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| author | Florian Zumbiehl <florz@florz.de> | 2010-01-26 09:06:14 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-01-26 09:06:14 +0100 |
| commit | cf944ee55cc318bdb1d4b2f3f5cce3257f7c07b3 (patch) | |
| tree | 5aeb9e60cffadd55e5a732ce261aa3e8b425ab3c /sound/pci/cs46xx/cs46xx_lib.c | |
| parent | 6250b9ced23032789ca9739d6a53949637f9c836 (diff) | |
| download | lwn-cf944ee55cc318bdb1d4b2f3f5cce3257f7c07b3.tar.gz lwn-cf944ee55cc318bdb1d4b2f3f5cce3257f7c07b3.zip | |
ALSA: cs46xx: Fix cpu idling with resume
Make sure that capture DMA doesn't stay enabled after system resume
as that potentially prevents the processor from entering deep sleep
states.
Signed-off-by: Florian Zumbiehl <florz@florz.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/cs46xx/cs46xx_lib.c')
| -rw-r--r-- | sound/pci/cs46xx/cs46xx_lib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c index e6b4a879ae2e..56fcf00c0e27 100644 --- a/sound/pci/cs46xx/cs46xx_lib.c +++ b/sound/pci/cs46xx/cs46xx_lib.c @@ -3644,6 +3644,7 @@ int snd_cs46xx_resume(struct pci_dev *pci) #ifdef CONFIG_SND_CS46XX_NEW_DSP int i; #endif + unsigned int tmp; pci_set_power_state(pci, PCI_D0); pci_restore_state(pci); @@ -3685,6 +3686,15 @@ int snd_cs46xx_resume(struct pci_dev *pci) snd_ac97_resume(chip->ac97[CS46XX_PRIMARY_CODEC_INDEX]); snd_ac97_resume(chip->ac97[CS46XX_SECONDARY_CODEC_INDEX]); + /* + * Stop capture DMA. + */ + tmp = snd_cs46xx_peek(chip, BA1_CCTL); + chip->capt.ctl = tmp & 0x0000ffff; + snd_cs46xx_poke(chip, BA1_CCTL, tmp & 0xffff0000); + + mdelay(5); + /* reset playback/capture */ snd_cs46xx_set_play_sample_rate(chip, 8000); snd_cs46xx_set_capture_sample_rate(chip, 8000); |