Add support to pcm dais in Audio Process Manager.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/qcom/Kconfig | 5 + sound/soc/qcom/qdsp6/Makefile | 1 + sound/soc/qcom/qdsp6/q6apm-dai.c | 416 +++++++++++++++++++++++++++++++ 3 files changed, 422 insertions(+) create mode 100644 sound/soc/qcom/qdsp6/q6apm-dai.c
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig index 66d8436ab0a8..2e5625b93b38 100644 --- a/sound/soc/qcom/Kconfig +++ b/sound/soc/qcom/Kconfig @@ -84,8 +84,13 @@ config SND_SOC_QDSP6_ASM_DAI select SND_SOC_COMPRESS tristate
+config SND_SOC_QDSP6_APM_DAI + tristate + select SND_SOC_COMPRESS + config SND_SOC_QDSP6_APM tristate + select SND_SOC_QDSP6_APM_DAI
config SND_SOC_QDSP6 tristate "SoC ALSA audio driver for QDSP6" diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile index 766b824f6597..a4ec7c4d0e48 100644 --- a/sound/soc/qcom/qdsp6/Makefile +++ b/sound/soc/qcom/qdsp6/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o obj-$(CONFIG_SND_SOC_QDSP6_ASM_DAI) += q6asm-dai.o
obj-$(CONFIG_SND_SOC_QDSP6_APM) += snd-q6apm.o +obj-$(CONFIG_SND_SOC_QDSP6_APM_DAI) += q6apm-dai.o diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c new file mode 100644 index 000000000000..eb1c3aec479b --- /dev/null +++ b/sound/soc/qcom/qdsp6/q6apm-dai.c @@ -0,0 +1,416 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2021, Linaro Limited + +#include <linux/init.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/pcm.h> +#include <asm/dma.h> +#include <linux/dma-mapping.h> +#include <linux/of_device.h> +#include <sound/pcm_params.h> +#include "q6apm.h" + +#define DRV_NAME "q6apm-dai" + +#define PLAYBACK_MIN_NUM_PERIODS 2 +#define PLAYBACK_MAX_NUM_PERIODS 8 +#define PLAYBACK_MAX_PERIOD_SIZE 65536 +#define PLAYBACK_MIN_PERIOD_SIZE 128 +#define CAPTURE_MIN_NUM_PERIODS 2 +#define CAPTURE_MAX_NUM_PERIODS 8 +#define CAPTURE_MAX_PERIOD_SIZE 4096 +#define CAPTURE_MIN_PERIOD_SIZE 320 +#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE) +#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE) +#define SID_MASK_DEFAULT 0xF + +enum stream_state { + Q6APM_STREAM_IDLE = 0, + Q6APM_STREAM_STOPPED, + Q6APM_STREAM_RUNNING, +}; + +struct q6apm_dai_rtd { + struct snd_pcm_substream *substream; + struct snd_compr_stream *cstream; + struct snd_compr_params codec_param; + struct snd_dma_buffer dma_buffer; + phys_addr_t phys; + unsigned int pcm_size; + unsigned int pcm_count; + unsigned int pos; /* Buffer position */ + unsigned int periods; + unsigned int bytes_sent; + unsigned int bytes_received; + unsigned int copied_total; + uint16_t bits_per_sample; + uint16_t source; /* Encoding source bit mask */ + uint16_t session_id; + enum stream_state state; + struct q6apm_graph *graph; +}; + +struct q6apm_dai_data { + long long sid; +}; + +static struct snd_pcm_hardware q6apm_dai_hardware_capture = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE), + .rates = SNDRV_PCM_RATE_8000_48000, + .rate_min = 8000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 4, + .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, + .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, + .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, + .periods_min = CAPTURE_MIN_NUM_PERIODS, + .periods_max = CAPTURE_MAX_NUM_PERIODS, + .fifo_size = 0, +}; + +static struct snd_pcm_hardware q6apm_dai_hardware_playback = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE), + .rates = SNDRV_PCM_RATE_8000_192000, + .rate_min = 8000, + .rate_max = 192000, + .channels_min = 2, + .channels_max = 8, + .buffer_bytes_max = (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE), + .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, + .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, + .periods_min = PLAYBACK_MIN_NUM_PERIODS, + .periods_max = PLAYBACK_MAX_NUM_PERIODS, + .fifo_size = 0, +}; + +static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv) +{ + struct q6apm_dai_rtd *prtd = priv; + struct snd_pcm_substream *substream = prtd->substream; + + switch (opcode) { + case APM_CLIENT_EVENT_CMD_EOS_DONE: + prtd->state = Q6APM_STREAM_STOPPED; + break; + case APM_CLIENT_EVENT_DATA_WRITE_DONE: + prtd->pos += prtd->pcm_count; + snd_pcm_period_elapsed(substream); + if (prtd->state == Q6APM_STREAM_RUNNING) + q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0); + + break; + case APM_CLIENT_EVENT_DATA_READ_DONE: + prtd->pos += prtd->pcm_count; + snd_pcm_period_elapsed(substream); + if (prtd->state == Q6APM_STREAM_RUNNING) + q6apm_read(prtd->graph); + + break; + default: + break; + } +} + +static int q6apm_dai_prepare(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct q6apm_dai_rtd *prtd = runtime->private_data; + struct audioreach_module_config cfg; + struct device *dev = component->dev; + struct q6apm_dai_data *pdata; + int ret; + + pdata = snd_soc_component_get_drvdata(component); + if (!pdata) + return -EINVAL; + + if (!prtd || !prtd->graph) { + dev_err(dev, "%s: private data null or audio client freed\n", __func__); + return -EINVAL; + } + + cfg.direction = substream->stream; + cfg.sample_rate = runtime->rate; + cfg.num_channels = runtime->channels; + cfg.bit_width = prtd->bits_per_sample; + + prtd->pcm_count = snd_pcm_lib_period_bytes(substream); + prtd->pos = 0; + /* rate and channels are sent to audio driver */ + ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg); + if (ret < 0) { + dev_err(dev, "%s: q6apm_open_write failed\n", __func__); + return ret; + } + + ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg); + if (ret < 0) + dev_err(dev, "%s: CMD Format block