audio: dax: add multichannel support

Add 5.1, 7.1 input channels for DAX.

Signed-off-by: Jun Lai <jun.lai@dolby.com>

Author: checkupup

src/audio/module_adapter/module/dolby/dax.c

@@ -76,6 +76,8 @@ static int sof_to_dax_channels(uint32_t channels)
 {
 	switch (channels) {
 	case 2:
+	case 6 /* 5.1 */:
+	case 8 /* 7.1 */:
 		return channels;
 	default:
 		return DAX_CHANNLES_UNSUPPORTED;

tools/topology/topology2/include/pipelines/cavs/mixout-gain-dax-dai-copier-playback.conf

@@ -31,15 +31,15 @@ Class.Pipeline."mixout-gain-dax-dai-copier-playback" {
 							in_rate			48000
 							in_bit_depth		32
 							in_valid_bit_depth	32
-							ibs			"$[512 * ($in_bit_depth / 8) ]"
+							ibs			"$[(256 * ($[($in_bit_depth / 8)])) * ($in_channels)]"
 						}
 					]
 					Object.Base.output_audio_format [
 						{
 							out_rate		48000
 							out_bit_depth		32
 							out_valid_bit_depth	32
-							obs			"$[512 * ($out_bit_depth / 8) ]"
+							obs			"$[(256 * ($[($out_bit_depth / 8)])) * ($out_channels)]"
 						}
 					]
 				}