korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-17 01:04:19 +08:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: Refresh WM8750 bias management

Browse Source 
The WM8750 is using some delayed work to manage the ramping of the bias
at startup and resume out of line from the normal flow.  This predates
the support within ASoC core for moving the resume out of line from the
main system resume which provides equivalent functionality with better
interaction with applications.  Change to doing the ramp in line to make
use of the core functionality.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2010-03-17 11:51:33 +00:00
parent a6c65736bc
commit dd76769dd5
1 changed files with 9 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
sound/soc/codecs/wm8750.c
View File

@ -611,10 +611,16 @@ static int wm8750_set_bias_level(struct snd_soc_codec *codec,
snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
break;
case SND_SOC_BIAS_PREPARE:
/* set vmid to 5k for quick power up */
snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->bias_level == SND_SOC_BIAS_OFF) {
/* Set VMID to 5k */
snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
/* ...and ramp */
msleep(1000);
}
/* mute dac and set vmid to 500k, enable VREF */
snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
break;
@ -658,13 +664,6 @@ struct snd_soc_dai wm8750_dai = {
};
EXPORT_SYMBOL_GPL(wm8750_dai);
static void wm8750_work(struct work_struct *work)
{
struct snd_soc_codec *codec =
container_of(work, struct snd_soc_codec, delayed_work.work);
wm8750_set_bias_level(codec, codec->bias_level);
}
static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@ -693,14 +692,6 @@ static int wm8750_resume(struct platform_device *pdev)
wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* charge wm8750 caps */
if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
codec->bias_level = SND_SOC_BIAS_ON;
schedule_delayed_work(&codec->delayed_work,
msecs_to_jiffies(1000));
}
return 0;
}
@ -744,9 +735,7 @@ static int wm8750_init(struct snd_soc_device *socdev,
}
/* charge output caps */
wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
codec->bias_level = SND_SOC_BIAS_STANDBY;
schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* set the update bits */
reg = snd_soc_read(codec, WM8750_LDAC);
@ -926,7 +915,6 @@ static int wm8750_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
wm8750_socdev = socdev;
INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
ret = -ENODEV;
@ -950,25 +938,6 @@ static int wm8750_probe(struct platform_device *pdev)
return ret;
}
/*
* This function forces any delayed work to be queued and run.
*/
static int run_delayed_work(struct delayed_work *dwork)
{
int ret;
/* cancel any work waiting to be queued. */
ret = cancel_delayed_work(dwork);
/* if there was any work waiting then we run it now and
* wait for it's completion */
if (ret) {
schedule_delayed_work(dwork, 0);
flush_scheduled_work();
}
return ret;
}
/* power down chip */
static int wm8750_remove(struct platform_device *pdev)
{
@ -977,7 +946,6 @@ static int wm8750_remove(struct platform_device *pdev)
if (codec->control_data)
wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
run_delayed_work(&codec->delayed_work);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)