Commit dad8e7ae authored by Dimitris Papastamos's avatar Dimitris Papastamos Committed by Mark Brown
Browse files

ASoC: soc-cache: Introduce the cache_bypass option 



This is primarily needed to avoid writing back to the cache
whenever we are syncing the cache with the hardware.  This gives a
performance benefit especially for large register maps.

Signed-off-by: default avatarDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent e66ef2f8

include/sound/soc.h

+1 −0
Original line number Diff line number Diff line
@@ -488,6 +488,7 @@ struct snd_soc_codec { 
	/* runtime */

	struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */

	unsigned int active;

	unsigned int cache_bypass:1; /* Suppress access to the cache */

	unsigned int cache_only:1;  /* Suppress writes to hardware */

	unsigned int cache_sync:1; /* Cache needs to be synced to hardware */

	unsigned int suspended:1; /* Codec is in suspend PM state */

sound/soc/soc-cache.c

+24 −12
Original line number Diff line number Diff line
@@ -25,7 +25,8 @@ static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec, 
	unsigned int val;



	if (reg >= codec->driver->reg_cache_size ||

		snd_soc_codec_volatile_register(codec, reg)) {

		snd_soc_codec_volatile_register(codec, reg) ||

		codec->cache_bypass) {

			if (codec->cache_only)

				return -1;
@@ -49,7 +50,8 @@ static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg, 
	data[1] = value & 0x00ff;



	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;
@@ -106,7 +108,8 @@ static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec, 
	unsigned int val;



	if (reg >= codec->driver->reg_cache_size ||

		snd_soc_codec_volatile_register(codec, reg)) {

		snd_soc_codec_volatile_register(codec, reg) ||

		codec->cache_bypass) {

			if (codec->cache_only)

				return -1;
@@ -130,7 +133,8 @@ static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, 
	data[1] = value & 0x00ff;



	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;
@@ -191,7 +195,8 @@ static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg, 
	data[1] = value & 0xff;



	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;
@@ -216,7 +221,8 @@ static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec, 


	reg &= 0xff;

	if (reg >= codec->driver->reg_cache_size ||

		snd_soc_codec_volatile_register(codec, reg)) {

		snd_soc_codec_volatile_register(codec, reg) ||

		codec->cache_bypass) {

			if (codec->cache_only)

				return -1;
@@ -271,7 +277,8 @@ static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, 
	data[2] = value & 0xff;



	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;
@@ -295,7 +302,8 @@ static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, 
	unsigned int val;



	if (reg >= codec->driver->reg_cache_size ||

	    snd_soc_codec_volatile_register(codec, reg)) {

	    snd_soc_codec_volatile_register(codec, reg) ||

	    codec->cache_bypass) {

		if (codec->cache_only)

			return -1;
@@ -450,7 +458,8 @@ static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec, 


	reg &= 0xff;

	if (reg >= codec->driver->reg_cache_size ||

		snd_soc_codec_volatile_register(codec, reg)) {

		snd_soc_codec_volatile_register(codec, reg) ||

		codec->cache_bypass) {

			if (codec->cache_only)

				return -1;
@@ -476,7 +485,8 @@ static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg, 


	reg &= 0xff;

	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;
@@ -568,7 +578,8 @@ static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec, 
	unsigned int val;



	if (reg >= codec->driver->reg_cache_size ||

	    snd_soc_codec_volatile_register(codec, reg)) {

	    snd_soc_codec_volatile_register(codec, reg) ||

	    codec->cache_bypass) {

		if (codec->cache_only)

			return -1;
@@ -595,7 +606,8 @@ static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg, 
	data[3] = value & 0xff;



	if (!snd_soc_codec_volatile_register(codec, reg) &&

		reg < codec->driver->reg_cache_size) {

		reg < codec->driver->reg_cache_size &&

		!codec->cache_bypass) {

		ret = snd_soc_cache_write(codec, reg, value);

		if (ret < 0)

			return -1;