972 ret = snd_soc_dai_hw_params(codec_dai, substream,
977 soc_pcm_set_dai_params(codec_dai, &codec_params);
978 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
981 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
983 * Skip CPUs which don't support the current stream
984 * type. See soc_pcm_init_runtime_hw() for more details
986 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
989 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
993 /* store the parameters for each DAI */
994 soc_pcm_set_dai_params(cpu_dai, params);
995 snd_soc_dapm_update_dai(substream, params, cpu_dai);
998 ret = snd_soc_pcm_component_hw_params(substream, params);
1000 mutex_unlock(&rtd->card->pcm_mutex);
1003 soc_pcm_hw_clean(substream, 1);
1004 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
1010 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1012 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1013 int ret = -EINVAL, _ret = 0;
1017 case SNDRV_PCM_TRIGGER_START:
1018 case SNDRV_PCM_TRIGGER_RESUME:
1019 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1020 ret = snd_soc_link_trigger(substream, cmd, 0);
1024 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1028 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1037 case SNDRV_PCM_TRIGGER_START:
1038 cmd = SNDRV_PCM_TRIGGER_STOP;
1040 case SNDRV_PCM_TRIGGER_RESUME:
1041 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1043 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1044 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1050 case SNDRV_PCM_TRIGGER_STOP:
1051 case SNDRV_PCM_TRIGGER_SUSPEND:
1052 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1053 if (rtd->dai_link->stop_dma_first) {
1054 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1058 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1062 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1066 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1070 ret = snd_soc_link_trigger(substream, cmd, rollback);
1081 * soc level wrapper for pointer callback
1082 * If cpu_dai, codec_dai, component driver has the delay callback, then
1083 * the runtime->delay will be updated accordingly.
1085 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1087 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1088 struct snd_soc_dai *cpu_dai;
1089 struct snd_soc_dai *codec_dai;
1090 struct snd_pcm_runtime *runtime = substream->runtime;
1091 snd_pcm_uframes_t offset = 0;
1092 snd_pcm_sframes_t delay = 0;
1093 snd_pcm_sframes_t codec_delay = 0;
1094 snd_pcm_sframes_t cpu_delay = 0;
1097 /* clearing the previous total delay */
1100 offset = snd_soc_pcm_component_pointer(substream);
1102 /* base delay if assigned in pointer callback */
1103 delay = runtime->delay;
1105 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1106 cpu_delay = max(cpu_delay,
1107 snd_soc_dai_delay(cpu_dai, substream));
1111 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1112 codec_delay = max(codec_delay,
1113 snd_soc_dai_delay(codec_dai, substream));
1115 delay += codec_delay;
1117 runtime->delay = delay;
1122 /* connect a FE and BE */
1123 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1124 struct snd_soc_pcm_runtime *be, int stream)
1126 struct snd_soc_dpcm *dpcm;
1127 unsigned long flags;
1129 /* only add new dpcms */
1130 for_each_dpcm_be(fe, stream, dpcm) {
1131 if (dpcm->be == be && dpcm->fe == fe)
1135 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1141 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1142 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1143 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1144 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1145 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1146 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1148 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1149 stream ? "capture" : "playback", fe->dai_link->name,
1150 stream ? "<-" : "->", be->dai_link->name);
1152 dpcm_create_debugfs_state(dpcm, stream);
1157 /* reparent a BE onto another FE */
1158 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1159 struct snd_soc_pcm_runtime *be, int stream)
1161 struct snd_soc_dpcm *dpcm;
1162 struct snd_pcm_substream *fe_substream, *be_substream;
1164 /* reparent if BE is connected to other FEs */
1165 if (!be->dpcm[stream].users)
1168 be_substream = snd_soc_dpcm_get_substream(be, stream);
1170 for_each_dpcm_fe(be, stream, dpcm) {
1174 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1175 stream ? "capture" : "playback",
1176 dpcm->fe->dai_link->name,
1177 stream ? "<-" : "->", dpcm->be->dai_link->name);
1179 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1180 be_substream->runtime = fe_substream->runtime;
1185 /* disconnect a BE and FE */
1186 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1188 struct snd_soc_dpcm *dpcm, *d;
1189 unsigned long flags;
1191 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1192 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1193 stream ? "capture" : "playback",
1194 dpcm->be->dai_link->name);
1196 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1199 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1200 stream ? "capture" : "playback", fe->dai_link->name,
1201 stream ? "<-" : "->", dpcm->be->dai_link->name);
1203 /* BEs still alive need new FE */
1204 dpcm_be_reparent(fe, dpcm->be, stream);
1206 dpcm_remove_debugfs_state(dpcm);
1208 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1209 list_del(&dpcm->list_be);
1210 list_del(&dpcm->list_fe);
