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e123036be3
In the BE hw_params configuration, the existing code checks if any of the existing FEs are prepared, running, paused or suspended - and skips the configuration in those cases. This allows multiple calls of hw_params which the ALSA state machine supports. This check is not handled for the prepare stage, which can lead to the same BE being prepared multiple times. This patch adds a check similar to that of the hw_params, with the main difference being that the suspended state is allowed: the ALSA state machine allows a transition from suspended to prepared with hw_params skipped. This problem was detected on Intel IPC4/SoundWire devices, where the BE dailink .prepare stage is used to configure the SoundWire stream with a bank switch. Multiple .prepare calls lead to conflicts with the .trigger operation with IPC4 configurations. This problem was not detected earlier on Intel devices, HDaudio BE dailinks detect that the link is already prepared and skip the configuration, and for IPC3 devices there is no BE trigger. Link: https://github.com/thesofproject/sof/issues/7596 Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com Link: https://lore.kernel.org/r/20230517185731.487124-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org
176 lines
5.6 KiB
C
176 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support
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*
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* Author: Liam Girdwood <lrg@ti.com>
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*/
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#ifndef __LINUX_SND_SOC_DPCM_H
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#define __LINUX_SND_SOC_DPCM_H
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <sound/pcm.h>
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struct snd_soc_pcm_runtime;
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/*
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* Types of runtime_update to perform. e.g. originated from FE PCM ops
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* or audio route changes triggered by muxes/mixers.
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*/
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enum snd_soc_dpcm_update {
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SND_SOC_DPCM_UPDATE_NO = 0,
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SND_SOC_DPCM_UPDATE_BE,
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SND_SOC_DPCM_UPDATE_FE,
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};
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/*
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* Dynamic PCM Frontend -> Backend link management states.
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*/
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enum snd_soc_dpcm_link_state {
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SND_SOC_DPCM_LINK_STATE_NEW = 0, /* newly created link */
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SND_SOC_DPCM_LINK_STATE_FREE, /* link to be dismantled */
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};
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/*
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* Dynamic PCM Frontend -> Backend link PCM states.
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*/
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enum snd_soc_dpcm_state {
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SND_SOC_DPCM_STATE_NEW = 0,
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SND_SOC_DPCM_STATE_OPEN,
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SND_SOC_DPCM_STATE_HW_PARAMS,
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SND_SOC_DPCM_STATE_PREPARE,
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SND_SOC_DPCM_STATE_START,
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SND_SOC_DPCM_STATE_STOP,
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SND_SOC_DPCM_STATE_PAUSED,
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SND_SOC_DPCM_STATE_SUSPEND,
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SND_SOC_DPCM_STATE_HW_FREE,
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SND_SOC_DPCM_STATE_CLOSE,
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};
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/*
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* Dynamic PCM trigger ordering. Triggering flexibility is required as some
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* DSPs require triggering before/after their CPU platform and DAIs.
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*
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* i.e. some clients may want to manually order this call in their PCM
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* trigger() whilst others will just use the regular core ordering.
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*/
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enum snd_soc_dpcm_trigger {
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SND_SOC_DPCM_TRIGGER_PRE = 0,
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SND_SOC_DPCM_TRIGGER_POST,
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SND_SOC_DPCM_TRIGGER_BESPOKE,
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};
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/*
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* Dynamic PCM link
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* This links together a FE and BE DAI at runtime and stores the link
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* state information and the hw_params configuration.
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*/
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struct snd_soc_dpcm {
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/* FE and BE DAIs*/
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struct snd_soc_pcm_runtime *be;
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struct snd_soc_pcm_runtime *fe;
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/* link state */
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enum snd_soc_dpcm_link_state state;
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/* list of BE and FE for this DPCM link */
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struct list_head list_be;
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struct list_head list_fe;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_state;
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#endif
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};
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/*
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* Dynamic PCM runtime data.
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*/
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struct snd_soc_dpcm_runtime {
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struct list_head be_clients;
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struct list_head fe_clients;
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int users;
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struct snd_pcm_hw_params hw_params;
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/* state and update */
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enum snd_soc_dpcm_update runtime_update;
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enum snd_soc_dpcm_state state;
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int trigger_pending; /* trigger cmd + 1 if pending, 0 if not */
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int be_start; /* refcount protected by BE stream pcm lock */
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int be_pause; /* refcount protected by BE stream pcm lock */
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bool fe_pause; /* used to track STOP after PAUSE */
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};
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#define for_each_dpcm_fe(be, stream, _dpcm) \
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list_for_each_entry(_dpcm, &(be)->dpcm[stream].fe_clients, list_fe)
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#define for_each_dpcm_be(fe, stream, _dpcm) \
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list_for_each_entry(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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#define for_each_dpcm_be_safe(fe, stream, _dpcm, __dpcm) \
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list_for_each_entry_safe(_dpcm, __dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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#define for_each_dpcm_be_rollback(fe, stream, _dpcm) \
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list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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/* can this BE stop and free */
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int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* can this BE perform a hw_params() */
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int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* can this BE perform prepare */
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int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* is the current PCM operation for this FE ? */
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int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
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/* is the current PCM operation for this BE ? */
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int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* get the substream for this BE */
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struct snd_pcm_substream *
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snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream);
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/* update audio routing between PCMs and any DAI links */
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int snd_soc_dpcm_runtime_update(struct snd_soc_card *card);
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#ifdef CONFIG_DEBUG_FS
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void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
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#else
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static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
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{
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}
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#endif
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int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list_);
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void dpcm_path_put(struct snd_soc_dapm_widget_list **list);
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int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list, int new);
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int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
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int do_hw_free, struct snd_soc_dpcm *last);
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void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream);
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int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
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int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
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int event);
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bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir);
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int widget_in_list(struct snd_soc_dapm_widget_list *list,
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struct snd_soc_dapm_widget *widget);
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#define dpcm_be_dai_startup_rollback(fe, stream, last) \
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dpcm_be_dai_stop(fe, stream, 0, last)
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#define dpcm_be_dai_startup_unwind(fe, stream) dpcm_be_dai_stop(fe, stream, 0, NULL)
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#define dpcm_be_dai_shutdown(fe, stream) dpcm_be_dai_stop(fe, stream, 1, NULL)
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#endif
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