Disable some codec modules in standby mode, completely disable codec in off mode to save some power. Fix suspend/resume: mark mixer regs as dirty on resume to restore mixer values, otherwise driver produces no sound (master is muted by default).
Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com --- sound/soc/codecs/uda1380.c | 140 +++++++++++++++++++++++++++++++------------- 1 files changed, 99 insertions(+), 41 deletions(-)
diff --git a/sound/soc/codecs/uda1380.c b/sound/soc/codecs/uda1380.c index 1a51c81..8646cb3 100644 --- a/sound/soc/codecs/uda1380.c +++ b/sound/soc/codecs/uda1380.c @@ -39,6 +39,7 @@ struct uda1380_priv { u16 reg_cache[UDA1380_CACHEREGNUM]; unsigned int dac_clk; struct work_struct work; + void *control_data; };
/* @@ -129,7 +130,46 @@ static int uda1380_write(struct snd_soc_codec *codec, unsigned int reg, return -EIO; }
-#define uda1380_reset(c) uda1380_write(c, UDA1380_RESET, 0) +static void uda1380_sync_cache(struct snd_soc_codec *codec) +{ + int reg; + u8 data[3]; + u16 *cache = codec->reg_cache; + + /* Sync reg_cache with the hardware */ + for (reg = 0; reg < UDA1380_MVOL; reg++) { + data[0] = reg; + data[1] = (cache[reg] & 0xff00) >> 8; + data[2] = cache[reg] & 0x00ff; + if (codec->hw_write(codec->control_data, data, 3) != 3) + dev_err(codec->dev, "%s: write to reg 0x%x failed\n", + __func__, reg); + } +} + +static int uda1380_reset(struct snd_soc_codec *codec) +{ + struct uda1380_platform_data *pdata = codec->dev->platform_data; + + if (pdata->gpio_reset != -EINVAL) { + gpio_set_value(pdata->gpio_reset, 1); + mdelay(1); + gpio_set_value(pdata->gpio_reset, 0); + } else { + u8 data[3]; + + data[0] = UDA1380_RESET; + data[1] = 0; + data[2] = 0; + + if (codec->hw_write(codec->control_data, data, 3) != 3) { + dev_err(codec->dev, "%s: failed\n", __func__); + return -EIO; + } + } + + return 0; +}
static void uda1380_flush_work(struct work_struct *work) { @@ -145,7 +185,6 @@ static void uda1380_flush_work(struct work_struct *work) uda1380_read_reg_cache(uda1380_codec, reg)); clear_bit(bit, &uda1380_cache_dirty); } - }
/* declarations of ALSA reg_elem_REAL controls */ @@ -560,18 +599,40 @@ static int uda1380_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { int pm = uda1380_read_reg_cache(codec, UDA1380_PM); + struct uda1380_platform_data *pdata = codec->dev->platform_data; + + if (codec->bias_level == level) + return 0;
switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: + /* ADC, DAC on */ uda1380_write(codec, UDA1380_PM, R02_PON_BIAS | pm); break; case SND_SOC_BIAS_STANDBY: - uda1380_write(codec, UDA1380_PM, R02_PON_BIAS); - break; - case SND_SOC_BIAS_OFF: + if (codec->bias_level == SND_SOC_BIAS_OFF) { + if (pdata->gpio_power != -EINVAL) { + gpio_set_value(pdata->gpio_power, 1); + uda1380_reset(codec); + } + + uda1380_sync_cache(codec); + } uda1380_write(codec, UDA1380_PM, 0x0); break; + case SND_SOC_BIAS_OFF: + if (pdata->gpio_power != -EINVAL) { + int reg; + gpio_set_value(pdata->gpio_power, 0); + + /* Mark mixer regs cache dirty to sync them with + * codec regs on power on. + */ + for (reg = UDA1380_MVOL; reg < UDA1380_CACHEREGNUM; + reg++) + set_bit(reg - 0x10, &uda1380_cache_dirty); + } } codec->bias_level = level; return 0; @@ -651,16 +712,6 @@ static int uda1380_suspend(struct snd_soc_codec *codec, pm_message_t state)
