Until now dai_link uses dynamic PCM in the following conditions:
* it is dpcm_selectable (this means compatible string is simple-scu-card)
* it has convert-xxx property
* or it has more than one CPU DAIs
Our use case requires to be able to build a DPCM link with just 1 CPU.
Add force-dpcm DT property to realize this.
Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx>
---
include/sound/simple_card_utils.h | 4 ++++
sound/soc/generic/simple-card-utils.c | 17 +++++++++++++++++
sound/soc/generic/simple-card.c | 25 +++++++++++++++++++++++--
3 files changed, 44 insertions(+), 2 deletions(-)
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index 985a5f583de4..0578bbfa4a24 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -48,6 +48,7 @@ struct asoc_simple_priv {
struct asoc_simple_data adata;
struct snd_soc_codec_conf *codec_conf;
unsigned int mclk_fs;
+ unsigned int force_dpcm;
} *dai_props;
struct asoc_simple_jack hp_jack;
struct asoc_simple_jack mic_jack;
@@ -120,6 +121,9 @@ void asoc_simple_convert_fixup(struct asoc_simple_data *data,
void asoc_simple_parse_convert(struct device *dev,
struct device_node *np, char *prefix,
struct asoc_simple_data *data);
+void asoc_simple_parse_force_dpcm(struct device *dev,
+ struct device_node *np, char *prefix,
+ unsigned int *force_dpcm);
int asoc_simple_parse_routing(struct snd_soc_card *card,
char *prefix);
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 9b794775df53..2f03a73f8a8a 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -52,6 +52,23 @@ void asoc_simple_parse_convert(struct device *dev,
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
+void asoc_simple_parse_force_dpcm(struct device *dev,
+ struct device_node *np,
+ char *prefix,
+ unsigned int *force_dpcm)
+{
+ char prop[128];
+
+ if (!prefix)
+ prefix = "";
+
+ /* dpcm property */
+ snprintf(prop, sizeof(prop), "%s%s", prefix, "force-dpcm");
+ if (of_find_property(np, prop, NULL))
+ *force_dpcm = 1;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_parse_force_dpcm);
+
int asoc_simple_parse_daifmt(struct device *dev,
struct device_node *node,
struct device_node *codec,
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index fc9c753db8dd..e40e22c8813b 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -92,6 +92,21 @@ static void simple_parse_convert(struct device *dev,
of_node_put(node);
}
+static void simple_parse_force_dpcm(struct device *dev,
+ struct device_node *np,
+ unsigned int *force_dpcm)
+{
+ struct device_node *top = dev->of_node;
+ struct device_node *node = of_get_parent(np);
+
+ asoc_simple_parse_force_dpcm(dev, top, PREFIX, force_dpcm);
+ asoc_simple_parse_force_dpcm(dev, node, PREFIX, force_dpcm);
+ asoc_simple_parse_force_dpcm(dev, node, NULL, force_dpcm);
+ asoc_simple_parse_force_dpcm(dev, np, NULL, force_dpcm);
+
+ of_node_put(node);
+}
+
static void simple_parse_mclk_fs(struct device_node *top,
struct device_node *cpu,
struct device_node *codec,
@@ -372,6 +387,7 @@ static int simple_for_each_link(struct asoc_simple_priv *priv,
struct asoc_simple_data adata;
struct device_node *codec;
struct device_node *np;
+ unsigned int force_dpcm = 0;
int num = of_get_child_count(node);
/* get codec */
@@ -387,15 +403,20 @@ static int simple_for_each_link(struct asoc_simple_priv *priv,
for_each_child_of_node(node, np)
simple_parse_convert(dev, np, &adata);
+ /* get force-dpcm property */
+ for_each_child_of_node(node, np)
+ simple_parse_force_dpcm(dev, np, &force_dpcm);
+
/* loop for all CPU/Codec node */
for_each_child_of_node(node, np) {
/*
* It is DPCM
* if it has many CPUs,
- * or has convert-xxx property
+ * or it has convert-xxx property
+ * or it has force-dpcm property
*/
if (dpcm_selectable &&
- (num > 2 ||
+ (num > 2 || force_dpcm ||
adata.convert_rate || adata.convert_channels))
ret = func_dpcm(priv, np, codec, li, is_top);
/* else normal sound */
--
2.17.1
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