diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/sof/ipc4-pcm.c | 845 |
1 files changed, 845 insertions, 0 deletions
diff --git a/sound/soc/sof/ipc4-pcm.c b/sound/soc/sof/ipc4-pcm.c new file mode 100644 index 0000000000..db19cd03ec --- /dev/null +++ b/sound/soc/sof/ipc4-pcm.c @@ -0,0 +1,845 @@ +// 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) 2022 Intel Corporation. All rights reserved. +// + +#include <sound/pcm_params.h> +#include <sound/sof/ipc4/header.h> +#include "sof-audio.h" +#include "sof-priv.h" +#include "ops.h" +#include "ipc4-priv.h" +#include "ipc4-topology.h" +#include "ipc4-fw-reg.h" + +static int sof_ipc4_set_multi_pipeline_state(struct snd_sof_dev *sdev, u32 state, + struct ipc4_pipeline_set_state_data *trigger_list) +{ + struct sof_ipc4_msg msg = {{ 0 }}; + u32 primary, ipc_size; + + /* trigger a single pipeline */ + if (trigger_list->count == 1) + return sof_ipc4_set_pipeline_state(sdev, trigger_list->pipeline_instance_ids[0], + state); + + primary = state; + primary |= SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_GLB_SET_PIPELINE_STATE); + primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST); + primary |= SOF_IPC4_MSG_TARGET(SOF_IPC4_FW_GEN_MSG); + msg.primary = primary; + + /* trigger multiple pipelines with a single IPC */ + msg.extension = SOF_IPC4_GLB_PIPE_STATE_EXT_MULTI; + + /* ipc_size includes the count and the pipeline IDs for the number of pipelines */ + ipc_size = sizeof(u32) * (trigger_list->count + 1); + msg.data_size = ipc_size; + msg.data_ptr = trigger_list; + + return sof_ipc_tx_message_no_reply(sdev->ipc, &msg, ipc_size); +} + +int sof_ipc4_set_pipeline_state(struct snd_sof_dev *sdev, u32 instance_id, u32 state) +{ + struct sof_ipc4_msg msg = {{ 0 }}; + u32 primary; + + dev_dbg(sdev->dev, "ipc4 set pipeline instance %d state %d", instance_id, state); + + primary = state; + primary |= SOF_IPC4_GLB_PIPE_STATE_ID(instance_id); + primary |= SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_GLB_SET_PIPELINE_STATE); + primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST); + primary |= SOF_IPC4_MSG_TARGET(SOF_IPC4_FW_GEN_MSG); + + msg.primary = primary; + + return sof_ipc_tx_message_no_reply(sdev->ipc, &msg, 0); +} +EXPORT_SYMBOL(sof_ipc4_set_pipeline_state); + +static void +sof_ipc4_add_pipeline_to_trigger_list(struct snd_sof_dev *sdev, int state, + struct snd_sof_pipeline *spipe, + struct ipc4_pipeline_set_state_data *trigger_list) +{ + struct snd_sof_widget *pipe_widget = spipe->pipe_widget; + struct sof_ipc4_pipeline *pipeline = pipe_widget->private; + + if (pipeline->skip_during_fe_trigger && state != SOF_IPC4_PIPE_RESET) + return; + + switch (state) { + case SOF_IPC4_PIPE_RUNNING: + /* + * Trigger pipeline if all PCMs containing it are paused or if it is RUNNING + * for the first time + */ + if (spipe->started_count == spipe->paused_count) + trigger_list->pipeline_instance_ids[trigger_list->count++] = + pipe_widget->instance_id; + break; + case SOF_IPC4_PIPE_RESET: + /* RESET if the pipeline is neither running nor paused */ + if (!spipe->started_count && !spipe->paused_count) + trigger_list->pipeline_instance_ids[trigger_list->count++] = + pipe_widget->instance_id; + break; + case SOF_IPC4_PIPE_PAUSED: + /* Pause the pipeline only when its started_count is 1 more than paused_count */ + if (spipe->paused_count == (spipe->started_count - 1)) + trigger_list->pipeline_instance_ids[trigger_list->count++] = + pipe_widget->instance_id; + break; + default: + break; + } +} + +static void +sof_ipc4_update_pipeline_state(struct snd_sof_dev *sdev, int state, int cmd, + struct