| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // soc-pcm.c -- ALSA SoC PCM |
| // |
| // Copyright 2005 Wolfson Microelectronics PLC. |
| // Copyright 2005 Openedhand Ltd. |
| // Copyright (C) 2010 Slimlogic Ltd. |
| // Copyright (C) 2010 Texas Instruments Inc. |
| // |
| // Authors: Liam Girdwood <lrg@ti.com> |
| // Mark Brown <broonie@opensource.wolfsonmicro.com> |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/pinctrl/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/workqueue.h> |
| #include <linux/export.h> |
| #include <linux/debugfs.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include <sound/soc-dpcm.h> |
| #include <sound/soc-link.h> |
| #include <sound/initval.h> |
| |
| #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) |
| static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, |
| const char *func, int ret) |
| { |
| /* Positive, Zero values are not errors */ |
| if (ret >= 0) |
| return ret; |
| |
| /* Negative values might be errors */ |
| switch (ret) { |
| case -EPROBE_DEFER: |
| case -ENOTSUPP: |
| case -EINVAL: |
| break; |
| default: |
| dev_err(rtd->dev, |
| "ASoC: error at %s on %s: %d\n", |
| func, rtd->dai_link->name, ret); |
| } |
| |
| return ret; |
| } |
| |
| static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, |
| int stream) |
| { |
| snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); |
| } |
| |
| #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ |
| snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) |
| |
| static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, |
| int stream) |
| { |
| snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); |
| } |
| |
| #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ |
| snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) |
| |
| #define DPCM_MAX_BE_USERS 8 |
| |
| static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) |
| { |
| return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu"; |
| } |
| static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) |
| { |
| return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec"; |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| static const char *dpcm_state_string(enum snd_soc_dpcm_state state) |
| { |
| switch (state) { |
| case SND_SOC_DPCM_STATE_NEW: |
| return "new"; |
| case SND_SOC_DPCM_STATE_OPEN: |
| return "open"; |
| case SND_SOC_DPCM_STATE_HW_PARAMS: |
| return "hw_params"; |
| case SND_SOC_DPCM_STATE_PREPARE: |
| return "prepare"; |
| case SND_SOC_DPCM_STATE_START: |
| return "start"; |
| case SND_SOC_DPCM_STATE_STOP: |
| return "stop"; |
| case SND_SOC_DPCM_STATE_SUSPEND: |
| return "suspend"; |
| case SND_SOC_DPCM_STATE_PAUSED: |
| return "paused"; |
| case SND_SOC_DPCM_STATE_HW_FREE: |
| return "hw_free"; |
| case SND_SOC_DPCM_STATE_CLOSE: |
| return "close"; |
| } |
| |
| return "unknown"; |
| } |
| |
| static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, |
| int stream, char *buf, size_t size) |
| { |
| struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; |
| struct snd_soc_dpcm *dpcm; |
| ssize_t offset = 0; |
| |
| /* FE state */ |
| offset += scnprintf(buf + offset, size - offset, |
| "[%s - %s]\n", fe->dai_link->name, |
| stream ? "Capture" : "Playback"); |
| |
| offset += scnprintf(buf + offset, size - offset, "State: %s\n", |
| dpcm_state_string(fe->dpcm[stream].state)); |
| |
| if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) |
| offset += scnprintf(buf + offset, size - offset, |
| "Hardware Params: " |
| "Format = %s, Channels = %d, Rate = %d\n", |
| snd_pcm_format_name(params_format(params)), |
| params_channels(params), |
| params_rate(params)); |
| |
| /* BEs state */ |
| offset += scnprintf(buf + offset, size - offset, "Backends:\n"); |
| |
| if (list_empty(&fe->dpcm[stream].be_clients)) { |
| offset += scnprintf(buf + offset, size - offset, |
| " No active DSP links\n"); |
| goto out; |
| } |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| params = &be->dpcm[stream].hw_params; |
| |
| offset += scnprintf(buf + offset, size - offset, |
| "- %s\n", be->dai_link->name); |
| |
| offset += scnprintf(buf + offset, size - offset, |
| " State: %s\n", |
| dpcm_state_string(be->dpcm[stream].state)); |
| |
| if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) |
| offset += scnprintf(buf + offset, size - offset, |
| " Hardware Params: " |
| "Format = %s, Channels = %d, Rate = %d\n", |
| snd_pcm_format_name(params_format(params)), |
| params_channels(params), |
| params_rate(params)); |
| } |
| out: |
| return offset; |
| } |
| |
| static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, |
| size_t count, loff_t *ppos) |
| { |
| struct snd_soc_pcm_runtime *fe = file->private_data; |
| ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; |
| int stream; |
| char *buf; |
| |
| if (fe->dai_link->num_cpus > 1) { |
| dev_err(fe->dev, |
| "%s doesn't support Multi CPU yet\n", __func__); |
| return -EINVAL; |
| } |
| |
| buf = kmalloc(out_count, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| for_each_pcm_streams(stream) |
| if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream)) |
| offset += dpcm_show_state(fe, stream, |
| buf + offset, |
| out_count - offset); |
| snd_soc_dpcm_mutex_unlock(fe); |
| |
| ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); |
| |
| kfree(buf); |
| return ret; |
| } |
| |
| static const struct file_operations dpcm_state_fops = { |
| .open = simple_open, |
| .read = dpcm_state_read_file, |
| .llseek = default_llseek, |
| }; |
| |
| void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) |
| { |
| if (!rtd->dai_link->dynamic) |
| return; |
| |
| if (!rtd->card->debugfs_card_root) |
| return; |
| |
| rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, |
| rtd->card->debugfs_card_root); |
| |
| debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, |
| rtd, &dpcm_state_fops); |
| } |
| |
| static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) |
| { |
| char *name; |
| |
| name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, |
| stream ? "capture" : "playback"); |
| if (name) { |
| dpcm->debugfs_state = debugfs_create_dir( |
| name, dpcm->fe->debugfs_dpcm_root); |
| debugfs_create_u32("state", 0644, dpcm->debugfs_state, |
| &dpcm->state); |
| kfree(name); |
| } |
| } |
| |
| static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) |
| { |
| debugfs_remove_recursive(dpcm->debugfs_state); |
| } |
| |
| #else |
| static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, |
| int stream) |
| { |
| } |
| |
| static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) |
| { |
| } |
| #endif |
| |
| /* Set FE's runtime_update state; the state is protected via PCM stream lock |
| * for avoiding the race with trigger callback. |
| * If the state is unset and a trigger is pending while the previous operation, |
| * process the pending trigger action here. |
| */ |
| static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); |
| static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, |
| int stream, enum snd_soc_dpcm_update state) |
| { |
| struct snd_pcm_substream *substream = |
| snd_soc_dpcm_get_substream(fe, stream); |
| |
| snd_soc_dpcm_stream_lock_irq(fe, stream); |
| if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { |
| dpcm_fe_dai_do_trigger(substream, |
| fe->dpcm[stream].trigger_pending - 1); |
| fe->dpcm[stream].trigger_pending = 0; |
| } |
| fe->dpcm[stream].runtime_update = state; |
| snd_soc_dpcm_stream_unlock_irq(fe, stream); |
| } |
| |
| static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, |
| int stream, enum snd_soc_dpcm_update state) |
| { |
| be->dpcm[stream].runtime_update = state; |
| } |
| |
| /** |
| * snd_soc_runtime_action() - Increment/Decrement active count for |
| * PCM runtime components |
| * @rtd: ASoC PCM runtime that is activated |
| * @stream: Direction of the PCM stream |
| * @action: Activate stream if 1. Deactivate if -1. |
| * |
| * Increments/Decrements the active count for all the DAIs and components |
| * attached to a PCM runtime. |
| * Should typically be called when a stream is opened. |
| * |
| * Must be called with the rtd->card->pcm_mutex being held |
| */ |
| void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, |
| int stream, int action) |
| { |
| struct snd_soc_component *component; |
| struct snd_soc_dai *dai; |
| int i; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| for_each_rtd_dais(rtd, i, dai) |
| snd_soc_dai_action(dai, stream, action); |
| |
| /* Increments/Decrements the active count for components without DAIs */ |
| for_each_rtd_components(rtd, i, component) { |
| if (component->num_dai) |
| continue; |
| component->active += action; |
| } |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_runtime_action); |
| |
| /** |
| * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay |
| * @rtd: The ASoC PCM runtime that should be checked. |
| * |
| * This function checks whether the power down delay should be ignored for a |
| * specific PCM runtime. Returns true if the delay is 0, if the DAI link has |
| * been configured to ignore the delay, or if none of the components benefits |
| * from having the delay. |
| */ |
| bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) |
| { |
| struct snd_soc_component *component; |
| int i; |
| |
| if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) |
| return true; |
| |
| for_each_rtd_components(rtd, i, component) |
| if (component->driver->use_pmdown_time) |
| /* No need to go through all components */ |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * snd_soc_set_runtime_hwparams - set the runtime hardware parameters |
| * @substream: the pcm substream |
| * @hw: the hardware parameters |
| * |
| * Sets the substream runtime hardware parameters. |
| */ |
| int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, |
| const struct snd_pcm_hardware *hw) |
| { |
| substream->runtime->hw = *hw; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); |
| |
| /* DPCM stream event, send event to FE and all active BEs. */ |
| int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, |
| int event) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| snd_soc_dpcm_mutex_assert_held(fe); |
| |
| for_each_dpcm_be(fe, dir, dpcm) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| |
| dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", |
| be->dai_link->name, event, dir); |
| |
| if ((event == SND_SOC_DAPM_STREAM_STOP) && |
| (be->dpcm[dir].users >= 1)) |
| continue; |
| |
| snd_soc_dapm_stream_event(be, dir, event); |
| } |
| |
| snd_soc_dapm_stream_event(fe, dir, event); |
| |
| return 0; |
| } |
| |
| static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, |
| struct snd_pcm_hw_params *params) |
| { |
| if (params) { |
| dai->rate = params_rate(params); |
| dai->channels = params_channels(params); |
| dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); |
| } else { |
| dai->rate = 0; |
| dai->channels = 0; |
| dai->sample_bits = 0; |
| } |
| } |
| |
| static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *soc_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| if (!snd_soc_dai_active(soc_dai)) |
| return 0; |
| |
| #define __soc_pcm_apply_symmetry(name, NAME) \ |
| if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ |
| rtd->dai_link->symmetric_##name)) { \ |
| dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ |
| #name, soc_dai->name); \ |
| \ |
| ret = snd_pcm_hw_constraint_single(substream->runtime, \ |
| SNDRV_PCM_HW_PARAM_##NAME,\ |
| soc_dai->name); \ |
| if (ret < 0) { \ |
| dev_err(soc_dai->dev, \ |
| "ASoC: Unable to apply %s constraint: %d\n",\ |
| #name, ret); \ |
| return ret; \ |
| } \ |
| } |
| |
| __soc_pcm_apply_symmetry(rate, RATE); |
| __soc_pcm_apply_symmetry(channels, CHANNELS); |
| __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); |
| |
| return 0; |
| } |
| |
| static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_dai d; |
| struct snd_soc_dai *dai; |
| struct snd_soc_dai *cpu_dai; |
| unsigned int symmetry, i; |
| |
| d.name = __func__; |
| soc_pcm_set_dai_params(&d, params); |
| |
| #define __soc_pcm_params_symmetry(xxx) \ |
| symmetry = rtd->dai_link->symmetric_##xxx; \ |
| for_each_rtd_dais(rtd, i, dai) \ |
| symmetry |= dai->driver->symmetric_##xxx; \ |
| \ |
| if (symmetry) \ |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ |
| if (!snd_soc_dai_is_dummy(cpu_dai) && \ |
| cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ |
| dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ |
| #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ |
| return -EINVAL; \ |
| } |
| |
| /* reject unmatched parameters when applying symmetry */ |
| __soc_pcm_params_symmetry(rate); |
| __soc_pcm_params_symmetry(channels); |
| __soc_pcm_params_symmetry(sample_bits); |
| |
| return 0; |
| } |
| |
| static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_dai_link *link = rtd->dai_link; |
| struct snd_soc_dai *dai; |
| unsigned int symmetry, i; |
| |
| symmetry = link->symmetric_rate || |
| link->symmetric_channels || |
| link->symmetric_sample_bits; |
| |
| for_each_rtd_dais(rtd, i, dai) |
| symmetry = symmetry || |
| dai->driver->symmetric_rate || |
| dai->driver->symmetric_channels || |
| dai->driver->symmetric_sample_bits; |
| |
| if (symmetry) |
| substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; |
| } |
| |
| static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| if (!bits) |
| return; |
| |
| ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); |
| if (ret != 0) |
| dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", |
| bits, ret); |
| } |
| |
| static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_dai *cpu_dai; |
| struct snd_soc_dai *codec_dai; |
| int stream = substream->stream; |
| int i; |
| unsigned int bits = 0, cpu_bits = 0; |
| |
| for_each_rtd_codec_dais(rtd, i, codec_dai) { |
| const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); |
| |
| if (pcm_codec->sig_bits == 0) { |
| bits = 0; |
| break; |
| } |
| bits = max(pcm_codec->sig_bits, bits); |
| } |
| |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) { |
| const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); |
| |
| if (pcm_cpu->sig_bits == 0) { |
| cpu_bits = 0; |
| break; |
| } |
| cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); |
| } |
| |
| soc_pcm_set_msb(substream, bits); |
| soc_pcm_set_msb(substream, cpu_bits); |
| } |
| |
| static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) |
| { |
| hw->rates = UINT_MAX; |
| hw->rate_min = 0; |
| hw->rate_max = UINT_MAX; |
| hw->channels_min = 0; |
| hw->channels_max = UINT_MAX; |
| hw->formats = ULLONG_MAX; |
| } |
| |
| static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, |
| const struct snd_soc_pcm_stream *p) |
| { |
| hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); |
| |
| /* setup hw->rate_min/max via hw->rates first */ |
| snd_pcm_hw_limit_rates(hw); |
| |
| /* update hw->rate_min/max by snd_soc_pcm_stream */ |
| hw->rate_min = max(hw->rate_min, p->rate_min); |
| hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); |
| } |
| |
| static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, |
| const struct snd_soc_pcm_stream *p) |
| { |
| hw->channels_min = max(hw->channels_min, p->channels_min); |
| hw->channels_max = min(hw->channels_max, p->channels_max); |
| } |
| |
| static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, |
| const struct snd_soc_pcm_stream *p) |
| { |
| hw->formats &= p->formats; |
| } |
| |
| static void soc_pcm_hw_update_subformat(struct snd_pcm_hardware *hw, |
| const struct snd_soc_pcm_stream *p) |
| { |
| hw->subformats &= p->subformats; |
| } |
| |
| /** |
| * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream |
| * @rtd: ASoC PCM runtime |
| * @hw: PCM hardware parameters (output) |
| * @stream: Direction of the PCM stream |
| * |
| * Calculates the subset of stream parameters supported by all DAIs |
| * associated with the PCM stream. |
| */ |
| int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_hardware *hw, int stream) |
| { |
| struct snd_soc_dai *codec_dai; |
| struct snd_soc_dai *cpu_dai; |
| const struct snd_soc_pcm_stream *codec_stream; |
| const struct snd_soc_pcm_stream *cpu_stream; |
| unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; |
| int i; |
| |
| soc_pcm_hw_init(hw); |
| |
| /* first calculate min/max only for CPUs in the DAI link */ |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) { |
| |
| /* |
| * Skip CPUs which don't support the current stream type. |
| * Otherwise, since the rate, channel, and format values will |
| * zero in that case, we would have no usable settings left, |
| * causing the resulting setup to fail. |
| */ |
| if (!snd_soc_dai_stream_valid(cpu_dai, stream)) |
| continue; |
| |
| cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); |
| |
| soc_pcm_hw_update_chan(hw, cpu_stream); |
| soc_pcm_hw_update_rate(hw, cpu_stream); |
| soc_pcm_hw_update_format(hw, cpu_stream); |
| soc_pcm_hw_update_subformat(hw, cpu_stream); |
| } |
| cpu_chan_min = hw->channels_min; |
| cpu_chan_max = hw->channels_max; |
| |
| /* second calculate min/max only for CODECs in the DAI link */ |
| for_each_rtd_codec_dais(rtd, i, codec_dai) { |
| |
| /* |
| * Skip CODECs which don't support the current stream type. |
| * Otherwise, since the rate, channel, and format values will |
| * zero in that case, we would have no usable settings left, |
| * causing the resulting setup to fail. |
| */ |
| if (!snd_soc_dai_stream_valid(codec_dai, stream)) |
| continue; |
| |
| codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); |
| |
| soc_pcm_hw_update_chan(hw, codec_stream); |
| soc_pcm_hw_update_rate(hw, codec_stream); |
| soc_pcm_hw_update_format(hw, codec_stream); |
| soc_pcm_hw_update_subformat(hw, codec_stream); |
| } |
| |
| /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ |
| if (!hw->channels_min) |
| return -EINVAL; |
| |
| /* |
| * chan min/max cannot be enforced if there are multiple CODEC DAIs |
| * connected to CPU DAI(s), use CPU DAI's directly and let |
| * channel allocation be fixed up later |
| */ |
| if (rtd->dai_link->num_codecs > 1) { |
| hw->channels_min = cpu_chan_min; |
| hw->channels_max = cpu_chan_max; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); |
| |
| static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_hardware *hw = &substream->runtime->hw; |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| u64 formats = hw->formats; |
| |
| /* |
| * At least one CPU and one CODEC should match. Otherwise, we should |
| * have bailed out on a higher level, since there would be no CPU or |
| * CODEC to support the transfer direction in that case. |
| */ |
| snd_soc_runtime_calc_hw(rtd, hw, substream->stream); |
| |
| if (formats) |
| hw->formats &= formats; |
| } |
| |
| static int soc_pcm_components_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_component *component; |
| int i, ret = 0; |
| |
| for_each_rtd_components(rtd, i, component) { |
| ret = snd_soc_component_module_get_when_open(component, substream); |
| if (ret < 0) |
| break; |
| |
| ret = snd_soc_component_open(component, substream); |
| if (ret < 0) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int soc_pcm_components_close(struct snd_pcm_substream *substream, |
| int rollback) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_component *component; |
