Under certain conditions, the ipc_rpmsg_echo_linux project will crash the DM R5F after 49 days of continuous operation. After the DM R5F crashes, device management (DM) and power management (PM) requests fail. This can render the device inoperable until a power cycle resets the DM R5F. This behavior can be fixed by updating the firmware running on the DM R5F.

Both SPL and SBL bootflows can be affected:

SPL boot: ipc_rpmsg_echo_linux is the prebuilt DM R5F firmware binary “ipc_echo_testb_mcu1_0_release_strip.xer5f” distributed in the Linux SDK**, and at https://git.ti.com/cgit/processor-firmware/ti-linux-firmware/tree/ti-dm?h=ti-linux-firmware
SBL boot: ipc_rpmsg_echo_linux is the default DM R5F firmware loaded in some SBL examples
For more information about the issue, and how to fix it, please refer to:

customer alert: https://e2e.ti.com/support/processors-group/processors/f/791/t/1515316
FAQs: https://e2e.ti.com/support/processors-group/processors/f/791/t/1511929