From b9619230e1f55a763bc41848c1cd971a394c878c Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Tue, 3 Aug 2010 23:57:05 +0200 Subject: [PATCH] ALSA: als4000: enable burst mode Enable burst mode to prevent dropouts during high PCI bus usage. The card is useless in X without this because of dropouts when anything moves on the screen (at least with PCI VGA card). Enabling this is also recommended by the datasheet (page 48). Signed-off-by: Ondrej Zary Signed-off-by: Takashi Iwai --- sound/pci/als4000.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c index 6cf1de8042e8..036a9ba8e1a5 100644 --- a/sound/pci/als4000.c +++ b/sound/pci/als4000.c @@ -763,9 +763,9 @@ static void snd_als4000_configure(struct snd_sb *chip) /* SPECS_PAGE: 39 */ for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i) snd_als4k_gcr_write(chip, i, 0); - + /* enable burst mode to prevent dropouts during high PCI bus usage */ snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL, - snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL)); + snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) | 0x04); spin_unlock_irq(&chip->reg_lock); }