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Diffstat (limited to 'sound/pci/hda/hda_intel.c')
-rw-r--r--sound/pci/hda/hda_intel.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index fcedad9a5fe..70a9d32f0e9 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1052,9 +1052,12 @@ static void azx_init_pci(struct azx *chip)
/* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
* TCSEL == Traffic Class Select Register, which sets PCI express QOS
* Ensuring these bits are 0 clears playback static on some HD Audio
- * codecs
+ * codecs.
+ * The PCI register TCSEL is defined in the Intel manuals.
*/
- update_pci_byte(chip->pci, ICH6_PCIREG_TCSEL, 0x07, 0);
+ if (chip->driver_type != AZX_DRIVER_ATI &&
+ chip->driver_type != AZX_DRIVER_ATIHDMI)
+ update_pci_byte(chip->pci, ICH6_PCIREG_TCSEL, 0x07, 0);
switch (chip->driver_type) {
case AZX_DRIVER_ATI: