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    Subject[PATCH 1/2] ALSA: usb-audio: Add bi-directional terminal types.
    Date
    Define the bi-directional USB terminal types for audio devices.

    Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
    ---
    include/uapi/linux/usb/audio.h | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
    index 13d98e6e0db1..74e520fb944f 100644
    --- a/include/uapi/linux/usb/audio.h
    +++ b/include/uapi/linux/usb/audio.h
    @@ -230,6 +230,14 @@ struct uac1_output_terminal_descriptor {
    #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
    #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307

    +/* Terminals - 2.4 Bi-directional Terminal Types */
    +#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400
    +#define UAC_BIDIR_TERMINAL_HANDSET 0x401
    +#define UAC_BIDIR_TERMINAL_HEADSET 0x402
    +#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403
    +#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404
    +#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405
    +
    /* Set bControlSize = 2 as default setting */
    #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)

    --
    2.11.0
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