ALSA: virtio: add support for audio controls

[linux-2.6-microblaze.git] / sound / virtio / virtio_card.h

diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h
index 86ef394..3ceee4e 100644 (file)
--- a/sound/virtio/virtio_card.h
+++ b/sound/virtio/virtio_card.h
@@ -31,6 +31,16 @@ struct virtio_snd_queue {
        struct virtqueue *vqueue;
 };
 
+/**
+ * struct virtio_kctl - VirtIO control element.
+ * @kctl: ALSA control element.
+ * @items: Items for the ENUMERATED element type.
+ */
+struct virtio_kctl {
+       struct snd_kcontrol *kctl;
+       struct virtio_snd_ctl_enum_item *items;
+};
+
 /**
  * struct virtio_snd - VirtIO sound card device.
  * @vdev: Underlying virtio device.
@@ -45,6 +55,9 @@ struct virtio_snd_queue {
  * @nsubstreams: Number of PCM substreams.
  * @chmaps: VirtIO channel maps.
  * @nchmaps: Number of channel maps.
+ * @kctl_infos: VirtIO control element information.
+ * @kctls: VirtIO control elements.
+ * @nkctls: Number of control elements.
  */
 struct virtio_snd {
        struct virtio_device *vdev;
@@ -59,6 +72,9 @@ struct virtio_snd {
        u32 nsubstreams;
        struct virtio_snd_chmap_info *chmaps;
        u32 nchmaps;
+       struct virtio_snd_ctl_info *kctl_infos;
+       struct virtio_kctl *kctls;
+       u32 nkctls;
 };
 
 /* Message completion timeout in milliseconds (module parameter). */
@@ -108,4 +124,10 @@ int virtsnd_chmap_parse_cfg(struct virtio_snd *snd);
 
 int virtsnd_chmap_build_devs(struct virtio_snd *snd);
 
+int virtsnd_kctl_parse_cfg(struct virtio_snd *snd);
+
+int virtsnd_kctl_build_devs(struct virtio_snd *snd);
+
+void virtsnd_kctl_event(struct virtio_snd *snd, struct virtio_snd_event *event);
+
 #endif /* VIRTIO_SND_CARD_H */