ucm: parse SectionOnce section in the master UCM configuration file

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

src/ucm/parser.c

@@ -1510,6 +1510,26 @@ static int parse_master_section(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg,
 	return parse_verb_file(uc_mgr, use_case_name, comment, file);
 }
 
+/*
+ * parse controls which should be run only at initial boot
+ */
+static int parse_controls_once(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg)
+{
+	int err;
+
+	if (!list_empty(&uc_mgr->once_list)) {
+		uc_error("Once list is not empty");
+		return -EINVAL;
+	}
+	err = parse_sequence(uc_mgr, &uc_mgr->once_list, cfg);
+	if (err < 0) {
+		uc_error("Unable to parse SectionOnce");
+		return err;
+	}
+
+	return 0;
+}
+
 /*
  * parse controls
  */
@@ -1558,11 +1578,16 @@ static int parse_controls(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg)
  *	CaptureCTL "hw:CARD=0"
  * }
  *
+ * # The initial boot (run once) configuration.
+ *
+ * SectionOnce {
+ *      cset "name='Master Playback Switch',index=2 1,1"
+ *	cset "name='Master Playback Volume',index=2 25,25"
+ * }
+ *
  * # This file also stores the default sound card state.
  *
  * SectionDefaults [
- *	cset "name='Master Playback Switch',index=2 1,1"
- *	cset "name='Master Playback Volume',index=2 25,25"
  *	cset "name='Master Mono Playback',index=1 0"
  *	cset "name='Master Mono Playback Volume',index=1 0"
  *	cset "name='PCM Switch',index=2 1,1"
@@ -1636,6 +1661,14 @@ static int parse_master_file(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg)
 			continue;
 		}
 
+		/* find default control values section (first boot only) */
+		if (strcmp(id, "SectionOnce") == 0) {
+			err = parse_controls_once(uc_mgr, n);
+			if (err < 0)
+				return err;
+			continue;
+		}
+
 		/* find default control values section and parse it */
 		if (strcmp(id, "SectionDefaults") == 0) {
 			err = parse_controls(uc_mgr, n);

src/ucm/ucm_local.h

@@ -221,6 +221,9 @@ struct snd_use_case_mgr {
 	/* use case verb, devices and modifier configs parsed from files */
 	struct list_head verb_list;
 
+	/* boot settings - sequence */
+	struct list_head once_list;
+
 	/* default settings - sequence */
 	struct list_head default_list;
 

src/ucm/utils.c

@@ -567,6 +567,7 @@ void uc_mgr_free_verb(snd_use_case_mgr_t *uc_mgr)
 		list_del(&verb->list);
 		free(verb);
 	}
+	uc_mgr_free_sequence(&uc_mgr->once_list);
 	uc_mgr_free_sequence(&uc_mgr->default_list);
 	uc_mgr_free_value(&uc_mgr->value_list);
 	free(uc_mgr->comment);