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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>
This commit is contained in:
Florian Zumbiehl 2010-01-26 09:06:14 +01:00 committed by Takashi Iwai
parent 6250b9ced2
commit cf944ee55c
1 changed files with 10 additions and 0 deletions
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10
sound/pci/cs46xx/cs46xx_lib.c
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@ -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);