1211 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1216 /* get BE for DAI widget and stream */
1217 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1218 struct snd_soc_dapm_widget *widget, int stream)
1220 struct snd_soc_pcm_runtime *be;
1221 struct snd_soc_dapm_widget *w;
1222 struct snd_soc_dai *dai;
1225 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1227 for_each_card_rtds(card, be) {
1229 if (!be->dai_link->no_pcm)
1232 for_each_rtd_dais(be, i, dai) {
1233 w = snd_soc_dai_get_widget(dai, stream);
1235 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1236 w ? w->name : "(not set)");
1243 /* Widget provided is not a BE */
1247 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1248 struct snd_soc_dapm_widget *widget)
1250 struct snd_soc_dapm_widget *w;
1253 for_each_dapm_widgets(list, i, w)
1260 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1261 enum snd_soc_dapm_direction dir)
1263 struct snd_soc_card *card = widget->dapm->card;
1264 struct snd_soc_pcm_runtime *rtd;
1267 /* adjust dir to stream */
1268 if (dir == SND_SOC_DAPM_DIR_OUT)
1269 stream = SNDRV_PCM_STREAM_PLAYBACK;
1271 stream = SNDRV_PCM_STREAM_CAPTURE;
1273 rtd = dpcm_get_be(card, widget, stream);
1280 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1281 int stream, struct snd_soc_dapm_widget_list **list)
1283 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1286 if (fe->num_cpus > 1) {
1288 "%s doesn't support Multi CPU yet\n", __func__);
1292 /* get number of valid DAI paths and their widgets */
1293 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1294 fe->card->component_chaining ?
1295 NULL : dpcm_end_walk_at_be);
1298 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1299 stream ? "capture" : "playback");
1300 else if (paths == 0)
1301 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1302 stream ? "capture" : "playback");
1307 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1309 snd_soc_dapm_dai_free_widgets(list);
1312 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1313 struct snd_soc_dapm_widget_list *list)
1315 struct snd_soc_dai *dai;
1318 /* is there a valid DAI widget for this BE */
1319 for_each_rtd_dais(dpcm->be, i, dai) {
1320 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1323 * The BE is pruned only if none of the dai
1324 * widgets are in the active list.
1326 if (widget && widget_in_list(list, widget))
1333 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1334 struct snd_soc_dapm_widget_list **list_)
1336 struct snd_soc_dpcm *dpcm;
1339 /* Destroy any old FE <--> BE connections */
1340 for_each_dpcm_be(fe, stream, dpcm) {
1341 if (dpcm_be_is_active(dpcm, stream, *list_))
1344 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1345 stream ? "capture" : "playback",
1346 dpcm->be->dai_link->name, fe->dai_link->name);
1347 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1348 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1352 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1356 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1357 struct snd_soc_dapm_widget_list **list_)
1359 struct snd_soc_card *card = fe->card;
1360 struct snd_soc_dapm_widget_list *list = *list_;
1361 struct snd_soc_pcm_runtime *be;
1362 struct snd_soc_dapm_widget *widget;
1363 int i, new = 0, err;
1365 /* Create any new FE <--> BE connections */
1366 for_each_dapm_widgets(list, i, widget) {
1368 switch (widget->id) {
1369 case snd_soc_dapm_dai_in:
1370 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1373 case snd_soc_dapm_dai_out:
1374 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1381 /* is there a valid BE rtd for this widget */
1382 be = dpcm_get_be(card, widget, stream);
1384 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1389 /* don't connect if FE is not running */
1390 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1393 /* newly connected FE and BE */
1394 err = dpcm_be_connect(fe, be, stream);
1396 dev_err(fe->dev, "ASoC: can't connect %s\n",
1399 } else if (err == 0) /* already connected */
1403 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1407 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1412 * Find the corresponding BE DAIs that source or sink audio to this
1415 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1416 int stream, struct snd_soc_dapm_widget_list **list, int new)
1419 return dpcm_add_paths(fe, stream, list);
1421 return dpcm_prune_paths(fe, stream, list);
1424 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1426 struct snd_soc_dpcm *dpcm;
1427 unsigned long flags;
1429 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1430 for_each_dpcm_be(fe, stream, dpcm)
1431 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1432 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1435 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1436 int do_hw_free, struct snd_soc_dpcm *last)
1438 struct snd_soc_dpcm *dpcm;
1440 /* disable any enabled and non active backends */
1441 for_each_dpcm_be(fe, stream, dpcm) {
1442 struct snd_soc_pcm_runtime *be = dpcm->be;
1443 struct snd_pcm_substream *be_substream =
1444 snd_soc_dpcm_get_substream(be, stream);
1449 /* is this op for this BE ? */
1450 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1453 if (be->dpcm[stream].users == 0) {
1454 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1455 stream ? "capture" : "playback",
1456 be->dpcm[stream].state);
1460 if (--be->dpcm[stream].users != 0)
1463 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1467 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1468 soc_pcm_hw_free(be_substream);