snd_sof_pipeline *spipe, + struct ipc4_pipeline_set_state_data *trigger_list) +{ + struct snd_sof_widget *pipe_widget = spipe->pipe_widget; + struct sof_ipc4_pipeline *pipeline = pipe_widget->private; + int i; + + if (pipeline->skip_during_fe_trigger && state != SOF_IPC4_PIPE_RESET) + return; + + /* set state for pipeline if it was just triggered */ + for (i = 0; i < trigger_list->count; i++) { + if (trigger_list->pipeline_instance_ids[i] == pipe_widget->instance_id) { + pipeline->state = state; + break; + } + } + + switch (state) { + case SOF_IPC4_PIPE_PAUSED: + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + /* + * increment paused_count if the PAUSED is the final state during + * the PAUSE trigger + */ + spipe->paused_count++; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + /* + * decrement started_count if PAUSED is the final state during the + * STOP trigger + */ + spipe->started_count--; + break; + default: + break; + } + break; + case SOF_IPC4_PIPE_RUNNING: + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + /* decrement paused_count for RELEASE */ + spipe->paused_count--; + break; + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + /* increment started_count for START/RESUME */ + spipe->started_count++; + break; + default: + break; + } + break; + default: + break; + } +} + +/* + * The picture below represents the pipeline state machine wrt PCM actions corresponding to the + * triggers and ioctls + * +---------------+ + * | | + * | INIT | + * | | + * +-------+-------+ + * | + * | + * | START + * | + * | + * +----------------+ +------v-------+ +-------------+ + * | | START | | HW_FREE | | + * | RUNNING <-------------+ PAUSED +--------------> + RESET | + * | | PAUSE | | | | + * +------+---------+ RELEASE +---------+----+ +-------------+ + * | ^ + * | | + * | | + * | | + * | PAUSE | + * +---------------------------------+ + * STOP/SUSPEND + * + * Note that during system suspend, the suspend trigger is followed by a hw_free in + * sof_pcm_trigger(). So, the final state during suspend would be RESET. + * Also, since the SOF driver doesn't support full resume, streams would be restarted with the + * prepare ioctl before the START trigger. + */ + +/* + * Chained DMA is a special case where there is no processing on + * DSP. The samples are just moved over by host side DMA to a single + * buffer on DSP and directly from there to link DMA. However, the + * model on SOF driver has two notional pipelines, one at host DAI, + * and another at link DAI. They both shall have the use_chain_dma + * attribute. + */ + +static int sof_ipc4_chain_dma_trigger(struct snd_sof_dev *sdev, + struct snd_sof_pcm_stream_pipeline_list *pipeline_list, + int state, int cmd) +{ + bool allocate, enable, set_fifo_size; + struct sof_ipc4_msg msg = {{ 0 }}; + int i; + + switch (state) { + case SOF_IPC4_PIPE_RUNNING: /* Allocate and start chained dma */ + allocate = true; + enable = true; + /* + * SOF assumes creation of a new stream from the presence of fifo_size + * in the message, so we must leave it out in pause release case. + */ + if (cmd == SNDRV_PCM_TRIGGER_PAUSE_RELEASE) + set_fifo_size = false; + else + set_fifo_size = true; + break; + case SOF_IPC4_PIPE_PAUSED: /* Disable chained DMA. */ + allocate = true; + enable = false; + set_fifo_size = false; + break; + case SOF_IPC4_PIPE_RESET: /* Disable and free chained DMA. */ + allocate = false; + enable = false; + set_fifo_size = false; + break; + default: + dev_err(sdev->dev, "Unexpected state %d", state); + return -EINVAL; + } + + msg.primary = SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_GLB_CHAIN_DMA); + msg.primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST); + msg.primary |= SOF_IPC4_MSG_TARGET(SOF_IPC4_FW_GEN_MSG); + + /* + * To set-up the DMA chain, the host DMA ID and SCS setting + * are retrieved from the host pipeline configuration. Likewise + * the link DMA ID and fifo_size are retrieved from the link + * pipeline configuration. + */ + for (i = 0; i < pipeline_list->count; i++) { + struct snd_sof_pipeline *spipe = pipeline_list->pipelines[i]; + struct snd_sof_widget *pipe_widget = spipe->pipe_widget; + struct sof_ipc4_pipeline *pipeline = pipe_widget->private; + + if (!pipeline->use_chain_dma) { + dev_err(sdev->dev, + "All pipelines in chained DMA stream should have use_chain_dma attribute set."); + return -EINVAL; + } + + msg.primary |= pipeline->msg.primary; + + /* Add fifo_size (actually DMA buffer size) field to the message */ + if (set_fifo_size) + msg.extension |= pipeline->msg.extension; + } + + if (allocate) + msg.primary |= SOF_IPC4_GLB_CHAIN_DMA_ALLOCATE_MASK; + + if (enable) + msg.primary |= SOF_IPC4_GLB_CHAIN_DMA_ENABLE_MASK; + + return sof_ipc_tx_message_no_reply(sdev->ipc, &msg, 0); +} + +static int sof_ipc4_trigger_pipelines(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int state, int cmd) +{ + 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_pcm_stream_pipeline_list *pipeline_list; + struct sof_ipc4_fw_data *ipc4_data = sdev->private; + struct ipc4_pipeline_set_state_data *trigger_list; + struct snd_sof_widget *pipe_widget; + struct sof_ipc4_pipeline *pipeline; + struct snd_sof_pipeline *spipe; + struct snd_sof_pcm *spcm; + int ret; + int i; + + dev_dbg(sdev->dev, "trigger cmd: %d state: %d\n", cmd, state); + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + pipeline_list = &spcm->stream[substream->stream].pipeline_list; + + /* nothing to trigger if the list is empty */ + if (!pipeline_list->pipelines || !pipeline_list->count) + return 0; + + spipe = pipeline_list->pipelines[0]; + pipe_widget = spipe->pipe_widget; + pipeline = pipe_widget->private; + + /* + * If use_chain_dma attribute is set we proceed to chained DMA + * trigger function that handles the rest for the substream. + */ + if (pipeline->use_chain_dma) + return sof_ipc4_chain_dma_trigger(sdev, pipeline_list, state, cmd); + + /* allocate memory for the pipeline data */ + trigger_list = kzalloc(struct_size(trigger_list, pipeline_instance_ids, + pipeline_list->count), GFP_KERNEL); + if (!trigger_list) + return -ENOMEM; + + mutex_lock(&ipc4_data->pipeline_state_mutex); + + /* + * IPC4 requires pipelines to be triggered in order starting at the sink and + * walking all the way to the source. So traverse the pipeline_list in the order + * sink->source when starting PCM's and in the reverse order to pause/stop PCM's. + * Skip the pipelines that have their skip_during_fe_trigger flag set. If there is a fork + * in the pipeline, the order of triggering between the left/right paths will be + * indeterministic. But the sink->source trigger order sink->source would still be + * guaranteed for each fork independently. + */ + if (state == SOF_IPC4_PIPE_RUNNING || state == SOF_IPC4_PIPE_RESET) + for (i = pipeline_list->count - 1; i >= 0; i--) { + spipe = pipeline_list->pipelines[i]; + sof_ipc4_add_pipeline_to_trigger_list(sdev, state, spipe, trigger_list); + } + else + for (i = 0; i < pipeline_list->count; i++) { + spipe = pipeline_list->pipelines[i]; + sof_ipc4_add_pipeline_to_trigger_list(sdev, state, spipe, trigger_list); + } + + /* return if all pipelines are in the requested state already */ + if (!trigger_list->count) { + ret = 0; + goto free; + } + + /* no