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How to increase RPMSG baud rate on iMX6SX?

Question asked by liushuo on Sep 20, 2017
Latest reply on Sep 21, 2017 by Biyong Sun

I'm testing the rpmsg on iMX6SX using the rpmsg tty driver "imx_rpmsg_tty.ko". The communication between the A9 coreand M4 core is successful, but the data rate seems very low. I checked the settings of the "ttyRPMSG" device, and found the default buad rate is only 38400:

# stty -F /dev/ttyRPMSG
speed 38400 baud; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbel


How do I increase this baud rate(for example, 115200)?

Is there any alternative way to achieve a faster communication speed between the A9 core and M4 core, instead of using the tty interface?