| int i, ret = 0; |
| |
| for_each_rtd_components(rtd, i, component) { |
| int r = snd_soc_component_close(component, substream, rollback); |
| if (r < 0) |
| ret = r; /* use last ret */ |
| |
| snd_soc_component_module_put_when_close(component, substream, rollback); |
| } |
| |
| return ret; |
| } |
| |
| static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream, int rollback) |
| { |
| struct snd_soc_component *component; |
| struct snd_soc_dai *dai; |
| int i; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| if (!rollback) { |
| snd_soc_runtime_deactivate(rtd, substream->stream); |
| |
| /* Make sure DAI parameters cleared if the DAI becomes inactive */ |
| for_each_rtd_dais(rtd, i, dai) { |
| if (snd_soc_dai_active(dai) == 0 && |
| (dai->rate || dai->channels || dai->sample_bits)) |
| soc_pcm_set_dai_params(dai, NULL); |
| } |
| } |
| |
| for_each_rtd_dais_reverse(rtd, i, dai) |
| snd_soc_dai_shutdown(dai, substream, rollback); |
| |
| snd_soc_link_shutdown(substream, rollback); |
| |
| soc_pcm_components_close(substream, rollback); |
| |
| snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); |
| |
| for_each_rtd_components(rtd, i, component) |
| if (!snd_soc_component_active(component)) |
| pinctrl_pm_select_sleep_state(component->dev); |
| |
| return 0; |
| } |
| |
| /* |
| * Called by ALSA when a PCM substream is closed. Private data can be |
| * freed here. The cpu DAI, codec DAI, machine and components are also |
| * shutdown. |
| */ |
| static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream) |
| { |
| return soc_pcm_clean(rtd, substream, 0); |
| } |
| |
| /* PCM close ops for non-DPCM streams */ |
| static int soc_pcm_close(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| |
| snd_soc_dpcm_mutex_lock(rtd); |
| __soc_pcm_close(rtd, substream); |
| snd_soc_dpcm_mutex_unlock(rtd); |
| return 0; |
| } |
| |
| static int soc_hw_sanity_check(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_pcm_hardware *hw = &substream->runtime->hw; |
| const char *name_cpu = soc_cpu_dai_name(rtd); |
| const char *name_codec = soc_codec_dai_name(rtd); |
| const char *err_msg; |
| struct device *dev = rtd->dev; |
| |
| err_msg = "rates"; |
| if (!hw->rates) |
| goto config_err; |
| |
| err_msg = "formats"; |
| if (!hw->formats) |
| goto config_err; |
| |
| err_msg = "channels"; |
| if (!hw->channels_min || !hw->channels_max || |
| hw->channels_min > hw->channels_max) |
| goto config_err; |
| |
| dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, |
| name_cpu); |
| dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); |
| dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, |
| hw->channels_max); |
| dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, |
| hw->rate_max); |
| |
| return 0; |
| |
| config_err: |
| dev_err(dev, "ASoC: %s <-> %s No matching %s\n", |
| name_codec, name_cpu, err_msg); |
| return -EINVAL; |
| } |
| |
| /* |
| * Called by ALSA when a PCM substream is opened, the runtime->hw record is |
| * then initialized and any private data can be allocated. This also calls |
| * startup for the cpu DAI, component, machine and codec DAI. |
| */ |
| static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_component *component; |
| struct snd_soc_dai *dai; |
| int i, ret = 0; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| for_each_rtd_components(rtd, i, component) |
| pinctrl_pm_select_default_state(component->dev); |
| |
| ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); |
| if (ret < 0) |
| goto err; |
| |
| ret = soc_pcm_components_open(substream); |
| if (ret < 0) |
| goto err; |
| |
| ret = snd_soc_link_startup(substream); |
| if (ret < 0) |
| goto err; |
| |
| /* startup the audio subsystem */ |
| for_each_rtd_dais(rtd, i, dai) { |
| ret = snd_soc_dai_startup(dai, substream); |
| if (ret < 0) |
| goto err; |
| } |
| |
| /* Dynamic PCM DAI links compat checks use dynamic capabilities */ |
| if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) |
| goto dynamic; |
| |
| /* Check that the codec and cpu DAIs are compatible */ |
| soc_pcm_init_runtime_hw(substream); |
| |
| soc_pcm_update_symmetry(substream); |
| |
| ret = soc_hw_sanity_check(substream); |
| if (ret < 0) |
| goto err; |
| |
| soc_pcm_apply_msb(substream); |
| |
| /* Symmetry only applies if we've already got an active stream. */ |
| for_each_rtd_dais(rtd, i, dai) { |
| ret = soc_pcm_apply_symmetry(substream, dai); |
| if (ret != 0) |
| goto err; |
| } |
| dynamic: |
| snd_soc_runtime_activate(rtd, substream->stream); |
| ret = 0; |
| err: |
| if (ret < 0) |
| soc_pcm_clean(rtd, substream, 1); |
| |
| return soc_pcm_ret(rtd, ret); |
| } |
| |
| /* PCM open ops for non-DPCM streams */ |
| static int soc_pcm_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| snd_soc_dpcm_mutex_lock(rtd); |
| ret = __soc_pcm_open(rtd, substream); |
| snd_soc_dpcm_mutex_unlock(rtd); |
| return ret; |
| } |
| |
| /* |
| * Called by ALSA when the PCM substream is prepared, can set format, sample |
| * rate, etc. This function is non atomic and can be called multiple times, |
| * it can refer to the runtime info. |
| */ |
| static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_dai *dai; |
| int i, ret = 0; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| ret = snd_soc_link_prepare(substream); |
| if (ret < 0) |
| goto out; |
| |
| ret = snd_soc_pcm_component_prepare(substream); |
| if (ret < 0) |
| goto out; |
| |
| ret = snd_soc_pcm_dai_prepare(substream); |
| if (ret < 0) |
| goto out; |
| |
| /* cancel any delayed stream shutdown that is pending */ |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| rtd->pop_wait) { |
| rtd->pop_wait = 0; |
| cancel_delayed_work(&rtd->delayed_work); |
| } |
| |
| snd_soc_dapm_stream_event(rtd, substream->stream, |
| SND_SOC_DAPM_STREAM_START); |
| |
| for_each_rtd_dais(rtd, i, dai) { |
| if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) |
| snd_soc_dai_digital_mute(dai, 0, substream->stream); |
| } |
| |
| out: |
| return soc_pcm_ret(rtd, ret); |
| } |
| |
| /* PCM prepare ops for non-DPCM streams */ |
| static int soc_pcm_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| snd_soc_dpcm_mutex_lock(rtd); |
| ret = __soc_pcm_prepare(rtd, substream); |
| snd_soc_dpcm_mutex_unlock(rtd); |
| return ret; |
| } |
| |
| static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, |
| unsigned int mask) |
| { |
| struct snd_interval *interval; |
| int channels = hweight_long(mask); |
| |
| interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| interval->min = channels; |
| interval->max = channels; |
| } |
| |
| static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream, int rollback) |
| { |
| struct snd_soc_dai *dai; |
| int i; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| /* clear the corresponding DAIs parameters when going to be inactive */ |
| for_each_rtd_dais(rtd, i, dai) { |
| if (snd_soc_dai_active(dai) == 1) |
| soc_pcm_set_dai_params(dai, NULL); |
| |
| if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { |
| if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) |
| snd_soc_dai_digital_mute(dai, 1, substream->stream); |
| } |
| } |
| |
| /* run the stream event */ |
| snd_soc_dapm_stream_stop(rtd, substream->stream); |
| |
| /* free any machine hw params */ |
| snd_soc_link_hw_free(substream, rollback); |
| |
| /* free any component resources */ |
| snd_soc_pcm_component_hw_free(substream, rollback); |
| |
| /* now free hw params for the DAIs */ |
| for_each_rtd_dais(rtd, i, dai) |
| if (snd_soc_dai_stream_valid(dai, substream->stream)) |
| snd_soc_dai_hw_free(dai, substream, rollback); |
| |
| return 0; |
| } |
| |
| /* |
| * Frees resources allocated by hw_params, can be called multiple times |
| */ |
| static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream) |
| { |
| return soc_pcm_hw_clean(rtd, substream, 0); |
| } |
| |
| /* hw_free PCM ops for non-DPCM streams */ |
| static int soc_pcm_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| snd_soc_dpcm_mutex_lock(rtd); |
| ret = __soc_pcm_hw_free(rtd, substream); |
| snd_soc_dpcm_mutex_unlock(rtd); |
| return ret; |
| } |
| |
| /* |
| * Called by ALSA when the hardware params are set by application. This |
| * function can also be called multiple times and can allocate buffers |
| * (using snd_pcm_lib_* ). It's non-atomic. |
| */ |
| static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_dai *cpu_dai; |
| struct snd_soc_dai *codec_dai; |
| struct snd_pcm_hw_params tmp_params; |
| int i, ret = 0; |
| |
| snd_soc_dpcm_mutex_assert_held(rtd); |
| |
| ret = soc_pcm_params_symmetry(substream, params); |
| if (ret) |
| goto out; |
| |
| ret = snd_soc_link_hw_params(substream, params); |
| if (ret < 0) |
| goto out; |
| |
| for_each_rtd_codec_dais(rtd, i, codec_dai) { |
| unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); |
| |
| /* |
| * Skip CODECs which don't support the current stream type, |
| * the idea being that if a CODEC is not used for the currently |
| * set up transfer direction, it should not need to be |
| * configured, especially since the configuration used might |
| * not even be supported by that CODEC. There may be cases |
| * however where a CODEC needs to be set up although it is |
| * actually not being used for the transfer, e.g. if a |
| * capture-only CODEC is acting as an LRCLK and/or BCLK master |
| * for the DAI link including a playback-only CODEC. |
| * If this becomes necessary, we will have to augment the |
| * machine driver setup with information on how to act, so |
| * we can do the right thing here. |
| */ |
| if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) |
| continue; |
