[ALSA] ASoC: Clarify API for bias configuration

Currently the ASoC core configures the bias levels in the system using
a callback on codecs and machines called 'dapm_event', passing it PCI
style power levels as SNDRV_CTL_POWER_ constants. This is more obscure
than it needs to be and has caused confusion to driver authors,
especially given that DAPM is also performing power management.

Address this by renaming the callback function to 'set_bias_level' and
using constants explicitly representing the off, standby, pre-on and on
states which DAPM transitions through.

Also unexport the API for setting bias level: there are currently no
in-tree users of this API other than the core itself and it is likely
that the core would need to be extended to cater for any users.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 14 insertions, 14 deletions

diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index 89efe40c7c33..e26cfcf0b4fc 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -571,23 +571,23 @@ struct snd_soc_codec_dai wm9712_dai[] = {
 };
 EXPORT_SYMBOL_GPL(wm9712_dai);
 
-static int wm9712_dapm_event(struct snd_soc_codec *codec, int event)
+static int wm9712_set_bias_level(struct snd_soc_codec *codec,
+                                 enum snd_soc_bias_level level)
 {
-        switch (event) {
-        case SNDRV_CTL_POWER_D0: /* full On */
-        case SNDRV_CTL_POWER_D1: /* partial On */
-        case SNDRV_CTL_POWER_D2: /* partial On */
+        switch (level) {
+        case SND_SOC_BIAS_ON:
+        case SND_SOC_BIAS_PREPARE:
                 break;
-        case SNDRV_CTL_POWER_D3hot: /* Off, with power */
+        case SND_SOC_BIAS_STANDBY:
                 ac97_write(codec, AC97_POWERDOWN, 0x0000);
                 break;
-        case SNDRV_CTL_POWER_D3cold: /* Off, without power */
+        case SND_SOC_BIAS_OFF:
                 /* disable everything including AC link */
                 ac97_write(codec, AC97_EXTENDED_MSTATUS, 0xffff);
                 ac97_write(codec, AC97_POWERDOWN, 0xffff);
                 break;
         }
-        codec->dapm_state = event;
+        codec->bias_level = level;
         return 0;
 }
 
@@ -615,7 +615,7 @@ static int wm9712_soc_suspend(struct platform_device *pdev,
         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
         struct snd_soc_codec *codec = socdev->codec;
 
-        wm9712_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
+        wm9712_set_bias_level(codec, SND_SOC_BIAS_OFF);
         return 0;
 }
 
@@ -632,7 +632,7 @@ static int wm9712_soc_resume(struct platform_device *pdev)
                 return ret;
         }
 
-        wm9712_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
+        wm9712_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
         if (ret == 0) {
                 /* Sync reg_cache with the hardware after cold reset */
@@ -644,8 +644,8 @@ static int wm9712_soc_resume(struct platform_device *pdev)
                 }
         }
 
-        if (codec->suspend_dapm_state == SNDRV_CTL_POWER_D0)
-                wm9712_dapm_event(codec, SNDRV_CTL_POWER_D0);
+        if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
+                wm9712_set_bias_level(codec, SND_SOC_BIAS_ON);
 
         return ret;
 }
@@ -679,7 +679,7 @@ static int wm9712_soc_probe(struct platform_device *pdev)
         codec->num_dai = ARRAY_SIZE(wm9712_dai);
         codec->write = ac97_write;
         codec->read = ac97_read;
-        codec->dapm_event = wm9712_dapm_event;
+        codec->set_bias_level = wm9712_set_bias_level;
         INIT_LIST_HEAD(&codec->dapm_widgets);
         INIT_LIST_HEAD(&codec->dapm_paths);
 
@@ -703,7 +703,7 @@ static int wm9712_soc_probe(struct platform_device *pdev)
         /* set alc mux to none */
         ac97_write(codec, AC97_VIDEO, ac97_read(codec, AC97_VIDEO) | 0x3000);
 
-        wm9712_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
+        wm9712_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
         wm9712_add_controls(codec);
         wm9712_add_widgets(codec);
         ret = snd_soc_register_card(socdev);