[alsa-devel] [PATCH 1/2] usb: audio-v2: Add uac2_effect_unit_descriptor definition

[Takashi Iwai]

The UAC2 Effect Unit Descriptor has a slightly different definition
from other similar ones like Processing Unit or Extension Unit.
Define it here so that it can be used in USB-audio driver in a later
patch.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 include/linux/usb/audio-v2.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index ba4b3e3327ff..cb9900b34b67 100644
--- a/include/linux/usb/audio-v2.h
+++ b/include/linux/usb/audio-v2.h
@@ -156,6 +156,18 @@ struct uac2_feature_unit_descriptor {
 	__u8 bmaControls[0]; /* variable length */
 } __attribute__((packed));
 
+/* 4.7.2.10 Effect Unit Descriptor */
+
+struct uac2_effect_unit_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bUnitID;
+	__le16 wEffectType;
+	__u8 bSourceID;
+	__u8 bmaControls[]; /* variable length */
+} __attribute__((packed));
+
 /* 4.9.2 Class-Specific AS Interface Descriptor */
 
 struct uac2_as_header_descriptor {
-- 
2.16.4