usb: dwc3-msm: Add external client ID event notification
Some peripherals share the USB connector, such as MHL, in which the ID
pin is queried for voltage level determining the type of cable
connected. Support this by allowing these peripherals to act as clients
that can register for ID event notification.
The registered callback is called upon ID state change, and when it
returns 0, USB assumes the client is now handling the connection from
this point. When the client is done, it will call the USB callback
(passed as function parameter) indicating offline, at which point USB
can continue to assume a USB connection.
Change-Id: I4abe2c8ba9610ffa28895dfeb641fb625ada7c51
Signed-off-by: Jack Pham <jackp@codeaurora.org>
2 files changed