diff options
| author | Trent Piepho <xyzzy@speakeasy.org> | 2007-09-07 13:18:50 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2007-10-16 16:49:15 +0200 |
| commit | 950fb626dc28e17ae4ad01dba07957bdc6e0b997 (patch) | |
| tree | 9f2dd67fcf9a3dc01fc9f72e704803783c54191e /sound/pci/bt87x.c | |
| parent | [ALSA] cmipci: add msbits constraint for 24-bit format (diff) | |
| download | linux-950fb626dc28e17ae4ad01dba07957bdc6e0b997.tar.xz linux-950fb626dc28e17ae4ad01dba07957bdc6e0b997.zip | |
[ALSA] snd-bt87x: Power down audio ADC when not in use
Sets a bit to power down the Bt87x's internal audio ADC when the ALSA device
isn't open, or when it is in 'digital mode' using an external ADC.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci/bt87x.c')
| -rw-r--r-- | sound/pci/bt87x.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c index 10c8af1b736b..42e57fd02d39 100644 --- a/sound/pci/bt87x.c +++ b/sound/pci/bt87x.c @@ -377,7 +377,7 @@ static struct snd_pcm_hardware snd_bt87x_analog_hw = { static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime) { - chip->reg_control |= CTL_DA_IOM_DA; + chip->reg_control |= CTL_DA_IOM_DA | CTL_A_PWRDN; runtime->hw = snd_bt87x_digital_hw; runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->board.dig_rate); runtime->hw.rate_min = chip->board.dig_rate; @@ -398,7 +398,7 @@ static int snd_bt87x_set_analog_hw(struct snd_bt87x *chip, struct snd_pcm_runtim .rats = &analog_clock }; - chip->reg_control &= ~CTL_DA_IOM_DA; + chip->reg_control &= ~(CTL_DA_IOM_DA | CTL_A_PWRDN); runtime->hw = snd_bt87x_analog_hw; return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &constraint_rates); @@ -437,6 +437,11 @@ static int snd_bt87x_close(struct snd_pcm_substream *substream) { struct snd_bt87x *chip = snd_pcm_substream_chip(substream); + spin_lock_irq(&chip->reg_lock); + chip->reg_control |= CTL_A_PWRDN; + snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control); + spin_unlock_irq(&chip->reg_lock); + chip->substream = NULL; clear_bit(0, &chip->opened); smp_mb__after_clear_bit(); @@ -751,7 +756,8 @@ static int __devinit snd_bt87x_create(struct snd_card *card, goto fail; } - chip->reg_control = CTL_DA_ES2 | CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT); + chip->reg_control = CTL_A_PWRDN | CTL_DA_ES2 | + CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT); chip->interrupt_mask = MY_INTERRUPTS; snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control); snd_bt87x_writel(chip, REG_INT_MASK, 0); |