| |
| /* copy params for each codec */ |
| tmp_params = *params; |
| |
| /* fixup params based on TDM slot masks */ |
| if (tdm_mask) |
| soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); |
| |
| ret = snd_soc_dai_hw_params(codec_dai, substream, |
| &tmp_params); |
| if(ret < 0) |
| goto out; |
| |
| soc_pcm_set_dai_params(codec_dai, &tmp_params); |
| snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); |
| } |
| |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) { |
| struct snd_soc_dai_link_ch_map *ch_maps; |
| unsigned int ch_mask = 0; |
| int j; |
| |
| /* |
| * Skip CPUs which don't support the current stream |
| * type. See soc_pcm_init_runtime_hw() for more details |
| */ |
| if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) |
| continue; |
| |
| /* copy params for each cpu */ |
| tmp_params = *params; |
| |
| /* |
| * construct cpu channel mask by combining ch_mask of each |
| * codec which maps to the cpu. |
| * see |
| * soc.h :: [dai_link->ch_maps Image sample] |
| */ |
| for_each_rtd_ch_maps(rtd, j, ch_maps) |
| if (ch_maps->cpu == i) |
| ch_mask |= ch_maps->ch_mask; |
| |
| /* fixup cpu channel number */ |
| if (ch_mask) |
| soc_pcm_codec_params_fixup(&tmp_params, ch_mask); |
| |
| ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); |
| if (ret < 0) |
| goto out; |
| |
| /* store the parameters for each DAI */ |
| soc_pcm_set_dai_params(cpu_dai, &tmp_params); |
| snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); |
| } |
| |
| ret = snd_soc_pcm_component_hw_params(substream, params); |
| out: |
| if (ret < 0) |
| soc_pcm_hw_clean(rtd, substream, 1); |
| |
| return soc_pcm_ret(rtd, ret); |
| } |
| |
| /* hw_params PCM ops for non-DPCM streams */ |
| static int soc_pcm_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| snd_soc_dpcm_mutex_lock(rtd); |
| ret = __soc_pcm_hw_params(rtd, substream, params); |
| snd_soc_dpcm_mutex_unlock(rtd); |
| return ret; |
| } |
| |
| #define TRIGGER_MAX 3 |
| static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { |
| [SND_SOC_TRIGGER_ORDER_DEFAULT] = { |
| snd_soc_link_trigger, |
| snd_soc_pcm_component_trigger, |
| snd_soc_pcm_dai_trigger, |
| }, |
| [SND_SOC_TRIGGER_ORDER_LDC] = { |
| snd_soc_link_trigger, |
| snd_soc_pcm_dai_trigger, |
| snd_soc_pcm_component_trigger, |
| }, |
| }; |
| |
| static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
| struct snd_soc_component *component; |
| int ret = 0, r = 0, i; |
| int rollback = 0; |
| int start = 0, stop = 0; |
| |
| /* |
| * select START/STOP sequence |
| */ |
| for_each_rtd_components(rtd, i, component) { |
| if (component->driver->trigger_start) |
| start = component->driver->trigger_start; |
| if (component->driver->trigger_stop) |
| stop = component->driver->trigger_stop; |
| } |
| if (rtd->dai_link->trigger_start) |
| start = rtd->dai_link->trigger_start; |
| if (rtd->dai_link->trigger_stop) |
| stop = rtd->dai_link->trigger_stop; |
| |
| if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || |
| stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) |
| return -EINVAL; |
| |
| /* |
| * START |
| */ |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| for (i = 0; i < TRIGGER_MAX; i++) { |
| r = trigger[start][i](substream, cmd, 0); |
| if (r < 0) |
| break; |
| } |
| } |
| |
| /* |
| * Rollback if START failed |
| * find correspond STOP command |
| */ |
| if (r < 0) { |
| rollback = 1; |
| ret = r; |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| cmd = SNDRV_PCM_TRIGGER_STOP; |
| break; |
| case SNDRV_PCM_TRIGGER_RESUME: |
| cmd = SNDRV_PCM_TRIGGER_SUSPEND; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; |
| break; |
| } |
| } |
| |
| /* |
| * STOP |
| */ |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| for (i = TRIGGER_MAX; i > 0; i--) { |
| r = trigger[stop][i - 1](substream, cmd, rollback); |
| if (r < 0) |
| ret = r; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * soc level wrapper for pointer callback |
| * If cpu_dai, codec_dai, component driver has the delay callback, then |
| * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). |
| */ |
| static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| snd_pcm_uframes_t offset = 0; |
| snd_pcm_sframes_t codec_delay = 0; |
| snd_pcm_sframes_t cpu_delay = 0; |
| |
| offset = snd_soc_pcm_component_pointer(substream); |
| |
| /* should be called *after* snd_soc_pcm_component_pointer() */ |
| snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); |
| snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); |
| |
| runtime->delay = cpu_delay + codec_delay; |
| |
| return offset; |
| } |
| |
| /* connect a FE and BE */ |
| static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_pcm_substream *fe_substream; |
| struct snd_pcm_substream *be_substream; |
| struct snd_soc_dpcm *dpcm; |
| |
| snd_soc_dpcm_mutex_assert_held(fe); |
| |
| /* only add new dpcms */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| if (dpcm->be == be && dpcm->fe == fe) |
| return 0; |
| } |
| |
| fe_substream = snd_soc_dpcm_get_substream(fe, stream); |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { |
| dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", |
| __func__); |
| return -EINVAL; |
| } |
| if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { |
| dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); |
| be_substream->pcm->nonatomic = 1; |
| } |
| |
| dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); |
| if (!dpcm) |
| return -ENOMEM; |
| |
| dpcm->be = be; |
| dpcm->fe = fe; |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; |
| snd_soc_dpcm_stream_lock_irq(fe, stream); |
| list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); |
| list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); |
| snd_soc_dpcm_stream_unlock_irq(fe, stream); |
| |
| dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name, |
| stream ? "<-" : "->", be->dai_link->name); |
| |
| dpcm_create_debugfs_state(dpcm, stream); |
| |
| return 1; |
| } |
| |
| /* reparent a BE onto another FE */ |
| static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| struct snd_pcm_substream *fe_substream, *be_substream; |
| |
| /* reparent if BE is connected to other FEs */ |
| if (!be->dpcm[stream].users) |
| return; |
| |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| if (!be_substream) |
| return; |
| |
| for_each_dpcm_fe(be, stream, dpcm) { |
| if (dpcm->fe == fe) |
| continue; |
| |
| dev_dbg(fe->dev, "reparent %s path %s %s %s\n", |
| stream ? "capture" : "playback", |
| dpcm->fe->dai_link->name, |
| stream ? "<-" : "->", dpcm->be->dai_link->name); |
| |
| fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); |
| be_substream->runtime = fe_substream->runtime; |
| break; |
| } |
| } |
| |
| /* disconnect a BE and FE */ |
| void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm, *d; |
| LIST_HEAD(deleted_dpcms); |
| |
| snd_soc_dpcm_mutex_assert_held(fe); |
| |
| snd_soc_dpcm_stream_lock_irq(fe, stream); |
| for_each_dpcm_be_safe(fe, stream, dpcm, d) { |
| dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", |
| stream ? "capture" : "playback", |
| dpcm->be->dai_link->name); |
| |
| if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) |
| continue; |
| |
| dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name, |
| stream ? "<-" : "->", dpcm->be->dai_link->name); |
| |
| /* BEs still alive need new FE */ |
| dpcm_be_reparent(fe, dpcm->be, stream); |
| |
| list_del(&dpcm->list_be); |
| list_move(&dpcm->list_fe, &deleted_dpcms); |
| } |
| snd_soc_dpcm_stream_unlock_irq(fe, stream); |
| |
| while (!list_empty(&deleted_dpcms)) { |
| dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, |
| list_fe); |
| list_del(&dpcm->list_fe); |
| dpcm_remove_debugfs_state(dpcm); |
| kfree(dpcm); |
| } |
| } |
| |
| /* get BE for DAI widget and stream */ |
| static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, |
| struct snd_soc_dapm_widget *widget, int stream) |
| { |
| struct snd_soc_pcm_runtime *be; |
| struct snd_soc_dapm_widget *w; |
| struct snd_soc_dai *dai; |
| int i; |
| |
| dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); |
| |
| for_each_card_rtds(card, be) { |
| |
| if (!be->dai_link->no_pcm) |
| continue; |
| |
| if (!snd_soc_dpcm_get_substream(be, stream)) |
| continue; |
| |
| for_each_rtd_dais(be, i, dai) { |
| w = snd_soc_dai_get_widget(dai, stream); |
| |
| dev_dbg(card->dev, "ASoC: try BE : %s\n", |
| w ? w->name : "(not set)"); |
| |
| if (w == widget) |
| return be; |
| } |
| } |
| |
| /* Widget provided is not a BE */ |
| return NULL; |
| } |
| |
| int widget_in_list(struct snd_soc_dapm_widget_list *list, |
| struct snd_soc_dapm_widget *widget) |
| { |
| struct snd_soc_dapm_widget *w; |
| int i; |
| |
| for_each_dapm_widgets(list, i, w) |
| if (widget == w) |
| return 1; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(widget_in_list); |
| |
| bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) |
| { |
| struct snd_soc_card *card = widget->dapm->card; |
| struct snd_soc_pcm_runtime *rtd; |
| int stream; |
| |
| /* adjust dir to stream */ |
| if (dir == SND_SOC_DAPM_DIR_OUT) |
| stream = SNDRV_PCM_STREAM_PLAYBACK; |
| else |
| stream = SNDRV_PCM_STREAM_CAPTURE; |
| |
| rtd = dpcm_get_be(card, widget, stream); |
| if (rtd) |
| return true; |
| |
| return false; |
| } |
| EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); |
| |
| int dpcm_path_get(struct snd_soc_pcm_runtime *fe, |
| int stream, struct snd_soc_dapm_widget_list **list) |
| { |
| struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); |
| int paths; |
| |
| if (fe->dai_link->num_cpus > 1) { |
| dev_err(fe->dev, |
