ASoC: Add compress_type as a member to snd_soc_codec

We need to keep a copy of the compress_type supplied by the codec driver
so that we can override it if necessary with whatever the machine driver
has provided us with.  The reason for not modifying the codec->driver
struct directly is that ideally we'd like to keep it const.

Adjust the code in soc-cache and soc-core to make use of the compress_type
member in the snd_soc_codec struct.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc.h

@@ -460,6 +460,7 @@ struct snd_soc_codec {
 	struct list_head list;
 	struct list_head card_list;
 	int num_dai;
+	enum snd_soc_compress_type compress_type;
 
 	/* runtime */
 	struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */

sound/soc/soc-cache.c

@@ -1550,11 +1550,11 @@ int snd_soc_cache_init(struct snd_soc_codec *codec)
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(cache_types); ++i)
-		if (cache_types[i].id == codec->driver->compress_type)
+		if (cache_types[i].id == codec->compress_type)
 			break;
 	if (i == ARRAY_SIZE(cache_types)) {
 		dev_err(codec->dev, "Could not match compress type: %d\n",
-			codec->driver->compress_type);
+			codec->compress_type);
 		return -EINVAL;
 	}
 

sound/soc/soc-core.c

@@ -3450,6 +3450,11 @@ int snd_soc_register_codec(struct device *dev,
 		return -ENOMEM;
 	}
 
+	if (codec_drv->compress_type)
+		codec->compress_type = codec_drv->compress_type;
+	else
+		codec->compress_type = SND_SOC_FLAT_COMPRESSION;
+
 	INIT_LIST_HEAD(&codec->dapm.widgets);
 	INIT_LIST_HEAD(&codec->dapm.paths);
 	codec->write = codec_drv->write;