1469 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1473 soc_pcm_close(be_substream);
1474 be_substream->runtime = NULL;
1475 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1479 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1481 struct snd_soc_pcm_runtime *be;
1482 struct snd_soc_dpcm *dpcm;
1485 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1486 for_each_dpcm_be(fe, stream, dpcm) {
1487 struct snd_pcm_substream *be_substream;
1490 be_substream = snd_soc_dpcm_get_substream(be, stream);
1492 if (!be_substream) {
1493 dev_err(be->dev, "ASoC: no backend %s stream\n",
1494 stream ? "capture" : "playback");
1498 /* is this op for this BE ? */
1499 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1502 /* first time the dpcm is open ? */
1503 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1504 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1505 stream ? "capture" : "playback",
1506 be->dpcm[stream].state);
1510 if (be->dpcm[stream].users++ != 0)
1513 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1514 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1517 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1518 stream ? "capture" : "playback", be->dai_link->name);
1520 be_substream->runtime = be->dpcm[stream].runtime;
1521 err = soc_pcm_open(be_substream);
1523 be->dpcm[stream].users--;
1524 if (be->dpcm[stream].users < 0)
1525 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1526 stream ? "capture" : "playback",
1527 be->dpcm[stream].state);
1529 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1533 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1540 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1542 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n",
1543 __func__, be->dai_link->name, err);
1548 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1550 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1551 struct snd_pcm_runtime *runtime = substream->runtime;
1552 struct snd_pcm_hardware *hw = &runtime->hw;
1553 struct snd_soc_dai *dai;
1554 int stream = substream->stream;
1557 soc_pcm_hw_init(hw);
1559 for_each_rtd_cpu_dais(fe, i, dai) {
1560 struct snd_soc_pcm_stream *cpu_stream;
1563 * Skip CPUs which don't support the current stream
1564 * type. See soc_pcm_init_runtime_hw() for more details
1566 if (!snd_soc_dai_stream_valid(dai, stream))
1569 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1571 soc_pcm_hw_update_rate(hw, cpu_stream);
1572 soc_pcm_hw_update_chan(hw, cpu_stream);
1573 soc_pcm_hw_update_format(hw, cpu_stream);
1578 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1580 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1581 struct snd_pcm_runtime *runtime = substream->runtime;
1582 struct snd_pcm_hardware *hw = &runtime->hw;
1583 struct snd_soc_dpcm *dpcm;
1584 struct snd_soc_dai *dai;
1585 int stream = substream->stream;
1587 if (!fe->dai_link->dpcm_merged_format)
1591 * It returns merged BE codec format
1592 * if FE want to use it (= dpcm_merged_format)
1595 for_each_dpcm_be(fe, stream, dpcm) {
1596 struct snd_soc_pcm_runtime *be = dpcm->be;
1597 struct snd_soc_pcm_stream *codec_stream;
1600 for_each_rtd_codec_dais(be, i, dai) {
1602 * Skip CODECs which don't support the current stream
1603 * type. See soc_pcm_init_runtime_hw() for more details
1605 if (!snd_soc_dai_stream_valid(dai, stream))
1608 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1610 soc_pcm_hw_update_format(hw, codec_stream);
1615 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1617 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1618 struct snd_pcm_runtime *runtime = substream->runtime;
1619 struct snd_pcm_hardware *hw = &runtime->hw;
1620 struct snd_soc_dpcm *dpcm;
1621 int stream = substream->stream;
1623 if (!fe->dai_link->dpcm_merged_chan)
1627 * It returns merged BE codec channel;
1628 * if FE want to use it (= dpcm_merged_chan)
1631 for_each_dpcm_be(fe, stream, dpcm) {
1632 struct snd_soc_pcm_runtime *be = dpcm->be;
1633 struct snd_soc_pcm_stream *cpu_stream;
1634 struct snd_soc_dai *dai;
1637 for_each_rtd_cpu_dais(be, i, dai) {
1639 * Skip CPUs which don't support the current stream
1640 * type. See soc_pcm_init_runtime_hw() for more details
1642 if (!snd_soc_dai_stream_valid(dai, stream))
1645 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1647 soc_pcm_hw_update_chan(hw, cpu_stream);
1651 * chan min/max cannot be enforced if there are multiple CODEC
1652 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1654 if (be->num_codecs == 1) {
1655 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1656 asoc_rtd_to_codec(be, 0), stream);
1658 soc_pcm_hw_update_chan(hw, codec_stream);
1663 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1665 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1666 struct snd_pcm_runtime *runtime = substream->runtime;
1667 struct snd_pcm_hardware *hw = &runtime->hw;
1668 struct snd_soc_dpcm *dpcm;
1669 int stream = substream->stream;
1671 if (!fe->dai_link->dpcm_merged_rate)
1675 * It returns merged BE codec channel;
1676 * if FE want to use it (= dpcm_merged_chan)
1679 for_each_dpcm_be(fe, stream, dpcm) {
1680 struct snd_soc_pcm_runtime *be = dpcm->be;
1681 struct snd_soc_pcm_stream *pcm;
1682 struct snd_soc_dai *dai;
1685 for_each_rtd_dais(be, i, dai) {
1687 * Skip DAIs which don't support the current stream
1688 * type. See soc_pcm_init_runtime_hw() for more details
1690 if (!snd_soc_dai_stream_valid(dai, stream))
1693 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1695 soc_pcm_hw_update_rate(hw, pcm);
