[alsa-devel] [PATCH 0/3] ad1836/ad1938: PM and typo fix/cleanup
Hi Mark, The following 3 patches fix/cleanup PM and typo of ad1836/ad1938 codec driver:
1. ad1836: reset and restore clock control mode in suspend/resume entry 2. ad1938: fix typo, rename mask to rx_mask for ad1938_set_tdm_slot 3. ad1938:let soc-core dapm handle PLL power
As I will send patches special for moving to soc-cache, in patch 1, I still use the old way to read/write codec registers.
Thanks Barry
Tests show frequent suspend/resume(frequent poweroff/on ad1836 internal components) maybe make ad1836 clock mode wrong sometimes after wakeup. This patch reset/restore ad1836 clock mode while executing PM, then ad1836 can always resume to right clock status.
Signed-off-by: Barry Song 21cnbao@gmail.com --- sound/soc/codecs/ad1836.c | 32 ++++++++++++++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/ad1836.c b/sound/soc/codecs/ad1836.c index 2c18e3d..83add2f 100644 --- a/sound/soc/codecs/ad1836.c +++ b/sound/soc/codecs/ad1836.c @@ -223,6 +223,36 @@ static unsigned int ad1836_read_reg_cache(struct snd_soc_codec *codec, return reg_cache[reg]; }
+#ifdef CONFIG_PM +static int ad1836_soc_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + /* reset clock control mode */ + u16 adc_ctrl2 = codec->read(codec, AD1836_ADC_CTRL2); + adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK; + + return codec->write(codec, AD1836_ADC_CTRL2, adc_ctrl2); +} + +static int ad1836_soc_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + /* restore clock control mode */ + u16 adc_ctrl2 = codec->read(codec, AD1836_ADC_CTRL2); + adc_ctrl2 |= AD1836_ADC_AUX; + + return codec->write(codec, AD1836_ADC_CTRL2, adc_ctrl2); +} +#else +#define ad1836_soc_suspend NULL +#define ad1836_soc_resume NULL +#endif + static int __devinit ad1836_spi_probe(struct spi_device *spi) { struct snd_soc_codec *codec; @@ -404,6 +434,8 @@ static int ad1836_remove(struct platform_device *pdev) struct snd_soc_codec_device soc_codec_dev_ad1836 = { .probe = ad1836_probe, .remove = ad1836_remove, + .suspend = ad1836_soc_suspend, + .resume = ad1836_soc_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836);
Signed-off-by: Barry Song 21cnbao@gmail.com --- sound/soc/codecs/ad1938.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/sound/soc/codecs/ad1938.c b/sound/soc/codecs/ad1938.c index 5d48918..735c356 100644 --- a/sound/soc/codecs/ad1938.c +++ b/sound/soc/codecs/ad1938.c @@ -145,7 +145,7 @@ static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd) }
static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, - unsigned int mask, int slots, int width) + unsigned int rx_mask, int slots, int width) { struct snd_soc_codec *codec = dai->codec; int dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
PM architecture of ad1938 is simple, we don't need a bundle of functions like ad1938_pll_powerctrl, ad1938_set_bias_level for only PLL. A dapm supply will handle on/off of PLL. Since soc-core can poweron/off PLL on-demand, we don't need to poweron/off PLL in suspend/resume entries too.
Signed-off-by: Barry Song 21cnbao@gmail.com --- sound/soc/codecs/ad1938.c | 62 ++------------------------------------------ 1 files changed, 3 insertions(+), 59 deletions(-)
diff --git a/sound/soc/codecs/ad1938.c b/sound/soc/codecs/ad1938.c index 735c356..47d9ac0 100644 --- a/sound/soc/codecs/ad1938.c +++ b/sound/soc/codecs/ad1938.c @@ -97,6 +97,7 @@ static const struct snd_kcontrol_new ad1938_snd_controls[] = { static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1), SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_SUPPLY("PLL_PWR", AD1938_PLL_CLK_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_OUTPUT("DAC1OUT"), SND_SOC_DAPM_OUTPUT("DAC2OUT"), @@ -107,6 +108,8 @@ static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = { };
static const struct snd_soc_dapm_route audio_paths[] = { + { "DAC", NULL, "PLL_PWR" }, + { "ADC", NULL, "PLL_PWR" }, { "DAC", NULL, "ADC_PWR" }, { "ADC", NULL, "ADC_PWR" }, { "DAC1OUT", "DAC1 Switch", "DAC" }, @@ -134,16 +137,6 @@ static int ad1938_mute(struct snd_soc_dai *dai, int mute) return 0; }
-static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd) -{ - int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0); - reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg | - AD1938_PLL_POWERDOWN; - codec->write(codec, AD1938_PLL_CLK_CTRL0, reg); - - return 0; -} - static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int width) { @@ -306,24 +299,6 @@ static int ad1938_hw_params(struct snd_pcm_substream *substream, return 0; }
-static int ad1938_set_bias_level(struct snd_soc_codec *codec, - enum snd_soc_bias_level level) -{ - switch (level) { - case SND_SOC_BIAS_ON: - ad1938_pll_powerctrl(codec, 1); - break; - case SND_SOC_BIAS_PREPARE: - break; - case SND_SOC_BIAS_STANDBY: - case SND_SOC_BIAS_OFF: - ad1938_pll_powerctrl(codec, 0); - break; - } - codec->bias_level = level; - return 0; -} - /* * interface to read/write ad1938 register */ @@ -514,7 +489,6 @@ static int ad1938_register(struct ad1938_priv *ad1938) codec->num_dai = 1; codec->write = ad1938_write_reg; codec->read = ad1938_read_reg_cache; - codec->set_bias_level = ad1938_set_bias_level; INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths);
@@ -559,7 +533,6 @@ static int ad1938_register(struct ad1938_priv *ad1938)
static void ad1938_unregister(struct ad1938_priv *ad1938) { - ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&ad1938_dai); snd_soc_unregister_codec(&ad1938->codec); kfree(ad1938); @@ -593,7 +566,6 @@ static int ad1938_probe(struct platform_device *pdev) ARRAY_SIZE(ad1938_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
- ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
pcm_err: return ret; @@ -610,37 +582,9 @@ static int ad1938_remove(struct platform_device *pdev) return 0; }
-#ifdef CONFIG_PM -static int ad1938_suspend(struct platform_device *pdev, - pm_message_t state) -{ - struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_codec *codec = socdev->card->codec; - - ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF); - return 0; -} - -static int ad1938_resume(struct platform_device *pdev) -{ - struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_codec *codec = socdev->card->codec; - - if (codec->suspend_bias_level == SND_SOC_BIAS_ON) - ad1938_set_bias_level(codec, SND_SOC_BIAS_ON); - - return 0; -} -#else -#define ad1938_suspend NULL -#define ad1938_resume NULL -#endif - struct snd_soc_codec_device soc_codec_dev_ad1938 = { .probe = ad1938_probe, .remove = ad1938_remove, - .suspend = ad1938_suspend, - .resume = ad1938_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938);
On Fri, Dec 25, 2009 at 02:10:06PM +0800, Barry Song wrote:
Tests show frequent suspend/resume(frequent poweroff/on ad1836 internal components) maybe make ad1836 clock mode wrong sometimes after wakeup. This patch reset/restore ad1836 clock mode while executing PM, then ad1836 can always resume to right clock status.
Signed-off-by: Barry Song 21cnbao@gmail.com
Applied all three, thanks.
participants (2)
-
Barry Song -
Mark Brown