| "%s doesn't support Multi CPU yet\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* get number of valid DAI paths and their widgets */ |
| paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, |
| fe->card->component_chaining ? |
| NULL : dpcm_end_walk_at_be); |
| |
| if (paths > 0) |
| dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, |
| stream ? "capture" : "playback"); |
| else if (paths == 0) |
| dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, |
| stream ? "capture" : "playback"); |
| |
| return paths; |
| } |
| |
| void dpcm_path_put(struct snd_soc_dapm_widget_list **list) |
| { |
| snd_soc_dapm_dai_free_widgets(list); |
| } |
| |
| static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, |
| struct snd_soc_dapm_widget_list *list) |
| { |
| struct snd_soc_dai *dai; |
| unsigned int i; |
| |
| /* is there a valid DAI widget for this BE */ |
| for_each_rtd_dais(dpcm->be, i, dai) { |
| struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); |
| |
| /* |
| * The BE is pruned only if none of the dai |
| * widgets are in the active list. |
| */ |
| if (widget && widget_in_list(list, widget)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, |
| struct snd_soc_dapm_widget_list **list_) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int prune = 0; |
| |
| /* Destroy any old FE <--> BE connections */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| if (dpcm_be_is_active(dpcm, stream, *list_)) |
| continue; |
| |
| dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", |
| stream ? "capture" : "playback", |
| dpcm->be->dai_link->name, fe->dai_link->name); |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); |
| prune++; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); |
| return prune; |
| } |
| |
| static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, |
| struct snd_soc_dapm_widget_list **list_) |
| { |
| struct snd_soc_card *card = fe->card; |
| struct snd_soc_dapm_widget_list *list = *list_; |
| struct snd_soc_pcm_runtime *be; |
| struct snd_soc_dapm_widget *widget; |
| struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); |
| int i, new = 0, err; |
| |
| /* don't connect if FE is not running */ |
| if (!fe_substream->runtime && !fe->fe_compr) |
| return new; |
| |
| /* Create any new FE <--> BE connections */ |
| for_each_dapm_widgets(list, i, widget) { |
| |
| switch (widget->id) { |
| case snd_soc_dapm_dai_in: |
| if (stream != SNDRV_PCM_STREAM_PLAYBACK) |
| continue; |
| break; |
| case snd_soc_dapm_dai_out: |
| if (stream != SNDRV_PCM_STREAM_CAPTURE) |
| continue; |
| break; |
| default: |
| continue; |
| } |
| |
| /* is there a valid BE rtd for this widget */ |
| be = dpcm_get_be(card, widget, stream); |
| if (!be) { |
| dev_dbg(fe->dev, "ASoC: no BE found for %s\n", |
| widget->name); |
| continue; |
| } |
| |
| /* |
| * Filter for systems with 'component_chaining' enabled. |
| * This helps to avoid unnecessary re-configuration of an |
| * already active BE on such systems. |
| */ |
| if (fe->card->component_chaining && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) |
| continue; |
| |
| /* newly connected FE and BE */ |
| err = dpcm_be_connect(fe, be, stream); |
| if (err < 0) { |
| dev_err(fe->dev, "ASoC: can't connect %s\n", |
| widget->name); |
| break; |
| } else if (err == 0) /* already connected */ |
| continue; |
| |
| /* new */ |
| dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); |
| new++; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); |
| return new; |
| } |
| |
| /* |
| * Find the corresponding BE DAIs that source or sink audio to this |
| * FE substream. |
| */ |
| int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, |
| int stream, struct snd_soc_dapm_widget_list **list, int new) |
| { |
| if (new) |
| return dpcm_add_paths(fe, stream, list); |
| else |
| return dpcm_prune_paths(fe, stream, list); |
| } |
| |
| void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| for_each_dpcm_be(fe, stream, dpcm) |
| dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); |
| } |
| |
| void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, |
| int do_hw_free, struct snd_soc_dpcm *last) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* disable any enabled and non active backends */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| if (dpcm == last) |
| return; |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if (be->dpcm[stream].users == 0) { |
| dev_err(be->dev, "ASoC: no users %s at close - state %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| continue; |
| } |
| |
| if (--be->dpcm[stream].users != 0) |
| continue; |
| |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { |
| if (!do_hw_free) |
| continue; |
| |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { |
| __soc_pcm_hw_free(be, be_substream); |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; |
| } |
| } |
| |
| __soc_pcm_close(be, be_substream); |
| be_substream->runtime = NULL; |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| } |
| } |
| |
| int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); |
| struct snd_soc_pcm_runtime *be; |
| struct snd_soc_dpcm *dpcm; |
| int err, count = 0; |
| |
| /* only startup BE DAIs that are either sinks or sources to this FE DAI */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_pcm_substream *be_substream; |
| |
| be = dpcm->be; |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!be_substream) { |
| dev_err(be->dev, "ASoC: no backend %s stream\n", |
| stream ? "capture" : "playback"); |
| continue; |
| } |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* first time the dpcm is open ? */ |
| if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { |
| dev_err(be->dev, "ASoC: too many users %s at open %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| continue; |
| } |
| |
| if (be->dpcm[stream].users++ != 0) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: open %s BE %s\n", |
| stream ? "capture" : "playback", be->dai_link->name); |
| |
| be_substream->runtime = fe_substream->runtime; |
| err = __soc_pcm_open(be, be_substream); |
| if (err < 0) { |
| be->dpcm[stream].users--; |
| if (be->dpcm[stream].users < 0) |
| dev_err(be->dev, "ASoC: no users %s at unwind %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| goto unwind; |
| } |
| be->dpcm[stream].be_start = 0; |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; |
| count++; |
| } |
| |
| return count; |
| |
| unwind: |
| dpcm_be_dai_startup_rollback(fe, stream, dpcm); |
| |
| return soc_pcm_ret(fe, err); |
| } |
| |
| static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| struct snd_soc_dai *dai; |
| int stream = substream->stream; |
| u64 formats = hw->formats; |
| int i; |
| |
| soc_pcm_hw_init(hw); |
| |
| if (formats) |
| hw->formats &= formats; |
| |
| for_each_rtd_cpu_dais(fe, i, dai) { |
| const struct snd_soc_pcm_stream *cpu_stream; |
| |
| /* |
| * Skip CPUs which don't support the current stream |
| * type. See soc_pcm_init_runtime_hw() for more details |
| */ |
| if (!snd_soc_dai_stream_valid(dai, stream)) |
| continue; |
| |
| cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); |
| |
| soc_pcm_hw_update_rate(hw, cpu_stream); |
| soc_pcm_hw_update_chan(hw, cpu_stream); |
| soc_pcm_hw_update_format(hw, cpu_stream); |
| soc_pcm_hw_update_subformat(hw, cpu_stream); |
| } |
| |
| } |
| |
| static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| struct snd_soc_dpcm *dpcm; |
| struct snd_soc_dai *dai; |
| int stream = substream->stream; |
| |
| if (!fe->dai_link->dpcm_merged_format) |
| return; |
| |
| /* |
| * It returns merged BE codec format |
| * if FE want to use it (= dpcm_merged_format) |
| */ |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| const struct snd_soc_pcm_stream *codec_stream; |
| int i; |
| |
| for_each_rtd_codec_dais(be, i, dai) { |
| /* |
| * Skip CODECs which don't support the current stream |
| * type. See soc_pcm_init_runtime_hw() for more details |
| */ |
| if (!snd_soc_dai_stream_valid(dai, stream)) |
| continue; |
| |
| codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); |
| |
| soc_pcm_hw_update_format(hw, codec_stream); |
| soc_pcm_hw_update_subformat(hw, codec_stream); |
| } |
| } |
| } |
| |
| static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| struct snd_soc_dpcm *dpcm; |
| int stream = substream->stream; |
| |
| if (!fe->dai_link->dpcm_merged_chan) |
| return; |
| |
| /* |
| * It returns merged BE codec channel; |
| * if FE want to use it (= dpcm_merged_chan) |
| */ |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| const struct snd_soc_pcm_stream *cpu_stream; |
| struct snd_soc_dai *dai; |
| int i; |
| |
| for_each_rtd_cpu_dais(be, i, dai) { |
| /* |
| * Skip CPUs which don't support the current stream |
| * type. See soc_pcm_init_runtime_hw() for more details |
| */ |
| if (!snd_soc_dai_stream_valid(dai, stream)) |
| continue; |
| |
| cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); |
| |
| soc_pcm_hw_update_chan(hw, cpu_stream); |
| } |
| |
| /* |
| * chan min/max cannot be enforced if there are multiple CODEC |
| * DAIs connected to a single CPU DAI, use CPU DAI's directly |
| */ |
| if (be->dai_link->num_codecs == 1) { |
| const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( |
| snd_soc_rtd_to_codec(be, 0), stream); |
| |
| soc_pcm_hw_update_chan(hw, codec_stream); |
| } |
| } |
| } |
| |
| static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| struct snd_soc_dpcm *dpcm; |
| int stream = substream->stream; |
| |
| if (!fe->dai_link->dpcm_merged_rate) |
| return; |
| |
| /* |
| * It returns merged BE codec channel; |
| * if FE want to use it (= dpcm_merged_chan) |
| */ |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| const struct snd_soc_pcm_stream *pcm; |