1700 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1703 struct snd_soc_dpcm *dpcm;
1704 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1705 struct snd_soc_dai *fe_cpu_dai;
1709 /* apply symmetry for FE */
1710 soc_pcm_update_symmetry(fe_substream);
1712 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1713 /* Symmetry only applies if we've got an active stream. */
1714 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1719 /* apply symmetry for BE */
1720 for_each_dpcm_be(fe, stream, dpcm) {
1721 struct snd_soc_pcm_runtime *be = dpcm->be;
1722 struct snd_pcm_substream *be_substream =
1723 snd_soc_dpcm_get_substream(be, stream);
1724 struct snd_soc_pcm_runtime *rtd;
1725 struct snd_soc_dai *dai;
1727 /* A backend may not have the requested substream */
1731 rtd = asoc_substream_to_rtd(be_substream);
1732 if (rtd->dai_link->be_hw_params_fixup)
1735 soc_pcm_update_symmetry(be_substream);
1737 /* Symmetry only applies if we've got an active stream. */
1738 for_each_rtd_dais(rtd, i, dai) {
1739 err = soc_pcm_apply_symmetry(fe_substream, dai);
1746 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err);
1751 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1753 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1754 int stream = fe_substream->stream, ret = 0;
1756 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1758 ret = dpcm_be_dai_startup(fe, stream);
1762 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1764 /* start the DAI frontend */
1765 ret = soc_pcm_open(fe_substream);
1769 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1771 dpcm_runtime_setup_fe(fe_substream);
1773 dpcm_runtime_setup_be_format(fe_substream);
1774 dpcm_runtime_setup_be_chan(fe_substream);
1775 dpcm_runtime_setup_be_rate(fe_substream);
1777 ret = dpcm_apply_symmetry(fe_substream, stream);
1781 dpcm_be_dai_startup_unwind(fe, stream);
1783 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1786 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret);
1791 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1793 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1794 int stream = substream->stream;
1796 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1798 /* shutdown the BEs */
1799 dpcm_be_dai_shutdown(fe, stream);
1801 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1803 /* now shutdown the frontend */
1804 soc_pcm_close(substream);
1806 /* run the stream stop event */
1807 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1809 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1810 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1814 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1816 struct snd_soc_dpcm *dpcm;
1818 /* only hw_params backends that are either sinks or sources
1819 * to this frontend DAI */
1820 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);
1826 /* is this op for this BE ? */
1827 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1830 /* only free hw when no longer used - check all FEs */
1831 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1834 /* do not free hw if this BE is used by other FE */
1835 if (be->dpcm[stream].users > 1)
1838 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1839 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1840 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1841 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1842 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1843 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1846 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1847 be->dai_link->name);
1849 soc_pcm_hw_free(be_substream);
1851 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1855 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1857 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1858 int stream = substream->stream;
1860 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1861 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1863 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1865 /* call hw_free on the frontend */
1866 soc_pcm_hw_free(substream);
1868 /* only hw_params backends that are either sinks or sources
1869 * to this frontend DAI */
1870 dpcm_be_dai_hw_free(fe, stream);
1872 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1873 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1875 mutex_unlock(&fe->card->mutex);
1879 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1881 struct snd_soc_pcm_runtime *be;
1882 struct snd_pcm_substream *be_substream;
1883 struct snd_soc_dpcm *dpcm;
1886 for_each_dpcm_be(fe, stream, dpcm) {
1888 be_substream = snd_soc_dpcm_get_substream(be, stream);
1890 /* is this op for this BE ? */
1891 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1894 /* copy params for each dpcm */
1895 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1896 sizeof(struct snd_pcm_hw_params));
1898 /* perform any hw_params fixups */
1899 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
1903 /* copy the fixed-up hw params for BE dai */
1904 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
1905 sizeof(struct snd_pcm_hw_params));
1907 /* only allow hw_params() if no connected FEs are running */
1908 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1911 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1912 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1913 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1916 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1917 be->dai_link->name);
