Some Sound Card might need special trigger ordering which is based on
CPU/Codec connection. It is already supported on ASoC, but Simple Audio
Card / Audio Graph Card still not support it. Let's support it.
Cc: Maxim Kochetkov <fido_max@xxxxxxxx>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
include/dt-bindings/sound/audio-graph.h | 21 ++++++++
include/sound/simple_card_utils.h | 4 ++
sound/soc/generic/simple-card-utils.c | 71 +++++++++++++++++++++++++
3 files changed, 96 insertions(+)
create mode 100644 include/dt-bindings/sound/audio-graph.h
diff --git a/include/dt-bindings/sound/audio-graph.h b/include/dt-bindings/sound/audio-graph.h
new file mode 100644
index 0000000000000..7679f1c1c12ae
--- /dev/null
+++ b/include/dt-bindings/sound/audio-graph.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * audio-graph.h
+ *
+ * Copyright (c) 2024 Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
+ */
+#ifndef __AUDIO_GRAPH_H
+#define __AUDIO_GRAPH_H
+
+/*
+ * used in
+ * link-trigger-order
+ * link-trigger-order-start
+ * link-trigger-order-stop
+ */
+#define SND_SOC_TRIGGER_LINK 0
+#define SND_SOC_TRIGGER_COMPONENT 1
+#define SND_SOC_TRIGGER_DAI 2
+#define SND_SOC_TRIGGER_SIZE 3 /* shoud be last */
+
+#endif /* __AUDIO_GRAPH_H */
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index 0a6435ac5c5fe..3360d9eab068d 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -199,6 +199,10 @@ int graph_util_parse_dai(struct device *dev, struct device_node *ep,
void graph_util_parse_link_direction(struct device_node *np,
bool *is_playback_only, bool *is_capture_only);
+void graph_util_parse_trigger_order(struct simple_util_priv *priv,
+ struct device_node *np,
+ enum snd_soc_trigger_order *trigger_start,
+ enum snd_soc_trigger_order *trigger_stop);
#ifdef DEBUG
static inline void simple_util_debug_dai(struct simple_util_priv *priv,
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index dcd0569157cef..a18de86b3c882 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -4,6 +4,7 @@
//
// Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
+#include <dt-bindings/sound/audio-graph.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
@@ -1156,6 +1157,76 @@ void graph_util_parse_link_direction(struct device_node *np,
}
EXPORT_SYMBOL_GPL(graph_util_parse_link_direction);
+static enum snd_soc_trigger_order
+__graph_util_parse_trigger_order(struct simple_util_priv *priv,
+ struct device_node *np,
+ const char *prop)
+{
+ u32 val[SND_SOC_TRIGGER_SIZE];
+ int ret;
+
+ ret = of_property_read_u32_array(np, prop, val, SND_SOC_TRIGGER_SIZE);
+ if (ret == 0) {
+ struct device *dev = simple_priv_to_dev(priv);
+ u32 order = (val[0] << 8) +
+ (val[1] << 4) +
+ (val[2]);
+
+ switch (order) {
+ case (SND_SOC_TRIGGER_LINK << 8) +
+ (SND_SOC_TRIGGER_COMPONENT << 4) +
+ (SND_SOC_TRIGGER_DAI):
+ return SND_SOC_TRIGGER_ORDER_DEFAULT;
+
+ case (SND_SOC_TRIGGER_LINK << 8) +
+ (SND_SOC_TRIGGER_DAI << 4) +
+ (SND_SOC_TRIGGER_COMPONENT):
+ return SND_SOC_TRIGGER_ORDER_LDC;
+
+ default:
+ dev_err(dev, "unsupported trigger order [0x%x]\n", order);
+ }
+ }
+
+ /* SND_SOC_TRIGGER_ORDER_MAX means error */
+ return SND_SOC_TRIGGER_ORDER_MAX;
+}
+
+void graph_util_parse_trigger_order(struct simple_util_priv *priv,
+ struct device_node *np,
+ enum snd_soc_trigger_order *trigger_start,
+ enum snd_soc_trigger_order *trigger_stop)
+{
+ static enum snd_soc_trigger_order order;
+
+ /*
+ * We can use it like below
+ *
+ * #include <dt-bindings/sound/audio-graph.h>
+ *
+ * link-trigger-order = <SND_SOC_TRIGGER_LINK
+ * SND_SOC_TRIGGER_COMPONENT
+ * SND_SOC_TRIGGER_DAI>;
+ */
+
+ order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order");
+ if (order < SND_SOC_TRIGGER_ORDER_MAX) {
+ *trigger_start = order;
+ *trigger_stop = order;
+ }
+
+ order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-start");
+ if (order < SND_SOC_TRIGGER_ORDER_MAX)
+ *trigger_start = order;
+
+ order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-stop");
+ if (order < SND_SOC_TRIGGER_ORDER_MAX)
+ *trigger_stop = order;
+
+ return;
+}
+EXPORT_SYMBOL_GPL(graph_util_parse_trigger_order);
+
/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
--
2.43.0