| struct snd_soc_dai *dai; |
| int i; |
| |
| for_each_rtd_dais(be, i, dai) { |
| /* |
| * Skip DAIs which don't support the current stream |
| * type. See soc_pcm_init_runtime_hw() for more details |
| */ |
| if (!snd_soc_dai_stream_valid(dai, stream)) |
| continue; |
| |
| pcm = snd_soc_dai_get_pcm_stream(dai, stream); |
| |
| soc_pcm_hw_update_rate(hw, pcm); |
| } |
| } |
| } |
| |
| static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, |
| int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); |
| struct snd_soc_dai *fe_cpu_dai; |
| int err = 0; |
| int i; |
| |
| /* apply symmetry for FE */ |
| soc_pcm_update_symmetry(fe_substream); |
| |
| for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { |
| /* Symmetry only applies if we've got an active stream. */ |
| err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); |
| if (err < 0) |
| goto error; |
| } |
| |
| /* apply symmetry for BE */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| struct snd_soc_pcm_runtime *rtd; |
| struct snd_soc_dai *dai; |
| |
| /* A backend may not have the requested substream */ |
| if (!be_substream) |
| continue; |
| |
| rtd = snd_soc_substream_to_rtd(be_substream); |
| if (rtd->dai_link->be_hw_params_fixup) |
| continue; |
| |
| soc_pcm_update_symmetry(be_substream); |
| |
| /* Symmetry only applies if we've got an active stream. */ |
| for_each_rtd_dais(rtd, i, dai) { |
| err = soc_pcm_apply_symmetry(fe_substream, dai); |
| if (err < 0) |
| goto error; |
| } |
| } |
| error: |
| return soc_pcm_ret(fe, err); |
| } |
| |
| static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); |
| int stream = fe_substream->stream, ret = 0; |
| |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); |
| |
| ret = dpcm_be_dai_startup(fe, stream); |
| if (ret < 0) |
| goto be_err; |
| |
| dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); |
| |
| /* start the DAI frontend */ |
| ret = __soc_pcm_open(fe, fe_substream); |
| if (ret < 0) |
| goto unwind; |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; |
| |
| dpcm_runtime_setup_fe(fe_substream); |
| |
| dpcm_runtime_setup_be_format(fe_substream); |
| dpcm_runtime_setup_be_chan(fe_substream); |
| dpcm_runtime_setup_be_rate(fe_substream); |
| |
| ret = dpcm_apply_symmetry(fe_substream, stream); |
| |
| unwind: |
| if (ret < 0) |
| dpcm_be_dai_startup_unwind(fe, stream); |
| be_err: |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| |
| return soc_pcm_ret(fe, ret); |
| } |
| |
| static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int stream = substream->stream; |
| |
| snd_soc_dpcm_mutex_assert_held(fe); |
| |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); |
| |
| /* shutdown the BEs */ |
| dpcm_be_dai_shutdown(fe, stream); |
| |
| dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); |
| |
| /* now shutdown the frontend */ |
| __soc_pcm_close(fe, substream); |
| |
| /* run the stream stop event */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| return 0; |
| } |
| |
| void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* only hw_params backends that are either sinks or sources |
| * to this frontend DAI */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* only free hw when no longer used - check all FEs */ |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| /* do not free hw if this BE is used by other FE */ |
| if (be->dpcm[stream].users > 1) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: hw_free BE %s\n", |
| be->dai_link->name); |
| |
| __soc_pcm_hw_free(be, be_substream); |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; |
| } |
| } |
| |
| static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int stream = substream->stream; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); |
| |
| dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); |
| |
| /* call hw_free on the frontend */ |
| soc_pcm_hw_clean(fe, substream, 0); |
| |
| /* only hw_params backends that are either sinks or sources |
| * to this frontend DAI */ |
| dpcm_be_dai_hw_free(fe, stream); |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| |
| snd_soc_dpcm_mutex_unlock(fe); |
| return 0; |
| } |
| |
| int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_pcm_runtime *be; |
| struct snd_pcm_substream *be_substream; |
| struct snd_soc_dpcm *dpcm; |
| int ret; |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_pcm_hw_params hw_params; |
| |
| be = dpcm->be; |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* copy params for each dpcm */ |
| memcpy(&hw_params, &fe->dpcm[stream].hw_params, |
| sizeof(struct snd_pcm_hw_params)); |
| |
| /* perform any hw_params fixups */ |
| ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); |
| if (ret < 0) |
| goto unwind; |
| |
| /* copy the fixed-up hw params for BE dai */ |
| memcpy(&be->dpcm[stream].hw_params, &hw_params, |
| sizeof(struct snd_pcm_hw_params)); |
| |
| /* only allow hw_params() if no connected FEs are running */ |
| if (!snd_soc_dpcm_can_be_params(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: hw_params BE %s\n", |
| be->dai_link->name); |
| |
| ret = __soc_pcm_hw_params(be, be_substream, &hw_params); |
| if (ret < 0) |
| goto unwind; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; |
| } |
| return 0; |
| |
| unwind: |
| dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", |
| __func__, be->dai_link->name, ret); |
| |
| /* disable any enabled and non active backends */ |
| for_each_dpcm_be_rollback(fe, stream, dpcm) { |
| be = dpcm->be; |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* only allow hw_free() if no connected FEs are running */ |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) |
| continue; |
| |
| __soc_pcm_hw_free(be, be_substream); |
| } |
| |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int ret, stream = substream->stream; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); |
| |
| memcpy(&fe->dpcm[stream].hw_params, params, |
| sizeof(struct snd_pcm_hw_params)); |
| ret = dpcm_be_dai_hw_params(fe, stream); |
| if (ret < 0) |
| goto out; |
| |
| dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", |
| fe->dai_link->name, params_rate(params), |
| params_channels(params), params_format(params)); |
| |
| /* call hw_params on the frontend */ |
| ret = __soc_pcm_hw_params(fe, substream, params); |
| if (ret < 0) |
| dpcm_be_dai_hw_free(fe, stream); |
| else |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; |
| |
| out: |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| snd_soc_dpcm_mutex_unlock(fe); |
| |
| return soc_pcm_ret(fe, ret); |
| } |
| |
| int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, |
| int cmd) |
| { |
| struct snd_soc_pcm_runtime *be; |
| bool pause_stop_transition; |
| struct snd_soc_dpcm *dpcm; |
| unsigned long flags; |
| int ret = 0; |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_pcm_substream *be_substream; |
| |
| be = dpcm->be; |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| goto next; |
| |
| dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", |
| be->dai_link->name, cmd); |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| if (!be->dpcm[stream].be_start && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) |
| goto next; |
| |
| be->dpcm[stream].be_start++; |
| if (be->dpcm[stream].be_start != 1) |
| goto next; |
| |
| if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) |
| ret = soc_pcm_trigger(be_substream, |
| SNDRV_PCM_TRIGGER_PAUSE_RELEASE); |
| else |
| ret = soc_pcm_trigger(be_substream, |
| SNDRV_PCM_TRIGGER_START); |
| if (ret) { |
| be->dpcm[stream].be_start--; |
| goto next; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_RESUME: |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) |
| goto next; |
| |
| be->dpcm[stream].be_start++; |
| if (be->dpcm[stream].be_start != 1) |
| goto next; |
| |
| ret = soc_pcm_trigger(be_substream, cmd); |
| if (ret) { |
| be->dpcm[stream].be_start--; |
| goto next; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| if (!be->dpcm[stream].be_start && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) |
| goto next; |
| |
| fe->dpcm[stream].fe_pause = false; |
| be->dpcm[stream].be_pause--; |
| |
| be->dpcm[stream].be_start++; |
| if (be->dpcm[stream].be_start != 1) |
| goto next; |
| |
| ret = soc_pcm_trigger(be_substream, cmd); |
| if (ret) { |
| be->dpcm[stream].be_start--; |
| goto next; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) |
| goto next; |
| |
| if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) |
| be->dpcm[stream].be_start--; |
| |
| if (be->dpcm[stream].be_start != 0) |
| goto next; |
| |
| pause_stop_transition = false; |
| if (fe->dpcm[stream].fe_pause) { |
| pause_stop_transition = true; |
| fe->dpcm[stream].fe_pause = false; |
| be->dpcm[stream].be_pause--; |
| } |
| |
| if (be->dpcm[stream].be_pause != 0) |
| ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); |
| else |
| ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); |
| |
| if (ret) { |
| if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) |
| be->dpcm[stream].be_start++; |
| if (pause_stop_transition) { |
| fe->dpcm[stream].fe_pause = true; |
| be->dpcm[stream].be_pause++; |
| } |
| goto next; |
| } |
| |
| if (be->dpcm[stream].be_pause != 0) |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; |
| else |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; |
| |
| break; |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) |
| goto next; |
| |
| be->dpcm[stream].be_start--; |
| if (be->dpcm[stream].be_start != 0) |
| goto next; |
| |
| ret = soc_pcm_trigger(be_substream, cmd); |
| if (ret) { |
| be->dpcm[stream].be_start++; |