1919 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1923 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1928 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
1929 __func__, be->dai_link->name, ret);
1931 /* disable any enabled and non active backends */
1932 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1934 be_substream = snd_soc_dpcm_get_substream(be, stream);
1936 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1939 /* only allow hw_free() if no connected FEs are running */
1940 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1943 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1944 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1945 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1946 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1949 soc_pcm_hw_free(be_substream);
1955 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1956 struct snd_pcm_hw_params *params)
1958 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1959 int ret, stream = substream->stream;
1961 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1962 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1964 memcpy(&fe->dpcm[stream].hw_params, params,
1965 sizeof(struct snd_pcm_hw_params));
1966 ret = dpcm_be_dai_hw_params(fe, stream);
1970 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1971 fe->dai_link->name, params_rate(params),
1972 params_channels(params), params_format(params));
1974 /* call hw_params on the frontend */
1975 ret = soc_pcm_hw_params(substream, params);
1977 dpcm_be_dai_hw_free(fe, stream);
1979 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1982 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1983 mutex_unlock(&fe->card->mutex);
1986 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret);
1991 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1994 struct snd_soc_pcm_runtime *be;
1995 struct snd_soc_dpcm *dpcm;
1998 for_each_dpcm_be(fe, stream, dpcm) {
1999 struct snd_pcm_substream *be_substream;
2002 be_substream = snd_soc_dpcm_get_substream(be, stream);
2004 /* is this op for this BE ? */
2005 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2008 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2009 be->dai_link->name, cmd);
2012 case SNDRV_PCM_TRIGGER_START:
2013 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2014 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2015 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2018 ret = soc_pcm_trigger(be_substream, cmd);
2022 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2024 case SNDRV_PCM_TRIGGER_RESUME:
2025 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2028 ret = soc_pcm_trigger(be_substream, cmd);
2032 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2034 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2035 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2038 ret = soc_pcm_trigger(be_substream, cmd);
2042 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2044 case SNDRV_PCM_TRIGGER_STOP:
2045 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2046 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2049 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2052 ret = soc_pcm_trigger(be_substream, cmd);
2056 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2058 case SNDRV_PCM_TRIGGER_SUSPEND:
2059 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2062 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2065 ret = soc_pcm_trigger(be_substream, cmd);
2069 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2071 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2072 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2075 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2078 ret = soc_pcm_trigger(be_substream, cmd);
2082 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2088 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2089 __func__, be->dai_link->name, ret);
2092 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2094 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2095 int cmd, bool fe_first)
2097 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2100 /* call trigger on the frontend before the backend. */
2102 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2103 fe->dai_link->name, cmd);
2105 ret = soc_pcm_trigger(substream, cmd);
2109 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2113 /* call trigger on the frontend after the backend. */
2114 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2118 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2119 fe->dai_link->name, cmd);
2121 ret = soc_pcm_trigger(substream, cmd);
2126 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2128 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2129 int stream = substream->stream;
2131 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2133 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2136 case SND_SOC_DPCM_TRIGGER_PRE:
2138 case SNDRV_PCM_TRIGGER_START:
2139 case SNDRV_PCM_TRIGGER_RESUME:
2140 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2141 case SNDRV_PCM_TRIGGER_DRAIN:
2142 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2144 case SNDRV_PCM_TRIGGER_STOP:
2145 case SNDRV_PCM_TRIGGER_SUSPEND:
2146 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2147 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2154 case SND_SOC_DPCM_TRIGGER_POST:
2156 case SNDRV_PCM_TRIGGER_START:
2157 case SNDRV_PCM_TRIGGER_RESUME:
2158 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2159 case SNDRV_PCM_TRIGGER_DRAIN:
