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// 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) 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 "../sof-audio.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;
};
/*
* This function checks if the host dma channel corresponding
* to the link DMA stream_tag argument is assigned to one
* of the FEs connected to the BE DAI.
*/
static bool hda_check_fes(struct snd_soc_pcm_runtime *rtd,
int dir, int stream_tag)
{
struct snd_pcm_substream *fe_substream;
struct hdac_stream *fe_hstream;
struct snd_soc_dpcm *dpcm;
for_each_dpcm_fe(rtd, dir, dpcm) {
fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, dir);
fe_hstream = fe_substream->runtime->private_data;
if (fe_hstream->stream_tag == stream_tag)
return true;
}
return false;
}
static struct hdac_ext_stream *
hda_link_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sof_intel_hda_stream *hda_stream;
struct hdac_ext_stream *res = NULL;
struct hdac_stream *stream = NULL;
int stream_dir = substream->stream;
if (!bus->ppcap) {
dev_err(bus->dev, "stream type not supported\n");
return NULL;
}
list_for_each_entry(stream, &bus->stream_list, list) {
struct hdac_ext_stream *hstream =
stream_to_hdac_ext_stream(stream);
if (stream->direction != substream->stream)
continue;
hda_stream = hstream_to_sof_hda_stream(hstream);
/* check if link is available */
if (!hstream->link_locked) {
if (stream->opened) {
/*
* check if the stream tag matches the stream
* tag of one of the connected FEs
*/
if (hda_check_fes(rtd, stream_dir,
stream->stream_tag)) {
res = hstream;
break;
}
} else {
res = hstream;
/*
* This must be a hostless stream.
* So reserve the host DMA channel.
*/
hda_stream->host_reserved = 1;
break;
}
}
}
if (res) {
/*
* Decouple host and link DMA. The decoupled flag
* is updated in snd_hdac_ext_stream_decouple().
*/
if (!res->decoupled)
snd_hdac_ext_stream_decouple(bus, res, true);
spin_lock_irq(&bus->reg_lock);
res->link_locked = 1;
res->link_substream = substream;
spin_unlock_irq(&bus->reg_lock);
}
return res;
}
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;
}
/* Send DAI_CONFIG IPC to the DAI that matches the dai_name and direction */
static int hda_link_config_ipc(struct sof_intel_hda_stream *hda_stream,
const char *dai_name, int channel, int dir)
{
struct sof_ipc_dai_config *config;
struct snd_sof_dai *sof_dai;
struct sof_ipc_reply reply;
int ret = 0;
list_for_each_entry(sof_dai, &hda_stream->sdev->dai_list, list) {
if (!sof_dai->cpu_dai_name)
continue;
if (!strcmp(dai_name, sof_dai->cpu_dai_name) &&
dir == sof_dai->comp_dai.direction) {
config = sof_dai->dai_config;
if (!config) {
dev_err(hda_stream->sdev->dev,
"error: no config for DAI %s\n",
sof_dai->name);
return -EINVAL;
}
/* update config with stream tag */
config->hda.link_dma_ch = channel;
/* send IPC */
ret = sof_ipc_tx_message(hda_stream->sdev->ipc,
config->hdr.cmd,
config,
config->hdr.size,
&reply, sizeof(reply));
if (ret < 0)
dev_err(hda_stream->sdev->dev,
"error: failed to set dai config for %s\n",
sof_dai->name);
return ret;
}
}
return -EINVAL;
}
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 = asoc_rtd_to_codec(rtd, 0);
struct sof_intel_hda_stream *hda_stream;
struct hda_pipe_params p_params = {0};
struct hdac_ext_link *link;
int stream_tag;
int ret;
/* get stored dma data if resuming from system suspend */
link_dev = snd_soc_dai_get_dma_data(dai, substream);
if (!link_dev) {
link_dev = hda_link_stream_assign(bus, substream);
if (!link_dev)
return -EBUSY;
snd_soc_dai_set_dma_data(dai, substream, (void *)link_dev);
}
stream_tag = hdac_stream(link_dev)->stream_tag;
hda_stream = hstream_to_sof_hda_stream(link_dev);
/* update the DSP with the new tag */
ret = hda_link_config_ipc(hda_stream, dai->name, stream_tag - 1,
substream->stream);
if (ret < 0)
return ret;
link = snd_hdac_ext_bus_get_link(
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