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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-01 21:48:03 +0300
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-04 13:40:45 +0300
commita3032b47c46920ed3f2fd58e64f484e3dab49f23 (patch)
treecdc6099c15a31c6fa2bae26e38da7fde7a1a3aa1
parent8c961bcca1d10be4f2c06375eb561679167653a0 (diff)
downloadlinux-a3032b47c46920ed3f2fd58e64f484e3dab49f23.tar.xz
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: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
-rw-r--r--include/sound/soc.h1
-rw-r--r--sound/soc/soc-cache.c20
2 files changed, 16 insertions, 5 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4e8f14bc8ed3..e6a6d10de1d3 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -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;
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 84b6916db87d..5869dc3be781 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -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)