Currently the driver will schedule isoc transfers immediately on the next interval, which is quite aggressive when the interval is 125us. There's report that some platforms may need more time to process the transfer, otherwise the controller may miss the first interval. Let's keep it simple and give the controller at least 500us to schedule the isoc transfer. Link: https://lore.kernel.org/linux-usb/20220302143539.GI11577@pengutronix.de/ Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Link: https://lore.kernel.org/r/deb8146b8e1f7f8495ef2d5647017270934cb2d8.1646708142.git.Thinh.Nguyen@synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>