iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ASoC: Avoid wraparound in wm_hubs DC servo correction

Browse Source 
If the correction wraps around then a substantial offset would be
introduced.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-03-29 15:24:40 +01:00
parent b5442a75de
commit 3fa49e3ad9
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/codecs/wm_hubs.c
View File

@ -113,12 +113,14 @@ static void calibrate_dc_servo(struct snd_soc_codec *codec)
/* HPOUT1L */
reg = snd_soc_read(codec, WM8993_DC_SERVO_READBACK_1) &
WM8993_DCS_INTEG_CHAN_0_MASK;;
if (reg + hubs->dcs_codes > 0 && reg + hubs->dcs_codes < 0xff)
reg += hubs->dcs_codes;
dcs_cfg = reg << WM8993_DCS_DAC_WR_VAL_1_SHIFT;
/* HPOUT1R */
reg = snd_soc_read(codec, WM8993_DC_SERVO_READBACK_2) &
WM8993_DCS_INTEG_CHAN_1_MASK;
if (reg + hubs->dcs_codes > 0 && reg + hubs->dcs_codes < 0xff)
reg += hubs->dcs_codes;
dcs_cfg |= reg;