ASoC: simple-card: Fix up checks for HW param fixups

The "convert-xxx" properties only have an effect for DPCM DAI links.
A DAI link is only created as DPCM if the device tree requires it;
part of this involves checking for the use of "convert-xxx" properties.

When the convert-sample-format property was added, the checks got out
of sync. A DAI link that specified only convert-sample-format but did
not pass any of the other DPCM checks would not go into DPCM mode and
the convert-sample-format property would be silently ignored.

Fix this by adding a function to do the "convert-xxx" property checks,
instead of open-coding it in simple-card and audio-graph-card. And add
"convert-sample-format" to the check function so that DAI links using
it will be initialized correctly.

Fixes: 047a05366f ("ASoC: simple-card-utils: Fixup DAI sample format")
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Acked-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/20221019012302.633830-1-aidanmacdonald.0x0@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/simple_card_utils.h

@@ -177,6 +177,7 @@ void asoc_simple_convert_fixup(struct asoc_simple_data *data,
 				      struct snd_pcm_hw_params *params);
 void asoc_simple_parse_convert(struct device_node *np, char *prefix,
 			       struct asoc_simple_data *data);
+bool asoc_simple_is_convert_required(const struct asoc_simple_data *data);
 
 int asoc_simple_parse_routing(struct snd_soc_card *card,
 				      char *prefix);

sound/soc/generic/audio-graph-card.c

@@ -417,7 +417,7 @@ static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
 	 * or has convert-xxx property
 	 */
 	if ((of_get_child_count(codec_port) > 1) ||
-	    (adata->convert_rate || adata->convert_channels))
+	    asoc_simple_is_convert_required(adata))
 		return true;
 
 	return false;

sound/soc/generic/simple-card-utils.c

@@ -85,6 +85,21 @@ void asoc_simple_parse_convert(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
 
+/**
+ * asoc_simple_is_convert_required() - Query if HW param conversion was requested
+ * @data: Link data.
+ *
+ * Returns true if any HW param conversion was requested for this DAI link with
+ * any "convert-xxx" properties.
+ */
+bool asoc_simple_is_convert_required(const struct asoc_simple_data *data)
+{
+	return data->convert_rate ||
+	       data->convert_channels ||
+	       data->convert_sample_format;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_is_convert_required);
+
 int asoc_simple_parse_daifmt(struct device *dev,
 			     struct device_node *node,
 			     struct device_node *codec,

sound/soc/generic/simple-card.c

@@ -393,8 +393,7 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
 			 * or has convert-xxx property
 			 */
 			if (dpcm_selectable &&
-			    (num > 2 ||
-			     adata.convert_rate || adata.convert_channels)) {
+			    (num > 2 || asoc_simple_is_convert_required(&adata))) {
 				/*
 				 * np
 				 *	 |1(CPU)|0(Codec)  li->cpu