thanks for the info.
While we are checking this.
Can you try below clock increase to get better result
root@tegra-ubuntu:/sys/kernel/debug/bpmp/debug/clk/axi_cbb# cat rate
115200000
root@tegra-ubuntu:/sys/kernel/debug/bpmp/debug/clk/axi_cbb# echo 409600000 > rate
or whatever is the max rate
root@tegra-ubuntu:/sys/kernel/debug/bpmp/debug/clk/axi_cbb# echo 1 > mrq_rate_locked