rpmsg problem on imx6sx

[jingyangxie]

Hi,all

     I have a imx6sxsabresd motherboard, when I follow the "i.MX Linux Reference Manual", loading Linux terminal imx_rpmsg_tty.ko, M4 serial port will be garbled, while without doing rpmsg communication, M4 serial port work well . Any suggestions?

PS: Linux BSP 3.14.52

[igorpadykov]

Hi jingyang

please try with "uart_from_osc" kernel boot parameter described in

Table 11. Common kernel boot parameters attached Linux Manual.

Also one can try with L3.14.52 demo images:

https://www.nxp.com/webapp/Download?colCode=L3.14.52_1.1.0_iMX6SX&appType=license&location=null 

Best regards
igor
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[jingyangxie]

Hi,igor

   I have added "uart_from_osc" in uboot env,M4 serial port work fine in other demos without rpmsg

[igorpadykov]

Hi jingyang

please check testing description in attached Linux Manual sect.

52.5 Running i.MX RPMsg Test Programs:

Run the following command and ensure that the RPMsg TTY receiving program
is running at backend when starting RPMsg TTY tests.
/unit_tests/mxc_mcc_tty_test.out /dev/ttyRPMSG 115200 R 100 1000 &

Best regards
igor

[jingyangxie]

Hi,igor

    I have followed the Manual for mxc_mcc_tty_test,but problem remains.It's normal to start running on the M4 program, but when I enter "insmod imx_rpmsg_tty.ko" at the A9 side, the serial port of the M4  will be messed up.