Re: [PATCH 2/6] usb: gadget: mv_udc: disable HW zlt for ep0

[Felipe Balbi]

Hi,

On Tue, Feb 25, 2014 at 07:46:08AM +0000, Peter Chen wrote:
> > > > > > Hardware zlt will try to send the zero length packet
> > > > > > automatically when the data transferd is multiple times of max
> > > > > > packet, this will cause issues on Windows.
> > > > > > So let's disable HW zlt by default.
> > > > >
> > > > > Would you have description that what kinds of issue on Windows if
> > > > > zlt is is selected?
> > > > >
> > > >
> > > > Enumeration will fail.
> > > >
> > >
> > > What causes enumeration fail, why it does not occur before?
> > >
> > A unexpected zero packet cause enumeration fail.
> > It's not easy that the descriptor is actually 1024 bytes, so not easy to
> > be found.
> > 
> 
> Chipidea bug too? Does it follow ch 8.5.3.2 Variable-length Data Stage, USB 2.0 spec?

wait, this is a chipidea core ? Why aren't you guys using the chipidea
driver yet ? You need to switch over to that driver dude, we can't have
duplicated code in the tree.

I'm sorry, but I won't be taking this series, please use chipidea
driver, it should be very simple to add a glue layer for your core to
the chipidea driver.

-- 
balbi

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