failed\n", __func__); + + ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys, + (prtd->pcm_size / prtd->periods), prtd->periods); + + if (ret < 0) { + dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n", ret); + return -ENOMEM; + } + + ret = q6apm_graph_prepare(prtd->graph); + if (ret) { + dev_err(dev, "Failed to prepare Graph %d\n", ret); + return ret; + } + + ret = q6apm_graph_start(prtd->graph); + if (ret) { + dev_err(dev, "Failed to Start Graph %d\n", ret); + return ret; + } + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + int i; + /* Queue the buffers for Capture ONLY after graph is started */ + for (i = 0; i < runtime->periods; i++) + q6apm_read(prtd->graph); + + } + + /* Now that graph as been prepared and started update the internal state accordingly */ + prtd->state = Q6APM_STREAM_RUNNING; + + return 0; +} + +static int q6apm_dai_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct q6apm_dai_rtd *prtd = runtime->private_data; + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + /* start writing buffers for playback only as we already queued capture buffers */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0); + break; + case SNDRV_PCM_TRIGGER_STOP: + /* TODO support be handled via SoftPause Module */ + prtd->state = Q6APM_STREAM_STOPPED; + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int q6apm_dai_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *soc_prtd = substream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0); + struct device *dev = component->dev; + struct q6apm_dai_data *pdata; + struct q6apm_dai_rtd *prtd; + int graph_id, ret; + + graph_id = cpu_dai->driver->id; + + pdata = snd_soc_component_get_drvdata(component); + if (!pdata) { + dev_err(dev, "Drv data not found ..\n"); + return -EINVAL; + } + + prtd = kzalloc(sizeof(*prtd), GFP_KERNEL); + if (prtd == NULL) + return -ENOMEM; + + prtd->substream = substream; + prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id); + if (IS_ERR(prtd->graph)) { + dev_err(dev, "%s: Could not allocate memory\n", __func__); + ret = PTR_ERR(prtd->graph); + goto err; + } + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + runtime->hw = q6apm_dai_hardware_playback; + else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + runtime->hw = q6apm_dai_hardware_capture; + + /* Ensure that buffer size is a multiple of period size */ + ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + dev_err(dev, "snd_pcm_hw_constraint_integer failed\n"); + goto err; + } + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + BUFFER_BYTES_MIN, BUFFER_BYTES_MAX); + if (ret < 0) { + dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret); + goto err; + } + } + + ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); + if (ret < 0) { + dev_err(dev, "constraint for period bytes step ret = %d\n", ret); + goto err; + } + + ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); + if (ret < 0) { + dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret); + goto err; + } + + runtime->private_data = prtd; + runtime->dma_bytes = BUFFER_BYTES_MAX; + if (pdata->sid < 0) + prtd->phys = substream->dma_buffer.addr; + else + prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32); + + return 0; +err: + kfree(prtd); + + return ret; +} + +static int q6apm_dai_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct q6apm_dai_rtd *prtd = runtime->private_data; + + q6apm_graph_stop(prtd->graph); + q6apm_unmap_memory_regions(prtd->graph, substream->stream); + q6apm_graph_close(prtd->graph); + prtd->graph = NULL; + kfree(prtd); + runtime->private_data = NULL; + + return 0; +} + +static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct q6apm_dai_rtd *prtd = runtime->private_data; + + if (prtd->pos == prtd->pcm_size) + prtd->pos = 0; + + return bytes_to_frames(runtime, prtd->pos); +} + +static int q6apm_dai_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct q6apm_dai_rtd *prtd = runtime->private_data; + + prtd->pcm_size = params_buffer_bytes(params); + prtd->periods = params_periods(params); + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + prtd->bits_per_sample = 16; + break; + case SNDRV_PCM_FORMAT_S24_LE: + prtd->bits_per_sample = 24; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) +{ + int size = BUFFER_BYTES_MAX; + + return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size); +} + +static const struct snd_soc_component_driver q6apm_fe_dai_component = { + .name = DRV_NAME, + .open = q6apm_dai_open, + .close = q6apm_dai_close, + .prepare = q6apm_dai_prepare, + .pcm_construct = q6apm_dai_pcm_new, + .hw_params = q6apm_dai_hw_params, + .pointer = q6apm_dai_pointer, + .trigger = q6apm_dai_trigger, +}; + +static int q6apm_dai_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct q6apm_dai_data *pdata; + struct of_phandle_args args; + int rc; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args); + if (rc < 0) + pdata->sid = -1; + else + pdata->sid = args.args[0] & SID_MASK_DEFAULT; + + dev_set_drvdata(dev, pdata); + + return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0); +} + +#ifdef CONFIG_OF +static const struct of_device_id q6apm_dai_device_id[] = { + { .compatible = "qcom,q6apm-dais" }, + {}, +}; +MODULE_DEVICE_TABLE(of, q6apm_dai_device_id); +#endif + +static struct platform_driver q6apm_dai_platform_driver = { + .driver = { + .name = "q6apm-dai", + .of_match_table = of_match_ptr(q6apm_dai_device_id), + }, + .probe = q6apm_dai_probe, +}; +module_platform_driver(q6apm_dai_platform_driver); + +MODULE_DESCRIPTION("Q6APM dai driver"); +MODULE_LICENSE("GPL");