--- zzzz-none-000/linux-3.10.107/sound/soc/soc-cache.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/soc/soc-cache.c	2021-02-04 17:41:59.000000000 +0000
@@ -11,330 +11,43 @@
  *  option) any later version.
  */
 
-#include <linux/i2c.h>
-#include <linux/spi/spi.h>
 #include <sound/soc.h>
-#include <linux/bitmap.h>
-#include <linux/rbtree.h>
 #include <linux/export.h>
+#include <linux/slab.h>
 
-#include <trace/events/asoc.h>
-
-static bool snd_soc_set_cache_val(void *base, unsigned int idx,
-				  unsigned int val, unsigned int word_size)
-{
-	switch (word_size) {
-	case 1: {
-		u8 *cache = base;
-		if (cache[idx] == val)
-			return true;
-		cache[idx] = val;
-		break;
-	}
-	case 2: {
-		u16 *cache = base;
-		if (cache[idx] == val)
-			return true;
-		cache[idx] = val;
-		break;
-	}
-	default:
-		BUG();
-	}
-	return false;
-}
-
-static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
-		unsigned int word_size)
-{
-	if (!base)
-		return -1;
-
-	switch (word_size) {
-	case 1: {
-		const u8 *cache = base;
-		return cache[idx];
-	}
-	case 2: {
-		const u16 *cache = base;
-		return cache[idx];
-	}
-	default:
-		BUG();
-	}
-	/* unreachable */
-	return -1;
-}
-
-static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
-{
-	int i;
-	int ret;
-	const struct snd_soc_codec_driver *codec_drv;
-	unsigned int val;
-
-	codec_drv = codec->driver;
-	for (i = 0; i < codec_drv->reg_cache_size; ++i) {
-		ret = snd_soc_cache_read(codec, i, &val);
-		if (ret)
-			return ret;
-		if (codec->reg_def_copy)
-			if (snd_soc_get_cache_val(codec->reg_def_copy,
-						  i, codec_drv->reg_word_size) == val)
-				continue;
-
-		WARN_ON(!snd_soc_codec_writable_register(codec, i));
-
-		ret = snd_soc_write(codec, i, val);
-		if (ret)
-			return ret;
-		dev_dbg(codec->dev, "ASoC: Synced register %#x, value = %#x\n",
-			i, val);
-	}
-	return 0;
-}
-
-static int snd_soc_flat_cache_write(struct snd_soc_codec *codec,
-				    unsigned int reg, unsigned int value)
+int snd_soc_cache_init(struct snd_soc_codec *codec)
 {
-	snd_soc_set_cache_val(codec->reg_cache, reg, value,
-			      codec->driver->reg_word_size);
-	return 0;
-}
+	const struct snd_soc_codec_driver *codec_drv = codec->driver;
+	size_t reg_size;
 
-static int snd_soc_flat_cache_read(struct snd_soc_codec *codec,
-				   unsigned int reg, unsigned int *value)
-{
-	*value = snd_soc_get_cache_val(codec->reg_cache, reg,
-				       codec->driver->reg_word_size);
-	return 0;
-}
+	reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
 
-static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
-{
-	if (!codec->reg_cache)
+	if (!reg_size)
 		return 0;
-	kfree(codec->reg_cache);
-	codec->reg_cache = NULL;
-	return 0;
-}
 
-static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
-{
-	if (codec->reg_def_copy)
-		codec->reg_cache = kmemdup(codec->reg_def_copy,
-					   codec->reg_size, GFP_KERNEL);
+	dev_dbg(codec->dev, "ASoC: Initializing cache for %s codec\n",
+				codec->component.name);
+
+	if (codec_drv->reg_cache_default)
+		codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
+					   reg_size, GFP_KERNEL);
 	else
-		codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL);
+		codec->reg_cache = kzalloc(reg_size, GFP_KERNEL);
 	if (!codec->reg_cache)
 		return -ENOMEM;
 
