ASoC: SOF: Intel: hda: add new flags for DAI_CONFIG

The DAI_CONFIG is used for both hw_params and hw_free. Use flags to
specify what stage the configuration applies to.

the DAI_CONFIG IPC may be sent also during the widget setup so each
flag is cleared after the IPC to restore the state.

Signed-off-by: Pierre-Louis Bossart <[e-mail]>
Reviewed-by: Bard Liao <[e-mail]>
Reviewed-by: Guennadi Liakhovetski <[e-mail]>
Reviewed-by: Brent Lu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/sof/intel/hda.c

···
 		return ret;
 	}
 
+	/* set HW_PARAMS flag */
+	config->flags = FIELD_PREP(SOF_DAI_CONFIG_FLAGS_MASK, SOF_DAI_CONFIG_FLAGS_HW_PARAMS);
+
 	/* send DAI_CONFIG IPC */
 	ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
 				 &reply, sizeof(reply));
···
 		return 0;
 
 	config = &sof_dai->dai_config[sof_dai->current_config];
+
+	/* set HW_FREE flag */
+	config->flags = FIELD_PREP(SOF_DAI_CONFIG_FLAGS_MASK, SOF_DAI_CONFIG_FLAGS_HW_FREE);
 
 	ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
 				 &reply, sizeof(reply));

sound/soc/sof/sof-audio.c

···
 // Author: Ranjani Sridharan <[e-mail]>
 //
 
+#include <linux/bitfield.h>
 #include "sof-audio.h"
 #include "ops.h"
 
···
 		dev_err(sdev->dev, "error: no config for DAI %s\n", dai->name);
 		return -EINVAL;
 	}
+
+	/* set NONE flag to clear all previous settings */
+	config->flags = FIELD_PREP(SOF_DAI_CONFIG_FLAGS_MASK, SOF_DAI_CONFIG_FLAGS_NONE);
 
 	ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
 				 &reply, sizeof(reply));