On 09/03/17 11:44, Sergei Shtylyov wrote: > Hello! > > On 3/9/2017 11:47 AM, Roger Quadros wrote: > >> As per [1] issue #4, >> "The periodic EP scheduler always tries to schedule the EPs >> that have large intervals (interval equal to or greater than >> 128 microframes) into different microframes. So it maintains >> an internal counter and increments for each large interval >> EP added. When the counter is greater than 128, the scheduler >> rejects the new EP. So when the hub re-enumerated 128 times, >> it trigged this condition." > > Triggered. Should be "triggers" actually. Will fix it. Thanks. > >> This results in Bandwidth error when devices with periodic >> endpoints (ISO/INT) having bInterval > 7 are plugged an >> unplugged several times on a TUSB73x0 xhci host. >> >> Workaround this issue by limiting the bInterval to 7 >> (i.e. interval to 6) for High-speed or faster periodic endpoints. >> >> [1] - http://www.ti.com/lit/er/sllz076/sllz076.pdf >> >> Signed-off-by: Roger Quadros <rogerq@xxxxxx> > [...] > > MBR, Sergei > -- cheers, -roger -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
