From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com

The code is fork-lifted from intel.c and is mostly similar *except* for the SHIM configuration which cannot be done here with the introduction of HDAudio Extended links. The ACE2.x SOF side also requires the hw_free and trigger callbacks to be implemented for HDaudio DMA management

Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Rander Wang rander.wang@intel.com Signed-off-by: Bard Liao yung-chuan.liao@linux.intel.com --- drivers/soundwire/intel_ace2x.c | 283 ++++++++++++++++++++++++++++++++ 1 file changed, 283 insertions(+)

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c index 1be0bea5f40f..a9d25ae0b73f 100644 --- a/drivers/soundwire/intel_ace2x.c +++ b/drivers/soundwire/intel_ace2x.c @@ -10,6 +10,7 @@ #include <linux/soundwire/sdw_registers.h> #include <linux/soundwire/sdw.h> #include <linux/soundwire/sdw_intel.h> +#include <sound/pcm_params.h> #include <sound/hda-mlink.h> #include "cadence_master.h" #include "bus.h" @@ -191,10 +192,292 @@ static bool intel_check_cmdsync_unlocked(struct sdw_intel *sdw) return hdac_bus_eml_sdw_check_cmdsync_unlocked(sdw->link_res->hbus); }

+/* DAI callbacks */ +static int intel_params_stream(struct sdw_intel *sdw, + struct snd_pcm_substream *substream, + struct snd_soc_dai *dai, + struct snd_pcm_hw_params *hw_params, + int link_id, int alh_stream_id) +{ + struct sdw_intel_link_res *res = sdw->link_res; + struct sdw_intel_stream_params_data params_data; + + params_data.substream = substream; + params_data.dai = dai; + params_data.hw_params = hw_params; + params_data.link_id = link_id; + params_data.alh_stream_id = alh_stream_id; + + if (res->ops && res->ops->params_stream && res->dev) + return res->ops->params_stream(res->dev, + &params_data); + return -EIO; +} + +static int intel_free_stream(struct sdw_intel *sdw, + struct snd_pcm_substream *substream, + struct snd_soc_dai *dai, + int link_id) + +{ + struct sdw_intel_link_res *res = sdw->link_res; + struct sdw_intel_stream_free_data free_data; + + free_data.substream = substream; + free_data.dai = dai; + free_data.link_id = link_id; + + if (res->ops && res->ops->free_stream && res->dev) + return res->ops->free_stream(res->dev, + &free_data); + + return 0; +} + /* * DAI operations */ +static int intel_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); + struct sdw_intel *sdw = cdns_to_intel(cdns); + struct sdw_cdns_dai_runtime *dai_runtime; + struct sdw_cdns_pdi *pdi; + struct sdw_stream_config sconfig; + struct sdw_port_config *pconfig; + int ch, dir; + int ret; + + dai_runtime = cdns->dai_runtime_array[dai->id]; + if (!dai_runtime) + return -EIO; + + ch = params_channels(params); + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + dir = SDW_DATA_DIR_RX; + else + dir = SDW_DATA_DIR_TX; + + pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id); + + if (!pdi) { + ret = -EINVAL; + goto error; + } + + /* the SHIM will be configured in the callback functions */ + + sdw_cdns_config_stream(cdns, ch, dir, pdi); + + /* store pdi and state, may be needed in prepare step */ + dai_runtime->paused = false; + dai_runtime->suspended = false; + dai_runtime->pdi = pdi; + + /* Inform DSP about PDI stream number */ + ret = intel_params_stream(sdw, substream, dai, params, + sdw->instance, + pdi->intel_alh_id); + if (ret) + goto error; + + sconfig.direction = dir; + sconfig.ch_count = ch; + sconfig.frame_rate = params_rate(params); + sconfig.type = dai_runtime->stream_type; + + sconfig.bps = snd_pcm_format_width(params_format(params)); + + /* Port configuration */ + pconfig = kzalloc(sizeof(*pconfig), GFP_KERNEL); + if (!pconfig) { + ret = -ENOMEM; + goto error; + } + + pconfig->num = pdi->num; + pconfig->ch_mask = (1 << ch) - 1; + + ret = sdw_stream_add_master(&cdns->bus, &sconfig, + pconfig, 1, dai_runtime->stream); + if (ret) + dev_err(cdns->dev, "add master to stream failed:%d\n", ret); + + kfree(pconfig); +error: + return ret; +} + +static int intel_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); + struct sdw_intel *sdw = cdns_to_intel(cdns); + struct sdw_cdns_dai_runtime *dai_runtime; + int ch, dir; + int ret = 