 	return 0;
 }
 
-/* an array of all supported compression types */
-static const struct snd_soc_cache_ops cache_types[] = {
-	/* Flat *must* be the first entry for fallback */
-	{
-		.id = SND_SOC_FLAT_COMPRESSION,
-		.name = "flat",
-		.init = snd_soc_flat_cache_init,
-		.exit = snd_soc_flat_cache_exit,
-		.read = snd_soc_flat_cache_read,
-		.write = snd_soc_flat_cache_write,
-		.sync = snd_soc_flat_cache_sync
-	},
-};
-
-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->compress_type)
-			break;
-
-	/* Fall back to flat compression */
-	if (i == ARRAY_SIZE(cache_types)) {
-		dev_warn(codec->dev, "ASoC: Could not match compress type: %d\n",
-			 codec->compress_type);
-		i = 0;
-	}
-
-	mutex_init(&codec->cache_rw_mutex);
-	codec->cache_ops = &cache_types[i];
-
-	if (codec->cache_ops->init) {
-		if (codec->cache_ops->name)
-			dev_dbg(codec->dev, "ASoC: Initializing %s cache for %s codec\n",
-				codec->cache_ops->name, codec->name);
-		return codec->cache_ops->init(codec);
-	}
-	return -ENOSYS;
-}
-
 /*
  * NOTE: keep in mind that this function might be called
  * multiple times.
  */
 int snd_soc_cache_exit(struct snd_soc_codec *codec)
 {
-	if (codec->cache_ops && codec->cache_ops->exit) {
-		if (codec->cache_ops->name)
-			dev_dbg(codec->dev, "ASoC: Destroying %s cache for %s codec\n",
-				codec->cache_ops->name, codec->name);
-		return codec->cache_ops->exit(codec);
-	}
-	return -ENOSYS;
-}
-
-/**
- * snd_soc_cache_read: Fetch the value of a given register from the cache.
- *
- * @codec: CODEC to configure.
- * @reg: The register index.
- * @value: The value to be returned.
- */
-int snd_soc_cache_read(struct snd_soc_codec *codec,
-		       unsigned int reg, unsigned int *value)
-{
-	int ret;
-
-	mutex_lock(&codec->cache_rw_mutex);
-
-	if (value && codec->cache_ops && codec->cache_ops->read) {
-		ret = codec->cache_ops->read(codec, reg, value);
-		mutex_unlock(&codec->cache_rw_mutex);
-		return ret;
-	}
-
-	mutex_unlock(&codec->cache_rw_mutex);
-	return -ENOSYS;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_read);
-
-/**
- * snd_soc_cache_write: Set the value of a given register in the cache.
- *
- * @codec: CODEC to configure.
- * @reg: The register index.
- * @value: The new register value.
- */
-int snd_soc_cache_write(struct snd_soc_codec *codec,
-			unsigned int reg, unsigned int value)
-{
-	int ret;
-
-	mutex_lock(&codec->cache_rw_mutex);
-
-	if (codec->cache_ops && codec->cache_ops->write) {
-		ret = codec->cache_ops->write(codec, reg, value);
-		mutex_unlock(&codec->cache_rw_mutex);
-		return ret;
-	}
-
-	mutex_unlock(&codec->cache_rw_mutex);
-	return -ENOSYS;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_write);
-
-/**
- * snd_soc_cache_sync: Sync the register cache with the hardware.
- *
- * @codec: CODEC to configure.
- *
- * Any registers that should not be synced should be marked as
- * volatile.  In general drivers can choose not to use the provided
- * syncing functionality if they so require.
- */
-int snd_soc_cache_sync(struct snd_soc_codec *codec)
-{
-	int ret;
-	const char *name;
-
-	if (!codec->cache_sync) {
-		return 0;
-	}
-
-	if (!codec->cache_ops || !codec->cache_ops->sync)
-		return -ENOSYS;
-
-	if (codec->cache_ops->name)
-		name = codec->cache_ops->name;
-	else
-		name = "unknown";
-
-	if (codec->cache_ops->name)
-		dev_dbg(codec->dev, "ASoC: Syncing %s cache for %s codec\n",
-			codec->cache_ops->name, codec->name);
-	trace_snd_soc_cache_sync(codec, name, "start");
-	ret = codec->cache_ops->sync(codec);
-	if (!ret)
-		codec->cache_sync = 0;
-	trace_snd_soc_cache_sync(codec, name, "end");
-	return ret;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_sync);
-
-static int snd_soc_get_reg_access_index(struct snd_soc_codec *codec,
-					unsigned int reg)
-{
-	const struct snd_soc_codec_driver *codec_drv;
-	unsigned int min, max, index;
-
-	codec_drv = codec->driver;
-	min = 0;
-	max = codec_drv->reg_access_size - 1;
-	do {
-		index = (min + max) / 2;
-		if (codec_drv->reg_access_default[index].reg == reg)
-			return index;
-		if (codec_drv->reg_access_default[index].reg < reg)
-			min = index + 1;
-		else
-			max = index;
-	} while (min <= max);
-	return -1;
-}
-
-int snd_soc_default_volatile_register(struct snd_soc_codec *codec,
-				      unsigned int reg)
-{
-	int index;
-
-	if (reg >= codec->driver->reg_cache_size)
-		return 1;
-	index = snd_soc_get_reg_access_index(codec, reg);
-	if (index < 0)
-		return 0;
-	return codec->driver->reg_access_default[index].vol;
-}
-EXPORT_SYMBOL_GPL(snd_soc_default_volatile_register);
-
-int snd_soc_default_readable_register(struct snd_soc_codec *codec,
-				      unsigned int reg)
-{
-	int index;
-
-	if (reg >= codec->driver->reg_cache_size)
-		return 1;
-	index = snd_soc_get_reg_access_index(codec, reg);
-	if (index < 0)
-		return 0;
-	return codec->driver->reg_access_default[index].read;
-}
-EXPORT_SYMBOL_GPL(snd_soc_default_readable_register);
-
-int snd_soc_default_writable_register(struct snd_soc_codec *codec,
-				      unsigned int reg)
-{
-	int index;
-
-	if (reg >= codec->driver->reg_cache_size)
-		return 1;
-	index = snd_soc_get_reg_access_index(codec, reg);
-	if (index < 0)
-		return 0;
-	return codec->driver->reg_access_default[index].write;
+	dev_dbg(codec->dev, "ASoC: Destroying cache for %s codec\n",
+			codec->component.name);
+	kfree(codec->reg_cache);
+	codec->reg_cache = NULL;
+	return 0;
 }
-EXPORT_SYMBOL_GPL(snd_soc_default_writable_register);