ALSA: cs5535audio: decouple HPF from V_REFOUT in OLPC code
We shouldn't be touching V_REFOUT when we toggle HPF/analog input, so just
drop that code.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c
index 2bd6588..f20e741 100644
--- a/sound/pci/cs5535audio/cs5535audio_olpc.c
+++ b/sound/pci/cs5535audio/cs5535audio_olpc.c
@@ -30,18 +30,11 @@
struct snd_ctl_elem_value *ucontrol)
{
struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol);
- u16 reg1, reg2;
+ u8 val;
- /* if either AD1888 VRef Bias and High Pass Filter are enabled
- or the EC is not in analog mode then flag as not in analog mode.
- No EC command to read current analog state so we cache that. */
- reg1 = snd_ac97_read(cs5535au->ac97, AC97_AD_MISC);
- reg2 = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2);
-
- if ((reg1 & AD1888_VREFOUT_EN_BIT) && (reg2 & AD1888_HPF_EN_BIT))
- ucontrol->value.integer.value[0] = 1;
- else
- ucontrol->value.integer.value[0] = 0;
+ val = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2);
+ val >>= AC97_AD_HPFD_SHIFT;
+ ucontrol->value.integer.value[0] = val & 0x1;
return 0;
}
@@ -57,16 +50,6 @@
/* value is 1 if analog input is desired */
value = ucontrol->value.integer.value[0];
- /* sets High Z on VREF Bias if 1 */
- if (value)
- err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
- AD1888_VREFOUT_EN_BIT, AD1888_VREFOUT_EN_BIT);
- else
- err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
- AD1888_VREFOUT_EN_BIT, 0);
- if (err < 0)
- snd_printk(KERN_ERR "Error updating AD_MISC %d\n", err);
-
/* turns off High Pass Filter if 1 */
if (value)
err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,