ASoC: SOF: sdw: add a callback function to free resource in FW

sdw_free_stream release dma usage in FW when sdw stream is
free.

Signed-off-by: Rander Wang <rander.wang@linux.intel.com>

sound/soc/sof/intel/hda.c

@@ -81,8 +81,36 @@ static int sdw_config_stream(void *arg, void *s, void *dai,
  return ret;
 }
 
+static int sdw_free_stream(void *arg, void *s, void *dai)
+{
+ struct snd_sof_dev *sdev = arg;
+ struct sof_ipc_dai_config config;
+ struct sof_ipc_reply reply;
+ int size = sizeof(config);
+ int ret;
+
+ memset(&config, 0, size);
+ config.hdr.size = size;
+ config.hdr.cmd = SOF_IPC_GLB_DAI_MSG | SOF_IPC_DAI_CONFIG;
+ config.type = SOF_DAI_INTEL_ALH;
+ config.dai_index = 0; /* FIXME: make this dynamic */
+ config.alh.stream_id = 0xFFFFFFFF;
+
+ /* send message to DSP */
+ ret = sof_ipc_tx_message(sdev->ipc,
+ config.hdr.cmd, &config, size, &reply,
+ sizeof(reply));
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed to set DAI hw_free for ALH %d\n",
+ config.dai_index);
+ }
+
+ return ret;
+}
+
 static const struct sdw_intel_ops sdw_callback = {
  .config_stream = sdw_config_stream,
+ .free_stream = sdw_free_stream,
 };
 
 static int hda_sdw_init(struct snd_sof_dev *sdev)