From cf944ee55cc318bdb1d4b2f3f5cce3257f7c07b3 Mon Sep 17 00:00:00 2001 From: Florian Zumbiehl Date: Tue, 26 Jan 2010 09:06:14 +0100 Subject: 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 Signed-off-by: Takashi Iwai --- sound/pci/cs46xx/cs46xx_lib.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'sound/pci') diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c index e6b4a879ae2..56fcf00c0e2 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); -- cgit v1.2.3