From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
commit da215354eb55c ("ASoC: simple-card: merge simple-scu-card")
merged simple-scu-audio-card which can handle DPCM into
simple-audio-card.
By this patch, the judgement to select "normal sound card" or
"DPCM sound card" is based on its CPU/Codec DAI count.
But, because of it, existing "simple-audio-card" user who is
assuming "normal sound card" might select DPCM unintentionally.
To solve this issue, this patch allows "simple-audio-card" user
can select "normal sound card", and "simple-scu-audio-card" user
can select both "normal sound card" and "DPCM sound card".
This keeps compatibility collectry.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
sound/soc/generic/simple-card.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 7147bba..34de32e 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -9,12 +9,15 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>
+#define DPCM_SELECTABLE 1
+
struct simple_priv {
struct snd_soc_card snd_card;
struct simple_dai_props {
@@ -441,6 +444,7 @@ static int simple_for_each_link(struct simple_priv *priv,
struct device *dev = simple_priv_to_dev(priv);
struct device_node *top = dev->of_node;
struct device_node *node;
+ uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
bool is_top = 0;
int ret = 0;
@@ -480,8 +484,9 @@ static int simple_for_each_link(struct simple_priv *priv,
* if it has many CPUs,
* or has convert-xxx property
*/
- if (num > 2 ||
- adata.convert_rate || adata.convert_channels)
+ if (dpcm_selectable &&
+ (num > 2 ||
+ adata.convert_rate || adata.convert_channels))
ret = func_dpcm(priv, np, codec, li, is_top);
/* else normal sound */
else
@@ -822,7 +827,8 @@ static int simple_remove(struct platform_device *pdev)
static const struct of_device_id simple_of_match[] = {
{ .compatible = "simple-audio-card", },
- { .compatible = "simple-scu-audio-card", },
+ { .compatible = "simple-scu-audio-card",
+ .data = (void *)DPCM_SELECTABLE },
{},
};
MODULE_DEVICE_TABLE(of, simple_of_match);
--
2.7.4
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