need to pause before reset or before pause release */ + if (state == SOF_IPC4_PIPE_RESET || cmd == SNDRV_PCM_TRIGGER_PAUSE_RELEASE) + goto skip_pause_transition; + + /* + * set paused state for pipelines if the final state is PAUSED or when the pipeline + * is set to RUNNING for the first time after the PCM is started. + */ + ret = sof_ipc4_set_multi_pipeline_state(sdev, SOF_IPC4_PIPE_PAUSED, trigger_list); + if (ret < 0) { + dev_err(sdev->dev, "failed to pause all pipelines\n"); + goto free; + } + + /* update PAUSED state for all pipelines just triggered */ + for (i = 0; i < pipeline_list->count ; i++) { + spipe = pipeline_list->pipelines[i]; + sof_ipc4_update_pipeline_state(sdev, SOF_IPC4_PIPE_PAUSED, cmd, spipe, + trigger_list); + } + + /* return if this is the final state */ + if (state == SOF_IPC4_PIPE_PAUSED) + goto free; +skip_pause_transition: + /* else set the RUNNING/RESET state in the DSP */ + ret = sof_ipc4_set_multi_pipeline_state(sdev, state, trigger_list); + if (ret < 0) { + dev_err(sdev->dev, "failed to set final state %d for all pipelines\n", state); + goto free; + } + + /* update RUNNING/RESET state for all pipelines that were just triggered */ + for (i = 0; i < pipeline_list->count; i++) { + spipe = pipeline_list->pipelines[i]; + sof_ipc4_update_pipeline_state(sdev, state, cmd, spipe, trigger_list); + } + +free: + mutex_unlock(&ipc4_data->pipeline_state_mutex); + kfree(trigger_list); + return ret; +} + +static int sof_ipc4_pcm_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + int state; + + /* determine the pipeline state */ + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + state = SOF_IPC4_PIPE_PAUSED; + break; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_START: + state = SOF_IPC4_PIPE_RUNNING; + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + state = SOF_IPC4_PIPE_PAUSED; + break; + default: + dev_err(component->dev, "%s: unhandled trigger cmd %d\n", __func__, cmd); + return -EINVAL; + } + + /* set the pipeline state */ + return sof_ipc4_trigger_pipelines(component, substream, state, cmd); +} + +static int sof_ipc4_pcm_hw_free(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + /* command is not relevant with RESET, so just pass 0 */ + return sof_ipc4_trigger_pipelines(component, substream, SOF_IPC4_PIPE_RESET, 0); +} + +static void ipc4_ssp_dai_config_pcm_params_match(struct snd_sof_dev *sdev, const char *link_name, + struct snd_pcm_hw_params *params) +{ + struct snd_sof_dai_link *slink; + struct snd_sof_dai *dai; + bool dai_link_found = false; + int i; + + list_for_each_entry(slink, &sdev->dai_link_list, list) { + if (!strcmp(slink->link->name, link_name)) { + dai_link_found = true; + break; + } + } + + if (!dai_link_found) + return; + + for (i = 0; i < slink->num_hw_configs; i++) { + struct snd_soc_tplg_hw_config *hw_config = &slink->hw_configs[i]; + + if (params_rate(params) == le32_to_cpu(hw_config->fsync_rate)) { + /* set current config for all DAI's with matching name */ + list_for_each_entry(dai, &sdev->dai_list, list) + if (!strcmp(slink->link->name, dai->name)) + dai->current_config = le32_to_cpu(hw_config->id); + break; + } + } +} + +/* + * Fixup DAI link parameters for sampling rate based on + * DAI copier configuration. + */ +static int sof_ipc4_pcm_dai_link_fixup_rate(struct snd_sof_dev *sdev, + struct snd_pcm_hw_params *params, + struct sof_ipc4_copier *ipc4_copier) +{ + struct sof_ipc4_pin_format *pin_fmts = ipc4_copier->available_fmt.input_pin_fmts; + struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + int num_input_formats = ipc4_copier->available_fmt.num_input_formats; + unsigned