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ALSA: virtuoso: use lower master clock with H6 daughterboard 

Because of the unshielded connector cable, it is important to use as low
a master clock frequency as possible with the H6.

For double rate modes (64-96 kHz), the MCLK rate is unconditionally
lowered from 512x to 256x because the higher rate would not improve
anything.

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 16:09:23 +01:00 committed by Takashi Iwai
parent d353eaa9a8
commit 00b8dd7dd7
1 changed files with 18 additions and 13 deletions
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31
sound/pci/oxygen/xonar_pcm179x.c
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@ -224,6 +224,7 @@ struct xonar_pcm179x {
u8 pcm1796_regs[4][5];
unsigned int current_rate;
bool os_128;
bool h6;
bool hp_active;
s8 hp_gain_offset;
bool has_cs2000;
@ -384,6 +385,7 @@ static void xonar_hdav_init(struct oxygen *chip)
data->pcm179x.generic.ext_power_int_reg = OXYGEN_GPI_INTERRUPT_MASK;
data->pcm179x.generic.ext_power_bit = GPI_EXT_POWER;
data->pcm179x.dacs = chip->model.dac_channels_mixer / 2;
data->pcm179x.h6 = chip->model.dac_channels_mixer > 2;
pcm1796_init(chip);
@ -461,6 +463,7 @@ static void xonar_st_init(struct oxygen *chip)
struct xonar_pcm179x *data = chip->model_data;
data->generic.anti_pop_delay = 100;
data->h6 = chip->model.dac_channels_mixer > 2;
data->has_cs2000 = 1;
data->cs2000_regs[CS2000_FUN_CFG_1] = CS2000_REF_CLK_DIV_1;
data->broken_i2c = true;
@ -554,11 +557,10 @@ static unsigned int mclk_from_rate(struct oxygen *chip, unsigned int rate)
struct xonar_pcm179x *data = chip->model_data;
if (rate <= 32000)
return OXYGEN_I2S_MCLK_512;
else if (rate <= 48000 && data->os_128)
return OXYGEN_I2S_MCLK_512;
else if (rate <= 96000)
return OXYGEN_I2S_MCLK_256;
return data->h6 ? OXYGEN_I2S_MCLK_256 : OXYGEN_I2S_MCLK_512;
else if (rate <= 48000)
return data->os_128 && !data->h6
? OXYGEN_I2S_MCLK_512 : OXYGEN_I2S_MCLK_256;
else
return OXYGEN_I2S_MCLK_128;
}
@ -579,9 +581,9 @@ static void update_pcm1796_oversampling(struct oxygen *chip)
unsigned int i;
u8 reg;
if (data->current_rate <= 32000)
if (data->current_rate <= 32000 && !data->h6)
reg = PCM1796_OS_128;
else if (data->current_rate <= 48000 && data->os_128)
else if (data->current_rate <= 48000 && data->os_128 && !data->h6)
reg = PCM1796_OS_128;
else if (data->current_rate <= 96000 || data->os_128)
reg = PCM1796_OS_64;
@ -636,28 +638,31 @@ static void update_cs2000_rate(struct oxygen *chip, unsigned int rate)
switch (rate) {
case 32000:
rate_mclk = OXYGEN_RATE_32000 | OXYGEN_I2S_MCLK_512;
if (data->h6)
rate_mclk = OXYGEN_RATE_32000 | OXYGEN_I2S_MCLK_256;
else
rate_mclk = OXYGEN_RATE_32000 | OXYGEN_I2S_MCLK_512;
break;
case 44100:
if (data->os_128)
if (data->os_128 && !data->h6)
rate_mclk = OXYGEN_RATE_44100 | OXYGEN_I2S_MCLK_512;
else
rate_mclk = OXYGEN_RATE_44100 | OXYGEN_I2S_MCLK_256;
break;
default: /* 48000 */
if (data->os_128)
if (data->os_128 && !data->h6)
rate_mclk = OXYGEN_RATE_48000 | OXYGEN_I2S_MCLK_512;
else
rate_mclk = OXYGEN_RATE_48000 | OXYGEN_I2S_MCLK_256;
break;
case 64000:
rate_mclk = OXYGEN_RATE_32000 | OXYGEN_I2S_MCLK_512;
rate_mclk = OXYGEN_RATE_32000 | OXYGEN_I2S_MCLK_256;
break;
case 88200:
rate_mclk = OXYGEN_RATE_44100 | OXYGEN_I2S_MCLK_512;
rate_mclk = OXYGEN_RATE_44100 | OXYGEN_I2S_MCLK_256;
break;
case 96000:
rate_mclk = OXYGEN_RATE_48000 | OXYGEN_I2S_MCLK_512;
rate_mclk = OXYGEN_RATE_48000 | OXYGEN_I2S_MCLK_256;
break;
case 176400:
rate_mclk = OXYGEN_RATE_44100 | OXYGEN_I2S_MCLK_512;