ASoC: simple-card: don't select DPCM via simple-audio-card

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.

Fixes: da215354eb55c ("ASoC: simple-card: merge simple-scu-card")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 3 deletions

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 7147bba45a2a..34de32efc4c4 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);