diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/codecs/tlv320dac33.c | 66 |
1 files changed, 45 insertions, 21 deletions
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c index 50d1522..68b7ccb 100644 --- a/sound/soc/codecs/tlv320dac33.c +++ b/sound/soc/codecs/tlv320dac33.c @@ -61,6 +61,8 @@ #define US_TO_SAMPLES(rate, us) \ (rate / (1000000 / us)) +static void dac33_calculate_times(struct snd_pcm_substream *substream); +static int dac33_prepare_chip(struct snd_pcm_substream *substream); static struct snd_soc_codec *tlv320dac33_codec; @@ -355,9 +357,17 @@ static inline void dac33_soft_power(struct snd_soc_codec *codec, int power) static int dac33_hard_power(struct snd_soc_codec *codec, int power) { struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); - int ret; + int ret = 0; mutex_lock(&dac33->mutex); + + /* Safety check */ + if (unlikely(power == dac33->chip_power)) { + dev_warn(codec->dev, "Trying to set the same power state: %s\n", + power ? "ON" : "OFF"); + goto exit; + } + if (power) { ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies), dac33->supplies); @@ -371,10 +381,6 @@ static int dac33_hard_power(struct snd_soc_codec *codec, int power) gpio_set_value(dac33->power_gpio, 1); dac33->chip_power = 1; - - dac33_init_chip(codec); - - dac33_soft_power(codec, 1); } else { dac33_soft_power(codec, 0); if (dac33->power_gpio >= 0) @@ -396,6 +402,22 @@ exit: return ret; } +static int playback_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec); + + switch (event) { + case SND_SOC_DAPM_PRE_PMU: + if (likely(dac33->substream)) { + dac33_calculate_times(dac33->substream); + dac33_prepare_chip(dac33->substream); + } + break; + } + return 0; +} + static int dac33_get_nsample(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { @@ -525,6 +547,8 @@ static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = { DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0), SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power", DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0), + + SND_SOC_DAPM_PRE("Prepare Playback", playback_event), }; static const struct snd_soc_dapm_route audio_map[] = { @@ -567,18 +591,18 @@ static int dac33_set_bias_level(struct snd_soc_codec *codec, break; case SND_SOC_BIAS_STANDBY: if (codec->bias_level == SND_SOC_BIAS_OFF) { + /* Coming from OFF, switch on the codec */ ret = dac33_hard_power(codec, 1); if (ret != 0) return ret; - } - dac33_soft_power(codec, 0); + dac33_init_chip(codec); + } break; case SND_SOC_BIAS_OFF: ret = dac33_hard_power(codec, 0); if (ret != 0) return ret; - break; } codec->bias_level = level; @@ -829,6 +853,16 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream) } mutex_lock(&dac33->mutex); + + if (!dac33->chip_power) { + /* + * Chip is not powered yet. + * Do the init in the dac33_set_bias_level later. + */ + mutex_unlock(&dac33->mutex); + return 0; + } + dac33_soft_power(codec, 0); dac33_soft_power(codec, 1); @@ -1035,15 +1069,6 @@ static void dac33_calculate_times(struct snd_pcm_substream *substream) } -static int dac33_pcm_prepare(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - dac33_calculate_times(substream); - dac33_prepare_chip(substream); - - return 0; -} - static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { @@ -1336,9 +1361,6 @@ static int dac33_soc_probe(struct platform_device *pdev) dac33_add_widgets(codec); - /* power on device */ - dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY); - return 0; pcm_err: @@ -1375,6 +1397,8 @@ static int dac33_soc_resume(struct platform_device *pdev) struct snd_soc_codec *codec = socdev->card->codec; dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + if (codec->suspend_bias_level == SND_SOC_BIAS_ON) + dac33_set_bias_level(codec, SND_SOC_BIAS_PREPARE); dac33_set_bias_level(codec, codec->suspend_bias_level); return 0; @@ -1396,7 +1420,6 @@ static struct snd_soc_dai_ops dac33_dai_ops = { .startup = dac33_startup, .shutdown = dac33_shutdown, .hw_params = dac33_hw_params, - .prepare = dac33_pcm_prepare, .trigger = dac33_pcm_trigger, .delay = dac33_dai_delay, .set_sysclk = dac33_set_dai_sysclk, @@ -1450,6 +1473,7 @@ static int __devinit dac33_i2c_probe(struct i2c_client *client, codec->hw_write = (hw_write_t) i2c_master_send; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = dac33_set_bias_level; + codec->idle_bias_off = 1; codec->dai = &dac33_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(dac33_reg); |