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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>
This commit is contained in:
Mark Brown 2010-02-01 18:48:03 +00:00
parent 8c961bcca1
commit a3032b47c4
2 changed files with 16 additions and 5 deletions
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1
include/sound/soc.h
View File

@ -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;

20
sound/soc/soc-cache.c
View File

@ -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)