The audio-graph driver supports both normal and DPCM DAI links. The
sound cards requiring DPCM DAI link support, use DPCM_SELECTABLE flag
and DAI links are treated as DPCM links depending on the number of
child nodes in a given DAI link.
There is another requirement where multiple ASoC components need to
be connected together in a chained fashion in a component model. This
patch sets 'component_chaining' flag for such sound cards where FE<->BE
and multiple BE<->BE component connections are required. Hence support
for such sound cards is added under 'audio-graph-cc-card' compatible.
All DAI links under this are treated as DPCM links.
Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
---
sound/soc/generic/audio-graph-card.c | 32 +++++++++++++++++++++++++-------
1 file changed, 25 insertions(+), 7 deletions(-)
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 93bddf6..4a0a345 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -20,10 +20,13 @@
#include <linux/string.h>
#include <sound/simple_card_utils.h>
-#define DPCM_SELECTABLE 1
-
#define PREFIX "audio-graph-card,"
+struct asoc_simple_soc_data {
+ unsigned int dpcm_selectable:1;
+ unsigned int component_chaining:1;
+};
+
static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
@@ -447,7 +450,7 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
struct device_node *codec_port;
struct device_node *codec_port_old = NULL;
struct asoc_simple_data adata;
- uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
+ const struct asoc_simple_soc_data *data = of_device_get_match_data(dev);
int rc, ret;
/* loop for all listed CPU port */
@@ -474,10 +477,12 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
* It is DPCM
* if Codec port has many endpoints,
* or has convert-xxx property
+ * or component chaining is used
*/
- if (dpcm_selectable &&
+ if (data && data->dpcm_selectable &&
((of_get_child_count(codec_port) > 1) ||
- adata.convert_rate || adata.convert_channels))
+ adata.convert_rate || adata.convert_channels ||
+ data->component_chaining))
ret = func_dpcm(priv, cpu_ep, codec_ep, li,
(codec_port_old == codec_port));
/* else normal sound */
@@ -650,6 +655,7 @@ static int graph_probe(struct platform_device *pdev)
{
struct asoc_simple_priv *priv;
struct device *dev = &pdev->dev;
+ const struct asoc_simple_soc_data *data = of_device_get_match_data(dev);
struct snd_soc_card *card;
struct link_info li;
int ret;
@@ -666,6 +672,9 @@ static int graph_probe(struct platform_device *pdev)
card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets);
card->probe = graph_card_probe;
+ if (data)
+ card->component_chaining = data->component_chaining;
+
memset(&li, 0, sizeof(li));
graph_get_dais_count(priv, &li);
if (!li.link || !li.dais)
@@ -711,10 +720,19 @@ static int graph_remove(struct platform_device *pdev)
return asoc_simple_clean_reference(card);
}
+static const struct asoc_simple_soc_data scu_card_data = {
+ .dpcm_selectable = 1,
+};
+
+static const struct asoc_simple_soc_data cc_card_data = {
+ .dpcm_selectable = 1,
+ .component_chaining = 1,
+};
+
static const struct of_device_id graph_of_match[] = {
{ .compatible = "audio-graph-card", },
- { .compatible = "audio-graph-scu-card",
- .data = (void *)DPCM_SELECTABLE },
+ { .compatible = "audio-graph-scu-card", .data = &scu_card_data, },
+ { .compatible = "audio-graph-cc-card", .data = &cc_card_data, },
{},
};
MODULE_DEVICE_TABLE(of, graph_of_match);
--
2.7.4
