Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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>
authored by Peer Chen and committed by Takashi Iwai 320dcc30 f511b01c
+9
sound/pci/hda/hda_intel.c
+9
sound/pci/hda/hda_intel.c
···
278
/* Defines for Nvidia HDA support */
279
#define NVIDIA_HDA_TRANSREG_ADDR 0x4e
280
#define NVIDIA_HDA_ENABLE_COHBITS 0x0f
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282
/* Defines for Intel SCH HDA snoop control */
283
#define INTEL_SCH_HDA_DEVC 0x78
···
903
update_pci_byte(chip->pci,
904
NVIDIA_HDA_TRANSREG_ADDR,
905
0x0f, NVIDIA_HDA_ENABLE_COHBITS);
906
break;
907
case AZX_DRIVER_SCH:
908
pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop);
···
278
/* Defines for Nvidia HDA support */
279
#define NVIDIA_HDA_TRANSREG_ADDR 0x4e
280
#define NVIDIA_HDA_ENABLE_COHBITS 0x0f
281
+
#define NVIDIA_HDA_ISTRM_COH 0x4d
282
+
#define NVIDIA_HDA_OSTRM_COH 0x4c
283
+
#define NVIDIA_HDA_ENABLE_COHBIT 0x01
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/* Defines for Intel SCH HDA snoop control */
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#define INTEL_SCH_HDA_DEVC 0x78
···
900
update_pci_byte(chip->pci,
901
NVIDIA_HDA_TRANSREG_ADDR,
902
0x0f, NVIDIA_HDA_ENABLE_COHBITS);
903
+
update_pci_byte(chip->pci,
904
+
NVIDIA_HDA_ISTRM_COH,
905
+
0x01, NVIDIA_HDA_ENABLE_COHBIT);
906
+
update_pci_byte(chip->pci,
907
+
NVIDIA_HDA_OSTRM_COH,
908
+
0x01, NVIDIA_HDA_ENABLE_COHBIT);
909
break;
910
case AZX_DRIVER_SCH:
911
pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop);