ASoC: rt1321: fix DMIC ch2/3 mask issue

This patch fixed the DMIC ch2/3 mask missing problem.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://patch.msgid.link/20260225091210.3648905-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: shumingfan

sound/soc/codecs/rt1320-sdw.c

@@ -2629,7 +2629,7 @@ static int rt1320_sdw_hw_params(struct snd_pcm_substream *substream,
 	struct sdw_port_config port_config;
 	struct sdw_port_config dmic_port_config[2];
 	struct sdw_stream_runtime *sdw_stream;
-	int retval;
+	int retval, num_channels;
 	unsigned int sampling_rate;
 
 	dev_dbg(dai->dev, "%s %s", __func__, dai->name);
@@ -2661,7 +2661,8 @@ static int rt1320_sdw_hw_params(struct snd_pcm_substream *substream,
 				dmic_port_config[1].num = 10;
 				break;
 			case RT1321_DEV_ID:
-				dmic_port_config[0].ch_mask = BIT(0) | BIT(1);
+				num_channels = params_channels(params);
+				dmic_port_config[0].ch_mask = GENMASK(num_channels - 1, 0);
 				dmic_port_config[0].num = 8;
 				break;
 			default: