Add compress operations handlers for data extraction through probes. A single HDAudio stream is enlisted for said purpose. Operations follow same protocol as for standard PCM streaming on HOST side.
Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com --- sound/soc/intel/Kconfig | 1 + sound/soc/intel/avs/avs.h | 3 + sound/soc/intel/avs/probes.c | 224 ++++++++++++++++++++++++++++++++++- 3 files changed, 225 insertions(+), 3 deletions(-)
diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig index ac799de4f7fd..4b9e498e3303 100644 --- a/sound/soc/intel/Kconfig +++ b/sound/soc/intel/Kconfig @@ -217,6 +217,7 @@ config SND_SOC_INTEL_AVS select SND_SOC_ACPI if ACPI select SND_SOC_TOPOLOGY select SND_SOC_HDA + select SND_SOC_COMPRESS if DEBUG_FS select SND_HDA_EXT_CORE select SND_HDA_DSP_LOADER select SND_INTEL_DSP_CONFIG diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h index 7a9fb27d3845..e5e7c72eb511 100644 --- a/sound/soc/intel/avs/avs.h +++ b/sound/soc/intel/avs/avs.h @@ -144,6 +144,9 @@ struct avs_dev { u32 aging_timer_period; u32 fifo_full_timer_period; u32 logged_resources; /* context dependent: core or library */ + /* probes */ + struct hdac_ext_stream *extractor; + unsigned int num_probe_streams; #endif };
diff --git a/sound/soc/intel/avs/probes.c b/sound/soc/intel/avs/probes.c index 339bad6fec22..e90284ec8500 100644 --- a/sound/soc/intel/avs/probes.c +++ b/sound/soc/intel/avs/probes.c @@ -6,13 +6,15 @@ // Amadeusz Slawinski amadeuszx.slawinski@linux.intel.com //
+#include <sound/compress_driver.h> +#include <sound/hdaudio_ext.h> +#include <sound/hdaudio.h> +#include <sound/soc.h> #include "avs.h" #include "messages.h"
-__maybe_unused static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id node_id, size_t buffer_size) - { struct avs_probe_cfg cfg = {{0}}; struct avs_module_entry mentry; @@ -34,7 +36,6 @@ static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id sizeof(cfg), &dummy); }
-__maybe_unused static void avs_dsp_delete_probe(struct avs_dev *adev) { struct avs_module_entry mentry; @@ -44,3 +45,220 @@ static void avs_dsp_delete_probe(struct avs_dev *adev) /* There is only ever one probe module instance. */ avs_dsp_delete_module(adev, mentry.module_id, 0, INVALID_PIPELINE_ID, 0); } + +static inline struct hdac_ext_stream *avs_compr_get_host_stream(struct snd_compr_stream *cstream) +{ + return cstream->runtime->private_data; +} + +static int avs_probe_compr_open(struct snd_compr_stream *cstream, struct snd_soc_dai *dai) +{ + struct avs_dev *adev = to_avs_dev(dai->dev); + struct hdac_bus *bus = &adev->base.core; + struct hdac_ext_stream *host_stream; + + if (adev->extractor) { + dev_err(dai->dev, "Cannot open more than one extractor stream\n"); + return -EEXIST; + } + + host_stream = snd_hdac_ext_cstream_assign(bus, cstream); + if (!host_stream) { + dev_err(dai->dev, "Failed to assign HDAudio stream for extraction\n"); + return -EBUSY; + } + + adev->extractor = host_stream; + hdac_stream(host_stream)->curr_pos = 0; + cstream->runtime->private_data = host_stream; + + return 0; +} + +static int avs_probe_compr_free(struct snd_compr_stream *cstream, struct snd_soc_dai *dai) +{ + struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream); + struct avs_dev *adev = to_avs_dev(dai->dev); + struct avs_probe_point_desc *desc; + /* Extractor node identifier. */ + unsigned int vindex = INVALID_NODE_ID.vindex; + size_t num_desc; + int i, ret; + + /* Disconnect all probe points. */ + ret = avs_ipc_probe_get_points(adev, &desc, &num_desc); + if (ret) { + dev_err(dai->dev, "get probe points failed: %d\n", ret); + ret = AVS_IPC_RET(ret); + goto exit; + } + + for (i = 0; i < num_desc; i++) + if (desc[i].node_id.vindex == vindex) + avs_ipc_probe_disconnect_points(adev, &desc[i].id, 1); + kfree(desc); + +exit: + if (adev->num_probe_streams) { + adev->num_probe_streams--; + if (!adev->num_probe_streams) { + avs_dsp_delete_probe(adev); + avs_dsp_enable_d0ix(adev); + } + } + + snd_hdac_stream_cleanup(hdac_stream(host_stream)); + hdac_stream(host_stream)->prepared = 