// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021-2022 Intel Corporation
//
// Authors: Cezary Rojewski <[email protected]>
// Amadeusz Slawinski <[email protected]>
//
#include <sound/compress_driver.h>
#include <sound/hdaudio_ext.h>
#include <sound/hdaudio.h>
#include <sound/soc.h>
#include "avs.h"
#include "messages.h"
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;
u8 dummy;
int ret;
ret = avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
if (ret)
return ret;
/*
* Probe module uses no cycles, audio data format and input and output
* frame sizes are unused. It is also not owned by any pipeline.
*/
cfg.base.ibs = 1;
/* BSS module descriptor is always segment of index=2. */
cfg.base.is_pages = mentry.segments[2].flags.length;
cfg.gtw_cfg.node_id = node_id;
cfg.gtw_cfg.dma_buffer_size = buffer_size;
return avs_dsp_init_module(adev, mentry.module_id, INVALID_PIPELINE_ID, 0, 0, &cfg,
sizeof(cfg), &dummy);
}
static void avs_dsp_delete_probe(struct avs_dev *adev)
{
struct avs_module_entry mentry;
int ret;
ret = avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
if (!ret)
/* 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_stream_format(params->codec.ch_out, bps, params->codec.sample_rate);
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), false);
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));
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;
}
static const struct snd_soc_cdai_ops avs_probe_cdai_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,
};
static const struct snd_soc_dai_ops avs_probe_dai_ops = {
.compress_new = snd_soc_new_compress,
};
static const struct snd_compress_ops avs_probe_compress_ops = {
.copy = avs_probe_compr_copy,
};
static struct snd_soc_dai_driver probe_cpu_dais[] = {
{
.name = "Probe Extraction CPU DAI",
.cops = &avs_probe_cdai_ops,
.ops = &avs_probe_dai_ops,
.capture = {
.stream_name = "Probe Extraction",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
},
},
};
static const struct snd_soc_component_driver avs_probe_component_driver = {
.name = "avs-probe-compr",
.compress_ops = &avs_probe_compress_ops,
.module_get_upon_open = 1, /* increment refcount when a stream is opened */
};
int avs_probe_platform_register(struct avs_dev *adev, const char *name)
{
return avs_soc_component_register(adev->dev, name, &avs_probe_component_driver,
probe_cpu_dais, ARRAY_SIZE(probe_cpu_dais));
}
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