Re: [PATCH] ARM: dts: dra7: Disable USB metastability workaround for USB2

[Tony Lindgren <tony@atomide.com>]

* Felipe Balbi <balbi@kernel.org> [171204 11:43]:
> Roger Quadros <rogerq@ti.com> writes:
> 
> > The metastability workaround causes Erratic errors [1]
> > on the HighSpeed USB PHY which can cause upto 2 seconds
> > delay in enumerating to a USB host while in Gadget mode.
> >
> > Disable the Run/Stop metastability workaround to avoid this
> > ill effect. We are aware that this opens up the opportunity
> > for Run/Stop metastability, however this issue has never been
> > observed in TI releases so we think that Run/Stop metastability
> > is a lesser evil than the PHY Erratic errors. So disable it.
> >
> > [1] USB controller trace during gadget enumeration
> >     irq/90-dwc3-969   [000] d...    52.323145: dwc3_event: event (00000901): Erratic Error [U0]
> >     irq/90-dwc3-969   [000] d...    52.560646: dwc3_event: event (00000901): Erratic Error [U0]
> >     irq/90-dwc3-969   [000] d...    52.798144: dwc3_event: event (00000901): Erratic Error [U0]
> >
> > Signed-off-by: Roger Quadros <rogerq@ti.com>
> 
> FWIW:
> 
> Acked-by: Felipe Balbi <felipe.balbi@linux/intel.com>
> 
> I'm taking the dwc3 counterpart to v4.16

OK applying this into omap-for-v4.16/dt thanks.

Tony