ALSA: hda - Enable sync_write workaround for AMD generically

The workaround for AMD chipset via sync_write flag seems needed for
machines with Realtek codecs.  So, it's better to activate it
generically in hda_intel.c from the beginning.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 6f891ee82a7c..f95ff6e029a9 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1447,6 +1447,17 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
                 }
         }
 
+        /* AMD chipsets often cause the communication stalls upon certain
+         * sequence like the pin-detection.  It seems that forcing the synced
+         * access works around the stall.  Grrr...
+         */
+        if (chip->pci->vendor == PCI_VENDOR_ID_AMD ||
+            chip->pci->vendor == PCI_VENDOR_ID_ATI) {
+                snd_printk(KERN_INFO SFX "Enable sync_write for AMD chipset\n");
+                chip->bus->sync_write = 1;
+                chip->bus->allow_bus_reset = 1;
+        }
+
         /* Then create codec instances */
         for (c = 0; c < max_slots; c++) {
                 if ((chip->codec_mask & (1 << c)) & chip->codec_probe_mask) {