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ALSA: virtuoso: wait for PCM1796 clock to become stable 

The PCM1796 needs the master clock for I2C communication to work, so
add delays after clock changes to ensure that the clock is stable when
we try to write the DACs' registers.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch 2011-01-10 16:02:32 +01:00 committed by Takashi Iwai
parent 4106055ced
commit 79815e004c
1 changed files with 5 additions and 0 deletions
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5
sound/pci/oxygen/xonar_pcm179x.c
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@ -303,6 +303,7 @@ static void pcm1796_registers_init(struct oxygen *chip)
unsigned int i;
s8 gain_offset;
msleep(1);
gain_offset = data->hp_active ? data->hp_gain_offset : 0;
for (i = 0; i < data->dacs; ++i) {
/* set ATLD before ATL/ATR */
@ -451,6 +452,7 @@ static void cs2000_registers_init(struct oxygen *chip)
data->cs2000_regs[CS2000_FUN_CFG_1]);
cs2000_write(chip, CS2000_FUN_CFG_2, 0);
cs2000_write(chip, CS2000_GLOBAL_CFG, CS2000_EN_DEV_CFG_2);
msleep(3); /* PLL lock delay */
}
static void xonar_st_init(struct oxygen *chip)
@ -592,6 +594,7 @@ static void set_pcm1796_params(struct oxygen *chip,
{
struct xonar_pcm179x *data = chip->model_data;
msleep(1);
data->current_rate = params_rate(params);
update_pcm1796_oversampling(chip);
}
@ -669,6 +672,7 @@ static void update_cs2000_rate(struct oxygen *chip, unsigned int rate)
else
reg = CS2000_REF_CLK_DIV_2;
cs2000_write_cached(chip, CS2000_FUN_CFG_1, reg);
msleep(3); /* PLL lock delay */
}
static void set_st_params(struct oxygen *chip,
@ -796,6 +800,7 @@ static int os_128_put(struct snd_kcontrol *ctl,
oxygen_write16_masked(chip, OXYGEN_I2S_MULTICH_FORMAT,
mclk_from_rate(chip, data->current_rate),
OXYGEN_I2S_MCLK_MASK);
msleep(1);
update_pcm1796_oversampling(chip);
}
mutex_unlock(&chip->mutex);