Hello everyone
When I use the serial port to send and receive data on imx6d and imx7d, an overrun error occurs when the serial port is sent. The Linux version I use on imx6 is 3.14.52, and the Linux version used on imx7 is 4.9.88.
Reading the previous post, I found that the serial port has overrun problems. Others have also encountered them. After referring to their previous solutions, I found that it did not solve my problem. For example, remove:
dev_err(sport->port.dev, "Rx FIFO overrun\n");
Use dma.
When I use serial port to transmit data on IMX6/IMX7, I use dma for data transmission. However, overrun still occurs. Does the official website have a correct solution for this error? Please explain in detail the cause of overrun. I already know that the serial port is too late to receive data and cause an overrun error. What I want to know is where it is too late to receive.
