Serial Driver DMA issue in imx6 board

[prateek22]

Hi ,

I have upgrade my imx6 board from Linux kernel 3.0.35 to 6.1.22. We have interfaced sensor device which was publishing data at 19200 baud rate with 180 bytes per 100 millisecond.

In old kernel we are able to read 180 bytes data using read() system call every 100 millisecond but in new kernel we have receiving data in chunks of 1024 bytes per 600 millisecond.

Could let us know the what changes have been implemented in serial driver which causes this issue.

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

These are the current configuration fields, please ensure that you have set them properly.

Regards

[prateek22]

I am able to receive data but transmitter device is sending data at 180bytes per 0.1 sec but when I am trying to read per 0.1 sec. It's not showing data.

Instead I see its reading 1080 bytes at on every 0.6th sec.
This system was working fine in older kernel,