On Mon, Mar 25, 2019 at 06:07:02PM +0800, Macpaul Lin wrote: > Hi Bin and Daniele, > > Bin Liu <b-liu@xxxxxx> 於 2019年3月22日 週五 下午9:11寫道： > > > > + linux-usb list > > > > Hi, > > > > On Tue, Mar 12, 2019 at 04:11:15AM +0100, Daniele Orlandi wrote: > > > > > > Hello, > > > > > > I'm writing you in reference to the discussion archived here: > > > > > > https://www.spinics.net/lists/linux-usb/msg167003.html > > > > > > Did I correctly understand that OTG support has been removed from musb > > > driver? > > > > The plan is to remove otg SRP/HNP protocol support from musb driver, > > since it appears nobody uses it. But in currently kernel the protocols > > are just disabled, the code is not removed yet. > > As far as I know otg SRP/HNP supporting from musb driver still required for > SoC > or end product to get USB-IF certification (from USB association). SRP/HNP is required for certification only if the DUT is claimed to be an OTG device (not dual role though). But based on the survey on this mailing list, it seems there is no device with musb needs SRP/HNP, this is how the decision was made. Regards, -Bin.