2160 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2162 case SNDRV_PCM_TRIGGER_STOP:
2163 case SNDRV_PCM_TRIGGER_SUSPEND:
2164 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2165 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2172 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2173 /* bespoke trigger() - handles both FE and BEs */
2175 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2176 fe->dai_link->name, cmd);
2178 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2181 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2182 fe->dai_link->name);
2188 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2194 case SNDRV_PCM_TRIGGER_START:
2195 case SNDRV_PCM_TRIGGER_RESUME:
2196 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2197 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2199 case SNDRV_PCM_TRIGGER_STOP:
2200 case SNDRV_PCM_TRIGGER_SUSPEND:
2201 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2203 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2204 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2209 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2213 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2215 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2216 int stream = substream->stream;
2218 /* if FE's runtime_update is already set, we're in race;
2219 * process this trigger later at exit
2221 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2222 fe->dpcm[stream].trigger_pending = cmd + 1;
2223 return 0; /* delayed, assuming it's successful */
2226 /* we're alone, let's trigger */
2227 return dpcm_fe_dai_do_trigger(substream, cmd);
2230 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2232 struct snd_soc_dpcm *dpcm;
2235 for_each_dpcm_be(fe, stream, dpcm) {
2237 struct snd_soc_pcm_runtime *be = dpcm->be;
2238 struct snd_pcm_substream *be_substream =
2239 snd_soc_dpcm_get_substream(be, stream);
2241 /* is this op for this BE ? */
2242 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2245 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2246 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2247 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2248 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2251 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2252 be->dai_link->name);
2254 ret = soc_pcm_prepare(be_substream);
2258 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2262 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2267 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2269 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2270 int stream = substream->stream, ret = 0;
2272 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2274 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2276 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2278 /* there is no point preparing this FE if there are no BEs */
2279 if (list_empty(&fe->dpcm[stream].be_clients)) {
2280 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2281 fe->dai_link->name);
2286 ret = dpcm_be_dai_prepare(fe, stream);
2290 /* call prepare on the frontend */
2291 ret = soc_pcm_prepare(substream);
2295 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2298 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2299 mutex_unlock(&fe->card->mutex);
2302 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2307 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2309 struct snd_pcm_substream *substream =
2310 snd_soc_dpcm_get_substream(fe, stream);
2311 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2314 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2315 stream ? "capture" : "playback", fe->dai_link->name);
2317 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2318 /* call bespoke trigger - FE takes care of all BE triggers */
2319 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2320 fe->dai_link->name);
2322 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2324 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2325 fe->dai_link->name);
2327 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2330 dpcm_be_dai_hw_free(fe, stream);
2332 dpcm_be_dai_shutdown(fe, stream);
2334 /* run the stream event for each BE */
2335 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2338 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err);
2343 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2345 struct snd_pcm_substream *substream =
2346 snd_soc_dpcm_get_substream(fe, stream);
2347 struct snd_soc_dpcm *dpcm;
2348 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2350 unsigned long flags;
2352 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2353 stream ? "capture" : "playback", fe->dai_link->name);
2355 /* Only start the BE if the FE is ready */
2356 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2357 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2358 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2359 fe->dai_link->name, fe->dpcm[stream].state);
2364 /* startup must always be called for new BEs */
2365 ret = dpcm_be_dai_startup(fe, stream);
2369 /* keep going if FE state is > open */
2370 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2373 ret = dpcm_be_dai_hw_params(fe, stream);
2377 /* keep going if FE state is > hw_params */
2378 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2381 ret = dpcm_be_dai_prepare(fe, stream);
2385 /* run the stream event for each BE */
2386 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2388 /* keep going if FE state is > prepare */
