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Commit a3032b47 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Add a cache_sync bit to the CODEC structure 



Add a bit to the CODEC structure indicating if a cache sync is required.
By default this will be set if a cache only write is done to a soc-cache
register cache.  This allows us to avoid syncing the cache back after
using cache only writes if there were no changes.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 8c961bcc

include/sound/soc.h

+1 −0
Original line number Diff line number Diff line
@@ -424,6 +424,7 @@ struct snd_soc_codec { 


	unsigned int idle_bias_off:1; /* Use BIAS_OFF instead of STANDBY */

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

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



	/* dapm */

	u32 pop_time;

sound/soc/soc-cache.c

+15 −5
Original line number Diff line number Diff line
@@ -39,8 +39,10 @@ static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg, 
	if (reg < codec->reg_cache_size)

		cache[reg] = value;



	if (codec->cache_only)

	if (codec->cache_only) {

		codec->cache_sync = 1;

		return 0;

	}



	ret = codec->hw_write(codec->control_data, data, 2);

	if (ret == 2)
@@ -105,8 +107,10 @@ static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, 
	if (reg < codec->reg_cache_size)

		cache[reg] = value;



	if (codec->cache_only)

	if (codec->cache_only) {

		codec->cache_sync = 1;

		return 0;

	}



	ret = codec->hw_write(codec->control_data, data, 2);

	if (ret == 2)
@@ -161,8 +165,10 @@ static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg, 
	if (reg < codec->reg_cache_size)

		cache[reg] = value;



	if (codec->cache_only)

	if (codec->cache_only) {

		codec->cache_sync = 1;

		return 0;

	}



	if (codec->hw_write(codec->control_data, data, 2) == 2)

		return 0;
@@ -192,8 +198,10 @@ static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, 
	if (!snd_soc_codec_volatile_register(codec, reg))

		reg_cache[reg] = value;



	if (codec->cache_only)

	if (codec->cache_only) {

		codec->cache_sync = 1;

		return 0;

	}



	if (codec->hw_write(codec->control_data, data, 3) == 3)

		return 0;
@@ -313,8 +321,10 @@ static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg, 
	if (reg < codec->reg_cache_size)

		cache[reg] = value;



	if (codec->cache_only)

	if (codec->cache_only) {

		codec->cache_sync = 1;

		return 0;

	}



	ret = codec->hw_write(codec->control_data, data, 3);

	if (ret == 3)