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// SPDX-License-Identifier: (GPL-2.0 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.
//
// Authors: Keyon Jie <yang.jie@linux.intel.com>
//
#include <sound/pcm_params.h>
#include <sound/hdaudio_ext.h>
#include "../sof-priv.h"
#include "hda.h"
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
struct hda_pipe_params {
u8 host_dma_id;
u8 link_dma_id;
u32 ch;
u32 s_freq;
u32 s_fmt;
u8 linktype;
snd_pcm_format_t format;
int link_index;
int stream;
unsigned int host_bps;
unsigned int link_bps;
};
/*
* Unlike GP dma, there is a set of stream registers in hda controller
* to control the link dma channels. Each register controls one link
* dma channel and the relation is fixed. To make sure FW uses correct
* link dma channels, host allocates stream registers and sends the
* corresponding link dma channels to FW to allocate link dma channel
*
* FIXME: this API is abused in the sense that tx_num and rx_num are
* passed as arguments, not returned. We need to find a better way to
* retrieve the stream tag allocated for the link DMA
*/
static int hda_link_dma_get_channels(struct snd_soc_dai *dai,
unsigned int *tx_num,
unsigned int *tx_slot,
unsigned int *rx_num,
unsigned int *rx_slot)
{
struct hdac_bus *bus;
struct hdac_ext_stream *stream;
struct snd_pcm_substream substream;
struct snd_sof_dev *sdev =
snd_soc_component_get_drvdata(dai->component);
bus = sof_to_bus(sdev);
memset(&substream, 0, sizeof(substream));
if (*tx_num == 1) {
substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
stream = snd_hdac_ext_stream_assign(bus, &substream,
HDAC_EXT_STREAM_TYPE_LINK);
if (!stream) {
dev_err(bus->dev, "error: failed to find a free hda ext stream for playback");
return -EBUSY;
}
snd_soc_dai_set_dma_data(dai, &substream, stream);
*tx_slot = hdac_stream(stream)->stream_tag - 1;
dev_dbg(bus->dev, "link dma channel %d for playback", *tx_slot);
}
if (*rx_num == 1) {
substream.stream = SNDRV_PCM_STREAM_CAPTURE;
stream = snd_hdac_ext_stream_assign(bus, &substream,
HDAC_EXT_STREAM_TYPE_LINK);
if (!stream) {
dev_err(bus->dev, "error: failed to find a free hda ext stream for capture");
return -EBUSY;
}
snd_soc_dai_set_dma_data(dai, &substream, stream);
*rx_slot = hdac_stream(stream)->stream_tag - 1;
dev_dbg(bus->dev, "link dma channel %d for capture", *rx_slot);
}
return 0;
}
static int hda_link_dma_params(struct hdac_ext_stream *stream,
struct hda_pipe_params *params)
{
struct hdac_stream *hstream = &stream->hstream;
unsigned char stream_tag = hstream->stream_tag;
struct hdac_bus *bus = hstream->bus;
struct hdac_ext_link *link;
unsigned int format_val;
snd_hdac_ext_stream_decouple(bus, stream, true);
snd_hdac_ext_link_stream_reset(stream);
format_val = snd_hdac_calc_stream_format(params->s_freq, params->ch,
params->format,
params->link_bps, 0);
dev_dbg(bus->dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
format_val, params->s_freq, params->ch, params->format);
snd_hdac_ext_link_stream_setup(stream, format_val);
if (stream->hstream.direction == SNDRV_PCM_STREAM_PLAYBACK) {
list_for_each_entry(link, &bus->hlink_list, list) {
if (link->index == params->link_index)
snd_hdac_ext_link_set_stream_id(link,
stream_tag);
}
}
stream->link_prepared = 1;
return 0;
}
static int hda_link_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct hdac_stream *hstream = substream->runtime->private_data;
struct hdac_bus *bus = hstream->bus;
struct hdac_ext_stream *link_dev;
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct sof_intel_hda_stream *hda_stream;
struct hda_pipe_params p_params = {0};
struct hdac_ext_link *link;
int stream_tag;
link_dev = snd_soc_dai_get_dma_data(dai, substream);
hda_stream = container_of(link_dev, struct sof_intel_hda_stream,
hda_stream);
hda_stream->hw_params_upon_resume = 0;
link = snd_hdac_ext_bus_get_link(bus, codec_dai->component->name);
if (!link)
return -EINVAL;
stream_tag = hdac_stream(link_dev)->stream_tag;
/* set the stream tag in the codec dai dma params */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_soc_dai_set_tdm_slot(codec_dai, stream_tag, 0, 0, 0);
else
snd_soc_dai_set_tdm_slot(codec_dai, 0, stream_tag, 0, 0);
p_params.s_fmt = snd_pcm_format_width(params_format(params));
p_params.ch = params_channels(params);
p_params.s_freq = params_rate(params);
p_params.stream = substream->stream;
p_params.link_dma_id = stream_tag - 1;
p_params.link_index = link->index;
