Other Parts Discussed in Thread: DM3730
We have a DM3730 board. And Linux kernel 3.3.7. We need rs485 on UART3, so we patched kernel with this patch http://comments.gmane.org/gmane.linux.serial/6333. Now we have a problem. When we starts Qt QWS app (Qt 4.7.3), UART3 interrupt occurs with latency up to 50-60ms. Moreover if we press <Ctrl>+<Alt>+<F2>(change terminal) then latency drops to 2-3ms. After press <Ctrl>+<Alt>+<F1> latency grows again.
It is strange that only THRE interrupt in UART_OMAP_SCR_TX_EMPTY_CTL_IT mode occurs with big latency, another UART3 interrupts occures within 2-3ms. So we think that it cant be software problem. Can it be bug of DM3730 chip?
