From: Daniel Baluta <daniel.baluta@xxxxxxx>
We need this to support MICFIL PDM found on i.MX8MP where the DAI link
supports only capture direction.
Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx>
---
include/sound/simple_card_utils.h | 3 +++
sound/soc/generic/audio-graph-card2.c | 6 ++++++
sound/soc/generic/simple-card-utils.c | 19 +++++++++++++++++++
3 files changed, 28 insertions(+)
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index e5da10b4c43b..ad67957b7b48 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -195,6 +195,9 @@ int graph_util_is_ports0(struct device_node *port);
int graph_util_parse_dai(struct device *dev, struct device_node *ep,
struct snd_soc_dai_link_component *dlc, int *is_single_link);
+int graph_util_parse_link_direction(struct device_node *np,
+ bool *is_playback_only, bool *is_capture_only);
+
#ifdef DEBUG
static inline void simple_util_debug_dai(struct simple_util_priv *priv,
char *name,
diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index 7146611df730..04c2eac881c2 100644
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -597,6 +597,7 @@ static void graph_link_init(struct simple_util_priv *priv,
struct device_node *ep;
struct device_node *ports;
unsigned int daifmt = 0, daiclk = 0;
+ bool playback_only = 0, capture_only = 0;
unsigned int bit_frame = 0;
if (graph_lnk_is_multi(port)) {
@@ -635,6 +636,11 @@ static void graph_link_init(struct simple_util_priv *priv,
if (is_cpu_node)
daiclk = snd_soc_daifmt_clock_provider_flipped(daiclk);
+ graph_util_parse_link_direction(port, &playback_only, &capture_only);
+
+ dai_link->playback_only = playback_only;
+ dai_link->capture_only = capture_only;
+
dai_link->dai_fmt = daifmt | daiclk;
dai_link->init = simple_util_dai_init;
dai_link->ops = &graph_ops;
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index cfa70a56ff0f..9006ef5e95f5 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -1129,6 +1129,25 @@ int graph_util_parse_dai(struct device *dev, struct device_node *ep,
}
EXPORT_SYMBOL_GPL(graph_util_parse_dai);
+int graph_util_parse_link_direction(struct device_node *np,
+ bool *playback_only, bool *capture_only)
+{
+ bool is_playback_only = false;
+ bool is_capture_only = false;
+
+ is_playback_only = of_property_read_bool(np, "playback-only");
+ is_capture_only = of_property_read_bool(np, "capture-only");
+
+ if (is_playback_only && is_capture_only)
+ return -EINVAL;
+
+ *playback_only = is_playback_only;
+ *capture_only = is_capture_only;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(graph_util_parse_link_direction);
+
/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
--
2.25.1
