diff options
Diffstat (limited to 'sound/soc/sof/pcm.c')
| -rw-r--r-- | sound/soc/sof/pcm.c | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c new file mode 100644 index 000000000..be6f38af3 --- /dev/null +++ b/sound/soc/sof/pcm.c @@ -0,0 +1,693 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) +// +// This file is provided under a dual BSD/GPLv2 license. When using or +// redistributing this file, you may do so under either license. +// +// Copyright(c) 2018 Intel Corporation. All rights reserved. +// +// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> +// +// PCM Layer, interface between ALSA and IPC. +// + +#include <linux/pm_runtime.h> +#include <sound/pcm_params.h> +#include <sound/sof.h> +#include <trace/events/sof.h> +#include "sof-of-dev.h" +#include "sof-priv.h" +#include "sof-audio.h" +#include "sof-utils.h" +#include "ops.h" + +/* Create DMA buffer page table for DSP */ +static int create_page_table(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + unsigned char *dma_area, size_t size) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_pcm *spcm; + struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream); + int stream = substream->stream; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + return snd_sof_create_page_table(component->dev, dmab, + spcm->stream[stream].page_table.area, size); +} + +/* + * sof pcm period elapse work + */ +static void snd_sof_pcm_period_elapsed_work(struct work_struct *work) +{ + struct snd_sof_pcm_stream *sps = + container_of(work, struct snd_sof_pcm_stream, + period_elapsed_work); + + snd_pcm_period_elapsed(sps->substream); +} + +void snd_sof_pcm_init_elapsed_work(struct work_struct *work) +{ + INIT_WORK(work, snd_sof_pcm_period_elapsed_work); +} + +/* + * sof pcm period elapse, this could be called at irq thread context. + */ +void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); + struct snd_sof_pcm *spcm; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) { + dev_err(component->dev, + "error: period elapsed for unknown stream!\n"); + return; + } + + /* + * snd_pcm_period_elapsed() can be called in interrupt context + * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), + * when the PCM is done draining or xrun happened, a STOP IPC will + * then be sent and this IPC will hit IPC timeout. + * To avoid sending IPC before the previous IPC is handled, we + * schedule delayed work here to call the snd_pcm_period_elapsed(). + */ + schedule_work(&spcm->stream[substream->stream].period_elapsed_work); +} +EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); + +static int +sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd, + struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params, + struct snd_sof_platform_stream_params *platform_params, int dir) +{ + struct snd_soc_dai *dai; + int ret, j; + + /* query DAPM for list of connected widgets and set them up */ + for_each_rtd_cpu_dais(rtd, j, dai) { + struct snd_soc_dapm_widget_list *list; + + ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list, + dpcm_end_walk_at_be); + if (ret < 0) { + dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name, + dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); + return ret; + } + + spcm->stream[dir].list = list; + + ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir); + if (ret < 0) { + dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n", + spcm->pcm.pcm_id, dir); + spcm->stream[dir].list = NULL; + snd_soc_dapm_dai_free_widgets(&list); + return ret; + } + } + + return 0; +} + +static int sof_pcm_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_platform_stream_params platform_params = { 0 }; + const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_sof_pcm *spcm; + int ret; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + /* + * Handle repeated calls to hw_params() without free_pcm() in + * between. At least ALSA OSS emulation depends on this. + */ + if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { + ret = pcm_ops->hw_free(component, substream); + if (ret < 0) + return ret; + + spcm->prepared[substream->stream] = false; + } + + dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n", + spcm->pcm.pcm_id, substream->stream); + + ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params); + if (ret < 0) { + dev_err(component->dev, "platform hw params failed\n"); + return ret; + } + + /* if this is a repeated hw_params without hw_free, skip setting up widgets */ + if (!spcm->stream[substream->stream].list) { + ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params, + substream->stream); + if (ret < 0) + return ret; + } + + /* create compressed page table for audio firmware */ + if (runtime->buffer_changed) { + ret = create_page_table(component, substream, runtime->dma_area, + runtime->dma_bytes); + + if (ret < 0) + return ret; + } + + if (pcm_ops->hw_params) { + ret = pcm_ops->hw_params(component, substream, params, &platform_params); + if (ret < 0) + return ret; + } + + spcm->prepared[substream->stream] = true; + + /* save pcm hw_params */ + memcpy(&spcm->params[substream->stream], params, sizeof(*params)); + + return 0; +} + +static int sof_pcm_hw_free(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; + struct snd_sof_pcm *spcm; + int ret, err = 0; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + dev_dbg(component->dev, "pcm: free stream %d dir %d\n", + spcm->pcm.pcm_id, substream->stream); + + /* free PCM in the DSP */ + if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { + ret = pcm_ops->hw_free(component, substream); + if (ret < 0) + err = ret; + + spcm->prepared[substream->stream] = false; + } + + /* stop DMA */ + ret = snd_sof_pcm_platform_hw_free(sdev, substream); + if (ret < 0) { + dev_err(component->dev, "error: platform hw free failed\n"); + err = ret; + } + + /* free the DAPM widget list */ + ret = sof_widget_list_free(sdev, spcm, substream->stream); + if (ret < 0) + err = ret; + + cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); + + return err; +} + +static int sof_pcm_prepare(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_pcm *spcm; + int ret; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + if (spcm->prepared[substream->stream]) + return 0; + + dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n", + spcm->pcm.pcm_id, substream->stream); + + /* set hw_params */ + ret = sof_pcm_hw_params(component, + substream, &spcm->params[substream->stream]); + if (ret < 0) { + dev_err(component->dev, + "error: set pcm hw_params after resume\n"); + return ret; + } + + return 0; +} + +/* + * FE dai link trigger actions are always executed in non-atomic context because + * they involve IPC's. + */ +static int sof_pcm_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; + struct snd_sof_pcm *spcm; + bool reset_hw_params = false; + bool free_widget_list = false; + bool ipc_first = false; + int ret = 0; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n", + spcm->pcm.pcm_id, substream->stream, cmd); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + ipc_first = true; + break; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + break; + case SNDRV_PCM_TRIGGER_START: + if (spcm->stream[substream->stream].suspend_ignored) { + /* + * This case will be triggered when INFO_RESUME is + * not supported, no need to re-start streams that + * remained enabled in D0ix. + */ + spcm->stream[substream->stream].suspend_ignored = false; + return 0; + } + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + if (sdev->system_suspend_target == SOF_SUSPEND_S0IX && + spcm->stream[substream->stream].d0i3_compatible) { + /* + * trap the event, not sending trigger stop to + * prevent the FW pipelines from being stopped, + * and mark the flag to ignore the upcoming DAPM + * PM events. + */ + spcm->stream[substream->stream].suspend_ignored = true; + return 0; + } + free_widget_list = true; + fallthrough; + case SNDRV_PCM_TRIGGER_STOP: + ipc_first = true; + reset_hw_params = true; + break; + default: + dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd); + return -EINVAL; + } + + /* + * DMA and IPC sequence is different for start and stop. Need to send + * STOP IPC before stop DMA + */ + if (!ipc_first) + snd_sof_pcm_platform_trigger(sdev, substream, cmd); + + if (pcm_ops->trigger) + ret = pcm_ops->trigger(component, substream, cmd); + + /* need to STOP DMA even if trigger IPC failed */ + if (ipc_first) + snd_sof_pcm_platform_trigger(sdev, substream, cmd); + + /* free PCM if reset_hw_params is set and the STOP IPC is successful */ + if (!ret && reset_hw_params) + ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, + free_widget_list); + + return ret; +} + +static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_sof_pcm *spcm; + snd_pcm_uframes_t host, dai; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + /* use dsp ops pointer callback directly if set */ + if (sof_ops(sdev)->pcm_pointer) + return sof_ops(sdev)->pcm_pointer(sdev, substream); + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + /* read position from DSP */ + host = bytes_to_frames(substream->runtime, + spcm->stream[substream->stream].posn.host_posn); + dai = bytes_to_frames(substream->runtime, + spcm->stream[substream->stream].posn.dai_posn); + + trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai); + + return host; +} + +static int sof_pcm_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_sof_dsp_ops *ops = sof_ops(sdev); + struct snd_sof_pcm *spcm; + struct snd_soc_tplg_stream_caps *caps; + int ret; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + dev_dbg(component->dev, "pcm: open stream %d dir %d\n", + spcm->pcm.pcm_id, substream->stream); + + + caps = &spcm->pcm.caps[substream->stream]; + + /* set runtime config */ + runtime->hw.info = ops->hw_info; /* platform-specific */ + + /* set any runtime constraints based on topology */ + runtime->hw.formats = le64_to_cpu(caps->formats); + runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); + runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); + runtime->hw.periods_min = le32_to_cpu(caps->periods_min); + runtime->hw.periods_max = le32_to_cpu(caps->periods_max); + + /* + * caps->buffer_size_min is not used since the + * snd_pcm_hardware structure only defines buffer_bytes_max + */ + runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); + + dev_dbg(component->dev, "period min %zd max %zd bytes\n", + runtime->hw.period_bytes_min, + runtime->hw.period_bytes_max); + dev_dbg(component->dev, "period count %d max %d\n", + runtime->hw.periods_min, + runtime->hw.periods_max); + dev_dbg(component->dev, "buffer max %zd bytes\n", + runtime->hw.buffer_bytes_max); + + /* set wait time - TODO: come from topology */ + substream->wait_time = 500; + + spcm->stream[substream->stream].posn.host_posn = 0; + spcm->stream[substream->stream].posn.dai_posn = 0; + spcm->stream[substream->stream].substream = substream; + spcm->prepared[substream->stream] = false; + + ret = snd_sof_pcm_platform_open(sdev, substream); + if (ret < 0) + dev_err(component->dev, "error: pcm open failed %d\n", ret); + + return ret; +} + +static int sof_pcm_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_sof_pcm *spcm; + int err; + + /* nothing to do for BE */ + if (rtd->dai_link->no_pcm) + return 0; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + dev_dbg(component->dev, "pcm: close stream %d dir %d\n", + spcm->pcm.pcm_id, substream->stream); + + err = snd_sof_pcm_platform_close(sdev, substream); + if (err < 0) { + dev_err(component->dev, "error: pcm close failed %d\n", + err); + /* + * keep going, no point in preventing the close + * from happening + */ + } + + return 0; +} + +/* + * Pre-allocate playback/capture audio buffer pages. + * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free + * snd_pcm_lib_preallocate_free_for_all() is called by the core. + */ +static int sof_pcm_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_sof_pcm *spcm; + struct snd_pcm *pcm = rtd->pcm; + struct snd_soc_tplg_stream_caps *caps; + int stream = SNDRV_PCM_STREAM_PLAYBACK; + + /* find SOF PCM for this RTD */ + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) { + dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n", + rtd->dai_link->id); + return 0; + } + + dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); + + /* do we need to pre-allocate playback audio buffer pages */ + if (!spcm->pcm.playback) + goto capture; + + caps = &spcm->pcm.caps[stream]; + + /* pre-allocate playback audio buffer pages */ + dev_dbg(component->dev, + "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", + caps->name, caps->buffer_size_min, caps->buffer_size_max); + + if (!pcm->streams[stream].substream) { + dev_err(component->dev, "error: NULL playback substream!