From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
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,
+ ¶ms_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 = {
--
2.25.1