int fe_rate = params_rate(params); + bool fe_be_rate_match = false; + bool single_be_rate = true; + unsigned int be_rate; + int i; + + /* + * Copier does not change sampling rate, so we + * need to only consider the input pin information. + */ + for (i = 0; i < num_input_formats; i++) { + unsigned int val = pin_fmts[i].audio_fmt.sampling_frequency; + + if (i == 0) + be_rate = val; + else if (val != be_rate) + single_be_rate = false; + + if (val == fe_rate) { + fe_be_rate_match = true; + break; + } + } + + /* + * If rate is different than FE rate, topology must + * contain an SRC. But we do require topology to + * define a single rate in the DAI copier config in + * this case (FE rate may be variable). + */ + if (!fe_be_rate_match) { + if (!single_be_rate) { + dev_err(sdev->dev, "Unable to select sampling rate for DAI link\n"); + return -EINVAL; + } + + rate->min = be_rate; + rate->max = rate->min; + } + + return 0; +} + +static int sof_ipc4_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, + struct snd_pcm_hw_params *params) +{ + 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, rtd->dai_link->name); + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct sof_ipc4_copier *ipc4_copier; + bool use_chain_dma = false; + int dir; + + if (!dai) { + dev_err(component->dev, "%s: No DAI found with name %s\n", __func__, + rtd->dai_link->name); + return -EINVAL; + } + + ipc4_copier = dai->private; + if (!ipc4_copier) { + dev_err(component->dev, "%s: No private data found for DAI %s\n", + __func__, rtd->dai_link->name); + return -EINVAL; + } + + for_each_pcm_streams(dir) { + struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(cpu_dai, dir); + + if (w) { + struct snd_sof_widget *swidget = w->dobj.private; + struct snd_sof_widget *pipe_widget = swidget->spipe->pipe_widget; + struct sof_ipc4_pipeline *pipeline = pipe_widget->private; + + if (pipeline->use_chain_dma) + use_chain_dma = true; + } + } + + /* Chain DMA does not use copiers, so no fixup needed */ + if (!use_chain_dma) { + int ret = sof_ipc4_pcm_dai_link_fixup_rate(sdev, params, ipc4_copier); + + if (ret) + return ret; + } + + switch (ipc4_copier->dai_type) { + case SOF_DAI_INTEL_SSP: + ipc4_ssp_dai_config_pcm_params_match(sdev, (char *)rtd->dai_link->name, params); + break; + default: + break; + } + + return 0; +} + +static void sof_ipc4_pcm_free(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm) +{ + struct snd_sof_pcm_stream_pipeline_list *pipeline_list; + int stream; + + for_each_pcm_streams(stream) { + pipeline_list = &spcm->stream[stream].pipeline_list; + kfree(pipeline_list->pipelines); + pipeline_list->pipelines = NULL; + kfree(spcm->stream[stream].private); + spcm->stream[stream].private = NULL; + } +} + +static int sof_ipc4_pcm_setup(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm) +{ + struct snd_sof_pcm_stream_pipeline_list *pipeline_list; + struct sof_ipc4_fw_data *ipc4_data = sdev->private; + struct sof_ipc4_timestamp_info *stream_info; + bool support_info = true; + u32 abi_version; + u32 abi_offset; + int stream; + + abi_offset = offsetof(struct sof_ipc4_fw_registers, abi_ver); + sof_mailbox_read(sdev, sdev->fw_info_box.offset + abi_offset, &abi_version, + sizeof(abi_version)); + + if (abi_version < SOF_IPC4_FW_REGS_ABI_VER) + support_info = false; + + for_each_pcm_streams(stream) { + pipeline_list = &spcm->stream[stream].pipeline_list; + + /* allocate memory for max number of pipeline IDs */ + pipeline_list->pipelines = kcalloc(ipc4_data->max_num_pipelines, + sizeof(struct snd_sof_widget *), GFP_KERNEL); + if (!pipeline_list->pipelines) { + sof_ipc4_pcm_free(sdev, spcm); + return -ENOMEM; + } + + if (!support_info) + continue; + + stream_info = kzalloc(sizeof(*stream_info), GFP_KERNEL); + if (!stream_info) { + sof_ipc4_pcm_free(sdev, spcm); + return -ENOMEM; + } + + spcm->stream[stream].private = stream_info; + } + + return 0; +} + +static void sof_ipc4_build_time_info(struct snd_sof_dev *sdev, struct snd_sof_pcm_stream *spcm) +{ + struct sof_ipc4_copier *host_copier = NULL; + struct sof_ipc4_copier *dai_copier = NULL; + struct sof_ipc4_llp_reading_slot llp_slot; + struct sof_ipc4_timestamp_info *info; + struct snd_soc_dapm_widget *widget; + struct snd_sof_dai *dai; + int i; + + /* find host & dai to locate info in memory window */ + for_each_dapm_widgets(spcm->list, i, widget) { + struct snd_sof_widget *swidget = widget->dobj.private; + + if (!swidget) + continue; + + if (WIDGET_IS_AIF(swidget->widget->id)) { + host_copier = swidget->private; + } else if (WIDGET_IS_DAI(swidget->widget->id)) { + dai = swidget->private; + dai_copier = dai->private; + } + } + + /* both host and dai copier must be valid for time_info */ + if (!host_copier || !dai_copier) { + dev_err(sdev->dev, "host or dai copier are not found\n"); + return; + } + + info = spcm->private; + info->host_copier = host_copier; + info->dai_copier = dai_copier; + info->llp_offset = offsetof(struct sof_ipc4_fw_registers, llp_gpdma_reading_slots) + + sdev->fw_info_box.offset; + + /* find llp slot used by current dai */ + for (i = 0; i < SOF_IPC4_MAX_LLP_GPDMA_READING_SLOTS; i++) { + sof_mailbox_read(sdev, info->llp_offset, &llp_slot, sizeof(llp_slot)); + if (llp_slot.node_id == dai_copier->data.gtw_cfg.node_id) + break; + + info->llp_offset += sizeof(llp_slot); + } + + if (i < SOF_IPC4_MAX_LLP_GPDMA_READING_SLOTS) + return; + + /* if no llp gpdma slot is used, check aggregated sdw slot */ + info->llp_offset = offsetof(struct sof_ipc4_fw_registers, llp_sndw_reading_slots) + + sdev->fw_info_box.offset; + for (i = 0; i < SOF_IPC4_MAX_LLP_SNDW_READING_SLOTS; i++) { + sof_mailbox_read(sdev, info->llp_offset, &llp_slot, sizeof(llp_slot)); + if (llp_slot.node_id == dai_copier->data.gtw_cfg.node_id) + break; + + info->llp_offset += sizeof(llp_slot); + } + + if (i < SOF_IPC4_MAX_LLP_SNDW_READING_SLOTS) + return; + + /* check EVAD slot */ + info->llp_offset = offsetof(struct sof_ipc4_fw_registers, llp_evad_reading_slot) + + sdev->fw_info_box.offset; + sof_mailbox_read(sdev, info->llp_offset, &llp_slot, sizeof(llp_slot)); + if (llp_slot.node_id != dai_copier->data.gtw_cfg.node_id) { + dev_info(sdev->dev, "no llp found, fall back to default HDA path"); + info->llp_offset = 0; + } +} + +static int sof_ipc4_pcm_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_sof_platform_stream_params *platform_params) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct sof_ipc4_timestamp_info *time_info; + struct snd_sof_pcm *spcm; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return -EINVAL; + + time_info = spcm->stream[substream->stream].private; + /* delay calculation is not supported by current fw_reg ABI */ + if (!time_info) + return 0; + + time_info->stream_start_offset = SOF_IPC4_INVALID_STREAM_POSITION; + time_info->llp_offset = 0; + + sof_ipc4_build_time_info(sdev, &spcm->stream[substream->stream]); + + return 0; +} + +static int sof_ipc4_get_stream_start_offset(struct snd_sof_dev *sdev, + struct snd_pcm_substream *substream, + struct snd_sof_pcm_stream *stream, + struct sof_ipc4_timestamp_info *time_info) +{ + struct sof_ipc4_copier *host_copier = time_info->host_copier; + struct sof_ipc4_copier *dai_copier = time_info->dai_copier; + struct