diff options
| author | Ondrej Zary <linux@rainbow-software.org> | 2010-08-03 23:57:05 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-08-04 07:42:55 +0200 |
| commit | b9619230e1f55a763bc41848c1cd971a394c878c (patch) | |
| tree | 32ec55017f7a8b3cfe6790bf63af93211fe518f0 /sound | |
| parent | dd2f8c2f811b14f97a572edb0da4cfe776e20052 (diff) | |
| download | lwn-b9619230e1f55a763bc41848c1cd971a394c878c.tar.gz lwn-b9619230e1f55a763bc41848c1cd971a394c878c.zip | |
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 <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/als4000.c | 4 |
1 files 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); } |