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usb: audio-v2: Add uac2_effect_unit_descriptor definition 

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.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200213112059.18745-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2020-02-13 12:20:58 +01:00
parent dfa9a5efe8
commit 10fa951276
1 changed files with 12 additions and 0 deletions
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12
include/linux/usb/audio-v2.h
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@ -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 {