sof_ipc4_pipeline_registers ppl_reg; + u64 stream_start_position; + u32 dai_sample_size; + u32 ch, node_index; + u32 offset; + + if (!host_copier || !dai_copier) + return -EINVAL; + + if (host_copier->data.gtw_cfg.node_id == SOF_IPC4_INVALID_NODE_ID) + return -EINVAL; + + node_index = SOF_IPC4_NODE_INDEX(host_copier->data.gtw_cfg.node_id); + offset = offsetof(struct sof_ipc4_fw_registers, pipeline_regs) + node_index * sizeof(ppl_reg); + sof_mailbox_read(sdev, sdev->fw_info_box.offset + offset, &ppl_reg, sizeof(ppl_reg)); + if (ppl_reg.stream_start_offset == SOF_IPC4_INVALID_STREAM_POSITION) + return -EINVAL; + + stream_start_position = ppl_reg.stream_start_offset; + ch = dai_copier->data.out_format.fmt_cfg; + ch = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(ch); + dai_sample_size = (dai_copier->data.out_format.bit_depth >> 3) * ch; + /* convert offset to sample count */ + do_div(stream_start_position, dai_sample_size); + time_info->stream_start_offset = stream_start_position; + + return 0; +} + +static snd_pcm_sframes_t sof_ipc4_pcm_delay(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct sof_ipc4_timestamp_info *time_info; + struct sof_ipc4_llp_reading_slot llp; + snd_pcm_uframes_t head_ptr, tail_ptr; + struct snd_sof_pcm_stream *stream; + struct snd_sof_pcm *spcm; + u64 tmp_ptr; + int ret; + + spcm = snd_sof_find_spcm_dai(component, rtd); + if (!spcm) + return 0; + + stream = &spcm->stream[substream->stream]; + time_info = stream->private; + if (!time_info) + return 0; + + /* + * stream_start_offset is updated to memory window by FW based on + * pipeline statistics and it may be invalid if host query happens before + * the statistics is complete. And it will not change after the first initiailization. + */ + if (time_info->stream_start_offset == SOF_IPC4_INVALID_STREAM_POSITION) { + ret = sof_ipc4_get_stream_start_offset(sdev, substream, stream, time_info); + if (ret < 0) + return 0; + } + + /* + * HDaudio links don't support the LLP counter reported by firmware + * the link position is read directly from hardware registers. + */ + if (!time_info->llp_offset) { + tmp_ptr = snd_sof_pcm_get_stream_position(sdev, component, substream); + if (!tmp_ptr) + return 0; + } else { + sof_mailbox_read(sdev, time_info->llp_offset, &llp, sizeof(llp)); + tmp_ptr = ((u64)llp.reading.llp_u << 32) | llp.reading.llp_l; + } + + /* In two cases dai dma position is not accurate + * (1) dai pipeline is started before host pipeline + * (2) multiple streams mixed into one. Each stream has the same dai dma position + * + * Firmware calculates correct stream_start_offset for all cases including above two. + * Driver subtracts stream_start_offset from dai dma position to get accurate one + */ + tmp_ptr -= time_info->stream_start_offset; + + /* Calculate the delay taking into account that both pointer can wrap */ + div64_u64_rem(tmp_ptr, substream->runtime->boundary, &tmp_ptr); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + head_ptr = substream->runtime->status->hw_ptr; + tail_ptr = tmp_ptr; + } else { + head_ptr = tmp_ptr; + tail_ptr = substream->runtime->status->hw_ptr; + } + + if (head_ptr < tail_ptr) + return substream->runtime->boundary - tail_ptr + head_ptr; + + return head_ptr - tail_ptr; +} + +const struct sof_ipc_pcm_ops ipc4_pcm_ops = { + .hw_params = sof_ipc4_pcm_hw_params, + .trigger = sof_ipc4_pcm_trigger, + .hw_free = sof_ipc4_pcm_hw_free, + .dai_link_fixup = sof_ipc4_pcm_dai_link_fixup, + .pcm_setup = sof_ipc4_pcm_setup, + .pcm_free = sof_ipc4_pcm_free, + .delay = sof_ipc4_pcm_delay, + .ipc_first_on_start = true, + .platform_stop_during_hw_free = true, +}; |