ALSA: hda - Limit codec-verb retry to limited hardwares

The reset of a BUS controller during operations is somehow risky and
shouldn't be done inevitably for devices that have apparently no such
codec-communication problems.

This patch adds the check of the hardware and limits the bus-reset
capability.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 48f4a36c4813..42f944bb641d 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -5375,6 +5375,15 @@ again:
         if (get_wcaps(codec, 0xa) & AC_WCAP_IN_AMP)
                 snd_hda_sequence_write_cache(codec, unmute_init);
 
+        /* Some HP machines seem to have unstable codec communications
+         * especially with ATI fglrx driver.  For recovering from the
+         * CORB/RIRB stall, allow the BUS reset and keep always sync
+         */
+        if (spec->board_config == STAC_HP_DV5) {
+                codec->bus->sync_write = 1;
+                codec->bus->allow_bus_reset = 1;
+        }
+
         spec->aloopback_ctl = stac92hd71bxx_loopback;
         spec->aloopback_mask = 0x50;
         spec->aloopback_shift = 0;