0; + + dai_runtime = cdns->dai_runtime_array[dai->id]; + if (!dai_runtime) { + dev_err(dai->dev, "failed to get dai runtime in %s\n", + __func__); + return -EIO; + } + + if (dai_runtime->suspended) { + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_pcm_hw_params *hw_params; + + hw_params = &rtd->dpcm[substream->stream].hw_params; + + dai_runtime->suspended = false; + + /* + * .prepare() is called after system resume, where we + * need to reinitialize the SHIM/ALH/Cadence IP. + * .prepare() is also called to deal with underflows, + * but in those cases we cannot touch ALH/SHIM + * registers + */ + + /* configure stream */ + ch = params_channels(hw_params); + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + dir = SDW_DATA_DIR_RX; + else + dir = SDW_DATA_DIR_TX; + + /* the SHIM will be configured in the callback functions */ + + sdw_cdns_config_stream(cdns, ch, dir, dai_runtime->pdi); + + /* Inform DSP about PDI stream number */ + ret = intel_params_stream(sdw, substream, dai, + hw_params, + sdw->instance, + dai_runtime->pdi->intel_alh_id); + } + + return ret; +} + +static int +intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) +{ + struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); + struct sdw_intel *sdw = cdns_to_intel(cdns); + struct sdw_cdns_dai_runtime *dai_runtime; + int ret; + + dai_runtime = cdns->dai_runtime_array[dai->id]; + if (!dai_runtime) + return -EIO; + + /* + * The sdw stream state will transition to RELEASED when stream-> + * master_list is empty. So the stream state will transition to + * DEPREPARED for the first cpu-dai and to RELEASED for the last + * cpu-dai. + */ + ret = sdw_stream_remove_master(&cdns->bus, dai_runtime->stream); + if (ret < 0) { + dev_err(dai->dev, "remove master from stream %s failed: %d\n", + dai_runtime->stream->name, ret); + return ret; + } + + ret = intel_free_stream(sdw, substream, dai, sdw->instance); + if (ret < 0) { + dev_err(dai->dev, "intel_free_stream: failed %d\n", ret); + return ret; + } + + dai_runtime->pdi = NULL; + + return 0; +} + +static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai, + void *stream, int direction) +{ + return cdns_set_sdw_stream(dai, stream, direction); +} + +static void *intel_get_sdw_stream(struct snd_soc_dai *dai, + int direction) +{ + struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); + struct sdw_cdns_dai_runtime *dai_runtime; + + dai_runtime = cdns->dai_runtime_array[dai->id]; + if (!dai_runtime) + return ERR_PTR(-EINVAL); + + return dai_runtime->stream; +} + +static int intel_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) +{ + struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); + struct sdw_intel *sdw = cdns_to_intel(cdns); + struct sdw_intel_link_res *res = sdw->link_res; + struct sdw_cdns_dai_runtime *dai_runtime; + int ret = 0; + + /* + * The .trigger callback is used to program HDaudio DMA and send required IPC to audio + * firmware. + */ + if (res->ops && res->ops->trigger) { + ret = res->ops->trigger(substream, cmd, dai); + if (ret < 0) + return ret; + } + + dai_runtime = cdns->dai_runtime_array[dai->id]; + if (!dai_runtime) { + dev_err(dai->dev, "failed to get dai runtime in %s\n", + __func__); + return -EIO; + } + + switch (cmd) { + case SNDRV_PCM_TRIGGER_SUSPEND: + + /* + * The .prepare callback is used to deal with xruns and resume operations. + * In the case of xruns, the DMAs and SHIM registers cannot be touched, + * but for resume operations the DMAs and SHIM registers need to be initialized. + * the .trigger callback is used to track the suspend case only. + */ + + dai_runtime->suspended = true; + + break; + + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dai_runtime->paused = true; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dai_runtime->paused = false; + break; + default: + break; + } + + return ret; +} + static const struct snd_soc_dai_ops intel_pcm_dai_ops = { + .hw_params = intel_hw_params, + .prepare = intel_prepare, + .hw_free = intel_hw_free, + .trigger = intel_trigger, + .set_stream = intel_pcm_set_sdw_stream, + .get_stream = intel_get_sdw_stream, };

static const struct snd_soc_component_driver dai_component = {