On 1/3/20 10:17 AM, Al Cooper wrote: > When the EHCI controller received a 512 byte USB packet that > had to be broken into 2 256 byte bursts across the SCB bus AND > there was a following 512 byte USB packet, the second burst of > data from the first packet was sometimes being lost. If the > burst size was changed to 128 bytes via the EBR_SCB_SIZE field > in the USB_CTRL_EBRIDGE register we'd see the 4th 128 byte burst > of the first packet being lost. This problem became much worse > if other threads were running that accessed memory, like a memcpy > test. Setting the EBR_SCB_SIZE to 512, which prevents breaking > the EHCI USB packet (max size of 512 bytes) into bursts, fixed > the problem. > > Signed-off-by: Al Cooper <alcooperx@xxxxxxxxx> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx> -- Florian
