From 79815e004c75dcc2be6433737b5678cee80035db Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Mon, 10 Jan 2011 16:02:32 +0100 Subject: [PATCH] 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 Signed-off-by: Takashi Iwai --- sound/pci/oxygen/xonar_pcm179x.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/pci/oxygen/xonar_pcm179x.c b/sound/pci/oxygen/xonar_pcm179x.c index 49898d3..5ec164a 100644 --- a/sound/pci/oxygen/xonar_pcm179x.c +++ b/sound/pci/oxygen/xonar_pcm179x.c @@ -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); -- 2.7.4