ALSA: hda: Virtualize SPDIF out controls

The SPDIF output controls apply to converter widgets. A future change
will create a PCM device per pin widget, and hence a set of SPDIF output
controls per pin widget, for certain HDMI codecs. To support this, we
need the ability to virtualize the SPDIF output controls. Specifically:

* Controls can be "unassigned" from real hardware when a converter is
  not used for the PCM the control was created for.
* Control puts only write to hardware when they are assigned.
* Controls can be "assigned" to real hardware when a converter is picked
  to support output for a particular PCM.
* When a converter is assigned, the hardware is updated to the cached
  configuration.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index d694e9d4921d..0f7b8951440f 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -213,7 +213,9 @@ static int ad198x_build_controls(struct hda_codec *codec)
                         return err;
         }
         if (spec->multiout.dig_out_nid) {
-                err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
+                err = snd_hda_create_spdif_out_ctls(codec,
+                                                    spec->multiout.dig_out_nid,
+                                                    spec->multiout.dig_out_nid);
                 if (err < 0)
                         return err;
                 err = snd_hda_create_spdif_share_sw(codec,