Roger Quadros <rog...@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 <rog...@ti.com>
FWIW: Acked-by: Felipe Balbi <felipe.balbi@linux/intel.com> I'm taking the dwc3 counterpart to v4.16 -- balbi
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