\n"); + return -EINVAL; + } + + snd_pcm_set_managed_buffer(pcm->streams[stream].substream, + SNDRV_DMA_TYPE_DEV_SG, sdev->dev, + 0, le32_to_cpu(caps->buffer_size_max)); +capture: + stream = SNDRV_PCM_STREAM_CAPTURE; + + /* do we need to pre-allocate capture audio buffer pages */ + if (!spcm->pcm.capture) + return 0; + + caps = &spcm->pcm.caps[stream]; + + /* pre-allocate capture audio buffer pages */ + dev_dbg(component->dev, + "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", + caps->name, caps->buffer_size_min, caps->buffer_size_max); + + if (!pcm->streams[stream].substream) { + dev_err(component->dev, "error: NULL capture substream!\n"); + return -EINVAL; + } + + snd_pcm_set_managed_buffer(pcm->streams[stream].substream, + SNDRV_DMA_TYPE_DEV_SG, sdev->dev, + 0, le32_to_cpu(caps->buffer_size_max)); + + return 0; +} + +/* fixup the BE DAI link to match any values from topology */ +int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) +{ + struct snd_interval *rate = hw_param_interval(params, + SNDRV_PCM_HW_PARAM_RATE); + struct snd_interval *channels = hw_param_interval(params, + SNDRV_PCM_HW_PARAM_CHANNELS); + struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); + struct snd_sof_dai *dai = + snd_sof_find_dai(component, (char *)rtd->dai_link->name); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; + + /* no topology exists for this BE, try a common configuration */ + if (!dai) { + dev_warn(component->dev, + "warning: no topology found for BE DAI %s config\n", + rtd->dai_link->name); + + /* set 48k, stereo, 16bits by default */ + rate->min = 48000; + rate->max = 48000; + + channels->min = 2; + channels->max = 2; + + snd_mask_none(fmt); + snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); + + return 0; + } + + if (pcm_ops->dai_link_fixup) + return pcm_ops->dai_link_fixup(rtd, params); + + return 0; +} +EXPORT_SYMBOL(sof_pcm_dai_link_fixup); + +static int sof_pcm_probe(struct snd_soc_component *component) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_sof_pdata *plat_data = sdev->pdata; + const char *tplg_filename; + int ret; + + /* + * make sure the device is pm_runtime_active before loading the + * topology and initiating IPC or bus transactions + */ + ret = pm_runtime_resume_and_get(component->dev); + if (ret < 0 && ret != -EACCES) + return ret; + + /* load the default topology */ + sdev->component = component; + + tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, + "%s/%s", + plat_data->tplg_filename_prefix, + plat_data->tplg_filename); + if (!tplg_filename) { + ret = -ENOMEM; + goto pm_error; + } + + ret = snd_sof_load_topology(component, tplg_filename); + if (ret < 0) + dev_err(component->dev, "error: failed to load DSP topology %d\n", + ret); + +pm_error: + pm_runtime_mark_last_busy(component->dev); + pm_runtime_put_autosuspend(component->dev); + + return ret; +} + +static void sof_pcm_remove(struct snd_soc_component *component) +{ + /* remove topology */ + snd_soc_tplg_component_remove(component); +} + +static int sof_pcm_ack(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + + return snd_sof_pcm_platform_ack(sdev, substream); +} + +void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) +{ + struct snd_soc_component_driver *pd = &sdev->plat_drv; + struct snd_sof_pdata *plat_data = sdev->pdata; + const char *drv_name; + + if (plat_data->machine) + drv_name = plat_data->machine->drv_name; + else if (plat_data->of_machine) + drv_name = plat_data->of_machine->drv_name; + else + drv_name = NULL; + + pd->name = "sof-audio-component"; + pd->probe = sof_pcm_probe; + pd->remove = sof_pcm_remove; + pd->open = sof_pcm_open; + pd->close = sof_pcm_close; + pd->hw_params = sof_pcm_hw_params; + pd->prepare = sof_pcm_prepare; + pd->hw_free = sof_pcm_hw_free; + pd->trigger = sof_pcm_trigger; + pd->pointer = sof_pcm_pointer; + pd->ack = sof_pcm_ack; + +#if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) + pd->compress_ops = &sof_compressed_ops; +#endif + + pd->pcm_construct = sof_pcm_new; + pd->ignore_machine = drv_name; + pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; + pd->be_pcm_base = SOF_BE_PCM_BASE; + pd->use_dai_pcm_id = true; + pd->topology_name_prefix = "sof"; + + /* increment module refcount when a pcm is opened */ + pd->module_get_upon_open = 1; + + pd->legacy_dai_naming = 1; +} |