diff options
| author | b02247 <b02247@freescale.com> | 2013-03-29 14:09:43 +0800 |
|---|---|---|
| committer | b02247 <b02247@freescale.com> | 2013-04-02 18:17:53 +0800 |
| commit | 46ea27cf30c226d6e2e9076e9be7ba452eb5e978 (patch) | |
| tree | 8f2557fad4b1a34fb9b34b99a54fe5875400c36f /sound | |
| parent | 8136a50bd049d68f92604397f256e6067ef2b572 (diff) | |
ENGR00255104 The opening time of cs42888 is very long, about 400ms
In this commit 957bc47ffbad8532f0e8f6463946e8c04bc3176f, add msleep(400)
for reducing noise in the hw_params, but this time is very long for opening
device.
In this patch, remove this time and use the "Soft Ramp on Zero Crossings" to
reduce the noise.
Signed-off-by: b02247 <b02247@freescale.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/cs42888.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sound/soc/codecs/cs42888.c b/sound/soc/codecs/cs42888.c index 698ff4b59826..03f160b8cfad 100644 --- a/sound/soc/codecs/cs42888.c +++ b/sound/soc/codecs/cs42888.c @@ -1,6 +1,6 @@ /* * cs42888.c -- CS42888 ALSA SoC Audio Driver - * Copyright (C) 2010-2012 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved. */ /* * The code contained herein is licensed under the GNU General Public @@ -129,6 +129,11 @@ static const char *cs42888_supply_names[CS42888_NUM_SUPPLIES] = { #define CS42888_TRANS_ADC_SNGVOL_MASK (1 << CS42888_TRANS_ADC_SNGVOL_OFFSET) #define CS42888_TRANS_ADC_SZC_MASK (3 << CS42888_TRANS_ADC_SZC_OFFSET) +#define CS42888_TRANS_DAC_SZC_IC (0 << CS42888_TRANS_DAC_SZC_OFFSET) +#define CS42888_TRANS_DAC_SZC_ZC (1 << CS42888_TRANS_DAC_SZC_OFFSET) +#define CS42888_TRANS_DAC_SZC_SR (2 << CS42888_TRANS_DAC_SZC_OFFSET) +#define CS42888_TRANS_DAC_SZC_SRZC (3 << CS42888_TRANS_DAC_SZC_OFFSET) + #define CS42888_MUTE_AOUT8 (0x1 << 7) #define CS42888_MUTE_AOUT7 (0x1 << 6) #define CS42888_MUTE_AOUT6 (0x1 << 5) @@ -717,7 +722,6 @@ static int cs42888_hw_params(struct snd_pcm_substream *substream, pr_err("i2c write failed\n"); return ret; } - msleep(400); ret = cs42888_fill_cache(codec); if (ret < 0) { @@ -884,6 +888,8 @@ static int cs42888_probe(struct snd_soc_codec *codec) /* Disable auto-mute */ val = snd_soc_read(codec, CS42888_TRANS); val &= ~CS42888_TRANS_AMUTE_MASK; + val &= ~CS42888_TRANS_DAC_SZC_MASK; + val |= CS42888_TRANS_DAC_SZC_SR; ret = snd_soc_write(codec, CS42888_TRANS, val); if (ret < 0) { pr_err("i2c write failed\n"); |