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| author | Peer Chen <peerchen@gmail.com> | 2008-08-20 16:43:24 -0700 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-08-21 10:46:46 +0200 |
| commit | 320dcc30f498e0a8b282b14cf0feed1897ea3b34 (patch) | |
| tree | 2a56e270d1249759243f9ed32d6b957cf33d80bf /sound/pci | |
| parent | f511b01c8e747b80635c8b2acd61431abcab4b29 (diff) | |
| download | linux-320dcc30f498e0a8b282b14cf0feed1897ea3b34.tar.gz linux-320dcc30f498e0a8b282b14cf0feed1897ea3b34.tar.bz2 linux-320dcc30f498e0a8b282b14cf0feed1897ea3b34.zip | |
ALSA: hda_intel: enable snoop for nvidia HDA controller
Enable the snoop for nvidia hda controller to avoid data coherence issue.
Signed-off-by: Peer Chen <peerchen@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index a73d6ca0a906..1c53e337ecb2 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -278,6 +278,9 @@ enum { /* Defines for Nvidia HDA support */ #define NVIDIA_HDA_TRANSREG_ADDR 0x4e #define NVIDIA_HDA_ENABLE_COHBITS 0x0f +#define NVIDIA_HDA_ISTRM_COH 0x4d +#define NVIDIA_HDA_OSTRM_COH 0x4c +#define NVIDIA_HDA_ENABLE_COHBIT 0x01 /* Defines for Intel SCH HDA snoop control */ #define INTEL_SCH_HDA_DEVC 0x78 @@ -900,6 +903,12 @@ static void azx_init_pci(struct azx *chip) update_pci_byte(chip->pci, NVIDIA_HDA_TRANSREG_ADDR, 0x0f, NVIDIA_HDA_ENABLE_COHBITS); + update_pci_byte(chip->pci, + NVIDIA_HDA_ISTRM_COH, + 0x01, NVIDIA_HDA_ENABLE_COHBIT); + update_pci_byte(chip->pci, + NVIDIA_HDA_OSTRM_COH, + 0x01, NVIDIA_HDA_ENABLE_COHBIT); break; case AZX_DRIVER_SCH: pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop); |