Change DSP clock in IPNC 3.0 on DM8148

Hello,

I am trying to chage the DSP clock rate on the DM8148 EVM. I am using IPNC 3.0. I have seen a variety of posts about various ways to do it and have had no luck so far. Here is what I have tried.

Method 1 - Change gem_ick in kernel

clkp = clk_get(NULL, "gem_ick");
if(!IS_ERR(clkp))
   ret = clk_enable(clkp);
else {
   pr_err("unable to get clock\n");
}
if(ret)
   pr_err("unable to enable clock\n");

rrate = clk_get_rate(clkp);
printk("dsp clock running at %uHz\n", rrate);

rrate = clk_round_rate(clkp, 600000000);
ret = clk_set_rate(clkp, rrate);
if (ret)
pr_err("Failed to set the requested rate %lu and dsp running at %lu", rrate, clk_get_rate(clkp));

This resulted in 

Failed to set the requested rate 200000000 and dsp running at 200000000

The rounding function rounds the 600MHz down to 200 MHz and then fails to set this frequency. Additionally I saw no change in processing speed.

Method 2 - DSP main function

I noticed that one of the first lines of main for the DSP sets the clock frequency:

void main(void)
{

    Utils_setCpuFrequency(SYSTEM_DSP_FREQ);

    System_start(C6XDSP_main);

}

I changed SYSTEM_DSP_FREQ to 600*1000*1000 instead of 500*1000*1000. On run the DSP printed:

[c6xdsp ] ***** SYSTEM : Frequency <ORG> - 500000000, <NEW> - 600000000

[c6xdsp ]

But I did not observe any change in processing speed.

What is the best way to adjust the clock in IPNC 3.0?

Thanks,

Ben