Messages in this thread | | | From | Felipe Balbi <> | Subject | Re: [PATCH v10 5/6] usb:cdns3 Add Cadence USB3 DRD Driver | Date | Mon, 12 Aug 2019 15:46:25 +0300 |
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Hi,
Roger Quadros <rogerq@ti.com> writes: >> The sysfs file we expose from the class for the role switches is >> primarily meant for supporting proprietary protocols that require us >> to basically override the connector USB data role. The default role >> should always be selected in the drivers. > > OK. Let's take this example > - Port is dual-role port micro AB. > - microAB to type-A adapter is connected which pulls ID low. port transitions > to "host" role by the controller driver. > - proprietary protocol want to switch role to device role so writes "device" to > mode switch sysfs. port transitions to "device" role. > > Now, how does controller driver know to fall back to HW based role switching?
Use a 'disconnect' or 'suspend' event to go reset it? But that should, probably, be done at kernel space, no?
-- balbi [unhandled content-type:application/pgp-signature]
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