ASoC: Further optimise WM8400 bias configuration sequence

The active discharge does not bring sufficient benefit to justify the
lengthy times involved so don't do that.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 2 insertions, 25 deletions

diff --git a/sound/soc/codecs/wm8400.c b/sound/soc/codecs/wm8400.c
index 744e0dc73be4..462f8b0d9ac7 100644
--- a/sound/soc/codecs/wm8400.c
+++ b/sound/soc/codecs/wm8400.c
@@ -1096,45 +1096,22 @@ static int wm8400_set_bias_level(struct snd_soc_codec *codec,
                         wm8400_write(codec, WM8400_POWER_MANAGEMENT_1,
                                      WM8400_CODEC_ENA | WM8400_SYSCLK_ENA);
 
-                        /* Enable all output discharge bits */
-                        wm8400_write(codec, WM8400_ANTIPOP1, WM8400_DIS_LLINE |
-                                WM8400_DIS_RLINE | WM8400_DIS_OUT3 |
-                                WM8400_DIS_OUT4 | WM8400_DIS_LOUT |
-                                WM8400_DIS_ROUT);
-
                         /* Enable POBCTRL, SOFT_ST, VMIDTOG and BUFDCOPEN */
                         wm8400_write(codec, WM8400_ANTIPOP2, WM8400_SOFTST |
                                      WM8400_BUFDCOPEN | WM8400_POBCTRL);
 
-                        msleep(500);
-
-                        /* Enable outputs */
-                        val = wm8400_read(codec, WM8400_POWER_MANAGEMENT_1);
-                        val |= WM8400_SPK_ENA | WM8400_OUT3_ENA |
-                                WM8400_OUT4_ENA | WM8400_LOUT_ENA |
-                                WM8400_ROUT_ENA;
-                        wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val);
-
-                        /* disable all output discharge bits */
-                        wm8400_write(codec, WM8400_ANTIPOP1, 0);
+                        msleep(50);
 
                         /* Enable VREF & VMID at 2x50k */
+                        val = wm8400_read(codec, WM8400_POWER_MANAGEMENT_1);
                         val |= 0x2 | WM8400_VREF_ENA;
                         wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val);
 
-                        msleep(600);
-
                         /* Enable BUFIOEN */
                         wm8400_write(codec, WM8400_ANTIPOP2, WM8400_SOFTST |
                                      WM8400_BUFDCOPEN | WM8400_POBCTRL |
                                      WM8400_BUFIOEN);
 
-                        /* Disable outputs */
-                        val &= ~(WM8400_SPK_ENA | WM8400_OUT3_ENA |
-                                 WM8400_OUT4_ENA | WM8400_LOUT_ENA |
-                                 WM8400_ROUT_ENA);
-                        wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val);
-
                         /* disable POBCTRL, SOFT_ST and BUFDCOPEN */
                         wm8400_write(codec, WM8400_ANTIPOP2, WM8400_BUFIOEN);
                 }