0; + snd_hdac_ext_stream_release(host_stream, HDAC_EXT_STREAM_TYPE_HOST); + + snd_compr_free_pages(cstream); + adev->extractor = NULL; + + return ret; +} + +static int avs_probe_compr_set_params(struct snd_compr_stream *cstream, + struct snd_compr_params *params, struct snd_soc_dai *dai) +{ + struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream); + struct snd_compr_runtime *rtd = cstream->runtime; + struct avs_dev *adev = to_avs_dev(dai->dev); + /* compr params do not store bit depth, default to S32_LE. */ + snd_pcm_format_t format = SNDRV_PCM_FORMAT_S32_LE; + unsigned int format_val; + int bps, ret; + + hdac_stream(host_stream)->bufsize = 0; + hdac_stream(host_stream)->period_bytes = 0; + hdac_stream(host_stream)->format_val = 0; + cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG; + cstream->dma_buffer.dev.dev = adev->dev; + + ret = snd_compr_malloc_pages(cstream, rtd->buffer_size); + if (ret < 0) + return ret; + bps = snd_pcm_format_physical_width(format); + if (bps < 0) + return bps; + format_val = snd_hdac_calc_stream_format(params->codec.sample_rate, params->codec.ch_out, + format, bps, 0); + ret = snd_hdac_stream_set_params(hdac_stream(host_stream), format_val); + if (ret < 0) + return ret; + ret = snd_hdac_stream_setup(hdac_stream(host_stream)); + if (ret < 0) + return ret; + + hdac_stream(host_stream)->prepared = 1; + + if (!adev->num_probe_streams) { + union avs_connector_node_id node_id; + + /* D0ix not allowed during probing. */ + ret = avs_dsp_disable_d0ix(adev); + if (ret) + return ret; + + node_id.vindex = hdac_stream(host_stream)->stream_tag - 1; + node_id.dma_type = AVS_DMA_HDA_HOST_INPUT; + + ret = avs_dsp_init_probe(adev, node_id, rtd->dma_bytes); + if (ret < 0) { + dev_err(dai->dev, "probe init failed: %d\n", ret); + avs_dsp_enable_d0ix(adev); + return ret; + } + } + + adev->num_probe_streams++; + return 0; +} + +static int avs_probe_compr_trigger(struct snd_compr_stream *cstream, int cmd, + struct snd_soc_dai *dai) +{ + struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream); + struct avs_dev *adev = to_avs_dev(dai->dev); + struct hdac_bus *bus = &adev->base.core; + unsigned long cookie; + + if (!hdac_stream(host_stream)->prepared) + return -EPIPE; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + spin_lock_irqsave(&bus->reg_lock, cookie); + snd_hdac_stream_start(hdac_stream(host_stream), true); + spin_unlock_irqrestore(&bus->reg_lock, cookie); + break; + + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + spin_lock_irqsave(&bus->reg_lock, cookie); + snd_hdac_stream_stop(hdac_stream(host_stream)); + spin_unlock_irqrestore(&bus->reg_lock, cookie); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int avs_probe_compr_pointer(struct snd_compr_stream *cstream, + struct snd_compr_tstamp *tstamp, struct snd_soc_dai *dai) +{ + struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream); + struct snd_soc_pcm_stream *pstream; + + pstream = &dai->driver->capture; + tstamp->copied_total = hdac_stream(host_stream)->curr_pos; + tstamp->sampling_rate = snd_pcm_rate_bit_to_rate(pstream->rates); + + return 0; +} + +static int avs_probe_compr_copy(struct snd_soc_component *comp, struct snd_compr_stream *cstream, + char __user *buf, size_t count) +{ + struct snd_compr_runtime *rtd = cstream->runtime; + unsigned int offset, n; + void *ptr; + int ret; + + if (count > rtd->buffer_size) + count = rtd->buffer_size; + + div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset); + ptr = rtd->dma_area + offset; + n = rtd->buffer_size - offset; + + if (count < n) { + ret = copy_to_user(buf, ptr, count); + } else { + ret = copy_to_user(buf, ptr, n); + ret += copy_to_user(buf + n, rtd->dma_area, count - n); + } + + if (ret) + return count - ret; + return count; +} + +__maybe_unused +static const struct snd_soc_cdai_ops avs_probe_dai_ops = { + .startup = avs_probe_compr_open, + .shutdown = avs_probe_compr_free, + .set_params = avs_probe_compr_set_params, + .trigger = avs_probe_compr_trigger, + .pointer = avs_probe_compr_pointer, +}; + +__maybe_unused +static const struct snd_compress_ops avs_probe_compress_ops = { + .copy = avs_probe_compr_copy, +};