UsbGadget: Update SDP enum timeout when gadget is pulled up
Indicate to the kernel that the usb gadget is pulled up
by writing to `update_sdp_enum_timeout` sysfs node. Write
to this node will inform the kernel that it can lower the SDP
timeout alarm value which is used to detect an SDP port
vs a DCP.
ported from c5c5b127a7ed0db559d286284fe77b656bef6945
Bug: 275687235
Test: Check `update_sdp_enum_timeout` is written into after usb
gadget is pulled up. Verify that the alarm timeout lowers.
Change-Id: Id3ae7e7a20b236cec6604414a7f81860e868bdd0
Signed-off-by: Amit Sunil Dhamne <amitsd@google.com>
diff --git a/usb/gadget/UsbGadget.h b/usb/gadget/UsbGadget.h
index 5975930..a6b63bd 100644
--- a/usb/gadget/UsbGadget.h
+++ b/usb/gadget/UsbGadget.h
@@ -115,6 +115,10 @@
ScopedAStatus setVidPid(const char *vid,const char *pid);
+ // Indicates to the kernel that the gadget service is ready and the kernel can
+ // set SDP timeout to a lower value.
+ void updateSdpEnumTimeout();
+
private:
Status tearDownGadget();
Status getUsbGadgetIrqPath();