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authorAdam Thomson <Adam.Thomson.Opensource@diasemi.com>2016-05-10 16:11:04 +0100
committerMark Brown <broonie@kernel.org>2016-05-10 19:24:16 +0100
commita0d5caeaebfd00853efa0080afc850e10be7b39a (patch)
tree499963aa6cd5b74096d16b4ea4f9bece30f07f03 /sound
parentf55532a0c0b8bb6148f4e07853b876ef73bc69ca (diff)
downloadlinux-stericsson-a0d5caeaebfd00853efa0080afc850e10be7b39a.tar.gz
ASoC: da7213: Add DAI DAPM event to control DAI clocks
Currently, when Codec is I2S master DAI clocks are continuously generated even if all audio streams have stopped. To improve efficiency, control of the DAI clocks for master mode have been moved to a DAPM widget event so they're only enabled as required. Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/da7213.c35
-rw-r--r--sound/soc/codecs/da7213.h2
2 files changed, 32 insertions, 5 deletions
diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c
index 7278f93460c1..701bd6204747 100644
--- a/sound/soc/codecs/da7213.c
+++ b/sound/soc/codecs/da7213.c
@@ -726,6 +726,36 @@ static const struct snd_kcontrol_new da7213_dapm_mixoutr_controls[] = {
/*
+ * DAPM Events
+ */
+
+static int da7213_dai_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+ struct da7213_priv *da7213 = snd_soc_codec_get_drvdata(codec);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ /* Enable DAI clks for master mode */
+ if (da7213->master)
+ snd_soc_update_bits(codec, DA7213_DAI_CLK_MODE,
+ DA7213_DAI_CLK_EN_MASK,
+ DA7213_DAI_CLK_EN_MASK);
+ return 0;
+ case SND_SOC_DAPM_POST_PMD:
+ /* Disable DAI clks if in master mode */
+ if (da7213->master)
+ snd_soc_update_bits(codec, DA7213_DAI_CLK_MODE,
+ DA7213_DAI_CLK_EN_MASK, 0);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+
+/*
* DAPM widgets
*/
@@ -736,7 +766,8 @@ static const struct snd_soc_dapm_widget da7213_dapm_widgets[] = {
/* Use a supply here as this controls both input & output DAIs */
SND_SOC_DAPM_SUPPLY("DAI", DA7213_DAI_CTRL, DA7213_DAI_EN_SHIFT,
- DA7213_NO_INVERT, NULL, 0),
+ DA7213_NO_INVERT, da7213_dai_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
/*
* Input
@@ -1143,11 +1174,9 @@ static int da7213_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
/* Set master/slave mode */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
- dai_clk_mode |= DA7213_DAI_CLK_EN_MASTER_MODE;
da7213->master = true;
break;
case SND_SOC_DAIFMT_CBS_CFS:
- dai_clk_mode |= DA7213_DAI_CLK_EN_SLAVE_MODE;
da7213->master = false;
break;
default:
diff --git a/sound/soc/codecs/da7213.h b/sound/soc/codecs/da7213.h
index 030fd691b076..5de5c2997e0c 100644
--- a/sound/soc/codecs/da7213.h
+++ b/sound/soc/codecs/da7213.h
@@ -178,8 +178,6 @@
#define DA7213_DAI_BCLKS_PER_WCLK_MASK (0x3 << 0)
#define DA7213_DAI_CLK_POL_INV (0x1 << 2)
#define DA7213_DAI_WCLK_POL_INV (0x1 << 3)
-#define DA7213_DAI_CLK_EN_SLAVE_MODE (0x0 << 7)
-#define DA7213_DAI_CLK_EN_MASTER_MODE (0x1 << 7)
#define DA7213_DAI_CLK_EN_MASK (0x1 << 7)
/* DA7213_DAI_CTRL = 0x29 */