ASoC: rt1308-sdw: Switch to new snd_sdw_params_to_config helper

The conversion from hw_params to SoundWire config is pretty
standard as such most of the conversion can be handled by the new
snd_sdw_params_to_config helper function.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20221123165432.594972-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1308-sdw.c

@@ -17,6 +17,7 @@
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
+#include <sound/sdw.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/initval.h>
@@ -553,11 +554,10 @@ static int rt1308_sdw_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_component *component = dai->component;
 	struct rt1308_sdw_priv *rt1308 =
 		snd_soc_component_get_drvdata(component);
-	struct sdw_stream_config stream_config;
-	struct sdw_port_config port_config;
-	enum sdw_data_direction direction;
+	struct sdw_stream_config stream_config = {0};
+	struct sdw_port_config port_config = {0};
 	struct sdw_stream_data *stream;
-	int retval, port, num_channels, ch_mask;
+	int retval;
 
 	dev_dbg(dai->dev, "%s %s", __func__, dai->name);
 	stream = snd_soc_dai_get_dma_data(dai, substream);
@@ -569,30 +569,19 @@ static int rt1308_sdw_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 
 	/* SoundWire specific configuration */
+	snd_sdw_params_to_config(substream, params, &stream_config, &port_config);
+
 	/* port 1 for playback */
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		direction = SDW_DATA_DIR_RX;
-		port = 1;
-	} else {
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		port_config.num = 1;
+	else
 		return -EINVAL;
-	}
 
 	if (rt1308->slots) {
-		num_channels = rt1308->slots;
-		ch_mask = rt1308->rx_mask;
-	} else {
-		num_channels = params_channels(params);
-		ch_mask = (1 << num_channels) - 1;
+		stream_config.ch_count = rt1308->slots;
+		port_config.ch_mask = rt1308->rx_mask;
 	}
 
-	stream_config.frame_rate = params_rate(params);
-	stream_config.ch_count = num_channels;
-	stream_config.bps = snd_pcm_format_width(params_format(params));
-	stream_config.direction = direction;
-
-	port_config.ch_mask = ch_mask;
-	port_config.num = port;
-
 	retval = sdw_stream_add_slave(rt1308->sdw_slave, &stream_config,
 				&port_config, 1, stream->sdw_stream);
 	if (retval) {