static int uda1380_resume(struct snd_soc_codec *codec) { - int i; - u8 data[2]; - u16 *cache = codec->reg_cache; - - /* Sync reg_cache with the hardware */ - for (i = 0; i < ARRAY_SIZE(uda1380_reg); i++) { - data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); - data[1] = cache[i] & 0x00ff; - codec->hw_write(codec->control_data, data, 2); - } uda1380_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return 0; } @@ -671,29 +722,32 @@ static int uda1380_probe(struct snd_soc_codec *codec) struct uda1380_priv *uda1380 = snd_soc_codec_get_drvdata(codec); int ret;
+ uda1380->codec = codec; + codec->hw_write = (hw_write_t)i2c_master_send; + codec->control_data = uda1380->control_data;
- if (!pdata || !pdata->gpio_power || !pdata->gpio_reset) + if (!pdata) return -EINVAL;
- ret = gpio_request(pdata->gpio_power, "uda1380 power"); - if (ret) - return ret; - ret = gpio_request(pdata->gpio_reset, "uda1380 reset"); - if (ret) - goto err_gpio; - - gpio_direction_output(pdata->gpio_power, 1); - - /* we may need to have the clock running here - pH5 */ - gpio_direction_output(pdata->gpio_reset, 1); - udelay(5); - gpio_set_value(pdata->gpio_reset, 0); + if (pdata->gpio_reset != -EINVAL) { + ret = gpio_request(pdata->gpio_reset, "uda1380 reset"); + if (ret) + goto err_out; + gpio_direction_output(pdata->gpio_reset, 0); + }
- ret = uda1380_reset(codec); - if (ret < 0) { - dev_err(codec->dev, "Failed to issue reset\n"); - goto err_reset; + if (pdata->gpio_power != -EINVAL) { + ret = gpio_request(pdata->gpio_power, "uda1380 power"); + if (ret) + goto err_gpio; + gpio_direction_output(pdata->gpio_power, 0); + } else { + ret = uda1380_reset(codec); + if (ret) { + dev_err(codec->dev, "Failed to issue reset\n"); + goto err_reset; + } }
INIT_WORK(&uda1380->work, uda1380_flush_work); @@ -703,10 +757,11 @@ static int uda1380_probe(struct snd_soc_codec *codec) /* set clock input */ switch (pdata->dac_clk) { case UDA1380_DAC_CLK_SYSCLK: - uda1380_write(codec, UDA1380_CLK, 0); + uda1380_write_reg_cache(codec, UDA1380_CLK, 0); break; case UDA1380_DAC_CLK_WSPLL: - uda1380_write(codec, UDA1380_CLK, R00_DAC_CLK); + uda1380_write_reg_cache(codec, UDA1380_CLK, + R00_DAC_CLK); break; }
@@ -717,10 +772,12 @@ static int uda1380_probe(struct snd_soc_codec *codec) return 0;
err_reset: - gpio_set_value(pdata->gpio_power, 0); - gpio_free(pdata->gpio_reset); + if (pdata->gpio_reset != -EINVAL) + gpio_free(pdata->gpio_reset); err_gpio: - gpio_free(pdata->gpio_power); + if (pdata->gpio_power != -EINVAL) + gpio_free(pdata->gpio_power); +err_out: return ret; }
@@ -731,7 +788,6 @@ static int uda1380_remove(struct snd_soc_codec *codec)
uda1380_set_bias_level(codec, SND_SOC_BIAS_OFF);
- gpio_set_value(pdata->gpio_power, 0); gpio_free(pdata->gpio_reset); gpio_free(pdata->gpio_power);
@@ -743,8 +799,8 @@ static struct snd_soc_codec_driver soc_codec_dev_uda1380 = { .remove = uda1380_remove, .suspend = uda1380_suspend, .resume = uda1380_resume, - .read = uda1380_read_reg_cache, - .write = uda1380_write, + .read = uda1380_read_reg_cache, + .write = uda1380_write, .set_bias_level = uda1380_set_bias_level, .reg_cache_size = ARRAY_SIZE(uda1380_reg), .reg_word_size = sizeof(u16), @@ -764,11 +820,13 @@ static __devinit int uda1380_i2c_probe(struct i2c_client *i2c, return -ENOMEM;
i2c_set_clientdata(i2c, uda1380); + uda1380->control_data = i2c;
ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_uda1380, uda1380_dai, ARRAY_SIZE(uda1380_dai)); if (ret < 0) kfree(uda1380); + return ret; }