p_params.format = params_format(params);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
p_params.link_bps = codec_dai->driver->playback.sig_bits;
else
p_params.link_bps = codec_dai->driver->capture.sig_bits;
return hda_link_dma_params(link_dev, &p_params);
}
static int hda_link_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdac_ext_stream *link_dev =
snd_soc_dai_get_dma_data(dai, substream);
struct sof_intel_hda_stream *hda_stream;
struct snd_sof_dev *sdev =
snd_soc_component_get_drvdata(dai->component);
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
int stream = substream->stream;
hda_stream = container_of(link_dev, struct sof_intel_hda_stream,
hda_stream);
/* setup hw_params again only if resuming from system suspend */
if (!hda_stream->hw_params_upon_resume)
return 0;
dev_dbg(sdev->dev, "hda: prepare stream dir %d\n", substream->stream);
return hda_link_hw_params(substream, &rtd->dpcm[stream].hw_params,
dai);
}
static int hda_link_pcm_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct hdac_ext_stream *link_dev =
snd_soc_dai_get_dma_data(dai, substream);
int ret;
dev_dbg(dai->dev, "In %s cmd=%d\n", __func__, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_RESUME:
/* set up hw_params */
ret = hda_link_pcm_prepare(substream, dai);
if (ret < 0) {
dev_err(dai->dev,
"error: setting up hw_params during resume\n");
return ret;
}
/* fallthrough */
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
snd_hdac_ext_link_stream_start(link_dev);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
snd_hdac_ext_link_stream_clear(link_dev);
break;
default:
return -EINVAL;
}
return 0;
}
/*
* FIXME: This API is also abused since it's used for two purposes.
* when the substream argument is NULL this function is used for cleanups
* that aren't necessarily required, and called explicitly by handling
* ASoC core structures, which is not recommended.
* This part will be reworked in follow-up patches.
*/
static int hda_link_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
const char *name;
unsigned int stream_tag;
struct hdac_bus *bus;
struct hdac_ext_link *link;
struct hdac_stream *hstream;
struct hdac_ext_stream *stream;
struct snd_soc_pcm_runtime *rtd;
struct hdac_ext_stream *link_dev;
struct snd_pcm_substream pcm_substream;
memset(&pcm_substream, 0, sizeof(pcm_substream));
if (substream) {
hstream = substream->runtime->private_data;
bus = hstream->bus;
rtd = snd_pcm_substream_chip(substream);
link_dev = snd_soc_dai_get_dma_data(dai, substream);
snd_hdac_ext_stream_decouple(bus, link_dev, false);
name = rtd->codec_dai->component->name;
link = snd_hdac_ext_bus_get_link(bus, name);
if (!link)
return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
stream_tag = hdac_stream(link_dev)->stream_tag;
snd_hdac_ext_link_clear_stream_id(link, stream_tag);
}
link_dev->link_prepared = 0;
} else {
/* release all hda streams when dai link is unloaded */
pcm_substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
stream = snd_soc_dai_get_dma_data(dai, &pcm_substream);
if (stream) {
snd_soc_dai_set_dma_data(dai, &pcm_substream, NULL);
snd_hdac_ext_stream_release(stream,
HDAC_EXT_STREAM_TYPE_LINK);
}
pcm_substream.stream = SNDRV_PCM_STREAM_CAPTURE;
stream = snd_soc_dai_get_dma_data(dai, &pcm_substream);
if (stream) {
snd_soc_dai_set_dma_data(dai, &pcm_substream, NULL);
snd_hdac_ext_stream_release(stream,
HDAC_EXT_STREAM_TYPE_LINK);
}
}
return 0;
}
static const struct snd_soc_dai_ops hda_link_dai_ops = {
.hw_params = hda_link_hw_params,
.hw_free = hda_link_hw_free,
.trigger = hda_link_pcm_trigger,
.prepare = hda_link_pcm_prepare,
.get_channel_map = hda_link_dma_get_channels,
};
#endif
/*
* common dai driver for skl+ platforms.
* some products who use this DAI array only physically have a subset of
* the DAIs, but no harm is done here by adding the whole set.
*/
struct snd_soc_dai_driver skl_dai[] = {
{
.name = "SSP0 Pin",
},
{
.name = "SSP1 Pin",
},
{
.name = "SSP2 Pin",
},
{
.name = "SSP3 Pin",
},
{
.name = "SSP4 Pin",
},
{
.name = "SSP5 Pin",
},
{
.name = "DMIC01 Pin",
},
{
.name = "DMIC16k Pin",
},
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
{
.name = "iDisp1 Pin",
.ops = &hda_link_dai_ops,
},
{
.name = "iDisp2 Pin",
.ops = &hda_link_dai_ops,
},
{
.name = "iDisp3 Pin",
.ops = &hda_link_dai_ops,
},
{
.name = "Analog CPU DAI",
.ops = &hda_link_dai_ops,
},
{
.name = "Digital CPU DAI",
.ops = &hda_link_dai_ops,
},
{
.name = "Alt Analog CPU DAI",
.ops = &hda_link_dai_ops,
},
#endif
};