| goto next; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) |
| goto next; |
| |
| fe->dpcm[stream].fe_pause = true; |
| be->dpcm[stream].be_pause++; |
| |
| be->dpcm[stream].be_start--; |
| if (be->dpcm[stream].be_start != 0) |
| goto next; |
| |
| ret = soc_pcm_trigger(be_substream, cmd); |
| if (ret) { |
| be->dpcm[stream].be_start++; |
| goto next; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; |
| break; |
| } |
| next: |
| snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); |
| if (ret) |
| break; |
| } |
| return soc_pcm_ret(fe, ret); |
| } |
| EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); |
| |
| static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, |
| int cmd, bool fe_first) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int ret; |
| |
| /* call trigger on the frontend before the backend. */ |
| if (fe_first) { |
| dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_trigger(substream, cmd); |
| if (ret < 0) |
| return ret; |
| |
| ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); |
| return ret; |
| } |
| |
| /* call trigger on the frontend after the backend. */ |
| ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); |
| if (ret < 0) |
| return ret; |
| |
| dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_trigger(substream, cmd); |
| |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int stream = substream->stream; |
| int ret = 0; |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| switch (trigger) { |
| case SND_SOC_DPCM_TRIGGER_PRE: |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| case SNDRV_PCM_TRIGGER_DRAIN: |
| ret = dpcm_dai_trigger_fe_be(substream, cmd, true); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| ret = dpcm_dai_trigger_fe_be(substream, cmd, false); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| break; |
| case SND_SOC_DPCM_TRIGGER_POST: |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| case SNDRV_PCM_TRIGGER_DRAIN: |
| ret = dpcm_dai_trigger_fe_be(substream, cmd, false); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| ret = dpcm_dai_trigger_fe_be(substream, cmd, true); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| break; |
| case SND_SOC_DPCM_TRIGGER_BESPOKE: |
| /* bespoke trigger() - handles both FE and BEs */ |
| |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); |
| break; |
| default: |
| dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, |
| fe->dai_link->name); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (ret < 0) { |
| dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", |
| cmd, ret); |
| goto out; |
| } |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; |
| break; |
| } |
| |
| out: |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int stream = substream->stream; |
| |
| /* if FE's runtime_update is already set, we're in race; |
| * process this trigger later at exit |
| */ |
| if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { |
| fe->dpcm[stream].trigger_pending = cmd + 1; |
| return 0; /* delayed, assuming it's successful */ |
| } |
| |
| /* we're alone, let's trigger */ |
| return dpcm_fe_dai_do_trigger(substream, cmd); |
| } |
| |
| int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int ret = 0; |
| |
| for_each_dpcm_be(fe, stream, dpcm) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: prepare BE %s\n", |
| be->dai_link->name); |
| |
| ret = __soc_pcm_prepare(be, be_substream); |
| if (ret < 0) |
| break; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; |
| } |
| |
| return soc_pcm_ret(fe, ret); |
| } |
| |
| static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); |
| int stream = substream->stream, ret = 0; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| |
| dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); |
| |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); |
| |
| /* there is no point preparing this FE if there are no BEs */ |
| if (list_empty(&fe->dpcm[stream].be_clients)) { |
| /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */ |
| dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", |
| fe->dai_link->name); |
| dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", |
| fe->dai_link->name); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = dpcm_be_dai_prepare(fe, stream); |
| if (ret < 0) |
| goto out; |
| |
| /* call prepare on the frontend */ |
| ret = __soc_pcm_prepare(fe, substream); |
| if (ret < 0) |
| goto out; |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; |
| |
| out: |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| snd_soc_dpcm_mutex_unlock(fe); |
| |
| return soc_pcm_ret(fe, ret); |
| } |
| |
| static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_pcm_substream *substream = |
| snd_soc_dpcm_get_substream(fe, stream); |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| int err; |
| |
| dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name); |
| |
| if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { |
| /* call bespoke trigger - FE takes care of all BE triggers */ |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", |
| fe->dai_link->name); |
| |
| err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
| } else { |
| dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", |
| fe->dai_link->name); |
| |
| err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); |
| } |
| |
| dpcm_be_dai_hw_free(fe, stream); |
| |
| dpcm_be_dai_shutdown(fe, stream); |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); |
| |
| return soc_pcm_ret(fe, err); |
| } |
| |
| static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_pcm_substream *substream = |
| snd_soc_dpcm_get_substream(fe, stream); |
| struct snd_soc_dpcm *dpcm; |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| int ret = 0; |
| |
| dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name); |
| |
| /* Only start the BE if the FE is ready */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || |
| fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { |
| dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", |
| fe->dai_link->name, fe->dpcm[stream].state); |
| ret = -EINVAL; |
| goto disconnect; |
| } |
| |
| /* startup must always be called for new BEs */ |
| ret = dpcm_be_dai_startup(fe, stream); |
| if (ret < 0) |
| goto disconnect; |
| |
| /* keep going if FE state is > open */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) |
| return 0; |
| |
| ret = dpcm_be_dai_hw_params(fe, stream); |
| if (ret < 0) |
| goto close; |
| |
| /* keep going if FE state is > hw_params */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) |
| return 0; |
| |
| ret = dpcm_be_dai_prepare(fe, stream); |
| if (ret < 0) |
| goto hw_free; |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); |
| |
| /* keep going if FE state is > prepare */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || |
| fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) |
| return 0; |
| |
| if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { |
| /* call trigger on the frontend - FE takes care of all BE triggers */ |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", |
| fe->dai_link->name); |
| |
| ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); |
| if (ret < 0) |
| goto hw_free; |
| } else { |
| dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", |
| fe->dai_link->name); |
| |
| ret = dpcm_be_dai_trigger(fe, stream, |
| SNDRV_PCM_TRIGGER_START); |
| if (ret < 0) |
| goto hw_free; |
| } |
| |
| return 0; |
| |
| hw_free: |
| dpcm_be_dai_hw_free(fe, stream); |
| close: |
| dpcm_be_dai_shutdown(fe, stream); |
| disconnect: |
| /* disconnect any pending BEs */ |
| for_each_dpcm_be(fe, stream, dpcm) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || |
| be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| } |
| |
| return soc_pcm_ret(fe, ret); |
| } |
| |
| static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) |
| { |
| struct snd_soc_dapm_widget_list *list; |
| int stream; |
| int count, paths; |
| |
| if (!fe->dai_link->dynamic) |
| return 0; |
| |
| if (fe->dai_link->num_cpus > 1) { |
| dev_err(fe->dev, |
| "%s doesn't support Multi CPU yet\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* only check active links */ |
| if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) |
| return 0; |
| |
| /* DAPM sync will call this to update DSP paths */ |
| dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", |
| new ? "new" : "old", fe->dai_link->name); |
| |
| for_each_pcm_streams(stream) { |
| |
| /* skip if FE doesn't have playback/capture capability */ |
| if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || |
| !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) |
| continue; |
| |
| /* skip if FE isn't currently playing/capturing */ |
| if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || |
| !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) |
| continue; |
| |
| paths = dpcm_path_get(fe, stream, &list); |
| if (paths < 0) |
| return paths; |
| |
| /* update any playback/capture paths */ |
| count = dpcm_process_paths(fe, stream, &list, new); |
| if (count) { |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); |
| if (new) |
| dpcm_run_update_startup(fe, stream); |
| else |
| dpcm_run_update_shutdown(fe, stream); |
| dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); |
| |
| dpcm_clear_pending_state(fe, stream); |
| dpcm_be_disconnect(fe, stream); |
| } |
| |
| dpcm_path_put(&list); |
| } |
| |
| return 0; |
| } |
| |
| /* Called by DAPM mixer/mux changes to update audio routing between PCMs and |
| * any DAI links. |
| */ |
| int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) |
| { |
