From: Pavel Hofman pavel.hofman@ivitera.com
commit 5432184107cd0013761bdfa6cb6079527ef87b95 upstream.
Several users have reported that their Win10 does not enumerate UAC2 gadget with the existing wTerminalType set to UAC_INPUT_TERMINAL_UNDEFINED/UAC_INPUT_TERMINAL_UNDEFINED, e.g. https://github.com/raspberrypi/linux/issues/4587#issuecomment-926567213. While the constant is officially defined by the USB terminal types document, e.g. XMOS firmware for UAC2 (commonly used for Win10) defines no undefined output terminal type in its usbaudio20.h header.
Therefore wTerminalType of EP-IN is set to UAC_INPUT_TERMINAL_MICROPHONE and wTerminalType of EP-OUT to UAC_OUTPUT_TERMINAL_SPEAKER for the UAC2 gadget.
Signed-off-by: Pavel Hofman pavel.hofman@ivitera.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20220131071813.7433-1-pavel.hofman@ivitera.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/f_uac2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/gadget/function/f_uac2.c +++ b/drivers/usb/gadget/function/f_uac2.c @@ -202,7 +202,7 @@ static struct uac2_input_terminal_descri
.bDescriptorSubtype = UAC_INPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ - .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED), + .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE), .bAssocTerminal = 0, /* .bCSourceID = DYNAMIC */ .iChannelNames = 0, @@ -230,7 +230,7 @@ static struct uac2_output_terminal_descr
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ - .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED), + .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER), .bAssocTerminal = 0, /* .bSourceID = DYNAMIC */ /* .bCSourceID = DYNAMIC */