2389 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2390 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2393 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2394 /* call trigger on the frontend - FE takes care of all BE triggers */
2395 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2396 fe->dai_link->name);
2398 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2402 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2403 fe->dai_link->name);
2405 ret = dpcm_be_dai_trigger(fe, stream,
2406 SNDRV_PCM_TRIGGER_START);
2414 dpcm_be_dai_hw_free(fe, stream);
2416 dpcm_be_dai_shutdown(fe, stream);
2418 /* disconnect any pending BEs */
2419 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2420 for_each_dpcm_be(fe, stream, dpcm) {
2421 struct snd_soc_pcm_runtime *be = dpcm->be;
2423 /* is this op for this BE ? */
2424 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2427 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2428 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2429 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2431 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2434 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2439 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2441 struct snd_soc_dapm_widget_list *list;
2445 if (!fe->dai_link->dynamic)
2448 if (fe->num_cpus > 1) {
2450 "%s doesn't support Multi CPU yet\n", __func__);
2454 /* only check active links */
2455 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2458 /* DAPM sync will call this to update DSP paths */
2459 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2460 new ? "new" : "old", fe->dai_link->name);
2462 for_each_pcm_streams(stream) {
2464 /* skip if FE doesn't have playback/capture capability */
2465 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2466 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2469 /* skip if FE isn't currently playing/capturing */
2470 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2471 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2474 paths = dpcm_path_get(fe, stream, &list);
2478 /* update any playback/capture paths */
2479 count = dpcm_process_paths(fe, stream, &list, new);
2481 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2483 dpcm_run_update_startup(fe, stream);
2485 dpcm_run_update_shutdown(fe, stream);
2486 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2488 dpcm_clear_pending_state(fe, stream);
2489 dpcm_be_disconnect(fe, stream);
2492 dpcm_path_put(&list);
2498 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2501 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2503 struct snd_soc_pcm_runtime *fe;
2506 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2507 /* shutdown all old paths first */
2508 for_each_card_rtds(card, fe) {
2509 ret = soc_dpcm_fe_runtime_update(fe, 0);
2514 /* bring new paths up */
2515 for_each_card_rtds(card, fe) {
2516 ret = soc_dpcm_fe_runtime_update(fe, 1);
2522 mutex_unlock(&card->mutex);
2525 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2527 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2529 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2530 struct snd_soc_dpcm *dpcm;
2531 int stream = fe_substream->stream;
2533 /* mark FE's links ready to prune */
2534 for_each_dpcm_be(fe, stream, dpcm)
2535 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2537 dpcm_be_disconnect(fe, stream);
2539 fe->dpcm[stream].runtime = NULL;
2542 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2544 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2547 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2548 ret = dpcm_fe_dai_shutdown(fe_substream);
2550 dpcm_fe_dai_cleanup(fe_substream);
2552 mutex_unlock(&fe->card->mutex);
2556 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2558 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2559 struct snd_soc_dapm_widget_list *list;
2561 int stream = fe_substream->stream;
2563 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2564 fe->dpcm[stream].runtime = fe_substream->runtime;
2566 ret = dpcm_path_get(fe, stream, &list);
2570 /* calculate valid and active FE <-> BE dpcms */
2571 dpcm_process_paths(fe, stream, &list, 1);
2573 ret = dpcm_fe_dai_startup(fe_substream);
2575 dpcm_fe_dai_cleanup(fe_substream);
2577 dpcm_clear_pending_state(fe, stream);
2578 dpcm_path_put(&list);
2580 mutex_unlock(&fe->card->mutex);
2584 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2585 int *playback, int *capture)
2587 struct snd_soc_dai *cpu_dai;
2590 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) {
2592 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2596 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2599 if (rtd->dai_link->dpcm_playback) {
2600 stream = SNDRV_PCM_STREAM_PLAYBACK;
2602 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2603 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2609 dev_err(rtd->card->dev,
2610 "No CPU DAIs support playback for stream %s\n",
2611 rtd->dai_link->stream_name);
2615 if (rtd->dai_link->dpcm_capture) {
2616 stream = SNDRV_PCM_STREAM_CAPTURE;
2618 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2619 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2626 dev_err(rtd->card->dev,
2627 "No CPU DAIs support capture for stream %s\n",
2628 rtd->dai_link->stream_name);
2633 struct snd_soc_dai *codec_dai;
2635 /* Adapt stream for codec2codec links */
2636 int cpu_capture = rtd->dai_link->params ?
2637 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2638 int cpu_playback = rtd->dai_link->params ?
