ALSA: firewire-motu: parse messages for line input parameters in register DSP model

This commit parses message and cache current parameters of line input
function, available for MOTU 828 mk2 and Traveler.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20211015080826.34847-8-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

include/uapi/sound/firewire.h

@@ -164,6 +164,10 @@ struct snd_firewire_motu_register_dsp_meter {
  * @output.hp_paired_volume: The volume of paired hp output.
  * @output.hp_paired_assignment: The source assigned to paired hp output.
  * @output.reserved: Padding for 32 bit alignment for future extension.
+ * @line_input.boost_flag: The flags of boost for line inputs, only for 828mk2 and Traveler.
+ * @line_input.nominal_level_flag: The flags of nominal level for line inputs, only for 828mk2 and
+ *				   Traveler.
+ * @line_input.reserved: Padding for 32 bit alignment for future extension.
  *
  * The structure expresses the set of parameters for DSP controlled by register access.
  */
@@ -187,6 +191,11 @@ struct snd_firewire_motu_register_dsp_parameter {
 		__u8 hp_paired_assignment;
 		__u8 reserved[5];
 	} output;
+	struct {
+		__u8 boost_flag;
+		__u8 nominal_level_flag;
+		__u8 reserved[6];
+	} line_input;
 };
 
 // In below MOTU models, software is allowed to control their DSP by command in frame of

sound/firewire/motu/motu-register-dsp-message-parser.c

@@ -219,6 +219,12 @@ void snd_motu_register_dsp_message_parser_parse(struct snd_motu *motu, const str
 			case HP_OUTPUT_PAIRED_ASSIGNMENT:
 				parser->param.output.hp_paired_assignment = val;
 				break;
+			case LINE_INPUT_BOOST:
+				parser->param.line_input.boost_flag = val;
+				break;
+			case LINE_INPUT_NOMINAL_LEVEL:
+				parser->param.line_input.nominal_level_flag = val;
+				break;
 			case METER:
 			{
 				u8 pos;