openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ASoC: wm8962: Enable start-up and normal bias after reset in runtime resume 

This part of bias settings are essential for WM8962 to power up. Without it
"wm8962 0-001a: DC servo timed out" might be prompted due to power-up failure
that happens to FLL if being used.

The driver's also bringing the bias down in the suspend path so it needs to be
powered up in the resume path for symmetry.

According to dapm_pre_sequence_async(), DAPM would call pm_runtime_get_sync()
to let driver finish the bias settings in pm_runtime_resume() before the bias
level being set to STANDBY. So no need to worry about disordered settings for
VMID of WM8962.

Signed-off-by: Nicolin Chen <b42378@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Nicolin Chen 2013-06-14 19:49:06 +08:00 committed by Mark Brown
parent 2e7ee15ced
commit f5055f9373
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
sound/soc/codecs/wm8962.c
View File

@ -3723,6 +3723,17 @@ static int wm8962_runtime_resume(struct device *dev)
regcache_sync(wm8962->regmap); regcache_sync(wm8962->regmap);
regmap_update_bits(wm8962->regmap, WM8962_ANTI_POP,
WM8962_STARTUP_BIAS_ENA | WM8962_VMID_BUF_ENA,
WM8962_STARTUP_BIAS_ENA | WM8962_VMID_BUF_ENA);
/* Bias enable at 2*5k (fast start-up) */
regmap_update_bits(wm8962->regmap, WM8962_PWR_MGMT_1,
WM8962_BIAS_ENA | WM8962_VMID_SEL_MASK,
WM8962_BIAS_ENA | 0x180);
msleep(5);
return 0; return 0;
} }