// 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 // // PCM Layer, interface between ALSA and IPC. // #include #include #include #include #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); const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm); struct snd_sof_platform_stream_params platform_params = { 0 }; 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 && 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 && 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 = sof_ipc_get_ops(sdev, 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 && 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 = sof_ipc_get_ops(sdev, pcm); struct snd_sof_pcm *spcm; bool reset_hw_params = 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; } 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 && 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, false); 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 = sof_ipc_get_ops(sdev, 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 && 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); } static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component, struct snd_pcm_substream *substream) { struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm); if (pcm_ops && pcm_ops->delay) return pcm_ops->delay(component, substream); return 0; } 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; pd->delay = sof_pcm_delay; #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; }