2639 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2641 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2642 if (rtd->num_cpus == 1) {
2643 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2644 } else if (rtd->num_cpus == rtd->num_codecs) {
2645 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2647 dev_err(rtd->card->dev,
2648 "N cpus to M codecs link is not supported yet\n");
2652 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2653 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2655 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2656 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2661 if (rtd->dai_link->playback_only) {
2666 if (rtd->dai_link->capture_only) {
2674 static int soc_create_pcm(struct snd_pcm **pcm,
2675 struct snd_soc_pcm_runtime *rtd,
2676 int playback, int capture, int num)
2681 /* create the PCM */
2682 if (rtd->dai_link->params) {
2683 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2684 rtd->dai_link->stream_name);
2686 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2687 playback, capture, pcm);
2688 } else if (rtd->dai_link->no_pcm) {
2689 snprintf(new_name, sizeof(new_name), "(%s)",
2690 rtd->dai_link->stream_name);
2692 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2693 playback, capture, pcm);
2695 if (rtd->dai_link->dynamic)
2696 snprintf(new_name, sizeof(new_name), "%s (*)",
2697 rtd->dai_link->stream_name);
2699 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2700 rtd->dai_link->stream_name,
2701 soc_codec_dai_name(rtd), num);
2703 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2707 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2708 new_name, rtd->dai_link->name, ret);
2711 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2716 /* create a new pcm */
2717 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2719 struct snd_soc_component *component;
2720 struct snd_pcm *pcm;
2721 int ret = 0, playback = 0, capture = 0;
2724 ret = soc_get_playback_capture(rtd, &playback, &capture);
2728 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2732 /* DAPM dai link stream work */
2733 if (rtd->dai_link->params)
2734 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2736 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2739 pcm->nonatomic = rtd->dai_link->nonatomic;
2740 pcm->private_data = rtd;
2742 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2744 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2746 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2750 /* ASoC PCM operations */
2751 if (rtd->dai_link->dynamic) {
2752 rtd->ops.open = dpcm_fe_dai_open;
2753 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2754 rtd->ops.prepare = dpcm_fe_dai_prepare;
2755 rtd->ops.trigger = dpcm_fe_dai_trigger;
2756 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2757 rtd->ops.close = dpcm_fe_dai_close;
2758 rtd->ops.pointer = soc_pcm_pointer;
2760 rtd->ops.open = soc_pcm_open;
2761 rtd->ops.hw_params = soc_pcm_hw_params;
2762 rtd->ops.prepare = soc_pcm_prepare;
2763 rtd->ops.trigger = soc_pcm_trigger;
2764 rtd->ops.hw_free = soc_pcm_hw_free;
2765 rtd->ops.close = soc_pcm_close;
2766 rtd->ops.pointer = soc_pcm_pointer;
2769 for_each_rtd_components(rtd, i, component) {
2770 const struct snd_soc_component_driver *drv = component->driver;
2773 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2775 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2777 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2779 rtd->ops.page = snd_soc_pcm_component_page;
2781 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2783 rtd->ops.ack = snd_soc_pcm_component_ack;
2787 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2790 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2792 ret = snd_soc_pcm_component_new(rtd);
2796 pcm->no_device_suspend = true;
2798 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2799 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2803 /* is the current PCM operation for this FE ? */
2804 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2806 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2810 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2812 /* is the current PCM operation for this BE ? */
2813 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2814 struct snd_soc_pcm_runtime *be, int stream)
2816 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2817 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2818 be->dpcm[stream].runtime_update))
2822 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2824 /* get the substream for this BE */
2825 struct snd_pcm_substream *
2826 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2828 return be->pcm->streams[stream].substream;
2830 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2832 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2833 struct snd_soc_pcm_runtime *be,
2835 const enum snd_soc_dpcm_state *states,
2838 struct snd_soc_dpcm *dpcm;
2841 unsigned long flags;
2844 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2845 for_each_dpcm_fe(be, stream, dpcm) {
2850 state = dpcm->fe->dpcm[stream].state;
2851 for (i = 0; i < num_states; i++) {
2852 if (state == states[i]) {
2858 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2860 /* it's safe to do this BE DAI */
2865 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2866 * are not running, paused or suspended for the specified stream direction.
2868 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2869 struct snd_soc_pcm_runtime *be, int stream)
2871 const enum snd_soc_dpcm_state state[] = {
2872 SND_SOC_DPCM_STATE_START,
2873 SND_SOC_DPCM_STATE_PAUSED,
2874 SND_SOC_DPCM_STATE_SUSPEND,
2877 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2879 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2882 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2883 * running, paused or suspended for the specified stream direction.
2885 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2886 struct snd_soc_pcm_runtime *be, int stream)
2888 const enum snd_soc_dpcm_state state[] = {
2889 SND_SOC_DPCM_STATE_START,
2890 SND_SOC_DPCM_STATE_PAUSED,
2891 SND_SOC_DPCM_STATE_SUSPEND,
2892 SND_SOC_DPCM_STATE_PREPARE,
2895 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2897 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);