ALSA: ASoC: Implement WM8510 bias level control
The WM8510 bias level configuration blindly overwrites the power
management registers, interfering with the operation of DAPM.
Only adjust the specific bits required, implementing use of the VMID
resistor string configuration control as we go.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/soc/codecs/wm8510.c b/sound/soc/codecs/wm8510.c
index 142c49b..94cab49 100644
--- a/sound/soc/codecs/wm8510.c
+++ b/sound/soc/codecs/wm8510.c
@@ -55,6 +55,9 @@
0x0001,
};
+#define WM8510_POWER1_BIASEN 0x08
+#define WM8510_POWER1_BUFIOEN 0x10
+
/*
* read wm8510 register cache
*/
@@ -526,23 +529,35 @@
static int wm8510_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ u16 power1 = wm8510_read_reg_cache(codec, WM8510_POWER1) & ~0x3;
switch (level) {
case SND_SOC_BIAS_ON:
- wm8510_write(codec, WM8510_POWER1, 0x1ff);
- wm8510_write(codec, WM8510_POWER2, 0x1ff);
- wm8510_write(codec, WM8510_POWER3, 0x1ff);
- break;
case SND_SOC_BIAS_PREPARE:
- case SND_SOC_BIAS_STANDBY:
+ power1 |= 0x1; /* VMID 50k */
+ wm8510_write(codec, WM8510_POWER1, power1);
break;
+
+ case SND_SOC_BIAS_STANDBY:
+ power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN;
+
+ if (codec->bias_level == SND_SOC_BIAS_OFF) {
+ /* Initial cap charge at VMID 5k */
+ wm8510_write(codec, WM8510_POWER1, power1 | 0x3);
+ mdelay(100);
+ }
+
+ power1 |= 0x2; /* VMID 500k */
+ wm8510_write(codec, WM8510_POWER1, power1);
+ break;
+
case SND_SOC_BIAS_OFF:
- /* everything off, dac mute, inactive */
- wm8510_write(codec, WM8510_POWER1, 0x0);
- wm8510_write(codec, WM8510_POWER2, 0x0);
- wm8510_write(codec, WM8510_POWER3, 0x0);
+ wm8510_write(codec, WM8510_POWER1, 0);
+ wm8510_write(codec, WM8510_POWER2, 0);
+ wm8510_write(codec, WM8510_POWER3, 0);
break;
}
+
codec->bias_level = level;
return 0;
}
@@ -640,6 +655,7 @@
}
/* power on device */
+ codec->bias_level = SND_SOC_BIAS_OFF;
wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
wm8510_add_controls(codec);
wm8510_add_widgets(codec);