[ALSA] hda-codec - Disable shared stream on AD1986A

AD1986A has a hardware problem that it cannot share a stream with
multiple pins properly.  The problem occurs e.g. when a volume is changed
during playback.
So far, hda-intel driver unconditionally assigns the stream to multiple
output pins in copy-front mode, and this should be avoided for AD1986A
codec.
The original fix patch was by zhejiang <zhe.jiang@intel.com>.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index 0ee8ae4d4410..196ad3c9405d 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -957,6 +957,14 @@ static int patch_ad1986a(struct hda_codec *codec)
                 break;
         }
 
+        /* AD1986A has a hardware problem that it can't share a stream
+         * with multiple output pins.  The copy of front to surrounds
+         * causes noisy or silent outputs at a certain timing, e.g.
+         * changing the volume.
+         * So, let's disable the shared stream.
+         */
+        spec->multiout.no_share_stream = 1;
+
         return 0;
 }