[alsa-devel] [PATCH] ASoC: tlv320dac33: Lower the OSC calibration time
To get correct calibration, we can decrease the time needed for the OSC to calibrate itself. With this change we can safe ~15ms in the OSC calibration phase.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com --- sound/soc/codecs/tlv320dac33.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c index c109f6d..401a7ce 100644 --- a/sound/soc/codecs/tlv320dac33.c +++ b/sound/soc/codecs/tlv320dac33.c @@ -946,8 +946,8 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream) /* Write registers 0x08 and 0x09 (MSB, LSB) */ dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
- /* calib time: 128 is a nice number ;) */ - dac33_write(codec, DAC33_CALIB_TIME, 128); + /* OSC calibration time */ + dac33_write(codec, DAC33_CALIB_TIME, 96);
/* adjustment treshold & step */ dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
On Mon, Apr 11, 2011 at 08:57:44PM +0800, Peter Ujfalusi wrote:
To get correct calibration, we can decrease the time needed for the OSC to calibrate itself. With this change we can safe ~15ms in the OSC
s/safe/save/
calibration phase.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com
sound/soc/codecs/tlv320dac33.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c index c109f6d..401a7ce 100644 --- a/sound/soc/codecs/tlv320dac33.c +++ b/sound/soc/codecs/tlv320dac33.c @@ -946,8 +946,8 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream) /* Write registers 0x08 and 0x09 (MSB, LSB) */ dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
- /* calib time: 128 is a nice number ;) */
- dac33_write(codec, DAC33_CALIB_TIME, 128);
/* OSC calibration time */
dac33_write(codec, DAC33_CALIB_TIME, 96);
/* adjustment treshold & step */ dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
-- 1.7.4.1
Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
From: ext Lu Guanqun [guanqun.lu@intel.com] Sent: Monday, April 11, 2011 16:05 To: Ujfalusi Peter (Nokia-SD/Tampere) Cc: alsa-devel@alsa-project.org; Mark Brown; Liam Girdwood Subject: Re: [alsa-devel] [PATCH] ASoC: tlv320dac33: Lower the OSC calibration time
On Mon, Apr 11, 2011 at 08:57:44PM +0800, Peter Ujfalusi wrote:
To get correct calibration, we can decrease the time needed for the OSC to calibrate itself. With this change we can safe ~15ms in the OSC
s/safe/save/
Argh, thanks for noticing it, I'll resend it with the fixed message.
calibration phase.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com
Peter
On Mon, Apr 11, 2011 at 03:57:44PM +0300, Peter Ujfalusi wrote:
To get correct calibration, we can decrease the time needed for the OSC to calibrate itself. With this change we can safe ~15ms in the OSC calibration phase.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com
Acked-by: Mark Brown broonie@opensource.wolfsonmicro.com
participants (4)
-
Lu Guanqun -
Mark Brown -
Peter Ujfalusi -
peter.ujfalusi＠nokia.com