| struct snd_soc_pcm_runtime *fe; |
| int ret = 0; |
| |
| snd_soc_dpcm_mutex_lock(card); |
| /* shutdown all old paths first */ |
| for_each_card_rtds(card, fe) { |
| ret = soc_dpcm_fe_runtime_update(fe, 0); |
| if (ret) |
| goto out; |
| } |
| |
| /* bring new paths up */ |
| for_each_card_rtds(card, fe) { |
| ret = soc_dpcm_fe_runtime_update(fe, 1); |
| if (ret) |
| goto out; |
| } |
| |
| out: |
| snd_soc_dpcm_mutex_unlock(card); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); |
| |
| static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); |
| struct snd_soc_dpcm *dpcm; |
| int stream = fe_substream->stream; |
| |
| snd_soc_dpcm_mutex_assert_held(fe); |
| |
| /* mark FE's links ready to prune */ |
| for_each_dpcm_be(fe, stream, dpcm) |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| |
| dpcm_be_disconnect(fe, stream); |
| } |
| |
| static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); |
| int ret; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| ret = dpcm_fe_dai_shutdown(fe_substream); |
| |
| dpcm_fe_dai_cleanup(fe_substream); |
| |
| snd_soc_dpcm_mutex_unlock(fe); |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); |
| struct snd_soc_dapm_widget_list *list; |
| int ret; |
| int stream = fe_substream->stream; |
| |
| snd_soc_dpcm_mutex_lock(fe); |
| |
| ret = dpcm_path_get(fe, stream, &list); |
| if (ret < 0) |
| goto open_end; |
| |
| /* calculate valid and active FE <-> BE dpcms */ |
| dpcm_process_paths(fe, stream, &list, 1); |
| |
| ret = dpcm_fe_dai_startup(fe_substream); |
| if (ret < 0) |
| dpcm_fe_dai_cleanup(fe_substream); |
| |
| dpcm_clear_pending_state(fe, stream); |
| dpcm_path_put(&list); |
| open_end: |
| snd_soc_dpcm_mutex_unlock(fe); |
| return ret; |
| } |
| |
| static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, |
| int *playback, int *capture) |
| { |
| struct snd_soc_dai_link *dai_link = rtd->dai_link; |
| struct snd_soc_dai *cpu_dai; |
| int has_playback = 0; |
| int has_capture = 0; |
| int i; |
| |
| if (dai_link->dynamic && dai_link->num_cpus > 1) { |
| dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n"); |
| return -EINVAL; |
| } |
| |
| if (dai_link->dynamic || dai_link->no_pcm) { |
| int stream; |
| |
| if (dai_link->dpcm_playback) { |
| stream = SNDRV_PCM_STREAM_PLAYBACK; |
| |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) { |
| if (snd_soc_dai_stream_valid(cpu_dai, stream)) { |
| has_playback = 1; |
| break; |
| } |
| } |
| if (!has_playback) { |
| dev_err(rtd->card->dev, |
| "No CPU DAIs support playback for stream %s\n", |
| dai_link->stream_name); |
| return -EINVAL; |
| } |
| } |
| if (dai_link->dpcm_capture) { |
| stream = SNDRV_PCM_STREAM_CAPTURE; |
| |
| for_each_rtd_cpu_dais(rtd, i, cpu_dai) { |
| if (snd_soc_dai_stream_valid(cpu_dai, stream)) { |
| has_capture = 1; |
| break; |
| } |
| } |
| |
| if (!has_capture) { |
| dev_err(rtd->card->dev, |
| "No CPU DAIs support capture for stream %s\n", |
| dai_link->stream_name); |
| return -EINVAL; |
| } |
| } |
| } else { |
| struct snd_soc_dai_link_ch_map *ch_maps; |
| struct snd_soc_dai *codec_dai; |
| |
| /* Adapt stream for codec2codec links */ |
| int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); |
| int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); |
| |
| /* |
| * see |
| * soc.h :: [dai_link->ch_maps Image sample] |
| */ |
| for_each_rtd_ch_maps(rtd, i, ch_maps) { |
| cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); |
| codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec); |
| |
| if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && |
| snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) |
| has_playback = 1; |
| if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && |
| snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) |
| has_capture = 1; |
| } |
| } |
| |
| if (dai_link->playback_only) |
| has_capture = 0; |
| |
| if (dai_link->capture_only) |
| has_playback = 0; |
| |
| if (!has_playback && !has_capture) { |
| dev_err(rtd->dev, "substream %s has no playback, no capture\n", |
| dai_link->stream_name); |
| |
| return -EINVAL; |
| } |
| |
| *playback = has_playback; |
| *capture = has_capture; |
| |
| return 0; |
| } |
| |
| static int soc_create_pcm(struct snd_pcm **pcm, |
| struct snd_soc_pcm_runtime *rtd, |
| int playback, int capture, int num) |
| { |
| char new_name[64]; |
| int ret; |
| |
| /* create the PCM */ |
| if (rtd->dai_link->c2c_params) { |
| snprintf(new_name, sizeof(new_name), "codec2codec(%s)", |
| rtd->dai_link->stream_name); |
| |
| ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, |
| playback, capture, pcm); |
| } else if (rtd->dai_link->no_pcm) { |
| snprintf(new_name, sizeof(new_name), "(%s)", |
| rtd->dai_link->stream_name); |
| |
| ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, |
| playback, capture, pcm); |
| } else { |
| if (rtd->dai_link->dynamic) |
| snprintf(new_name, sizeof(new_name), "%s (*)", |
| rtd->dai_link->stream_name); |
| else |
| snprintf(new_name, sizeof(new_name), "%s %s-%d", |
| rtd->dai_link->stream_name, |
| soc_codec_dai_name(rtd), num); |
| |
| ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, |
| capture, pcm); |
| } |
| if (ret < 0) { |
| dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", |
| new_name, rtd->dai_link->name, ret); |
| return ret; |
| } |
| dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); |
| |
| return 0; |
| } |
| |
| /* create a new pcm */ |
| int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) |
| { |
| struct snd_soc_component *component; |
| struct snd_pcm *pcm; |
| int ret = 0, playback = 0, capture = 0; |
| int i; |
| |
| ret = soc_get_playback_capture(rtd, &playback, &capture); |
| if (ret < 0) |
| return ret; |
| |
| ret = soc_create_pcm(&pcm, rtd, playback, capture, num); |
| if (ret < 0) |
| return ret; |
| |
| /* DAPM dai link stream work */ |
| /* |
| * Currently nothing to do for c2c links |
| * Since c2c links are internal nodes in the DAPM graph and |
| * don't interface with the outside world or application layer |
| * we don't have to do any special handling on close. |
| */ |
| if (!rtd->dai_link->c2c_params) |
| rtd->close_delayed_work_func = snd_soc_close_delayed_work; |
| |
| rtd->pcm = pcm; |
| pcm->nonatomic = rtd->dai_link->nonatomic; |
| pcm->private_data = rtd; |
| pcm->no_device_suspend = true; |
| |
| if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { |
| if (playback) |
| pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; |
| if (capture) |
| pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; |
| goto out; |
| } |
| |
| /* ASoC PCM operations */ |
| if (rtd->dai_link->dynamic) { |
| rtd->ops.open = dpcm_fe_dai_open; |
| rtd->ops.hw_params = dpcm_fe_dai_hw_params; |
| rtd->ops.prepare = dpcm_fe_dai_prepare; |
| rtd->ops.trigger = dpcm_fe_dai_trigger; |
| rtd->ops.hw_free = dpcm_fe_dai_hw_free; |
| rtd->ops.close = dpcm_fe_dai_close; |
| rtd->ops.pointer = soc_pcm_pointer; |
| } else { |
| rtd->ops.open = soc_pcm_open; |
| rtd->ops.hw_params = soc_pcm_hw_params; |
| rtd->ops.prepare = soc_pcm_prepare; |
| rtd->ops.trigger = soc_pcm_trigger; |
| rtd->ops.hw_free = soc_pcm_hw_free; |
| rtd->ops.close = soc_pcm_close; |
| rtd->ops.pointer = soc_pcm_pointer; |
| } |
| |
| for_each_rtd_components(rtd, i, component) { |
| const struct snd_soc_component_driver *drv = component->driver; |
| |
| if (drv->ioctl) |
| rtd->ops.ioctl = snd_soc_pcm_component_ioctl; |
| if (drv->sync_stop) |
| rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; |
| if (drv->copy) |
| rtd->ops.copy = snd_soc_pcm_component_copy; |
| if (drv->page) |
| rtd->ops.page = snd_soc_pcm_component_page; |
| if (drv->mmap) |
| rtd->ops.mmap = snd_soc_pcm_component_mmap; |
| if (drv->ack) |
| rtd->ops.ack = snd_soc_pcm_component_ack; |
| } |
| |
| if (playback) |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); |
| |
| if (capture) |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); |
| |
| ret = snd_soc_pcm_component_new(rtd); |
| if (ret < 0) |
| return ret; |
| out: |
| dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", |
| soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); |
| return ret; |
| } |
| |
| /* is the current PCM operation for this FE ? */ |
| int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) |
| return 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); |
| |
| /* is the current PCM operation for this BE ? */ |
| int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || |
| ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && |
| be->dpcm[stream].runtime_update)) |
| return 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); |
| |
| /* get the substream for this BE */ |
| struct snd_pcm_substream * |
| snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) |
| { |
| return be->pcm->streams[stream].substream; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); |
| |
| static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, |
| int stream, |
| const enum snd_soc_dpcm_state *states, |
| int num_states) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int state; |
| int ret = 1; |
| int i; |
| |
| for_each_dpcm_fe(be, stream, dpcm) { |
| |
| if (dpcm->fe == fe) |
| continue; |
| |
| state = dpcm->fe->dpcm[stream].state; |
| for (i = 0; i < num_states; i++) { |
| if (state == states[i]) { |
| ret = 0; |
| break; |
| } |
| } |
| } |
| |
| /* it's safe to do this BE DAI */ |
| return ret; |
| } |
| |
| /* |
| * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE |
| * are not running, paused or suspended for the specified stream direction. |
| */ |
| int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| const enum snd_soc_dpcm_state state[] = { |
| |